Thermal deoxidizing device, steam generator and heat pump unit

Abstract

The invention discloses a thermal deoxygenization device, a steam generator and a heat pump unit. The thermal deoxygenization device comprises an upper cover plate and a lower cover plate, the middle baffle is located below the upper cover plate, and the middle baffle and the upper cover plate are connected in a sealed mode to form a water storage chamber; the bottom plate is provided with dripping holes and located below the middle baffle, a deoxidizing chamber is arranged between the middle baffle and the bottom plate, one end of the deoxidizing chamber is opened to serve as a steam inlet, and the other end of the deoxidizing chamber is opened to serve as a steam outlet; the baffle assembly is located in the deoxidizing chamber, the baffle assembly comprises a plurality of deflection baffles which are sequentially arranged at intervals from the steam inlet to the steam outlet, and a deflection flow channel is formed between every two adjacent deflection baffles; wherein the middle baffle is provided with a plurality of spray heads for spraying water in the water storage chamber to the deoxidizing chamber, and the spray heads are arranged along the baffling flow channel. High-temperature steam is used for heating water to achieve the deoxygenization effect, the installation space is saved, system heat is efficiently utilized, the influence of the environment on the system is reduced, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, in particular to a thermal deoxidizer, a steam generator and a heat pump unit. Background Art

[0002] Flooded evaporators, thanks to their economic efficiency and operational stability, have become a core heat exchange device in the refrigeration and chemical industries. A steam generator utilizes this structure to perform a fluid exchange: the shell-side medium is replaced with water, while a high-temperature heat source fluid is introduced into the tube side. Heat transfer through the tube walls causes the shell-side water to undergo a phase change, generating steam. During operation, feedwater is continuously injected into the shell-side space to submerge the heat exchange tube bundle, absorbing heat from the tubes and enabling continuous evaporation.

[0003] During the steam generation process, heat exchange tube bundles, supporting components, and seal welds are exposed to high-temperature, turbulent water for extended periods. These conditions can easily induce electrochemical corrosion of materials, particularly when combined with fluid disturbances and structural gaps. This significantly accelerates corrosion rates, posing a serious safety hazard. Controlling the dissolved oxygen content of feedwater is a key approach to slowing corrosion. Current deoxygenation technologies include thermodynamic methods, vacuum degassing, chemical reduction, and metal filtration.

[0004] Thermal deoxygenation follows the Henry-Dalton law: as water temperature approaches saturation, its ability to dissolve gases decreases dramatically. When liquid water reaches its boiling point, the vapor partial pressure approaches the total system pressure, and the dissolved oxygen partial pressure approaches zero, forcing the dissolved gases to precipitate. This process requires overcoming a dual energy barrier: oxygen molecules must both overcome the gas-liquid interfacial tension and diffuse across the interface into the vapor phase.

[0005] Existing technologies suffer from significant engineering flaws: steam generators generally lack integrated deaerator designs, often relying on external deaerator units, resulting in a cumbersome system. Such solutions are prone to numerous problems: external brackets significantly increase equipment footprint and complexity of maintenance; independent heating systems consume additional energy and make waste heat recovery difficult. Furthermore, some existing devices rely on a single cooling or mechanical flow blockage method, such as contact condensation with a cooling frame or fixed separation plates. These designs are prone to droplet retention or gas-carrying droplets when operating under complex conditions.

[0006] Therefore, how to design a thermal deoxidation device that saves installation space and has good deoxidation effect is a technical problem that needs to be solved urgently in the industry. Summary of the Invention

[0007] In order to solve the defects of the existing technology such as occupying installation space and low deoxygenation efficiency, the present invention proposes a thermal deoxygenator, a steam generator and a heat pump unit. The thermal deoxygenator can be directly installed inside the steam generator, using high-temperature steam to heat water to achieve the deoxygenation effect, saving installation space, efficiently utilizing system heat and reducing the impact of the environment on it, thereby significantly reducing maintenance costs.

[0008] The technical solution adopted by the present invention is to design a thermal deoxidation device, comprising:

[0009] Upper cover;

[0010] A middle baffle is located below the upper cover plate, and the middle baffle is sealed and connected to the upper cover plate to form a water storage chamber;

[0011] A bottom plate is provided with drip holes and is located below the middle baffle. A deaerator is provided between the middle baffle and the bottom plate. One end of the deaerator is open as a steam inlet, and the other end is open as a steam outlet.

[0012] Among them, the middle baffle is equipped with multiple nozzles that spray water from the water storage chamber into the deaeration chamber.

[0013] Furthermore, the thermal deoxidation device also includes:

[0014] The baffle assembly is located in the deaerator chamber. The baffle assembly includes a plurality of deflection baffles arranged in sequence from the steam inlet to the steam outlet. A deflection flow channel is formed between two adjacent deflection baffles, and the nozzles are arranged along the deflection flow channel.

[0015] The ends of the baffles at odd positions in the baffle assembly are flush, and the ends of the baffles at even positions are flush, and the ends of any two adjacent baffles are staggered to form a connecting port of the baffle channel.

[0016] In some embodiments of the present invention, the deflection baffle is a corrugated baffle or a broken line baffle.

[0017] Furthermore, the bottom plate is tilted so that the end where the steam inlet is located is lower than the end where the steam outlet is located.

[0018] Furthermore, a water hole is provided at the bottom of the deflection baffle.

[0019] Furthermore, the bottom plate is provided with a liquid collecting trough located in and along the baffled flow channel, and a hole is opened at the bottom of the liquid collecting trough to form a dripping hole.

[0020] In some embodiments of the present invention, the nozzle includes: a nozzle and a cone disk located below the nozzle, the top of the nozzle is connected to the water storage chamber, and the bottom of the nozzle is provided with an inverted cone spray hole, which faces the cone disk.

[0021] The present invention also proposes a steam generator, comprising: a cylinder having a water inlet pipe and an air outlet pipe, a heat exchange tube assembly arranged in the cylinder, and the above-mentioned thermal deoxidizer, the thermal deoxidizer being arranged in the cylinder, the water storage chamber being connected to the water inlet pipe, and the bottom plate being located above the heat exchange tube assembly.

[0022] Furthermore, the bottom plate and the middle baffle are sealed and connected to the cylinder in the width direction;

[0023] A gap is provided between one end of the bottom plate near the steam inlet and the cylinder to form an air intake area, and the other end near the steam outlet is sealed and connected to the cylinder, and the air intake area is connected to the steam inlet;

[0024] One end of the middle baffle close to the steam inlet is sealed with the cylinder, and a distance is provided between the other end close to the steam outlet and the cylinder to form a gas outlet area, which is connected to the steam outlet.

[0025] Furthermore, the air outlet pipe is located at an end of the cylinder away from the steam outlet.

[0026] The present invention also provides a heat pump unit, comprising: the above-mentioned steam generator.

[0027] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0028] 1. The thermal deaerator is designed with a water storage chamber and a deaerator chamber. The water vapor in the steam generator is introduced into the deaerator chamber through the steam inlet and steam outlet of the deaerator chamber. The high-temperature steam is used to heat the water to achieve the deoxygenation effect. The water is then dripped down through the drip holes on the bottom plate onto the heat exchange tubes of the steam generator. This saves installation space, efficiently utilizes system heat, reduces environmental impact, and significantly reduces maintenance costs.

[0029] 2. Multiple baffles are designed in the deaerator chamber. A baffle channel is formed between two adjacent baffles. The nozzles are arranged along the baffle channel. The baffles and nozzles are used to make water collide with the surface of the corrugated baffle and break the liquid film, thereby improving the heat exchange efficiency of the droplets.

[0030] 3. The bottom plate is tilted so that the steam inlet is lower than the steam outlet. The high-temperature steam in the deaerator chamber gradually flows upward to the steam outlet, and the liquid in the deaerator chamber gradually flows downward to the steam inlet. The high-temperature steam and liquid are fully mixed during the flow process, optimizing the deaeration efficiency.

[0031] 4. A water hole is provided at the bottom of the baffle plate, through which the water in the baffle flow channel can flow downward, be distributed downward from the drip holes or flow out from the steam inlet, thereby dividing the gas-liquid flow channel and improving the gas-liquid separation efficiency in the deaerator chamber;

[0032] 5. The bottom plate is provided with a liquid collecting tank arranged along the baffle flow channel. Holes are opened at the bottom of the liquid collecting tank to form drip holes, so that the deoxygenated water is evenly sprinkled on the heat exchange tubes to optimize the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is described in detail below with reference to the embodiments and accompanying drawings, in which:

[0034] Figure 1 is a schematic diagram of the interior of the steam generator of the present invention;

[0035] Figure 2 is a schematic cross-sectional view of a steam generator of the present invention;

[0036] Figure 3 Schematic diagram of the thermal deoxidation device of the present invention;

[0037] Figure 4 It is a cross-sectional schematic diagram of the thermal deoxidation device of the present invention;

[0038] Figure 5 yes Figure 4 A magnified schematic diagram of point A in the middle;

[0039] Figure 6 yes Figure 4 A magnified schematic diagram of point B in the middle;

[0040] Figure 7 1 is a bottom view schematic diagram of the baffle in the present invention;

[0041] Figure 8 1 is a side view of the baffle of the present invention;

[0042] Figure 9 1 is a bottom view schematic diagram of the deflection baffle of the present invention;

[0043] Figure 10 Schematic diagram of the appearance of the nozzle of the present invention;

[0044] Figure 11 2 is a schematic cross-sectional view of a nozzle of the present invention;

[0045] Figure 12 Schematic diagram of the bottom plate of the present invention;

[0046] Figure 13 It is a cross-sectional schematic diagram of the collecting trough of the present invention;

[0047] Description of the drawings: 100, steam generator; 1, water inlet pipe; 2, upper cover; 3, nozzle; 31, nozzle; 32, cone disk; 4, deflection baffle; 41, deflection channel; 42, connecting port; 43, water hole; 5, middle baffle; 6, bottom plate; 61, drip hole; 62, collecting tank; 7, bracket; 8, steam outlet; 9, steam inlet; 10, air outlet pipe; 11, thermal deoxidizer; 12, gas-liquid filter; 13, cylinder; 14, heat exchange tube assembly. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0049] like Figures 1 to 4As shown, the thermal deaerator 11 proposed by the present invention is suitable for flooded evaporators, particularly steam generators 100. The thermal deaerator 11 comprises, arranged from top to bottom, an upper cover plate 2, a middle baffle plate 5, and a bottom plate 6. The middle baffle plate 5 is sealed to the upper cover plate 2 to form a water storage chamber, and a deaerator chamber is located between the middle baffle plate 5 and the bottom plate 6. Both ends of the deaerator chamber are open, serving as a steam inlet 9 and a steam outlet 8, respectively. The middle baffle plate 5 is equipped with multiple nozzles 3 that spray water from the water storage chamber into the deaerator chamber. The bottom plate 6 is provided with drip holes 61 for downward water distribution.

[0050] During operation, high-temperature steam enters the deaerator chamber from steam inlet 9 and flows toward steam outlet 8. Sprinkler 3 sprays water into the chamber, where the water in the chamber contacts and exchanges heat with the high-temperature steam, achieving a deoxygenating effect. The deoxygenated water then drips downward through drip holes 61 on bottom plate 6. This thermal deaerator 11 can be installed directly inside steam generator 100, utilizing the high-temperature steam within steam generator 100 to heat the water for deoxygenation. This saves installation space, efficiently utilizes system heat, reduces environmental impact, and significantly reduces maintenance costs.

[0051] like Figures 4 to 6 As shown, in some preferred embodiments of the present invention, the thermal deaerator 11 further includes: a baffle assembly, which includes a plurality of baffles 4 located within the deaerator chamber. These baffles 4 are arranged in sequence from the steam inlet 9 to the steam outlet 8. The top of the baffle 4 is connected to the middle baffle 5, and the bottom is connected to the bottom plate 6. Since the upper and lower parts of the baffles 4 are respectively blocked by the middle baffle 5 and the bottom plate 6, the area between two adjacent baffles 4 forms a baffle channel 41. The steam inlet 9 and the steam outlet 8 are connected to the baffle channel 41, and the high-temperature steam passes through the baffle channel 41 during the process of flowing from the steam inlet 9 to the steam outlet 8. The nozzle 3 is arranged along the baffle channel 41. The water sprayed by the nozzle 3 has an impact effect with the surface of the baffle 4, and the micro-scale breakup of the liquid film is achieved through the kinetic energy-surface energy conversion mechanism. The broken micro-droplets are fully in contact with the high-temperature steam, which significantly improves the droplet heat exchange efficiency.

[0052] like Figures 7 to 9As shown, based on the above preferred embodiment, the layout of the baffles 4 is optimized. Specifically, the ends of the baffles 4 at odd positions in the baffle assembly are flush, and the ends of the baffles 4 at even positions are flush, and the ends of any two adjacent baffles 4 are staggered to form a connecting port 42 of the baffle channel 41. For a certain baffle channel 41, high-temperature steam flows into the baffle channel 41 from one end, and then flows out from the other end of the baffle channel 41, and then enters the next baffle channel 41. The high-temperature steam flows back and forth between the baffle channels 41, and follows this rule until it flows out of the deaerator chamber from the steam outlet 8. This design can extend the flow path of the high-temperature steam, and the high-temperature steam stays in the deaerator chamber for a longer time, which promotes sufficient heat exchange between the high-temperature steam and the liquid in the channel, and the deaerator effect is better.

[0053] The shape of the deflection baffle 4 can be designed according to specific needs, and the preferred solution is to use a wave baffle or a broken line baffle.

[0054] For the undulating baffle, since the side wall of the corrugated baffle is a curved surface, the probability of the water flow ejected by the nozzle 3 being captured by impact is much lower than that of the flat baffle, which reduces the probability of free droplets in the chamber causing liquid to be inhaled, and when the steam moves rapidly along the flow channel, it will also impact the curved surface. The droplets that may be entrained in the gas will be captured by the baffle after the impact, reducing the amount of liquid inhaled by the steam; in addition, the heat exchange area of ​​the curved surface is larger, which can further improve the heat exchange efficiency of the system. In order to ensure the heat exchange efficiency, the shape design of the corrugated baffle should be based on whether the liquid spray can cause enough impact to effectively break up the liquid film. For example, a single curved surface of the corrugated baffle is semicircular and a nozzle 3 is set at the center of each circle. The corrugated baffle is composed of multiple semicircles with opposite bending directions connected continuously. r is the radius of the semicircle, and h is the shortest distance between the centers of two adjacent corrugated baffles. When When the nozzle 3 has a blind spot in its spray range, the deflection channel 41 has a part that cannot be sprayed, and the utilization rate of the corrugated baffle is low, resulting in unnecessary cost loss;

[0055] Under certain conditions, the number of nozzles can be increased by reducing h and r to meet different working conditions.

[0056] For folded baffles, since their sidewalls are inclined, when the angle between two adjacent inclined surfaces is narrow, liquid can easily accumulate at the angle, leading to poor impact effect of the nozzle 3 and uneven heat exchange. It is recommended to choose a folded baffle with a larger angle or replace the sharp corners with straight edges so that the water flow from the nozzle 3 can vertically impact the sidewalls of the folded baffle over a larger range, reducing liquid accumulation at the concave corners.

[0057] like Figure 10 、 11To enhance deoxygenation, some preferred embodiments of the present invention feature an optimized structure for nozzle 3. Specifically, nozzle 3 comprises a nozzle 31 and a conical disc 32. Nozzle 31 is hollow, with its top end connected to a water storage chamber and its bottom end provided with an inverted conical spray hole. Conical disc 32 is mounted horizontally below nozzle 31, with the inverted conical spray hole facing it. High-pressure water impacts disk 32, forcing water along its end surface to create a showering effect, impacting the surface of the baffle. The gap between the inverted conical spray hole and disk 32 should be within 2 mm, ensuring a more compact nozzle structure while ensuring a more effective impact.

[0058] like Figure 1 、 2 As shown, in some preferred embodiments of the present invention, the installation of base plate 6 is optimized. Specifically, the base plate is tilted so that the end where the steam inlet 9 is located is lower than the end where the steam outlet 8 is located. The steam inlet 9 actually serves as the liquid outlet of the deaerator chamber. Due to the significant density difference between steam and liquid, the high-temperature steam in the deaerator chamber gradually flows upward to the steam outlet 8, while the liquid in the deaerator chamber gradually flows downward to the steam inlet 9. The high-temperature steam and liquid are fully mixed during the flow process, optimizing deoxidation efficiency.

[0059] On this basis, water holes 43 can be evenly distributed at the bottom of the deflection baffle 4. The water in the deflection channel 41 can flow downward through the water holes 43, drip downward from the drip holes 61 or flow out from the steam inlet 9. The liquid is smoothly discharged from the lower part of the deflection channel 41, reserving space for steam circulation, thereby improving the gas-liquid separation efficiency in the deoxygenation chamber.

[0060] like Figure 12 、 13 As shown, in order to improve the liquid distribution effect of the thermal deoxygenator 11, the bottom plate 6 is provided with a liquid collecting trough 62. The liquid collecting trough 62 is located in the deflecting flow channel 41 and is arranged along the deflecting flow channel 41. The bottom opening of the liquid collecting trough 62 forms a dripping hole 61. The liquid collecting trough 62 generally adopts a V-shaped groove. In actual application, it can also be designed according to specific needs. The dripping holes 61 should be as small and equal as possible to ensure that the droplets have enough time to heat and the droplet size is as uniform as possible when dripping into the heat exchange tube assembly 14 of the steam generator 100. The deoxygenated water in the deflecting flow channel 41 is collected by the liquid collecting trough 62, and then the water is evenly distributed downward through the dripping holes 61. The thermal deoxygenator 11 of this design can replace the gas-liquid filter 12 that occupies most of the space in the traditional steam generator 100 while realizing the function of a liquid distributor, thereby improving space utilization. It should be understood that, in order to ensure uniform liquid distribution, the baffles 4 are evenly arranged in the deaerator chamber, and the horizontal spacing between the liquid collecting trough 62 and the baffles 4 is equal everywhere.

[0061] like Figure 1 、 2As shown, the present invention also proposes a steam generator 100, including: a cylinder 13, a heat exchange tube assembly 14 and a thermal deoxidizer 11. A water inlet pipe 1 and an air outlet pipe 10 are provided on the top of the cylinder 13. The heat exchange tube assembly 14 includes a plurality of heat exchange tubes arranged in parallel in the cylinder 13. The thermal deoxidizer 11 is installed inside the steam generator 100, and the water storage chamber is connected to the water inlet pipe 1. The bottom plate 6 is located above the heat exchange tube assembly 14.

[0062] This design introduces water vapor from the steam generator 100 into the deaerator chamber through the steam inlet 9 and steam outlet 8 of the deaerator chamber, uses high-temperature steam to heat the water to achieve a deoxygenation effect, and then drips downward onto the heat exchange tubes of the steam generator 100 through the drip holes 61 on the bottom plate 6. This saves installation space, efficiently utilizes system heat, reduces environmental impact, and significantly reduces maintenance costs.

[0063] The specific installation structure of the thermal deoxidizer 11 in the steam generator 100 is as follows:

[0064] The bottom plate 6 and the middle baffle 5 are sealed to the cylinder 13 in the width direction, so that the water vapor generated by the heat exchange tube assembly 14 cannot pass through the thermal deoxidizer 11 from both sides of the cylinder 13 in the width direction.

[0065] A gap is provided between the end of the bottom plate 6 near the steam inlet 9 and the cylinder 13 to form an air inlet area, which is connected to the steam inlet 9. A support bar located in the air inlet area and a bracket 7 located in the width direction of the bottom plate 6 are provided within the cylinder 13. The end of the bottom plate 6 near the steam inlet 9 is placed on the support bar, and both sides of the bottom plate 6 in the width direction are placed on the bracket 7. The other end of the bottom plate 6 near the steam outlet 8 is sealed with the cylinder 13. A gap is provided between the other end of the middle baffle 5 near the steam outlet 8 and the cylinder 13 to form an air outlet area, which is connected to the steam outlet 8. The end of the middle baffle 5 near the steam inlet 9 is sealed with the cylinder.

[0066] This installation structure blocks the middle baffle 5 above the air inlet area and the bottom plate between the heat exchange tube assembly 14 and the air outlet area, so that the water vapor generated by the heating of the heat exchange tube assembly 14 can only enter the steam inlet 9 of the deaerator chamber from the air inlet area and then flow out of the deaerator chamber from the steam outlet 8.

[0067] In some preferred embodiments of the present invention, outlet pipe 10 is located at the end of cylinder 13 away from steam outlet 8. The water vapor generated by heating in heat exchange tube assembly 14 is subjected to heat exchange treatment in thermal deoxidizer 11, avoiding the conventional method of directly delivering the water vapor to outlet pipe 10, which would cause the steam to absorb liquid. Furthermore, the distance between outlet pipe 10 and steam outlet 8 is relatively large, allowing sufficient time for gas-liquid separation to occur. In actual use, a gas-liquid filter 12 can be installed in outlet pipe 10 to further enhance gas-liquid separation.

[0068] The present invention also provides a heat pump unit comprising the aforementioned steam generator 100. The steam generator 100 eliminates the risk of dissolved oxygen corrosion at the source through a built-in thermal deoxidizer 11. It also utilizes the heat pump unit's own heat source to achieve zero-additional energy deoxidation, outputting high-quality, industrial-grade, high-temperature steam. This compact structure achieves the synergistic effects of extending equipment life, reducing maintenance costs, and improving system energy efficiency.

[0069] It should be noted that the terms used above are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. When the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof. The order of execution of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and as long as the output of the previous processing is not used in the subsequent processing. Similar sequential terms used for the convenience of description do not mean that they must be implemented in such an order.

[0070] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but, where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Thermal deoxidation device, characterized in that: include: Upper cover; a middle baffle, located below the upper cover plate, the middle baffle being sealedly connected to the upper cover plate to form a water storage chamber; A bottom plate is provided with drip holes and is located below the middle baffle plate. A deaerator chamber is provided between the middle baffle plate and the bottom plate. One end of the deaerator chamber is open as a steam inlet and the other end is open as a steam outlet. Wherein, the middle baffle is equipped with a plurality of nozzles for spraying the water in the water storage chamber toward the deaerator chamber.

2. The thermal deoxidation device according to claim 1, characterized in that: Also includes: A baffle assembly is located in the deaerator chamber. The baffle assembly includes a plurality of deflection baffles arranged in sequence from the steam inlet to the steam outlet. A deflection flow channel is formed between two adjacent deflection baffles, and the nozzle is arranged along the deflection flow channel.

3. The thermal deoxidation device according to claim 2, characterized in that: The ends of the deflection baffles at odd positions in the baffle assembly are flush, and the ends of the deflection baffles at even positions are flush, and the ends of any two adjacent deflection baffles are staggered to form a connecting port of the deflection flow channel.

4. The thermal deoxidation device according to claim 2, characterized in that: The deflection baffle is a corrugated baffle or a broken line baffle.

5. The thermal deoxidation device according to claim 2, characterized in that: The bottom plate is tilted so that the end where the steam inlet is located is lower than the end where the steam outlet is located.

6. The thermal deoxidation device according to claim 5, characterized in that: A water hole is provided at the bottom of the deflection baffle.

7. The thermal deoxidation device according to claim 2, characterized in that: The bottom plate is provided with a liquid collecting trough located in and along the baffled flow channel, and a hole is opened at the bottom of the liquid collecting trough to form the dripping hole.

8. The thermal deoxidation device according to any one of claims 1 to 7, characterized in that: The nozzle includes a nozzle and a cone disk located below the nozzle. The top end of the nozzle is connected to the water storage chamber. The bottom end of the nozzle is provided with an inverted cone spray hole, and the inverted cone spray hole faces the cone disk.

9. Steam generator, including: A cylinder having a water inlet pipe and an air outlet pipe, and a heat exchange tube assembly arranged in the cylinder, characterized in that it also includes: the thermal deoxygenation device according to any one of claims 1 to 8, the thermal deoxygenation device is arranged in the cylinder, the water storage chamber is connected to the water inlet pipe, and the bottom plate is located above the heat exchange tube assembly.

10. The steam generator according to claim 9, characterized in that The bottom plate and the middle baffle are sealed and connected to the cylinder in the width direction; A gap is provided between one end of the bottom plate close to the steam inlet and the cylinder to form an air intake area, and the other end close to the steam outlet is sealedly connected to the cylinder, and the air intake area is connected to the steam inlet; One end of the middle baffle close to the steam inlet is sealed with the cylinder, and a gap is provided between the other end close to the steam outlet and the cylinder to form an air outlet area, which is connected to the steam outlet.

11. The steam generator according to claim 9, characterized in that The air outlet pipe is located at an end of the cylinder away from the steam outlet.

12. A heat pump unit, characterized in that: include: The steam generator according to any one of claims 9 to 11.

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