A plate and plate heat exchanger for an integrated condensation and evaporation

Abstract

According to the present disclosure, a plate and plate heat exchanger (1000) for generating at least one effect of an integrated condensation and evaporation is disclosed. The heat exchanger (1000) comprises at least one integrated condensation-evaporation unit (70a, 70b) comprising a stack of plates. The stack of plates comprises two configuration plates (300a, 400a) placed at a front end and a rear end, two condensation plates (200a, 200b) placed between two configuration plates (300a, 400a), and two level control and evaporation plates (100a, 100b) placed between two condensation plates (200a, 200b). The heat exchanger provides internal separation of vapor and liquid thereby simplifying the construction of condensation-evaporation units directly next to each other in a row. The plate and plate heat exchanger (1000) optionally comprises a preheating unit (80) connected in series with the integrated condensation-evaporation unit (70a, 70b).

Description

A PLATE AND PLATE HEAT EXCHANGER FOR AN INTEGRATED CONDENSATION AND EVAPORATIONTECHNICAL FIELD OF THE INVENTION

[0001] The present invention generally relates to a field of heat exchangers, and more particularly, relates to a plate and plate heat exchanger for generating at least one effect of an integrated condensation and evaporation with internal separation of vapor and liquid.BACKGROUND OF THE INVENTION

[0002] In the realm of industrial processes reliant on plate and plate heat exchangers, the separation of vapor and concentrate at the outlet presents a significant logistical challenge. Typically, these heat exchangers are designed to efficiently transfer heat between two fluids, utilizing a series of corrugated plates and seals to maintain separation and pressure integrity. However, the nature of this separation means that each unit must have sufficient space at its outlet to ensure proper function and prevent interference with neighboring units. This spatial requirement arises from the need to maintain distinct pathways for vapor and concentrate as they exit the heat exchanger. Vapor is directed towards outlets designed to handle gaseous flow, while concentrate exits through ports intended for liquid discharge.

[0003] The practical implications of this design limitation become evident in industrial settings where space optimization is critical. Attempting to install multiple condensation-evaporation units in a continuous row becomes problematic due to the necessary spacing mandated by the heat exchanger's outlet configuration. Placing units directly adjacent to each other risks compromising the integrity of vapor and concentrate separation, potentially leading to operational inefficiencies or even cross-contamination between processes.

[0004] Thus, there remains a need in the art to develop a plate and plate heat exchanger for integrated condensation and evaporation with internal separation of vapor and liquid thereby balancing the spatial constraints imposed by the heat exchanger's design with the need to maximize floor space utilization and operational efficiency in complex industrial environments.OBJECT OF THE INVENTION

[0005] It is the primary object of the present disclosure to provide a plate and plate heat exchanger for generating an effect of an integrated condensation and evaporation with internal separation of vapor and liquid.

[0006] It is another object of the present disclosure to provide a plate and plate heat exchanger for generating two effects of an integrated condensation and evaporation with internal separation of vapor and liquid.

[0007] It is another object of the present disclosure to provide a plate and plate heat exchanger for generating an effect of preheating the input liquid.

[0008] It is still another object of the present disclosure to provide a plate and plate heat exchanger for generating dual effect of an integrated condensation and evaporation with internal separation of vapor and liquid and an effect of preheating the input liquid.

[0009] It is still another object of the present disclosure to provide a plate and plate heat exchanger for transporting particles with the solution.

[0010] It is still another object of the present disclosure to provide a method for generating an effect of an integrated condensation and evaporation with internal separation of vapor and liquid.

[0011] It is still another object of the present disclosure to provide a method for generating dual effect of an integrated condensation and evaporation with internal separation of vapor and liquid and an effect of preheating the input liquid.SUMMARY OF THE INVENTION

[0012] In an aspect of the present disclosure, a plate and plate heat exchanger for an integrated condensation and evaporation is disclosed. The plate and plate heat exchanger comprises at least one integrated condensation-evaporation unit comprising a stack of plates. The stack of plates comprises two configuration plates comprising a first configuration plate placed at a front end and a second configuration plate placed at a rear end, two condensation plates placed between two configuration plates, comprising a first condensation plates and a second condensation plate and two level-control and evaporation plates placed between two condensation plates.

[0013] The at least one configuration plate receives a first vapor and passes the first vapor through two condensation plates, two level-control and evaporation plates and through condensation channels formed between configuration plates and condensation plates, thereby forming a distillate by condensing the first vapor in condensation channels. The at least one configuration plate receives a first hot feed and passes the first hot feed through two condensation plates, two level control and evaporation plates and through evaporation channels formed between two level control and evaporation plates and condensation plates, thereby forming a second vapor by flashing the first hot feed in evaporation channels. Two level control and evaporation plates receives a concentrate formed from at least partially concentrated first hot feed in a concentrate channel formed between two level control and evaporation plates while the first hot feed gets evaporated in the evaporation channels and passes the concentrate towards the at least one configuration plate at the rear end. At least one configuration plate outputs the distillate, the second vapor and the concentrate.

[0014] In another aspect of the present disclosure, a plate and plate heat exchanger for an integrated condensation and evaporation comprising a plurality of integrated condensation-evaporation units and a plurality of feed preheating units. At least one integrated condensation-evaporation unit comprising a stack of plates is connected in series with each feed preheating unit. The stack of plates comprises a configuration as each of the integrated condensation-evaporation unit of the previous aspect of the present disclosure.

[0015] In yet another aspect of the present disclosure, a method for generating at least one effect of an integrated plate and plate evaporation and condensation is disclosed. The method comprises the steps of receiving and passing a first vapor through vapor through holes of a first configuration plate and a first condensation plate in at least one integrated condensation-evaporation unit, condensing the first vapor in a first condensation channel formed between the first configuration plate and the first condensation plate, thereby forming a distillate, passing a first hot feed through first feed through holes of the first configuration plate, the first condensation plate and a first level control and evaporation plate in at least one integrated condensation-evaporation unit, flashing the first hot feed in a first evaporation channel formed between the first condensation plate and the first level control and evaporation plate, thereby forming a second vapor, and forming a concentrate from at least partially concentrated first hot feed in a first concentrate channel while the first hot feed gets evaporated in the first evaporation channel.

[0016] The method further comprises the steps of passing the concentrate through the level control and concentrate passage holes of the first level control and evaporation plate and a second level control and evaporation plate, and passing the first hot feed further through the feed through holes of the second level control and evaporation plate and a second condensation plate, flashing the first hot feed in a second evaporation channel formed between the second level control and evaporation plate and the second condensation plate, thereby forming the second vapor, passing the first vapor through vapor through holes of the second condensation plate in at least one integrated condensation-evaporation unit and condensing the first vapor in a second condensation channel formed between the second configuration plate and the second condensation plate, thereby forming the distillate, and outputting the distillate, the second vapor and the concentrate in at least one configuration plate.BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The detailed description is described with reference to the accompanying figures. In the figures, the left-most digit(s) of a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the drawings to reference features and modules.

[0018] illustrates an isometric view of a plate and plate heat exchanger (1000) for generating at least one effect of an integrated condensation and evaporation in accordance with an exemplary embodiment of the present disclosure.

[0019] - 2b illustrate the configuration of the condensation plate and the level control and evaporation plate in accordance with the present disclosure.

[0020] – 2d illustrate the configuration of the first configuration plate (300a) and the second configuration plate (400a) of the integrated condensation-evaporation unit (70a) in accordance with the present disclosure.

[0021] illustrates an isometric view of a plate and plate heat exchanger (1000) for generating two effects of an integrated condensation and evaporation (70a, 70b) in accordance with another embodiment of the present disclosure.

[0022] illustrates the configuration of third configuration plate (400b) of the second integrated condensation-evaporation unit (70b) in accordance with the present disclosure.

[0023] Figures 5a-5b illustrate an isometric view and a side view of a plate and plate heat exchanger (1000) for generating at least one effect of preheating (80) in accordance with another embodiment of the present disclosure.

[0024] -6b illustrate the configuration of the first preheat configuration plate (600) and the second preheat configuration plate (500) of the feed preheating unit (80) in accordance with the present disclosure.

[0025] illustrates an isometric view of a plate and plate heat exchanger (1000) for generating at least both effect of integrated condensation-evaporation and preheating in accordance with another embodiment of the present disclosure.

[0026] -8b illustrate the configuration of the first configuration plate (300c) and the second configuration plate (400c) of the heat exchanger (1000) in accordance with another embodiment of the present disclosure.

[0027] illustrates a side view of a plate and plate heat exchanger (1000) for generating both effect of integrated condensation-evaporation and preheating in accordance with another embodiment of the present disclosure.DETAILED DESCRIPTION OF THE INVENTION

[0028] The invention will be described in detail below with reference to the drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation procedures are given, but the scope of protection of the present invention is not limited to the following embodiments.

[0029] According to an exemplary embodiment of the present disclosure, a plate and plate heat exchanger for an integrated condensation and evaporation is disclosed. The heat exchanger provides internal separation of vapor and liquid thereby simplifying the construction of condensation-evaporation units directly next to each other in a row.

[0030] In the embodiment of the present disclosure, a plate and plate heat exchanger for combined condensation and evaporation along with preheating frame is disclosed. The plate and frame heat exchanger, also called the, “Plate and Plate condenser and evaporator (PnP-CaE)”, comprises a condensation-evaporation unit and a feed preheating unit. Further, the condensation-evaporation unit comprises of at least two condensation plates, at least two level control and evaporation plates. The heat exchanger is designed to provide internal separation of vapor and liquid.

[0031] In an embodiment of the present disclosure, the integrated condensation and evaporation directs three streams comprising an incoming first vapor, a feed / solution to be concentrated and a newly generated second vapor. Further, the unit transports particles / emerging crystals with the solution.

[0032] In an embodiment of the present disclosure, the integrated condensation and evaporation is configured to allow a plurality of flows to pass through it. The plurality of flows comprises an incoming feed / concentrate, an outgoing feed / concentrate, an incoming first vapor, a newly generated outgoing second vapor, an incoming distillate and an outgoing distillate.

[0033] In an embodiment of the present disclosure, the feed preheating unit comprises a first configuration plate, a first condensation plate, a first preheat frame, a second condensation plate, a second configuration plate and a second preheat frame.

[0034] In an embodiment of the present disclosure, the feed preheating unit is configured to allow a plurality of flows to pass through it. The plurality of flows comprising an incoming first vapor, an incoming feed, an outgoing feed, an incoming distillate and an outgoing distillate.

[0035] In an embodiment of the present disclosure, the at least two level control and evaporation plates are limited by a first condensation plate at front and a second condensation plate at back.

[0036] In an embodiment of the present disclosure, the condensation plate is provided with a plurality of through holes to allow the plurality of flows comprising a feed / concentrate, a first vapor, a second vapor, a distillate and the feed to be preheated.

[0037] In an embodiment of the present disclosure, the level control and evaporation plate is provided with the plurality of through-holes as provided with the condensation unit. Additionally, the level control and evaporation plate comprises at least one set additional through-holes directing the feed / concentrate flows into a channel where the feed / concentrate flows downwards.

[0038] In an embodiment of the present disclosure, a plate and plate heat exchanger for generating at least one effect of an integrated condensation and evaporation is disclosed. The plate and plate heat exchanger comprises at least one integrated condensation-evaporation unit comprising a stack of plates. The stack of plates comprises two configuration plates comprising a first configuration plate placed at a front end and a second configuration plate placed at a rear end, two condensation plates placed between two configuration plates, comprising a first condensation plates and a second condensation plate and two level-control and evaporation plates placed between two condensation plates.

[0039] In an embodiment of the present disclosure, at least one configuration plate receives a first vapor and passes the first vapor through two condensation plates, two level-control and evaporation plates and through condensation channels formed between configuration plates and condensation plates, thereby forming a distillate by condensing the first vapor in condensation channels. The at least one configuration plate receives a first hot feed and passes the first hot feed through two condensation plates, two level control and evaporation plates and through evaporation channels formed between two level control and evaporation plates and condensation plates, thereby forming a second vapor by flashing the first hot feed in evaporation channels. Two level control and evaporation plates receives a concentrate formed from at least partially concentrated first hot feed in a concentrate channel formed between two level control and evaporation plates while the first hot feed gets evaporated in the evaporation channels and passes the concentrate towards the at least one configuration plate at the rear end. At least one configuration plate outputs the distillate, the second vapor and the concentrate.

[0040] In an embodiment of the present disclosure, the first configuration plate comprises a first feed through hole on a lower edge receiving and passing the first hot feed, and a first vapor through hole on an upper edge receiving and passing the first vapor.

[0041] In an embodiment of the present disclosure, the second configuration plate comprises a second vapor through hole on an upper edge receiving and passing the second vapor, a second feed through hole on a lower edge receiving and passing the concentrate being a second feed, and a distillate through hole on the lower edge receiving and passing the distillate.

[0042] In an embodiment of the present disclosure, each condensation plate and each level control and evaporation plate comprises at least two identical through-holes next to each other on the corners of upper edge comprising the first vapor through hole receiving and passing the first vapor, and the second vapor through hole receiving and passing the second vapor and at least three identical through-holes next to each other on the lower edge of the plate comprising the first feed through hole, the second feed through hole on the corners of the lower edge and the distillate through hole between the first feed through hole and the second feed through hole. Each level control and evaporation plate further comprises a plurality of level control and concentrate passage holes at a center region between the upper edge and the lower edge for passing partially concentrated first hot feed due to the evaporation, into the concentrate channel. The plurality of level control and concentrate passage holes are made in a shape selected from a rectangle, square, circle, oval triangle or a polygonal shape.

[0043] In an embodiment of the present disclosure, the plate and plate heat exchanger optionally comprises at least one feed preheating unit. The at least one feed preheating unit is connected in series with at least one integrated condensation-evaporation unit. The at least one feed preheating unit comprises two preheat configuration plates at a front end and a rear end, comprising a first preheat configuration plate and a second preheat configuration plate, two condensation plates placed between two preheat configuration plates, comprising a third condensation plate and a fourth condensation plate, and at least one preheat frame placed between two condensation plates.

[0044] In an embodiment of the present disclosure, the first preheat configuration plate receives the first vapor and passes the first vapor through two condensation plates, at least one preheat frame and through condensation channels, formed between the first preheat configuration plate and the third condensation plates and between the at least one preheat frame and the fourth condensation plates respectively, thereby forming the distillate by condensing the first vapor in condensation channels. The second preheat configuration plate receives the first feed and passes the first feed through the two condensation plates, at least one preheat frame, and through the feed preheating channels formed between the second preheat configuration plate and the fourth condensation plates and between the at least one preheat frame and the third condensation plates respectively, and preheats the first feed with the condensation heat of the first vapor transferred via the condensation plates thereby forming the first hot feed in the feed preheating channels. The second preheat configuration plate outputs the distillate, the second vapor and the first hot feed.

[0045] In an embodiment of the present disclosure, each condensation plate of the at least one feed preheating unit is made in a same configuration as the condensation plate of the at least one integrated condensation-evaporation unit.

[0046] In an embodiment of the present disclosure, the first preheat configuration plate comprises the first vapor through hole on an upper edge receiving and passing the first vapor, the second vapor through hole on the upper edge receiving and passing the second vapor, the second feed through hole on a lower edge receiving and passing the concentrate being the second feed, and the distillate through hole on the lower edge receiving and passing the distillate.

[0047] In an embodiment of the present disclosure, the second preheat configuration plate comprises the second vapor through hole on the upper edge receiving and passing the second vapor, the second feed through hole on a lower edge receiving and passing the concentrate being the second feed, and the distillate through hole on the lower edge receiving and passing the distillate. The second preheat configuration plate is made in a same configuration as the second configuration plate of the integrated condensation-evaporation unit. The second preheat configuration plate comprises a preheating feed through hole on the lower edge positioned below the distillate through hole, for receiving and passing the first feed.

[0048] In an embodiment of the present disclosure, each condensation plate and each preheat frame further comprises the preheating feed through hole on the lower edge positioned below the distillate through hole for passing the first feed.

[0049] In an embodiment of the present disclosure, each condensation plate, each preheat frame and the first preheat configuration plate comprises at least one central preheating through hole on the upper edge above an area between the first vapor through hole and the second vapor through hole for passing the first hot feed. At least one central preheating through hole has a diameter smaller than the diameters of the first vapor through hole and the second vapor through hole.

[0050] In an embodiment of the present disclosure, each configuration plate, each condensation plate and each level control and evaporation plate comprises at least one central preheating through hole configured as same as the central preheating through hole of the condensation plates of the feed preheating unit for passing the first hot feed.

[0051] In an embodiment of the present disclosure, at least one preheat frame is made in a same configuration as the condensation plate of the at least one feed preheating unit.

[0052] In an embodiment of the present disclosure, the second configuration plate further comprises the first vapor through hole on the upper edge receiving and passing the first vapor to the at least one feed preheating unit.

[0053] In another embodiment of the present disclosure, a plate and plate heat exchanger for an integrated condensation and evaporation comprising a plurality of integrated condensation-evaporation units and a plurality of feed preheating units. The at least one integrated condensation-evaporation unit comprising a stack of plates is connected in series with each feed preheating unit.

[0054] In another embodiment of the present disclosure, a method for generating at least one effect of an integrated plate and plate evaporation and condensation is disclosed. The method comprises the steps of receiving and passing a first vapor through vapor through holes of a first configuration plate and a first condensation plate in at least one integrated condensation-evaporation unit, condensing the first vapor in a first condensation channel formed between the first configuration plate and the first condensation plate, thereby forming a distillate, passing a first hot feed through first feed through holes of the first configuration plate, the first condensation plate and a first level control and evaporation plate in at least one integrated condensation-evaporation unit, flashing the first hot feed in a first evaporation channel formed between the first condensation plate and the first level control and evaporation plate, thereby forming a second vapor, forming a concentrate from at least partially concentrated first hot feed in a first concentrate channel while the first hot feed gets evaporated in the first evaporation channel, and passing the concentrate through the level control and concentrate passage holes of the first level control and evaporation plate and a second level control and evaporation plate, and passing the first hot feed further through the feed through holes of the second level control and evaporation plate and a second condensation plate, flashing the first hot feed in a second evaporation channel formed between the second level control and evaporation plate and the second condensation plate, thereby forming the second vapor, passing the first vapor through vapor through holes of the second condensation plate in at least one integrated condensation-evaporation unit and condensing the first vapor in a second condensation channel formed between the second configuration plate and the second condensation plate, thereby forming the distillate, and outputting the distillate, the second vapor and the concentrate in at least one configuration plate.

[0055] In another embodiment of the present disclosure, the method further comprises the steps of passing the distillate from the condensation channels through distillate through-holes respectively of the first condensation plate, the first level control and evaporation plate, the second level control and evaporation plate, the second condensation plate and the second configuration plate, to at least one feed preheating unit, passing the second vapor from the evaporation channels through second vapor through holes respectively of the first level control and evaporation plate, the second level control and evaporation plate, the second condensation plate and the second configuration plate to at least one feed preheating unit and passing the concentrate through second feed through holes respectively of the second level control and evaporation plate, the second condensation plate and the second configuration plate to at least one feed preheating unit.

[0056] In another embodiment of the present disclosure, the method further comprises the steps of passing the first vapor further through first vapor through holes respectively of the first level control and evaporation plate, the second level control and evaporation plate, the second condensation plate and the second configuration plate to at least one feed preheating unit.

[0057] In another embodiment of the present disclosure, the method further comprises generating at least one effect of preheating, comprising the steps of receiving and passing the first vapor through vapor through holes of a first preheat configuration plate and a third condensation plate in at least one feed preheating unit, condensing the first vapor further in a third condensation channel formed between the first preheat configuration plate and the third condensation plate, thereby forming the distillate, receiving and passing the first vapor through vapor through holes of the at least one preheat frame and a fourth condensation plate in at least one feed preheating unit, and condensing the first vapor in a fourth condensation channel formed between at least one preheat frame and the fourth condensation plate, thereby forming the distillate receiving and passing a first feed through a preheating feed through holes of a second preheat configuration plate and the fourth condensation plate in at least one feed preheating unit and preheating the first feed with the condensation heat of the first vapor transferred via the fourth condensation plate, in a first feed preheating channel formed between the second preheat configuration plate and the fourth condensation plate, thereby forming a first hot feed, receiving and passing the first feed through the preheating feed through holes of at least one preheat frame and the third condensation plate in at least one feed preheating unit, and preheating the first feed with the condensation heat of the first vapor transferred via the third condensation plate, in a second feed preheating channel formed between preheat frame and the third condensation plate, thereby forming the first hot feed and passing the first hot feed through the central preheating through holes of the first preheat configuration plate

[0058] In another embodiment of the present disclosure, the method further comprises generating at least one effect of preheating, comprising the steps of passing the first hot feed through at least one central preheating through holes of stack of plates of at least one integrated condensation-evaporation unit and feeding back the first hot feed as an input, to the first feed through holes of stack of plates of at least one integrated condensation-evaporation unit. The at least one feed preheating unit is connected in series with at least one integrated condensation-evaporation unit.

[0059] In an exemplary embodiment of the present disclosure, the heat exchanger receives a liquid feed comprising wastewater. In another embodiment of the present disclosure, the liquid feed comprises spent pickling bath (WPL), contaminated acidic and alkaline process streams, and / or reverse osmosis concentrate. Particles and / or carry-over components, such as contaminated acids and alkalis, can be separated from vapors in the heat exchanger and concentrated acids and alklais are generated as a result of the integrated condensation and evaporation effect.

[0060] Referring to, illustrated is an isometric view of a plate and plate heat exchanger (1000) for generating an effect of an integrated condensation and evaporation (70a) in accordance with an exemplary embodiment of the present disclosure. As shown in, the plate and plate heat exchanger (1000) comprises an effect of integrated condensation-evaporation unit (70a). The integrated condensation-evaporation unit comprises a stack of a plurality of plates, comprising a configuration part of the effect with two configuration plates (300a, 400a) placed at a front end and at a rear end, and a functional part of the effect with two set of different plates, being two condensation plates (200a, 200b) placed between two configuration plates (300a, 400a), and two level control and evaporation plates (100a, 100b) placed between two condensation plates (200a, 200b).

[0061] As shown in, two configuration plates (300a, 400a) comprise a first configuration plate (300a) placed at a front end and a second configuration plate (400a) placed at a rear end. The first configuration plate (300a) comprises a first feed through hole (4) on a lower edge of the plate for receiving and passing a first hot feed (13a) and a first vapor through hole (7) on an upper edge for receiving and passing a first vapor (25).

[0062] Two condensation plates (200a, 200b) comprise a first condensation plates (200a) and a second condensation plate (200b). Each condensation plate (200a, 200b) comprises two identical vapor through-holes (7, 8) next to each other on the corners of upper edge for receiving and passing the first vapor (25) and a second vapor (26). Two identical vapor through-holes (7, 8) comprise a first vapor through hole (7) for receiving and passing the first vapor (25), and a second vapor through hole (8) for receiving and passing a second vapor (26). Each condensation plate (200a, 200b) further comprises three identical through-holes next to each other on the lower edge of the plate. The three identical through-holes comprise a first feed through hole (4), a second feed through hole (5) on the corners of the lower edge and a distillate through hole (9) between the first feed through hole (4) and the second feed through hole (5).

[0063] Two level control and evaporation plates (100a, 100b) comprise a first level control and evaporation plate (100a) and a second level control and evaporation plate (100b). Each level control and evaporation plate (100a, 100b) is made in same configuration as the condensation plate (200a, 200b). Each level control and evaporation plate (100a, 100b) further comprises a plurality of level control and concentrate passage holes (2) at a center region between the upper edge and the lower edge.

[0064] Referring to- 2b, illustrated are the configuration of the condensation plate and the level control and evaporation plate in accordance with the present disclosure.

[0065] Further, the second configuration plate (400a) comprises a second vapor through hole (8) on an upper edge, a second feed through hole (5) on a lower edge and a distillate through hole (9) on the lower edge. The through holes (5, 8, 9) of the second configuration plate (400a) align with or made in same configuration as the condensation plates (200a, 200b).

[0066] Referring to– 2d, illustrated are the configuration of the first configuration plate (300a) and the second configuration plate (400a) of the integrated condensation-evaporation unit (70a) in accordance with the present disclosure.

[0067] The first configuration plate (300a) receives the first vapor (25) as a first input for the effect (70a), through the first vapor through hole (7) and passes the first vapor (25) through two condensation plates (200a, 200b), two level control and evaporation plates (100a, 100b) and into two condensation channels (40a, 40b) formed between configuration plates (300a, 400a) and condensation plates (200a, 200b). Two condensation channels (40a, 40b) comprises a first condensation channel (40a) and a second condensation channel (40b).

[0068] The first configuration plate (300a) passes the first vapor (25) through vapor through holes (7) of the first configuration plate (300a) and the first condensation plate (200a). The first vapor (25) flows into the first condensation channel (40a) formed between the first configuration plate (300a) and the first condensation plate (200a) and condenses on the first condensation plate (200a) thereby forming a distillate (16). Further, the first vapor (25) passes through vapor through holes (7) of the two level control and evaporation plates (100a, 100b) and the second condensation plate (200b). The first vapor (25) flows into the second condensation channel (40b) formed between the second configuration plate (400a) and the second condensation plate (200b) and condenses on the second condensation plate (200b) thereby forming a distillate (16).

[0069] The first configuration plate (300a) receives the first hot feed (13a) as a second input for the effect (70a), through a first feed through hole (4) of the first configuration plate (300a) and passes the first hot feed (13a) through first feed through holes (4) of the two condensation plates (200a, 200b) and two level control and evaporation plates (100a, 100b). The first hot feed (13a) further flows through two evaporation channels (50a, 50b) formed between two level control and evaporation plates (100a, 100b) and condensation plates (200a, 200b). Two evaporation channels (50a, 50b) comprises a first evaporation channel (50a) and a second evaporation channel (50b).

[0070] The first configuration plate (300a) passes the first hot feed (13a) through the first feed through hole (4) of the first configuration plate (300a), and through first feed through holes (4) of the first condensation plate (200a) and the first level control and evaporation plates (100a). When the first hot feed (13a) flows through a first evaporation channel (50a) formed between the first condensation plate (200a) and the first level control and evaporation plates (100a), due to the lower absolute pressure in the first evaporation channel (50a), the first hot feed (13a) flashes and a new second vapor (26) is formed.

[0071] Further, the first hot feed (13a) is passed through the first feed through holes (4) of the second level control and evaporation plate (100b) and the second condensation plate (200b). When the first hot feed (13a) flows through a second evaporation channel (50b) formed between the second condensation plate (200b) and the second level control and evaporation plate (100b), due to the lower absolute pressure in the second evaporation channel (50b), the first hot feed (13a) flashes and a new second vapor (26) is formed.

[0072] The first hot feed (13a) is slightly concentrated due to the evaporation at the evaporation channels (50a, 50b). The slightly / partially concentrated first hot feed (13a) flows through the plurality of level control and concentrate passage holes (2) of the first level control and evaporation plates (100a) and the second level control and evaporation plates (100b), through a concentrate channel (60) formed between two level control and evaporation plates (100a, 100b), thereby forming a concentrate (13b) in the concentrate channel (60). The concentrate (13b) further flows downwards and through second feed through holes (5) of the two level control and evaporation plates (100a, 100b).

[0073] The new second vapor (26) flows upwards in the first evaporation channel (50a) and flows into second vapor through holes (8) of the first level control and evaporation plates (100a). Similarly, the second vapor (26) is passed from all the evaporation channels (50a, 50b) working in parallel and collected in the channel formed by through second vapor through holes (8) of the respectively of the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b) and leaves the effect (70a) by passing second vapor through hole (8) in the second configuration plate (400a).

[0074] The distillate (16) formed in the condensation channels (40a, 40b) by condensation of the incoming first vapor (25) on the condensation plates (200a, 200b) runs down the walls of the condensation plates (200a, 200b) bordering the vapor channel. The distillate (16) flows into distillate through-holes (9) and flows to the back through the distillate through-channels formed by distillate through holes (9) stacked in a row respectively of the first condensation plate (200a), the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b). The distillate (16) leaves the effect (70a) / outside by passing through the distillate through hole (9) in the second configuration plate (400a).

[0075] The concentrate (13b) formed from the concentrate channel (60) flows in a channel formed by second feed through holes (5) respectively of the second level control and evaporation plate (100b), the second condensation plate (200b) and leaves the effect (70a) by passing through the second feed through holes (5) in the second configuration plate (400a).

[0076] In a preferred implementation of the present invention as shown in, through-holes (4, 5, 7, 8, 9) of the stack of plates in an effect of integrated condensation-evaporation unit (70a) are made in a circular shape and the plurality of level control and concentrate passage holes (2) are made in a rectangular shape.

[0077] In another embodiment, through-holes (4, 5, 7, 8, 9) of the stack of plates and the plurality of level control and concentrate passage holes (2) are made in a suitable shape selected from a rectangle, square, circle, oval triangle or a polygonal shape.

[0078] Referring to, illustrated is an isometric view of a plate and plate heat exchanger (1000) for generating two effects of an integrated condensation and evaporation (70a, 70b) in accordance with another embodiment of the present disclosure. The plate and plate heat exchanger (1000) comprises a pair of integrated condensation-evaporation units (70a, 70b). The pair comprises a first integrated condensation-evaporation unit (70a) and a second integrated condensation-evaporation unit (70b) connected in series. Each integrated condensation-evaporation unit (70a, 70b) is made in a same configuration as the integrated condensation-evaporation unit (70a) shown in

[0079] However, the second configuration plate (400a) of the first unit (70a) is used as a front end configuration plate for the second integrated condensation-evaporation unit (70b), and a third configuration plate (400b) is placed at a rear end. The second integrated condensation-evaporation unit (70b) also comprises two condensation plates (200a, 200b) placed between two configuration plates (400a, 400b), and two level control and evaporation plates (100a, 100b) placed between two condensation plates (200a, 200b). The third configuration plate (400b) comprises a first vapor through hole (7) on an upper edge, a second feed through hole (5) on a lower edge and a distillate through hole (9) on the lower edge. The through holes (5, 8, 9) of the second configuration plate (400a) align with or made in same configuration as the condensation plates (200a, 200b).

[0080] Referring to, illustrated is the configuration of third configuration plate (400b) of the second integrated condensation-evaporation unit (70b) in accordance with the present disclosure.

[0081] The second unit receives the second vapor (26), distillate (16) and the concentrate (13b) as inputs. In contrast to the first unit (70a), in the second effect (70b), the second vapor (26) condenses on the condensation plates (200a, 200b) and the distillate (16) formed in the condensation channels (40a, 40b) by condensation of the incoming second vapor (26) runs down the walls of the condensation plates (200a, 200b) bordering the vapor channel. The distillate (16) leaves the second effect (70b) / outside by passing through the distillate through hole (9) in the third configuration plate (400b). Further, new third vapor (25a) is formed from the evaporation channels (50a, 50b) of the second unit (70b) and flows through first vapor through holes (7) respectively of the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b). The third vapor (25a) leaves the second effect (70b) by passing through first vapor through hole (7) in the third configuration plate (400b).

[0082] Further, a second effect of concentrate (13c) is formed as the concentrate (13a) is further concentrated due to the evaporation at the evaporation channels (50a, 50b). The concentrate (13c) formed from the concentrate channel (60) flows in a channel formed by first feed through holes (4) respectively of the second level control and evaporation plate (100b), the second condensation plate (200b) and leaves the effect (70b) by passing through first feed through holes (4) in the third configuration plate (400b). As a result of two effects, the third vapor (25a), the distillate (16) and the concentrate (13c) leaves from the third configuration plate (400b) of the unit (70b) from its respective through holes.

[0083] Referring to Figures 5a-5b, illustrated are an isometric view and a side view of a plate and plate heat exchanger (1000) for generating at least one effect of preheating (80) in accordance with another embodiment of the present disclosure. The plate and plate heat exchanger (1000) comprises a feed preheating unit (80). The feed preheating unit (80) comprises two preheat configuration plates (500, 600) at a front end and a rear end, two condensation plates (200c, 200d) placed between two preheat configuration plates (500, 600), a preheat frame (700) placed between two condensation plates (200c, 200d). Two preheat configuration plates (500, 600) comprise a first preheat configuration plate (600) placed at a rear end and a second preheat configuration plate (500) placed at a front end. Two condensation plates (200c, 200d) comprises a third condensation plate (200c) and a fourth condensation plate (200d).

[0084] The first preheat configuration plate (600) comprises a first vapor through hole (7) on an upper edge, a second vapor through hole (8) on the upper edge, a second feed through hole (5) on a lower edge and a distillate through hole (9) on the lower edge. Each condensation plate (200c, 200d) of the feed preheating unit (80) is made in a same configuration as the condensation plate of the integrated condensation-evaporation unit (70a, 70b) as shown inand

[0085] The second preheat configuration plate (500) comprises a second vapor through hole (8) on the upper edge, a second feed through hole (5) on a lower edge, and a distillate through hole (9) on the lower edge receiving and passing the distillate (16). The second preheat configuration plate (500) is made in a same configuration as the second configuration plate (400a) of the integrated condensation-evaporation unit (70a, 70b).

[0086] The preheat frame (700) is made in a same configuration as the condensation plate (200c, 200d) of the feed preheating unit (80) and integrated condensation-evaporation unit (70a) as shown inHowever, installation of a plurality of gaskets in the plate or frame, define distinct channels in the configuration. By different sets of gaskets or one complete gasket, the condensation plate (200) and the preheat plate (700) are configured according to the requirements. The plurality of gaskets configures the flow channels of the vapor, feed and distillate.

[0087] The second preheat configuration plate (500) further comprises a preheating feed through hole (10) on the lower edge positioned below the distillate through hole (9). Similarly, each condensation plate (200c, 200d) and the preheat frame (700) also further comprises the preheating feed through hole (10) on the lower edge positioned below the distillate through hole (9).

[0088] Referring to-6b, illustrated are the configuration of the first preheat configuration plate (600) and the second preheat configuration plate (500) of the feed preheating unit (80) in accordance with the present disclosure.

[0089] Each condensation plate (200c, 200d), each preheat frame (700) and the first preheat configuration plate (600) further comprises a central preheating through hole (11) on the upper edge above an area between the first vapor through hole (7) and the second vapor through hole (8).The central preheating through hole (11) has a diameter smaller than the diameters of the first vapor through hole (7) and the second vapor through hole (8).

[0090] The feed preheating unit (80) receives a first feed (13) as a first input from outside, through a preheating feed through hole (10) of the second preheat configuration plate (500), and a first vapor (25) as a second input through the vapor through hole (7) of the first preheat configuration plate (600). The first vapor (25) passes through vapor through hole (7) of the first preheat configuration plate (600) and the third condensation plate (200c). The first vapor (25) flows into the third condensation channel (40c) formed between first preheat configuration plate (600) and the third condensation plate (200c) and condenses on the third condensation plate (200c) thereby forming a distillate (16). Further, the first vapor (25) passes through vapor through holes (7) of the preheat frame (700) and a fourth condensation plate (200d). The first vapor (25) flows into the fourth condensation channel (40d) formed between the preheat frame (700) and the fourth condensation plate (200d) and condenses on the fourth condensation plate (200d) thereby forming a distillate (16).

[0091] The first feed (13) flows through the preheating feed through holes (10) of the second preheat configuration plate (500) and the fourth condensation plate (200d). The first feed is preheated (13) in a first feed preheating channel (90a) formed between the second preheat configuration plate (500) and the fourth condensation plate (200d), with the condensation heat of the first vapor (25) transferred via the fourth condensation plate (200d), thereby forming a first hot feed (13a). Further, the first feed (13) flows through the preheating feed through holes (10) of the preheat frame (700) and the third condensation plate (200c). The first feed is preheated (13) in a second feed preheating channel (90b) formed between formed between preheat frame (700) and the third condensation plate (200c), with the condensation heat of the first vapor (25) transferred via the third condensation plate (200c), thereby forming a first hot feed (13a).

[0092] The distillate (16) formed in the condensation channels (40c, 40d) by condensation of the incoming first vapor (25) on the condensation plates (200c, 200d) runs down the walls of the condensation plates (200c, 200d) bordering the vapor channel. The distillate (16) flows into distillate through-holes (9) and flows towards the back through the distillate through-channels formed by distillate through holes (9) stacked in a row respectively of the third condensation plate (200c), the preheat frame (700), and the second condensation plate (200b). The distillate (16) leaves the effect (80) outside by passing through the distillate through hole (9) in the second preheat configuration plate (500).

[0093] The first hot feed (13a) flows upwards and passes through central preheating through hole (11) of the fourth condensation plate (200d) and the preheat frame (700). Similarly, the first hot feed (13a) is passed from all the preheating channels (90a, 90b) working in parallel and collected in the channel formed by through central preheating through hole (11) of the respectively of the fourth condensation plate (200d), the preheat frame (700), and third condensation plate (200c), and leaves the effect (80) by central preheating through hole (11) in first preheat configuration plate (600).

[0094] In another embodiment of the present disclosure, a plate and plate heat exchanger (1000) optionally comprises at least one feed preheating unit (80) connected in series with one or more integrated condensation-evaporation unit (70a, 70b) for generating both effects of integrated condensation-evaporation and preheating. The feed preheating unit (80) is connected in series with one or more integrated condensation-evaporation unit (70a, 70b).

[0095] Referring to, illustrated is an isometric view of a plate and plate heat exchanger (1000) for generating at least both effect of integrated condensation-evaporation and preheating in accordance with another embodiment of the present disclosure. Each integrated condensation-evaporation unit (70a, 70b) is made in a same configuration as the integrated condensation-evaporation unit (70a) shown inEach feed preheating unit is made in a same configuration as the feed preheating unit shown in Figures 5a-5b. The feed preheating unit (80) is connected in series with the integrated condensation-evaporation unit (70a) as shown in

[0096] Each configuration plate (300c, 400c), each condensation plate (200a, 200b) and each level control and evaporation plates (100a, 100b) comprises a central preheating through hole (11), configured as same as the central preheating through hole (11) of the condensation plates (200c, 200d) of the feed preheating unit (80) for passing the first hot feed (13a). The second configuration plate (400c) further comprises the first vapor through hole (7) on the upper edge receiving and passing the first vapor (25) to the at least one feed preheating unit (80).

[0097] -8b illustrate the configuration of the first configuration plate (300c) and the second configuration plate (400c) of the heat exchanger (1000) in accordance with another embodiment of the present disclosure.

[0098] The distillate (16), the second vapor (26), the concentrate (13b) from the second configuration plate (400a) are passed to first preheat configuration plate (600) of the preheating unit (80) through the respective through holes. As a result of dual effect, the first hot feed (13a) is passed through the central preheating through holes (11) of the stack of plates of the integrated condensation-evaporation unit (70a, 70b). The first hot feed (13a) is fed back as an input to the first feed through holes (4) of stack of plates of the one integrated condensation-evaporation unit (70a, 70b).

[0099] Referring to, illustrated is a side view of a plate and plate heat exchanger (1000) for generating both effect of integrated condensation-evaporation and preheating in accordance with another embodiment of the present disclosure.

[0100] In another embodiment of the present disclosure, a plate and plate heat exchanger (1000) for an integrated condensation and evaporation comprising a plurality of integrated condensation-evaporation units (70) and a plurality of feed preheating units (80) is disclosed. At least one or more integrated condensation-evaporation unit (70a, 70b) comprising a stack of plates is connected in series with each feed preheating unit. Each integrated condensation-evaporation unit (70a, 70b) is made in a same configuration as the integrated condensation-evaporation unit (70a) shown inEach feed preheating unit is made in a same configuration as the feed preheating unit shown in

[0101] In another embodiment of the present disclosure, a method for integrated plate and frame evaporation and condensation is disclosed. The method comprises the steps of passing the first vapor through a vapor passage hole of the first configuration plate into the condensation channels, whereby the first vapor condenses on the condensation plates, forming the distillate. Passing a first hot feed through a hole in the configuration plate and then passing through the first hot feed through a hole in the condensation plate and then into the evaporation channel, whereby the first hot feed flashes due to the low absolute pressure to produce a new vapor and the evaporation slightly concentrates the first hot feed.

[0102] The method further comprises the step of passing the concentrate through the level control and concentrate passage hole into the concentrate channel. The new vapor flows upwards in the evaporation channel and flows into the second vapor through hole, collecting the new vapor in a channel formed by the individual vapor through holes from all the evaporation channels working in parallel, passing through the second vapor through hole in the configuration plate and condensing the incoming first vapor on the condensation plates, whereby a distillate is formed in the condensation channels. The distillate runs down the walls of the condensation plates bordering the vapor channel and then flows into the distillate through-hole towards the back through the distillate through-channels formed by the connected distillate through-holes and leaves the second configuration plate through the distillate through hole to the outside.

[0103] In an embodiment of the present disclosure, the method further comprises the steps of pre-heating the feed by passing the first feed through hole in the second feed preheating configuration plate into the feed preheating channel, where the feed flows upwards, simultaneously heating the feed by the condensation heat of the vapor transferred via the condensation plate. The feed from each feed preheating channel enters the feed collecting channel formed by the second feed through-holes and leaves the feed preheating unit by passing through the second feed through-hole in the configuration plate. Followed by condensing the incoming first vapor on the condensation plates, whereby a distillate is formed in the condensation channels. The distillate runs down the walls of the condensation plates bordering the vapor channel and then flows into the distillate through-hole towards the back through the distillate through-channels formed by the connected distillate through-holes and leaves the second configuration plate through the distillate through-hole to the outside.

[0104] In an embodiment of the present disclosure, more than one feed preheating unit is provided. The flow direction of the feed is from bottom to top in the first feed preheating unit and from top to bottom in the next feed preheating unit.

[0105] In an embodiment of the present disclosure, at least one of the condensation-evaporation unit is combined with a feed preheating unit. Alternatively, every second condensation-evaporation unit or individual condensation-evaporation units are combined with a feed preheating unit.

[0106] In an implementation of the present disclosure, the condensation plate (200) is fabricated with materials possessing / exhibiting high degree of thermal conductivity. The condensation plate (200) is fabricated with high performance polymer Polyvinylenesulphide (PPS) filled with graphite (Gr) in the range of 55% to 85% by mass. The condensation plate (200) fabricated with PPS-Gr are resistant to continuous temperatures in the range of 90°C to 200°C. The thermal conductivity of the condensation plate (200) fabricated with PPS-Gr is in range of 5 to 8 W / mK. The condensation plate (200) is fabricated with high performance polymer Polypropylene (PP) filled with graphite (Gr) in the range of 50% to 85 % by mass. The condensation plate (200) fabricated with PP-Gr is resistance to continuous temperatures upto 100°C.

[0107] Further, the level control and evaporation plates are fabricated with a material selected from high-performance polymers Polyvinylenesulphide (PPS) or Polypropylene (PP) not containing Graphite (Gr) to achieve a low heat conductivity. The materials, Polyvinylenesulphide (PPS) or Polypropylene (PP) are filled (reinforced) with glass fibre for increasing the mechanical stability of the plates.

[0108] Stricter government regulations aimed at protecting water resources, combined with growing environmental awareness among citizens, are driving increased demand for advanced and novel water treatment technologies. As clean water is increasingly recognized as a finite and vulnerable resource, regulatory frameworks governing water protection have become progressively more stringent. Particularly, zero liquid discharge (ZLD) regulations—which require complete separation of water from dissolved and suspended constituents—have compelled industries to seek alternative and more robust treatment solutions.

[0109] Industrial wastewater subject to ZLD requirements typically contains high concentrations of dissolved salts, exhibits non-neutral pH conditions, and may include significant amounts of organic matter. Conventional separation technologies, such as reverse osmosis, are often ineffective under these conditions. At elevated salt concentrations, osmotic pressure increases substantially, reducing membrane efficiency; moreover, reverse osmosis membranes require near-neutral pH conditions and are generally not resistant to organic substances such as solvents. Consequently, evaporation-based separation remains the only viable option for achieving complete water recovery.

[0110] Traditional evaporators are commonly fabricated from steel alloys selected based on the specific chemical composition of the wastewater. However, the challenging combination of high salinity, extreme pH values, and organic constituents often renders even specialized steel alloys insufficiently durable over extended operational periods. Furthermore, evaporation is inherently energy-intensive, necessitating the use of multi-stage evaporation systems to maximize energy reuse and improve overall efficiency.

[0111] In conventional heat exchangers, both vapor and concentrate are separated at the outlet. Design limitations are there to make the condensation-evaporation units directly next to each other in a row. However, the present invention solves the problem by providing an integrated condensation-evaporation unit with various streams and isolations. Plastics offer a promising alternative material due to their excellent chemical resistance under such aggressive conditions. Nevertheless, a major limitation of plastics is their inherently low thermal conductivity. For example, the thermal conductivity of polypropylene (PP) and polyphenylene sulfide (PPS) is approximately one-fiftieth that of stainless steel. To overcome this limitation, these polymers are commonly filled with graphite, with filler contents reaching up to 85 wt%, thereby significantly enhancing thermal conductivity while retaining the chemical resistance advantages of the polymer matrix.

[0112] The heat transfer values for the filled plastic are 4–10 W / m²K and for stainless steel 16–20 W / m²K. Heat conduction has been significantly improved by adding graphite in the present invention. The plate and plate (PnP) heat exchanger, condenser, and evaporator of the present invention are particularly suitable for use in the steel industry for concentrating spent pickling baths WPL and for concentrating contaminated acids and alkalis from chemical processes. Another major area of application is the final concentration of reverse osmosis concentrate.

Claims

A plate and plate heat exchanger (1000) for generating at least one effect of an integrated condensation and evaporation, comprising:at least one integrated condensation-evaporation unit (70a, 70b) comprising a stack of plates, wherein the stack of plates comprises:two configuration plates (300a, 400a) comprising a first configuration plate (300a) placed at a front end and a second configuration plate (400a) placed at a rear end;two condensation plates (200a, 200b) placed between two configuration plates (300a, 400a), comprising a first condensation plates (200a) and a second condensation plate (200b); andtwo level control and evaporation plates (100a, 100b) placed between two condensation plates (200a, 200b), comprising a first level control and evaporation plate (100a) and a second level control and evaporation plate (100b);wherein at least one configuration plate (300a, 400a) receives a first vapor (25) and passes the first vapor (25) through two condensation plates (200a, 200b), two level control and evaporation plates (100a, 100b) and through condensation channels (40a, 40b) formed between configuration plates (300a, 400a) and condensation plates (200a, 200b), thereby forming a distillate (16) by condensing the first vapor (25) in condensation channels (40a, 40b);at least one configuration plate (300a, 400a) receives a first hot feed (13a) and passes the first hot feed (13a) through two condensation plates (200a, 200b), two level control and evaporation plates (100a, 100b) and through evaporation channels (50a, 50b) formed between two level control and evaporation plates (100a, 100b) and condensation plates (200a, 200b), thereby forming a second vapor (26) by flashing the first hot feed (13a) in evaporation channels (50a, 50b);two level control and evaporation plates (100a, 100b) receives a concentrate (13b) formed from at least partially concentrated first hot feed (13a) in a concentrate channel (60) formed between two level control and evaporation plates (100a, 100b) while the first hot feed (13a) gets evaporated in the evaporation channels (50a, 50b), and passes the concentrate (13b) towards the at least one configuration plate (400a) at the rear end;wherein at least one configuration plate (400a) outputs the distillate (16), the second vapor (26) and the concentrate (13b).The plate and plate heat exchanger as claimed in claim 1, wherein the first configuration plate (300a) comprises:a first feed through hole (4) on a lower edge receiving and passing the first hot feed (13a); anda first vapor through hole (7) on an upper edge receiving and passing the first vapor (25).The plate and plate heat exchanger as claimed in claim 1, wherein the second configuration plate (400a) comprises:a second vapor through hole (8) on an upper edge receiving and passing the second vapor (26);a second feed through hole (5) on a lower edge receiving and passing the concentrate (13b) being a second feed; anda distillate through hole (9) on the lower edge receiving and passing the distillate (16).The plate and plate heat exchanger as claimed in claim 1, wherein each condensation plate (200a, 200b) and each level control and evaporation plate (100a, 100b) comprises:at least two identical through-holes next to each other on the corners of upper edge comprising the first vapor through hole (7) receiving and passing the first vapor (25), and the second vapor through hole (8) receiving and passing the second vapor (26); andat least three identical through-holes next to each other on the lower edge of the plate comprising the first feed through hole (4), the second feed through hole (5) on the corners of the lower edge and the distillate through hole (9) between the first feed through hole (4) and the second feed through hole (5).The plate and plate heat exchanger as claimed in claim 4, wherein each level control and evaporation plate (100a, 100b) further comprises a plurality of level control and concentrate passage holes (2) at a center region between the upper edge and the lower edge for passing partially concentrated first hot feed (13a) due to the evaporation, into the concentrate channel (60).The plate and plate heat exchanger as claimed in claim 5, wherein the plurality of level control and concentrate passage holes (2) are made in a shape selected from a rectangle, square, circle, oval triangle or a polygonal shape.The plate and plate heat exchanger as claimed in claim 1, wherein the plate and plate heat exchanger (1000) optionally comprises at least one feed preheating unit (80), at least one feed preheating unit (80) is connected in series with at least one integrated condensation-evaporation unit (70a, 70b), wherein the at least one feed preheating unit (80) comprises:two preheat configuration plates (500, 600) at a front end and a rear end, comprising a first preheat configuration plate (600) and a second preheat configuration plate (500);two condensation plates (200c, 200d) placed between two preheat configuration plates (500, 600), comprising a third condensation plate (200c) and a fourth condensation plate (200d); andat least one preheat frame (700) placed between two condensation plates (200c, 200d).wherein the first preheat configuration plate (600) receives the first vapor (25) and passes the first vapor (25) through two condensation plates (200c, 200d), at least one preheat frame (700) and through condensation channels (40c, 40d), formed between the first preheat configuration plate (600) and the third condensation plates (200c) and between the at least one preheat frame (700) and the fourth condensation plates (200d) respectively, thereby forming the distillate (16) by condensing the first vapor (25) in condensation channels (40c, 40d);the second preheat configuration plate (500) receives the first feed (13) and passes the first feed (13) through the two condensation plates (200c, 200d), at least one preheat frame (700), and through the feed preheating channels (90a, 90b) formed between the second preheat configuration plate (500) and the fourth condensation plates (200d) and between the at least one preheat frame (700) and the third condensation plates (200c) respectively, and preheats the first feed (13) with the condensation heat of the first vapor (25) transferred via the condensation plates thereby forming the first hot feed (13a) in the feed preheating channels (90a, 90b);wherein the second preheat configuration plate (500) outputs the distillate (16), the second vapor (26) and the first hot feed (13a).The plate and plate heat exchanger as claimed in claim 7, wherein each condensation plate (200c, 200d) of the at least one feed preheating unit (80) is made in a same configuration as the condensation plate of the at least one integrated condensation-evaporation unit (70a, 70b).The plate and plate heat exchanger as claimed in claim 7, wherein the first preheat configuration plate (600) comprises:the first vapor through hole (7) on an upper edge receiving and passing the first vapor (25),the second vapor through hole (8) on the upper edge receiving and passing the second vapor (26),the second feed through hole (5) on a lower edge receiving and passing the concentrate (13b) being the second feed, andthe distillate through hole (9) on the lower edge receiving and passing the distillate (16).The plate and plate heat exchanger as claimed in claim 7, wherein the second preheat configuration plate (500) comprisesthe second vapor through hole (8) on the upper edge receiving and passing the second vapor (26),the second feed through hole (5) on a lower edge receiving and passing the concentrate (13b) being the second feed, andthe distillate through hole (9) on the lower edge receiving and passing the distillate (16).The plate and plate heat exchanger as claimed in claim 10, wherein the second preheat configuration plate (500) is made in a same configuration as the second configuration plate (400a) of the integrated condensation-evaporation unit (70a, 70b).The plate and plate heat exchanger as claimed in claim 10, wherein the second preheat configuration plate (500) comprises a preheating feed through hole (10) on the lower edge positioned below the distillate through hole (9), for receiving and passing the first feed (13).The plate and plate heat exchanger as claimed in claim 7, wherein each condensation plate (200c, 200d) and each preheat frame (700) further comprises the preheating feed through hole (10) on the lower edge positioned below the distillate through hole (9) for passing the first feed (13).The plate and plate heat exchanger as claimed in claim 7, wherein each condensation plate (200c, 200d), each preheat frame (700) and the first preheat configuration plate (600) comprises at least one central preheating through hole (11) on the upper edge above an area between the first vapor through hole (7) and the second vapor through hole (8) for passing the first hot feed (13a), wherein at least one central preheating through hole (11) has a diameter smaller than the diameters of the first vapor through hole (7) and the second vapor through hole (8).The plate and plate heat exchanger as claimed in claim 7, wherein each configuration plate (300a, 400a), each condensation plate (200a, 200b) and each level control and evaporation plates (100a, 100b) comprises at least one central preheating through hole (11), configured as same as the central preheating through hole (11) of the condensation plates (200c, 200d) of the feed preheating unit (80) for passing the first hot feed (13a).The plate and plate heat exchanger as claimed in claim 7, wherein at least one preheat frame (700) is made in a same configuration as the condensation plate of the at least one feed preheating unit (80).The plate and plate heat exchanger as claimed in claim 7, wherein the second configuration plate (400a) further comprises the first vapor through hole (7) on the upper edge receiving and passing the first vapor (25) to the at least one feed preheating unit (80).A plate and plate heat exchanger (1000) for an integrated condensation and evaporation comprising a plurality of integrated condensation-evaporation units (70) and a plurality of feed preheating units (80), wherein at least one integrated condensation-evaporation unit (70) comprising a stack of plates as claimed in claim 1, is connected in series with each feed preheating unit.A method for generating at least one effect of an integrated evaporation and condensation, comprising:receiving and passing a first vapor (25) through vapor through holes (7) of a first configuration plate (300a) and a first condensation plate (200a) in at least one integrated condensation-evaporation unit (70a, 70b);condensing the first vapor (25) in a first condensation channel (40a) formed between the first configuration plate (300a) and the first condensation plate (200a), thereby forming a distillate (16);passing a first hot feed (13a) through first feed through holes (4) of the first configuration plate (300a), the first condensation plate (200a) and a first level control and evaporation plate (100a) in at least one integrated condensation-evaporation unit (70a, 70b);flashing the first hot feed (13a) in a first evaporation channel (50a) formed between the first condensation plate (200a) and the first level control and evaporation plate (100a), thereby forming a second vapor (26);forming a concentrate (13b) from at least partially concentrated first hot feed (13a) in a first concentrate channel (60) while the first hot feed (13a) gets evaporated in the first evaporation channel (50a); andpassing the concentrate (13b) through the level control and concentrate passage holes (2) of the first level control and evaporation plate (100a) and a second level control and evaporation plate (100b); andpassing the first hot feed (13a) further through the first feed through holes (4) of the second level control and evaporation plate (100b) and a second condensation plate (200b),flashing the first hot feed (13a) in a second evaporation channel (50b) formed between the second level control and evaporation plate (100b) and the second condensation plate (200b), thereby forming the second vapor (26);passing the first vapor (25) through vapor through holes (7) of the second condensation plate (200b) in at least one integrated condensation-evaporation unit (70); andcondensing the first vapor (25) in a second condensation channel (40b) formed between the second configuration plate (400a) and the second condensation plate (200b), thereby forming the distillate (16);outputting the distillate (16), the second vapor (26) and the concentrate (13b) from the at least one configuration plate (400a).The method as claimed in claim 19, wherein the method further comprises the steps of:passing the distillate (16) from the condensation channels (40a, 40b) through distillate through-holes (9) respectively of the first condensation plate (200a), the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b) and the second configuration plate (400a), to outside or the at least one feed preheating unit (80);passing the second vapor (26) from the evaporation channels (50a, 50b) through second vapor through holes (8) respectively of the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b) and the second configuration plate (400a) to outside or the at least one feed preheating unit (80); andpassing the concentrate (13b) through second feed through holes (5) respectively of the second level control and evaporation plate (100b), the second condensation plate (200b) and the second configuration plate (400a) to outside or the at least one feed preheating unit (80).The method as claimed in claim 19, wherein the method further comprises the steps of:passing the first vapor (25) further through first vapor through holes (7) respectively of the first level control and evaporation plate (100a), the second level control and evaporation plate (100b), the second condensation plate (200b) and the second configuration plate (400a) to at least one feed preheating unit (80).The method as claimed in claim 19, wherein the method further comprises generating at least one effect of preheating, comprising the steps of:receiving and passing the first vapor (25) through vapor through holes (7) of a first preheat configuration plate (600) and a third condensation plate (200c) in at least one feed preheating unit (80);condensing the first vapor (25) further in a third condensation channel (40c) formed between the first preheat configuration plate (600) and the third condensation plate (200c), thereby forming the distillate (16);receiving and passing the first vapor (25) through vapor through holes (7) of the at least one preheat frame (700) and a fourth condensation plate (200d) in at least one feed preheating unit (80); andcondensing the first vapor (25) in a fourth condensation channel (40d) formed between at least one preheat frame (700) and the fourth condensation plate (200d), thereby forming the distillate (16);receiving and passing a first feed (13) through a preheating feed through holes (10) of a second preheat configuration plate (500) and the fourth condensation plate (200d) in at least one feed preheating unit (80); andpreheating the first feed (13) with the condensation heat of the first vapor (25) transferred via the fourth condensation plate (200d), in a first feed preheating channel (90a) formed between the second preheat configuration plate (500) and the fourth condensation plate (200d), thereby forming a first hot feed (13a);receiving and passing the first feed (13) through the preheating feed through holes (10) of at least one preheat frame (700) and the third condensation plate (200c) in at least one feed preheating unit (80); andpreheating the first feed (13) with the condensation heat of the first vapor (25) transferred via the third condensation plate (200c), in a second feed preheating channel (90b) formed between preheat frame (700) and the third condensation plate (200c), thereby forming the first hot feed (13a);passing the first hot feed (13a) through the central preheating through holes (11) of the first preheat configuration plate (600); andoutputting the distillate (16), the second vapor (26) and the concentrate (13b) in the second preheat configuration plate (500)The method as claimed in claim 19, wherein the method further comprises generating at least one effect of preheating, comprising the steps of:passing the first hot feed (13a) through at least one central preheating through holes (11) of the stack of plates of at least one integrated condensation-evaporation unit (70a, 70b); andfeeding back the first hot feed (13a) as an input to the first feed through holes (4) of stack of plates of at least one integrated condensation-evaporation unit (70a, 70b);wherein at least one feed preheating unit (80) is connected in series with at least one integrated condensation-evaporation unit (70a, 70b).Dated thison21stday of January 2026MAHUA ROY CHOWDHURYIN / PA - 496(Authorized Patent Agent for the Applicant)

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