Deoxidizing mechanism, preheating deoxidizing device, steam generator and air conditioning unit

Abstract

The invention discloses a deoxidizing mechanism, a preheating deoxidizing device, a steam generator and an air conditioning unit. The deoxidizing mechanism comprises a cylindrical water segregator shell with an opening in the lower end, a pipeline structure which surrounds the water segregator shell and conveys water into the water segregator shell, a middle water separating mechanism arranged in the water segregator shell and an inner water separating mechanism arranged in an inner cavity of the middle water separating mechanism; when the input water quantity is small, the pipeline structure enables the input water to disperse and flow down along the inner wall of the water segregator shell; when the input water amount is large, the pipeline structure can enable the input water to flow down along the circumferential outer surface of the middle water dividing mechanism in a dispersed mode. And when the input water quantity is maximum, the pipeline structure can also enable the input water to enter the middle water dividing mechanism and to be dispersed and flow down by the inner water dividing mechanism. According to the preheating deoxidizing device, the technical defects of an existing steam generator are effectively overcome, the problem of oxidation corrosion of equipment is solved, and the safety and energy efficiency of a unit are improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more particularly to a deoxygenation mechanism, a preheating deoxygenation device including the deoxygenation mechanism, a steam generator using the preheating deoxygenation device, and an air conditioning unit using the steam generator. Background Technology

[0002] Shell-and-tube steam generators are key heat exchange devices in industrial production, and their main function is to convert water into steam by heating. The core structure of this equipment includes a large outer shell and an internal piping system in which the working medium (such as refrigerant or high-temperature flue gas) flows inside the pipes, transferring heat with the external water to complete the water evaporation process.

[0003] Originating in the Industrial Revolution, this type of equipment has evolved alongside advancements in steam power technology and now plays a vital role in numerous industries. Its operation relies on heat conduction and convection, finding significant applications in power generation, chemical processing, papermaking, and food processing. In recent years, to meet increasingly stringent energy efficiency standards and environmental protection requirements, shell-and-tube steam generators have undergone continuous technological improvements, moving towards higher thermal efficiency, lower energy consumption, and greater safety and reliability.

[0004] In practical industrial applications, due to manufacturing costs and production process constraints, the water input into the steam generator typically carries a certain amount of dissolved oxygen. As the water temperature rises, this dissolved oxygen is gradually released. If the concentration is too high, it will cause severe oxidative corrosion damage to components such as the heat exchanger's tube sheet and shell, especially at welded joints that isolate the inside and outside of the tube sheet and shell. This corrosion can pose significant safety risks. Currently, most shell-and-tube steam generators lack dedicated deaeration facilities, and even those that are equipped often borrow designs from traditional boiler deaeration systems. However, deaeration equipment in conventional boilers is mostly independently installed, large in size, and difficult to integrate into shell-and-tube equipment. Furthermore, some deaeration methods, such as water-spraying disc or spray-packed deaerators, require additional heat energy to operate, which actually reduces the overall system's energy efficiency.

[0005] Existing steam generators with built-in deaerators introduce heat from the gaseous refrigerant on the pipe side to preheat the water. However, they neglect the impact of the liquid refrigerant condensing from heat exchange with the water entering the heat exchange tubes on the gas-phase condensation heat exchange effect. At this time, the liquid refrigerant will form a liquid film with the tube wall, increasing the thermal resistance of gaseous refrigerant condensation heat transfer, thereby reducing the overall heat exchange efficiency of the unit.

[0006] Another type of steam generator has a built-in deaerator. Its box-shaped structure allows water to flow out directly and exchange heat directly with steam for deaeration. Because the water flows out in a columnar shape, its surface thermal resistance is high, making it difficult to effectively heat the water. Especially when the heat exchanger needs to be adapted to high-flow-rate conditions with high water velocity, the contact time with steam is greatly shortened, resulting in a shorter water heating time and even worse deaeration performance.

[0007] Therefore, overcoming the shortcomings of poor water deoxygenation efficiency and reduced overall heat exchange efficiency in existing steam generators is a technical problem that needs to be solved in this field. Summary of the Invention

[0008] In order to solve the technical problems of poor water deoxygenation efficiency and reduced overall heat exchange efficiency of existing steam generators, this invention proposes a deoxygenation mechanism, a preheating deoxygenation device including the deoxygenation mechanism, a steam generator using the preheating deoxygenation device, and an air conditioning unit using the steam generator.

[0009] To address the aforementioned problems, this invention proposes a deoxygenation mechanism, characterized by comprising a cylindrical water distributor housing with an open lower end, a circumferential water-carrying pipe structure surrounding the water distributor housing, a central water-dividing mechanism disposed inside the water distributor housing, and an inner water-dividing mechanism disposed within the inner cavity of the central water-dividing mechanism; when the input water volume is small, the pipe structure causes the input water to disperse and flow down along the inner wall of the water distributor housing; when the input water volume is large, the pipe structure also causes the input water to disperse and flow down along the circumferential outer surface of the central water-dividing mechanism; when the input water volume is maximum, the pipe structure also causes the input water to enter the interior of the central water-dividing mechanism and disperse and flow down along the surface of the inner water-dividing mechanism.

[0010] The deoxygenation mechanism provided by this invention can ensure deoxygenation efficiency under different inlet water flow rates. That is, oxygenated water with different flow rates can be sprayed onto the water distribution structure at different positions to disperse the water flow and spread the liquid film, thereby increasing the heat exchange area and intensity of water and water vapor, and thus promoting the precipitation of dissolved oxygen in the water flow.

[0011] Preferably, the piping mechanism includes an annular water distribution pipe and a support ring disposed on the lower side of the water distributor housing, and a water distributor inlet pipe communicating with the annular water distribution pipe; multiple water distribution bends surrounding the water distributor housing connect the annular water distribution pipe to the water distributor housing; and further includes a water distribution mechanism that controls the water to flow down along the inner wall of the water distributor housing when the input water volume is small.

[0012] The aforementioned piping mechanism allows the input water to enter along the circumference of the cylindrical structure of the distributor shell, facilitating the flow and dispersion of water inside the distributor shell.

[0013] Preferably, the water distribution mechanism includes a semi-circular groove for diverting water into the lower side of a water distribution bend extending into the water distributor housing, and a portion of the upper edge of a water distribution baffle rising into the water distribution bend through the semi-circular groove to form an overflow weir, while the lower part of the water distribution baffle abuts against the inner wall of the water distributor housing.

[0014] The purpose of the water distribution mechanism is to install a water-distributing baffle inside the pipe at one end of the water-distributing bend outlet to form an overflow weir structure. When the input water volume is small, it can block the water, allowing it to flow down along the gap between the semi-circular groove and the water-distributing baffle, along the inner wall of the water-distributing baffle and the distributor housing, for initial dispersion and spreading. When the input water volume is large, the water flow can overflow the overflow weir and flow out from the outlet of the water-distributing bend.

[0015] Preferably, the water distributor housing is formed by connecting an upper elliptical shell and a lower cylindrical shell, and the water distribution bend is arranged in a ring along the connection between the elliptical shell and the cylindrical shell.

[0016] This structure allows the lower half of the water distribution baffle that rises into the water distribution bend to easily fit against the inner wall of the water distributor housing, which allows the water flowing down the water distribution baffle to spread and form a film better on the inner wall of the water distributor housing.

[0017] Preferably, the middle water distribution mechanism includes a water distribution plate located below the outlet of the water distribution bend, a hollow water distribution column connected to the inner wall of the top of the water distributor housing, and a water inlet hole circumferentially arranged on the hollow water distribution column at a height corresponding to the outlet of the water distribution bend.

[0018] When the input water flow rate is large, in addition to the water flowing down along the baffle plate undergoing the first water flow dispersion, the water jetting from the outlet of the water distribution bend reaches the surface of the hollow water distribution column of the central water distribution mechanism and flows downwards, merging with the water falling on the surface of the water distribution plate below. Simultaneously, it flows towards the outer diameter of the water distribution plate, thus undergoing a second water flow dispersion. Finally, the dispersed water flows downwards through the circumferential gap between the water distribution plate and the inner wall of the water distributor housing.

[0019] Preferably, the upper surface of the water distribution plate has triangular water distribution protrusions distributed in concentric circles, with the inclined surface of the triangular water distribution protrusions facing the center of the circle.

[0020] Triangular water-distributing protrusions arranged in concentric circles are installed on the surface of a large water distribution plate, with their inclined surfaces facing the center of the circles. This arrangement allows for more efficient dispersion and distribution of water flow.

[0021] Preferably, the inner cavity of the hollow water-dividing column is truncated cone-shaped, and the internal water-dividing mechanism includes a water-dividing plate located below the water inlet of the hollow water-dividing column. A column connects the water-dividing plate to the top of the inner cavity of the hollow water-dividing column, and a circumferential gap B is left between the circumferential of the water-dividing plate and the side wall of the inner cavity of the hollow water-dividing column.

[0022] When the input water flow is at its maximum, in addition to continuing the first two water flow dispersion and spreading, the water jet from the outlet of the water distribution bend can also enter through the water inlet on the hollow water distribution column and spray onto the water distribution plate and connecting column surface of the inner water distribution mechanism for a third water flow dispersion and spreading. Finally, the dispersed water flows downward through the circumferential gap between the water distribution plate and the inner wall of the hollow water distribution column of the middle water distribution mechanism.

[0023] This invention discloses a preheating and deoxygenation device, characterized in that it includes the deoxygenation mechanism described in this invention and a preheating mechanism for input water. Room temperature oxygenated water enters the condenser of the preheating mechanism and exchanges heat with the high temperature gas entering the preheating mechanism to raise its temperature. The outlet of the preheating mechanism is connected to the inlet of the deoxygenation mechanism.

[0024] Room temperature oxygenated water enters the preheating mechanism and exchanges heat with the high temperature gas entering the preheating mechanism. The room temperature oxygenated water is heated to become preheated water, which is then fed into the deoxygenation mechanism and flows through the three-stage liquid separation structure to be dispersed and thinned three times, so as to exchange heat with water vapor again and further release dissolved oxygen.

[0025] Preferably, the preheating mechanism includes a heat exchange box, a condenser tube assembly arranged horizontally inside the heat exchange box, an air inlet on the rear cover plate of the heat exchange box, a liquid guide pipe on the bottom plate of the heat exchange box, a water inlet box and a water inlet pipe on one side of the heat exchange box, and a water outlet box and a water outlet pipe on the other side of the heat exchange box, wherein the water outlet pipe is connected to the water inlet pipe of the water distributor of the deaeration mechanism.

[0026] Room temperature oxygenated water flows through the condenser tube assembly in the preheating mechanism and exchanges heat with high-temperature gas entering through the air inlet of the rear cover of the heat exchange box, raising the room temperature oxygenated water to preheated water. The multiple condenser tubes in the condenser tube assembly can increase the heat exchange area and improve the heat exchange effect.

[0027] Preferably, the lower side of the outer surface of the air inlet is provided with a hemispherical liquid-blocking structure, and the upper side of the hemispherical liquid-blocking structure has a notch.

[0028] To prevent liquid generated on the surface of the condenser tubes inside the preheating mechanism from splashing out through the air inlet on the rear cover, a hemispherical liquid-blocking structure is provided. This liquid-blocking structure has a partial notch on its upper side, which allows splashed liquid to flow back and also allows high-temperature gas to enter the preheating mechanism from this notch. Simultaneously, as the high-temperature gas enters through this notch, it can further blow any splashed liquid into the preheating mechanism.

[0029] Preferably, the inner surface of the base plate is provided with a liquid guiding groove, and the upper end of the liquid guiding pipe is connected to the bottom surface of the liquid guiding groove.

[0030] A liquid guiding groove is provided on the inner surface of the base plate, and the upper end of the liquid guiding pipe is made as flush as possible with the bottom surface of the liquid guiding groove. This ensures that all the liquid generated after the high-temperature gas condenses can enter the liquid guiding groove and be discharged completely. It also maintains a liquid seal state in the liquid guiding groove for the liquid guiding pipe opening, preventing gas from flowing directly into the drain pipe of the steam generator through the liquid guiding pipe. This ensures that there is no gas leakage between the heat exchange process on the refrigerant side of the steam generator and the condensation and drainage process.

[0031] Preferably, the pipe holes of the inlet pipe and the outlet pipe do not overlap with the lateral projection positions of the pipe holes of the condenser pipes on both sides of the heat exchange box.

[0032] The lateral projections of the inlet and outlet pipes on both sides of the inlet and outlet pipe box should not be directly aligned with the inlets of the condenser tubes in the heat exchanger. This ensures that the oxygenated water entering the inlet pipe box from the inlet pipe is diverted to the surrounding areas due to frontal resistance, resulting in a more uniform water flow into the condenser tubes and guaranteeing the heat exchange intensity within the condenser tubes, i.e., ensuring the average temperature of the water exiting each condenser tube is the same. Simultaneously, the preheated water flowing out of the condenser tubes is mixed within the outlet pipe box due to resistance before being output. This results in low temperature stratification of the output water, providing uniformly heated preheated water for the deaeration unit.

[0033] The present invention also provides a steam generator, characterized in that it includes a shell, heat exchange tubes disposed within the shell, a tube box assembly disposed at one end of the shell, a refrigerant inlet pipe communicating with an air inlet chamber within the tube box assembly, and a refrigerant drain pipe communicating with a drain chamber within the tube box assembly; it also includes the preheating and deoxygenation device described in the present invention, wherein the preheating mechanism is disposed within the air inlet chamber of the tube box assembly, and the deoxygenation mechanism is disposed on the heat exchange tubes; the rear cover plate of the preheating mechanism faces the outer end side of the tube box assembly, the water inlet pipe of the preheating mechanism is connected to an external water source, and the water outlet pipe of the preheating mechanism is connected to the water inlet pipe of the water distributor of the deoxygenation mechanism.

[0034] This invention proposes a steam generator with a fluorine-side preheating mechanism and a water-side deoxygenation mechanism. The high-temperature gaseous refrigerant input from the fluorine side of the heat exchanger preheats the oxygen-containing water in the preheating mechanism inside the pipe box assembly. Simultaneously, the liquid refrigerant generated by the condensation of the gaseous refrigerant after heat exchange is discharged through the refrigerant drain pipe of the steam generator. The preheated oxygen-containing water is input into the deoxygenation mechanism located inside the steam generator. By inputting oxygen-containing water at different flow rates, it can be sprayed onto the water distribution structure at different locations, dispersing the water flow and spreading the liquid film to increase the heat exchange area and intensity between the water and the internal water vapor, thereby promoting the precipitation of dissolved oxygen in the water flow.

[0035] The present invention also provides an air conditioning unit, which includes the steam generator described in the present invention.

[0036] The high-temperature gaseous refrigerant input from the refrigerant side of the heat exchanger preheats the oxygenated water, avoiding the need for an external heat source in some heat exchanger systems, which reduces system efficiency. The semi-enclosed preheating mechanism effectively separates the gaseous refrigerant within the tube assembly from the liquid refrigerant condensed within the preheating mechanism, preventing increased thermal resistance caused by liquid refrigerant condensation on the inner wall of the heat exchange tubes. The deoxygenation mechanism can meet deoxygenation requirements under different inlet flow rates, promoting dissolved oxygen precipitation in the oxygenated water. This invention effectively solves the problem of poor deoxygenation in existing shell-and-tube steam generators, leading to oxygen oxidation and corrosion of the equipment. It improves deoxygenation under different water flow conditions, enhances the energy efficiency of the heat exchanger and its system, and achieves safer and more efficient integrated operation of the unit. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the steam generator of the present invention;

[0038] Figure 2 This is a three-dimensional schematic diagram of the deoxygenation mechanism of the present invention;

[0039] Figure 3 This is a cross-sectional schematic diagram of the deoxygenation mechanism of the present invention;

[0040] Figure 4 for Figure 3 3D sectional view of the central water distributor;

[0041] Figure 5 for Figure 3 A front sectional view of the central water distributor;

[0042] Figure 6 for Figure 5 A magnified view of a section at point A in the middle;

[0043] Figure 7 This is a schematic diagram of the water distribution bend structure in the deoxygenation mechanism;

[0044] Figure 8 This is a perspective view of the preheating mechanism of the present invention;

[0045] Figure 9 This is a cross-sectional view of the preheating mechanism of the present invention;

[0046] Figure 10 for Figure 9 A cross-sectional view along the CC direction;

[0047] Figure 11 This is a sectional view of the rear cover plate of the preheating mechanism;

[0048] Figure 12This is a three-dimensional schematic diagram of the base plate of the preheating mechanism.

[0049] Figure descriptions: 1-Left water chamber assembly, 2-Left tube sheet, 3-Water vapor exhaust pipe, 4-Baffle plate, 5-Shell, 6-Filter assembly, 7-Right tube sheet, 8-Refrigerant inlet pipe, 9-Tube box assembly, 11-Refrigerant drain pipe, 12-Support block, 13-Connecting pipe, 15-Support plate assembly, 16-Heat exchange tube, 17-Baffle plate; 10-Preheating mechanism, 101-Water inlet pipe, 102-Water inlet pipe box, 103-Heat exchange box, 1031-Horizontal projection position of water inlet and outlet pipes on both sides of the heat exchange box, 104-Water outlet pipe box, 105-Water outlet pipe, 106-Liquid guide pipe, 107-Bottom plate, 1071-Liquid guide groove, 108-Rear cover, 1081-Air inlet, 1082-Hemispherical liquid baffle structure, 1083-Notch, 109-Condenser tube assembly;

[0050] 14-Deoxygenation mechanism, 141-Water device housing, 142-Water distribution bend, 1421-Semi-circular groove, 143-Annular water distribution pipe, 144-Support ring, 145-Water distributor inlet pipe, 146-Water distribution baffle, 147-Water distribution plate, 1471-Triangular water distribution protrusion, 148-Hollow water distribution column, 1481-Water inlet hole, 149-Water distribution plate. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the invention and do not constitute a limitation thereof.

[0052] Please refer to Figure 2 , Figure 3 As shown, an embodiment of the deoxygenation mechanism 14 proposed in this invention includes a cylindrical water distributor housing 141 with an open lower end, a pipe structure surrounding the water distributor housing and supplying water therein, a central water-dividing mechanism disposed inside the water distributor housing, and an inner water-dividing mechanism disposed within the inner cavity of the central water-dividing mechanism. When the input water volume is small, the pipe structure causes the input water to flow down along the inner wall of the water distributor housing; when the input water volume is large, the pipe structure also causes the input water to flow down along the circumferential outer surface of the central water-dividing mechanism; when the input water volume is maximum, the pipe structure also causes the input water to enter the interior of the central water-dividing mechanism and flow down along the surface of the inner water-dividing mechanism.

[0053] In this embodiment, as Figure 2 , Figure 3As shown, the piping mechanism includes an annular water distribution pipe 143 and a support ring 144 located on the lower side of the distributor housing 141, and a distributor inlet pipe 145 connected to the annular water distribution pipe 143; multiple water distribution bends 142 surrounding the distributor housing 141 connect the annular water distribution pipe 143 to the distributor housing 141. It also includes a water distribution mechanism that controls the water to flow down the inner wall of the distributor housing 141 when the input water volume is small.

[0054] like Figure 3 , Figure 7 As shown, the water distribution mechanism includes a diversion semi-circular groove 1421 opened on the lower side of a diversion bend 142 extending into the water distributor housing 141. The arc of this semi-circular groove can be 120°-180° as needed. A portion of the upper edge of a diversion baffle 146 extends into the diversion bend 142 from the semi-circular groove 1421, forming an overflow weir structure, while the lower part of the diversion baffle 146 abuts against the inner wall of the water distributor housing 141. Please refer to... Figure 4 Preferably, the water distributor housing 141 is formed by connecting an upper elliptical spherical housing and a lower cylindrical housing, with the water distribution bend 142 arranged circumferentially along the connection point of the elliptical spherical housing and the cylindrical housing. This arrangement allows the lower part of the water distribution baffle 146 extending into the water distribution bend 142 to easily conform to the inner wall of the water distributor housing 141, so that the water flowing down along the water distribution baffle 146 can be dispersed and spread on the inner wall of the water distributor housing, resulting in a better film formation effect.

[0055] The deoxygenation mechanism 14 provided by this invention can ensure deoxygenation efficiency under different inlet water flow rates. That is, oxygenated water of different flow rates can be sprayed onto the water distribution structure at different positions, dispersing the water flow and spreading the liquid film to increase the heat exchange area and intensity between water and water vapor, thereby promoting the precipitation of dissolved oxygen in the water flow. The pipeline mechanism allows the input water to enter along the circumference of the water distributor shell 141, facilitating water flow and dispersion inside the water distributor shell. The water distribution mechanism has a water distribution baffle 146 installed inside the outlet end of the water distribution bend 142 extending into the water distributor shell to form an overflow weir structure. When the water flow rate into the deoxygenation mechanism 14 is small, the water level in the water distribution bend 142 is lower than that of the water distribution baffle 146. The water encounters resistance and flows down along the gap between the semi-circular groove 1421 and the water distribution baffle 146, along the water distribution baffle and the inner wall of the water distributor shell, for the first dispersion and spreading. This increases the surface area for heating water vapor, accelerating the release of dissolved oxygen. When the input water volume is large, the water flow can overflow the overflow weir and flow out through the outlet of the water distribution bend 142.

[0056] like Figure 4 , Figure 5 , Figure 6As shown, the central water-dividing mechanism includes a water-dividing plate 147 horizontally located below the outlet of the water-dividing bend 142, a hollow water-dividing column 148 connecting the inner top wall of the water-dividing housing 141 to the center of the water-dividing plate 147, and a water inlet hole 1481 circumferentially arranged on the hollow water-dividing column at a height corresponding to the outlet of the water-dividing bend 142. The upper surface of the water-dividing plate 147 has concentric triangular water-dividing protrusions 1471, with the inclined surface of the triangular protrusions facing the center of the water-dividing plate. The inner cavity of the hollow water-dividing column 148 is truncated cone-shaped. The internal water-dividing mechanism includes a water-dividing plate 149 horizontally located below the water inlet hole 1481 of the hollow water-dividing column 148. A column connects the top of the inner cavity of the hollow water-dividing column 148 to the center of the water-dividing plate 149, with a circumferential gap B between the circumferential of the water-dividing plate 149 and the side wall of the inner cavity of the hollow water-dividing column 148.

[0057] When the input water flow rate is large, in addition to the water flowing down along the water-distributing baffle 146 continuing for the first water flow dispersion and spreading, the water sprayed out through the outlet of the water-distributing bend 142 reaches the surface of the hollow water-distributing column of the central water-distributing mechanism and flows downwards, merging with the water falling onto the surface of the water-distributing plate 147 below, thus undergoing a second water flow dispersion and spreading. Finally, the dispersed water flows downwards through the circumferential gap between the water-distributing plate and the inner wall of the water distributor housing. Triangular water-distributing protrusions 1471 are arranged in concentric circles on the surface of the large-area water-distributing plate 147, with the inclined surface of the water-distributing protrusions facing the center of the water-distributing plate. The triangular water-distributing protrusions can further disrupt the liquid film and enhance the flow disturbance. This arrangement can more efficiently disperse and spread the water flow, thereby increasing the heating area of ​​the liquid film and water vapor and accelerating the precipitation of dissolved oxygen.

[0058] When the input water flow rate is at its maximum, in addition to continuing the first two stages of water flow dispersion and spreading, the water jetting out from the outlet of the water distribution bend 142 can also enter through the inlet hole 1481 on the hollow water distribution column and spray onto the surface of the water distribution plate 149 and its connecting column of the inner water distribution mechanism for a third stage of water flow dispersion and spreading. Finally, the dispersed water flows downward through the circumferential gap between the water distribution plate 149 and the inner wall of the hollow water distribution column 148 of the middle water distribution mechanism and flows out. Ultimately, this increases the heating area of ​​the liquid film and water vapor, thereby accelerating the precipitation of dissolved oxygen.

[0059] The deoxygenation mechanism 14 of this invention can ensure deoxygenation efficiency under different inlet water flow rates. By adding water distribution structures and spreading liquid films at the locations reachable by water sprayed at different flow rates, the heat exchange area and intensity between water and water vapor are increased, thereby promoting dissolved oxygen precipitation. This solves the problem of current built-in deoxygenators using a box-shaped structure, where water flows out directly and water vapor directly exchanges heat for deoxygenation. Because the water flows out in a columnar shape, the surface thermal resistance is large, making it impossible to effectively heat the water. Especially when the heat exchanger needs to adapt to high flow rate conditions, the water flow velocity is fast, and the contact time with steam is greatly shortened, resulting in a short water heating time and a poorer deoxygenation effect.

[0060] like Figure 1 , Figure 3 , Figure 8 and Figure 9 As shown, this invention discloses an embodiment of a preheating deoxygenation device, which includes a deoxygenation mechanism 14 as described in this invention and a preheating mechanism 10 for inputting oxygenated water. The outlet pipe 105 of the preheating mechanism 10 is connected to the inlet pipe 145 of the water distributor of the deoxygenation mechanism 14 via a connecting pipe 13. The preheating mechanism 10 includes a heat exchange box 103, a condenser tube assembly 109 arranged horizontally within the heat exchange box, and an air inlet 1081 located on the upper half of the rear cover plate 108 of the heat exchange box (please refer to...). Figure 11 The heat exchanger 103 includes a liquid guide pipe 106 located on the bottom plate 107; an inlet water pipe box 102 and an inlet water pipe 101 located on the right side of the heat exchanger 103; and an outlet water pipe box 104 and an outlet water pipe 105 located on the left side of the heat exchanger. The outlet water pipe is connected to the water distributor inlet water pipe 145 of the deaeration mechanism 14. Please refer to... Figure 11 A hemispherical liquid-blocking structure 1082 is provided on the lower side of the outer surface of the air inlet 1081 on the rear cover plate 108, and the upper side of the hemispherical liquid-blocking structure has a notch 1083.

[0061] Room temperature oxygenated water enters the preheating mechanism 10 and exchanges heat with the high-temperature gaseous refrigerant inside the heat exchange box 103 through the air inlet 1081 on the rear cover. The room temperature oxygenated water is heated to preheated water, which is then fed into the deoxygenation mechanism 14 and flows through a three-stage liquid separation structure to be dispersed and thinned three times, so as to exchange heat with water vapor again to further precipitate dissolved oxygen. The room temperature oxygenated water flows through the condenser tube assembly 109 in the preheating mechanism 10 and exchanges heat with the incoming high-temperature gaseous refrigerant. The multiple condenser tubes of the condenser tube assembly can increase the heat exchange area and improve the heat exchange effect.

[0062] To prevent liquid refrigerant generated on the surface of the condenser tubes inside the preheating mechanism 10 from splashing out from the air inlet 1081 on the rear cover, a hemispherical liquid-blocking structure 1082 is provided. This liquid-blocking structure has a partial notch 1083 on its upper side, which allows splashed liquid to flow back and also allows high-temperature gaseous refrigerant to enter the interior of the preheating mechanism through this notch. Simultaneously, as the high-temperature gas enters the heat exchanger through this notch, it can further blow any potentially splashed liquid refrigerant into the interior of the preheating mechanism.

[0063] like Figure 12 As shown, a liquid guiding groove 1071 is provided on the inner surface of the bottom plate 107 of the heat exchanger. The upper end of the liquid guiding pipe 106 is connected to the bottom surface of the liquid guiding groove 1071 at approximately the same level, meaning that the height of the upper end of the liquid guiding pipe 106 does not exceed the bottom surface of the liquid guiding groove 1071 as much as possible. The liquid guiding groove is provided on the inner surface of the bottom plate 107 of the heat exchanger, and the upper end of the liquid guiding pipe 106 is made as flush as possible with the bottom surface of the liquid guiding groove. This ensures that all the liquid generated after the high-temperature gas condenses can enter the liquid guiding groove and be drained completely. It also maintains a liquid seal in the liquid guiding groove 1071 for the opening of the liquid guiding pipe 106, preventing gas from directly flowing into the drain pipe 11 of the steam generator through the liquid guiding pipe 106. This ensures that there is no gas leakage between the heat exchange process on the refrigerant side of the steam generator and the condensation and drainage process.

[0064] like Figure 10 As shown, the lateral projection positions of the inlet pipe 101 of the inlet pipe box, the outlet pipe 105 of the outlet pipe box, and the condenser pipe of the heat exchange box 103 do not overlap. That is, the lateral projections of the inlet and outlet pipes on both sides of the inlet and outlet pipe boxes should not be directly opposite the openings of the condenser pipes in the heat exchange box 103. This ensures that the oxygenated water entering the inlet pipe box 102 from the inlet pipe 101 is diverted to the surrounding areas due to frontal resistance, making the water flow into the condenser pipes as uniform as possible, ensuring the heat exchange intensity within the condenser pipes, i.e., the average temperature of the water exiting each condenser pipe is the same. Simultaneously, the preheated water flowing out of the condenser pipes is mixed within the outlet pipe box 104 due to resistance before being output. Thus, the temperature stratification of the output water is low, providing uniformly heated preheated water for the deaeration mechanism 14.

[0065] like Figure 1As shown, an embodiment of a steam generator provided by the present invention includes: a left water chamber assembly 1, a left tube sheet 2, a steam exhaust pipe 3, a baffle plate 4, a housing 5, a filter assembly 6, a right tube sheet 7, an air inlet pipe 8, a tube box assembly 9, a preheating mechanism 10, a drain pipe 11, a support block 12, a connecting pipe 13, a deaeration mechanism 14, a support plate assembly 15, and heat exchange tubes 16. The left tube sheet 2 and the right tube sheet 7 are respectively connected to the two sides of the housing 5. The left water chamber assembly 1 and the tube box assembly 9 are installed on the corresponding sides of the left tube sheet 2 and the right tube sheet 7. The heat exchange tube bundle 16 passes through the left and right tube sheets and is located in the lower part of the housing 5, and its installation strength is reinforced by the corresponding support plate assembly 15. The tube box assembly 9 is divided into an air inlet chamber and a drain chamber by a partition 17. The filter assembly 6 is installed inside the housing 5 and above the deaeration mechanism 14. The baffle plate 4 is installed on the upper side of the filter assembly 6 and is located near the lower part of the steam exhaust pipe 3 on the left side of the housing 5. The refrigerant inlet pipe 8 communicates with the upper air inlet chamber of the pipe box assembly 9, and the refrigerant drain pipe 11 communicates with the lower drain chamber of the pipe box assembly 9. The present invention provides a preheating and deoxygenation device, wherein the preheating mechanism 10 is located inside the air inlet chamber of the pipe box assembly 9, and the deoxygenation mechanism 14 is located on the support plate assembly 15 of the heat exchange tube 16 near the water inlet side. The preheating mechanism 10 is installed as close as possible to the right side of the pipe box assembly 9 as possible, away from the air inlet pipe 8. The rear cover plate 108 of the preheating mechanism 10 faces the outer end side of the pipe box assembly 9 to prevent gaseous refrigerant from flowing into the interior of the preheating mechanism 10 at a high velocity (the air inlet pipe velocity is approximately 10-20 m / s) through the air inlet hole of the rear cover plate 108, causing a large impact on the condenser tube and resulting in liquid refrigerant splashing out. The inlet pipe 101 of the preheating mechanism 10 is connected to an external water source, and the outlet pipe 105 of the preheating mechanism 10 is connected to the water inlet pipe 145 of the deaerator 14 via a connecting pipe 13. The connecting pipe 13 is located outside the shell 5, and a support block 12 for supporting the connecting pipe 13 is installed at the corresponding position on the right tube plate 7. The preheating mechanism 10 is fixedly installed by its external inlet pipe 101, outlet pipe 105, and tube box shell. Its lower end liquid guide pipe 106 passes through the partition 17 of the tube box assembly 9 to guide the liquid refrigerant generated by the condensation of the preheating mechanism 10 into the liquid refrigerant drain pipe 11 of the steam generator after heat exchange and discharge it. The preheating mechanism is basically a semi-enclosed space, which effectively separates the gaseous refrigerant in the steam generator tube box assembly 9 from the liquid refrigerant generated by condensation in the heat exchange box, avoiding the effect of increased thermal resistance of condensation heat exchange in the heat exchange tube 16 caused by this part of liquid refrigerant, thus reducing the unit's energy efficiency.

[0066] In actual operation, high-temperature gaseous refrigerant enters the tube box assembly 9 from the refrigerant inlet pipe 8 and then enters the heat exchange tube 16. Most of the gaseous refrigerant condenses and releases heat through the heat exchange tube, causing the water, after dissolved oxygen has been released by the deoxygenation mechanism 14, to boil and evaporate into water vapor. This vapor is then filtered through the filter assembly 6 and discharged from the water vapor exhaust pipe 3. Simultaneously, after two heat exchange processes, the gaseous refrigerant in the heat exchange tube condenses and liquefies, flowing out from the drain pipe 11 at the bottom of the tube box assembly 9. A portion of the gaseous refrigerant remaining in the air inlet chamber above the partition 17 in the tube box assembly 9 enters the preheating mechanism 10, condenses into liquid refrigerant on the surface of its condenser tube, and flows out from the liquid guide pipe 106 into the steam generator via the drain pipe 11.

[0067] This invention inputs room-temperature oxygenated water into the condenser tube assembly 109 of the preheating mechanism via the inlet pipe 101. The water absorbs heat released by the condensation of the high-temperature gaseous refrigerant entering the preheating mechanism 10, heating it to preheated water. This preheated water then enters the deoxygenation mechanism 14 via the outlet pipe and connecting pipe. It is dispersed and spread three times through a three-stage liquid distribution structure, further absorbing heat from the water vapor in the lower shell of the deoxygenation mechanism, thus releasing dissolved oxygen and effectively achieving preheating and deoxygenation. The preheating mechanism 10, located inside the tube box assembly 9, directly discharges the liquid refrigerant generated within it into the drain pipe 11 of the steam generator, overcoming the negative impact of liquid refrigerant entering the heat exchange tubes 16 on the condensation effect of the gaseous refrigerant in existing technologies. Furthermore, it utilizes the heat from the refrigerant side of the heat exchanger for preheating, solving the problem of reduced system energy efficiency caused by the need for an external heat source in some existing heat exchanger systems. Simultaneously, the proposed preheating and deoxygenation structure addresses the oxidation and corrosion problems caused by oxygen release in existing shell-and-tube steam generators lacking a deoxygenation device, improving unit safety.

[0068] The present invention also provides an air conditioning unit, which includes the steam generator described in the present invention.

[0069] It should be noted that the terminology used in this specification is for describing specific embodiments only and is not intended to limit the invention. Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the technical features and steps set forth in these embodiments do not limit the scope of protection of this invention.

[0070] Techniques, methods, and apparatus known to those skilled in the art are not discussed in detail herein, but where appropriate, such techniques, methods, and apparatus should be considered part of this specification. Any specific values ​​in this specification should be interpreted as merely exemplary and not as limiting the invention.

[0071] For ease of description, the terms used in the specification to describe position, such as "above", "to the left", "in front", etc., are only used to describe the spatial positional relationship between a component and other components in the embodiment shown in the figure. When the position of the component is different, the relative position will change. Therefore, the positional relationship of the embodiment in the figure should not be construed as limiting the present invention.

[0072] Furthermore, it should be noted that the use of terms such as "first" and "second" in the specification is merely for distinguishing similar components and does not imply any order of precedence. Therefore, it should not be construed as limiting the scope of protection of this invention.

[0073] The above description is merely a specific embodiment of the present invention. It should be noted that any modifications, equivalent substitutions, and variations made within the spirit and framework of the present invention should be included within the protection scope of the present invention.

Claims

1. An oxygen removal mechanism, characterized in that, The device includes a cylindrical water distributor housing with an open lower end, a pipe structure surrounding the water distributor housing for supplying water therein, a central water-dividing mechanism located inside the water distributor housing, and an inner water-dividing mechanism located within the inner cavity of the central water-dividing mechanism. When the input water volume is small, the pipe structure causes the input water to flow down along the inner wall of the water distributor housing. When the input water volume is large, the pipe structure also causes the input water to flow down along the circumferential outer surface of the central water-dividing mechanism. When the input water volume is maximum, the pipe structure also causes the input water to enter the interior of the central water-dividing mechanism and be dispersed down by the inner water-dividing mechanism.

2. The deoxygenation mechanism as described in claim 1, characterized in that, The piping mechanism includes an annular water distribution pipe and a support ring located on the lower side of the water distributor housing, and a water distributor inlet pipe connected to the annular water distribution pipe; multiple water distribution bends surrounding the water distributor housing connect the annular water distribution pipe to the water distributor housing; and a water distribution mechanism that controls the water to flow down the inner wall of the water distributor housing.

3. The deoxygenation mechanism as described in claim 2, characterized in that, The water distribution mechanism includes a semi-circular groove for diverting water into the lower side of a water distribution bend that extends into the water distributor housing. The upper edge of a water distribution baffle is partially inserted into the water distribution bend through the semi-circular groove to form an overflow weir structure, while the lower part of the water distribution baffle is attached to the inner wall of the water distributor housing.

4. The deoxygenation mechanism as described in claim 2, characterized in that, The water distributor housing is composed of an upper elliptical shell and a lower cylindrical shell joined together, and the water distribution bend is arranged in a ring along the joint between the elliptical shell and the cylindrical shell.

5. The deoxygenation mechanism as described in claim 2, characterized in that, The aforementioned water distribution mechanism includes a water distribution plate located below the outlet of the water distribution bend, a hollow water distribution column connected to the top of the inner cavity of the water distributor housing, and a water inlet hole circumferentially arranged on the hollow water distribution column at a height corresponding to the outlet of the water distribution bend.

6. The deoxygenation mechanism as described in claim 5, characterized in that, The upper surface of the water distribution plate has triangular water distribution protrusions distributed in concentric circles, with the inclined surface of the triangular water distribution protrusions facing the center of the water distribution plate.

7. The deoxygenation mechanism as described in claim 5, characterized in that, The inner cavity of the hollow water-dividing column is truncated cone-shaped. The internal water-dividing mechanism includes a water-dividing plate located below the water inlet of the hollow water-dividing column. A column connects the water-dividing plate to the top of the inner cavity of the hollow water-dividing column. A circumferential gap is left between the circumferential of the water-dividing plate and the side wall of the inner cavity of the hollow water-dividing column.

8. A preheating deoxygenation device, characterized in that, The device includes a preheating mechanism for input water and a deoxygenation mechanism as described in any one of claims 1 to 7. Room temperature oxygenated water enters the condenser tube of the preheating mechanism and exchanges heat with the high temperature gas entering the preheating mechanism to raise its temperature. The outlet of the preheating mechanism is connected to the inlet of the deoxygenation mechanism.

9. The preheating deoxygenation device as described in claim 8, characterized in that, The preheating mechanism includes a heat exchange box, a condenser tube assembly arranged horizontally inside the heat exchange box, an air inlet on the rear cover plate of the heat exchange box, a liquid guide pipe on the bottom plate of the heat exchange box, a water inlet box and a water inlet pipe on one side of the heat exchange box, and a water outlet box and a water outlet pipe on the other side of the heat exchange box. The water outlet pipe is connected to the water inlet pipe of the water distributor of the deaeration mechanism.

10. The preheating deoxygenation device as described in claim 9, characterized in that, The lower side of the outer surface of the air inlet is provided with a hemispherical liquid-blocking structure, and the upper side of the hemispherical liquid-blocking structure has a notch.

11. The preheating deoxygenation device as described in claim 9, characterized in that, The inner surface of the base plate is provided with a liquid guiding groove, and the upper end of the liquid guiding pipe is flush with the bottom surface of the liquid guiding groove.

12. The preheating deoxygenation device as described in claim 9, characterized in that, The lateral projections of the inlet and outlet pipe holes do not coincide with the pipe holes of the condenser pipes on both sides of the heat exchange box.

13. A steam generator, comprising a shell, heat exchange tubes disposed within the shell, a tube box assembly disposed at one end of the shell, a refrigerant inlet pipe communicating with an inlet chamber within the tube box assembly, and a refrigerant drain pipe communicating with a drain chamber within the tube box assembly; characterized in that, It also includes a preheating and deoxygenation device as described in any one of claims 8 to 12, wherein the preheating mechanism is disposed in the air inlet chamber of the tube box assembly, and the deoxygenation mechanism is disposed on the heat exchange tube; the rear cover plate of the preheating mechanism faces the outer end side of the tube box assembly, the water inlet pipe of the preheating mechanism is connected to an external water source, and the water outlet pipe of the preheating mechanism is connected to the water inlet pipe of the water distributor of the deoxygenation mechanism.

14. An air conditioning unit, characterized in that, Includes the steam generator as described in claim 13.

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