Steam generator

Abstract

The present invention provides a steam generator, comprising a casing, a steam generating chamber is arranged in the casing; a deoxidation component is arranged in the steam generating chamber, the deoxidation component comprises a liquid circulation part and a steam circulation part, at least a part of the liquid circulation part is in contact with the steam circulation part, so that the steam in the steam circulation part heats the liquid to be deoxidized in the liquid circulation part to perform deoxidation; wherein the steam inlet and the steam outlet of the steam circulation part are respectively connected to the steam generating chamber, so that the steam in the steam generating chamber flows through the steam circulation part and then flows back to the steam generating chamber. The present application solves the problem that the steam generator in the prior art needs to be provided with an independent thermal deoxidation system, resulting in a complex system structure.

Description

Technical Field

[0001] The invention relates to the technical field of thermal deoxidation, and in particular to a steam generator. Background Art

[0002] The horizontal tube-type full-liquid evaporator has gradually become the core component of the high-temperature steam heat pump unit due to its low cost, simple structure, strong stability, and large cooling capacity. When it is used as a steam generator, the liquid water outside the heat exchange tube is heated into high-temperature steam by the high-temperature refrigerant inside the tube. At the same time, the external feed water continuously enters the shell side to replenish the water. In the above process, the shell side water quality determines the durability and safety of the steam generator to a large extent. When the oxygen content of the feed water is too high, it will cause equipment corrosion. When the corrosion amount reaches 2%-5%, it is enough to cause pits on the inner wall of the equipment, further aggravating the accumulation of sediments, accelerating under-scale corrosion, and ultimately causing perforation, bursting and scrapping. Therefore, feed water deoxygenation is an indispensable and important process in the steam production system.

[0003] At present, the feed water deoxygenation methods are mainly divided into physical deoxygenation and chemical deoxygenation. The former mainly includes thermal deoxygenation, vacuum deoxygenation, etc., and the latter mainly includes iron filings deoxygenation, chemical deoxygenation, etc. Among them, thermal deoxygenation is widely used because of its low cost, ability to remove dissolved oxygen and other gases in the feed water at the same time, and no residual substances. Thermal deoxygenation is based on the Henry-Dalton theorem, that is, the closer the water is to the saturated state, the less oxygen content in the water. Therefore, a part of the output steam can be used to heat the feed water to the saturated state to achieve the purpose of deoxygenation.

[0004] The existing conventional steam generator system needs to be equipped with an independent thermal deaeration system, which is generally large in size and has many pipelines, which increases the complexity of the system to a certain extent and cannot achieve the goal of equipment miniaturization. At the same time, the high-temperature steam generated will no longer participate in the circulation after completing the deaeration of the feed water, resulting in steam waste. Summary of the invention

[0005] The main purpose of the present invention is to provide a steam generator to solve the problem that the steam generator in the prior art needs to be provided with an independent thermal deoxidation system, resulting in a complex system structure.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a steam generator is provided, comprising: a casing, in which a steam generating chamber is arranged; a deoxygenation component is arranged in the steam generating chamber, the deoxygenation component comprises a liquid flowing part and a steam flowing part, at least a part of the liquid flowing part is in contact with the steam flowing part, so that the steam in the steam flowing part heats the liquid to be deoxygenated in the liquid flowing part to perform deoxygenation; wherein the steam inlet and the steam outlet of the steam flowing part are respectively connected to the steam generating chamber, so that the steam in the steam generating chamber flows through the steam flowing part and then flows back into the steam generating chamber.

[0007] Furthermore, the steam generator also includes a liquid inlet and a heat exchange tube bundle, and at least a portion of the liquid inlet is arranged in the steam generating chamber to spray the liquid to be deoxygenated into the steam generating chamber; the steam circulation portion includes: a mixed flow channel, which is at least partially arranged between the liquid inlet and the heat exchange tube bundle, and the mixed flow channel is used to circulate the first part of steam to mix with the first part of the liquid to be deoxygenated falling into the mixed flow channel and heat the first part of the liquid to be deoxygenated.

[0008] Furthermore, the deoxidation component also includes: a support tube, which is arranged in the steam generating chamber, and a mixed flow channel is arranged in the support tube, and along the flow direction of the first part of the steam, the cross-sectional area of ​​the flow section of the mixed flow channel gradually decreases.

[0009] Furthermore, the liquid circulation part includes: a guide plate, which is arranged on the outer wall surface of the support tube and located at the top end of the support tube, the guide plate is arranged around the support tube, and at least a part of the guide plate is opposite to the liquid inlet part, so as to carry the second part of the liquid to be deoxygenated sprayed into the liquid inlet part; a first flow hole is arranged between the guide plate and the support tube, and the second part of the liquid to be deoxygenated flows along the outer wall surface of the support tube through the first flow hole. In this process, the second part of the liquid to be deoxygenated on the outer wall surface of the support tube is heated by the first part of the steam in the mixed flow channel; there are multiple first flow holes, and the multiple first flow holes are arranged at intervals along the circumference of the support tube.

[0010] Furthermore, the deoxygenation component also includes: a water receiving tray, a first avoidance port is arranged on the water receiving tray, the support tube is arranged on the water receiving tray and connected with the first avoidance port, and the second part of the liquid to be deoxygenated sprayed into the liquid inlet part is sprayed into the water receiving tray for convergence; the liquid circulation part also includes: a first guide channel, the first guide channel is connected with the water receiving tray, and the second part of the liquid to be deoxygenated in the water receiving tray flows into the first guide channel; the steam circulation part also includes: a second guide channel, which is in contact with the first guide channel, and the second guide channel is used to guide the second part of the steam to heat the second part of the liquid to be deoxygenated in the first guide channel.

[0011] Furthermore, the deoxygenation component also includes: a guide component, which is arranged in the steam generating chamber and located on the side of the water receiving tray, and a hollow cavity is arranged in the guide component to form a second guide channel, and the hollow cavity is connected to the steam generating chamber; a groove is arranged on the guide component, one end of the groove is connected to the water receiving tray, and the other end is connected to the steam generating chamber, and at least part of the groove is the first guide channel; the groove and / or the hollow cavity extends along a spiral trajectory.

[0012] Furthermore, a steam exhaust pipe is provided on the casing, the steam exhaust pipe is connected to the steam generating chamber, and the steam in the steam generating chamber is discharged through the steam exhaust pipe; the flow guide component includes: a connecting end plate, a plurality of second connecting holes are provided on the connecting end plate, and the groove is connected to the water receiving tray through each of the second connecting holes; a steam connecting port is provided on the connecting end plate, and the steam connecting port is connected to the steam exhaust pipe and the hollow cavity respectively.

[0013] Furthermore, the guide component also includes: a discharge end plate, on which a third connecting hole is arranged; the deoxygenation component also includes: a drainage pipe fitting, which is arranged below the guide component and connected to the hollow cavity through the third connecting hole, and the drainage pipe fitting is provided with multiple exhaust holes, and the steam in the hollow cavity is discharged into the steam generating chamber through each exhaust hole.

[0014] Furthermore, there are a plurality of third connecting holes, which are arranged at intervals along the length direction of the discharge end plate, and there are a plurality of drainage pipes, which are arranged in one-to-one correspondence with the plurality of third connecting holes.

[0015] Furthermore, a plurality of fourth connecting holes are arranged on the bottom surface of the groove, and the plurality of fourth connecting holes are arranged at intervals along the extension direction of the groove. Each fourth connecting hole is connected to the hollow cavity, and part of the steam in the hollow cavity overflows into the groove through the fourth connecting holes to heat the second part of the liquid to be deoxygenated.

[0016] Furthermore, the deoxygenation assembly also includes: a spoiler component, which is arranged on the bottom surface of the groove, and the spoiler component includes a guide surface, at least a part of the guide surface is a curved surface, and the second part of the liquid to be deoxygenated in the groove is guided by the curved surface; wherein, there are multiple spoilers, and the multiple spoilers are arranged at intervals along the extension direction of the groove.

[0017] Furthermore, the spoiler component includes: a spoiler body, which is arranged in the groove, and at least a portion of the guide surface is arranged on the spoiler body; a supporting foot, which is arranged on the spoiler body, and at least a portion of the supporting foot is in contact with the bottom surface of the groove; an extension plate, which is arranged on the spoiler body, and the extension plate extends from the spoiler body toward the direction close to the bottom surface of the groove to form a guide space between the extension plate, the supporting foot and the bottom surface of the groove.

[0018] The technical solution of the present invention is applied, and the steam generator includes a casing and a deoxidation component, and the deoxidation component is arranged in the steam generating chamber, and the deoxidation component includes a liquid circulation part and a steam circulation part, and at least a part of the liquid circulation part is attached to the steam circulation part, so that the steam in the steam circulation part heats the liquid to be deoxidized in the liquid circulation part to perform deoxidation; wherein, the steam inlet and the steam outlet of the steam circulation part are respectively connected to the steam generating chamber, so that the steam in the steam generating chamber flows through the steam circulation part and then flows back to the steam generating chamber. Such a setting does not need to separately set a deoxidation pipeline system outside the casing, and the deoxidation component is directly set in the steam generating chamber, which not only simplifies the system structure, but also reduces the occupied space. In addition, the steam inlet and the steam outlet of the steam circulation part are respectively connected to the steam generating chamber, and the steam in the steam circulation part flows back to the steam generating chamber through the steam outlet after completing the deoxidation work, instead of being directly discharged or no longer circulated like the traditional system, which not only reduces the waste of steam, but also improves the utilization efficiency of steam and reduces the overall energy consumption of the equipment. The fitting design of the liquid circulation part and the steam circulation part ensures sufficient contact between the steam and the liquid to be deoxygenated, thus improving the deoxygenation efficiency. It directly utilizes the steam in the steam generating chamber for deoxygenation, thus avoiding the need for an additional independent thermal deoxygenation system and simplifying the system structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 shows a front view of a steam generator according to the present invention;

[0021] Figure 2 shows a side view of a steam generator according to the present invention;

[0022] Figure 3 A structural split diagram of a deoxidation component in a steam generator according to the present invention is shown;

[0023] Figure 4 A top view of a deoxidation assembly in a steam generator according to the present invention is shown;

[0024] Figure 5 A schematic structural diagram of a deoxidation component in a steam generator according to the present invention is shown;

[0025] Figure 6 A cross-sectional view of a guide component in a steam generator according to the present invention is shown;

[0026] Figure 7 A top view of a spoiler component in a steam generator according to the present invention is shown;

[0027] Figure 8 A side view of a spoiler in a steam generator according to the present invention is shown;

[0028] Fig. 9 A schematic diagram of a deoxygenation system of a steam generator according to the present invention is shown;

[0029] Fig.10 A schematic structural diagram of a steam generator in the prior art is shown;

[0030] Fig.11 A schematic diagram of a deoxygenation system for a steam generator according to the prior art is shown.

[0031] The above drawings include the following reference numerals:

[0032] 100, casing; 110, steam generating chamber; 120, liquid inlet; 130, heat exchange tube bundle; 140, exhaust pipe; 150, steam inlet pipe; 160, liquid discharge pipe; 170, partition plate; 180, filter element; 190, water inlet;

[0033] 200, deaerator assembly; 210, liquid circulation part; 211, guide plate; 2110, first circulation hole; 212, first guide channel; 213, baffle; 220, steam circulation part; 221, mixed flow channel; 222, second guide channel; 230, support cylinder; 240, water receiving tray; 2401, first avoidance port; 250, guide component; 251, hollow cavity; 252, groove; 252 0, fourth connecting hole; 253, connecting end plate; 2530, second connecting hole; 254, middle end plate; 255, discharge end plate; 2550, third connecting hole; 256, discharge outlet; 260, drainage pipe; 2601, exhaust hole; 270, spoiler component; 2701, guide surface; 271, spoiler body; 272, supporting foot; 273, extension plate; 280, connecting pipeline; 281, pump body. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] As mentioned in the background technology, the existing steam generator needs to be equipped with a separate deoxidation system for deoxidation operation, such as Fig.10 and Fig.11As shown, a deoxygenation pipeline is added to the pipeline system outside the steam generator to achieve the purpose of deoxygenating the liquid in the steam generator, but such a setting not only takes up space, but also increases the complexity of the system. Therefore, in order to solve the above technical problems, the steam generator provided by the present application is provided with a deoxygenation component 200 inside the steam generating chamber 110, and the steam in the steam generating chamber 110 is used to heat the liquid to be deoxygenated in the liquid circulation part 210, so as to achieve the purpose of deoxygenation. In this way, there is no need to separately set up a deoxygenation pipeline outside the steam generator, and the steam used for deoxygenating the liquid to be deoxygenated can directly use the steam in the steam generating chamber 110, so as to realize the recycling of steam, save resources, and solve the problem that the deoxygenation system of the steam generator in the prior art is complex in structure and occupies space.

[0036] Please refer to Figures 1 to 9 The present application provides a steam generator, comprising: a casing 100, in which a steam generating chamber 110 is arranged; a deoxidation component 200, which is arranged in the steam generating chamber 110, and the deoxidation component 200 comprises a liquid flowing part 210 and a steam flowing part 220, wherein at least a portion of the liquid flowing part 210 is in contact with the steam flowing part 220, so that the steam in the steam flowing part 220 heats the liquid to be deoxygenated in the liquid flowing part 210 for deoxidation; wherein the steam inlet and the steam outlet of the steam flowing part 220 are respectively connected to the steam generating chamber 110, so that the steam in the steam generating chamber 110 flows through the steam flowing part 220 and then flows back into the steam generating chamber 110.

[0037] The steam generator provided in the present application includes a casing 100 and a deoxygenation component 200. The deoxygenation component 200 is arranged in a steam generating chamber 110. The deoxygenation component 200 includes a liquid flowing portion 210 and a steam flowing portion 220. At least a portion of the liquid flowing portion 210 is in contact with the steam flowing portion 220, so that the steam in the steam flowing portion 220 heats the liquid to be deoxygenated in the liquid flowing portion 210 for deoxygenation. The steam inlet and the steam outlet of the steam flowing portion 220 are respectively connected to the steam generating chamber 110, so that the steam in the steam generating chamber 110 flows through the steam flowing portion 220 and then flows back into the steam generating chamber 110. This arrangement does not require a separate deoxygenation piping system to be installed outside the casing 100, and the deoxygenation component 200 can be directly installed in the steam generating chamber 110, which not only simplifies the system structure, but also reduces the occupied space. In addition, the steam inlet and the steam outlet of the steam circulation part 220 are respectively connected to the steam generating chamber 110. After the deoxygenation work is completed, the steam in the steam circulation part 220 flows back to the steam generating chamber 110 through the steam outlet, instead of being directly discharged or no longer circulated like the traditional system. This not only reduces the waste of steam, but also improves the utilization efficiency of steam and reduces the overall energy consumption of the equipment. The fitting design of the liquid circulation part 210 and the steam circulation part 220 ensures sufficient contact between the steam and the liquid to be deoxygenated, thereby improving the deoxygenation efficiency. By directly utilizing the steam in the steam generating chamber for deoxygenation, it avoids the need for an additional independent thermal deoxygenation system, thereby simplifying the system structure.

[0038] like Figure 1 As shown, the steam generator also includes a liquid inlet 120 and a heat exchange tube bundle 130, at least part of which is disposed in the steam generating chamber 110 to spray the liquid to be deoxygenated into the steam generating chamber 110; the steam circulation part 220 includes: a mixed flow channel 221, at least part of which is disposed between the liquid inlet 120 and the heat exchange tube bundle 130, and the mixed flow channel 221 is used to circulate the first part of the steam to mix with the first part of the liquid to be deoxygenated falling into the mixed flow channel 221 and heat the first part of the liquid to be deoxygenated. Such a design enables the steam to not only directly contact the liquid to be deoxygenated in the mixed flow channel for preliminary mixing and heating, but also, due to the position design of the mixed flow channel, the steam can directly heat the sprayed liquid, thereby achieving spray deoxygenation.

[0039] The presence of the mixed flow channel 221 not only increases the effective contact time between steam and liquid and ensures sufficient heat exchange, but also improves the utilization efficiency of steam and reduces steam waste through direct mixing of steam and liquid. After the first part of the steam is heated and deoxygenated, it can flow back to the steam generating chamber to participate in the subsequent steam generation process and form an efficient circulation system. After the first part of the liquid to be deoxygenated is initially heated and deoxygenated in the mixed flow channel, it will continue to flow downward and be further heated by the heat exchange tube bundle to achieve the final steam generation. Such a design can ensure that the liquid has been effectively preheated before entering the heat exchange tube bundle, reduce the burden on the heat exchange tube, improve the heat exchange efficiency, and further ensure the quality of the steam.

[0040] Specifically, the deoxygenation component 200 also includes: a support tube 230, which is arranged in the steam generating chamber 110, and a mixed flow channel 221 is arranged in the support tube 230. Along the flow direction of the first part of the steam, the cross-sectional area of ​​the flow section of the mixed flow channel 221 gradually decreases. The flow section of the mixed flow channel 221 gradually decreases along the flow direction of the steam, which means that when the steam passes through the mixed flow channel 221, its flow velocity will gradually increase, thereby forming a stronger shear force on the contact surface between the steam and the liquid to be deoxygenated. This shear force contributes to the atomization and turbulence of the liquid, increases the contact area between steam and water, accelerates the escape of dissolved oxygen and the heat transfer of steam, and significantly improves the efficiency of deoxygenation and heat exchange. The support tube not only carries the mixed flow channel, but also plays a role in structural support, simplifies the internal structural layout of the equipment, reduces the use of additional supports, and reduces the manufacturing cost and maintenance complexity of the equipment.

[0041] In specific implementation, Figure 3As shown, the liquid circulation part 210 includes: a guide plate 211, which is arranged on the outer wall surface of the support tube 230 and located at the top of the support tube 230. The guide plate 211 is arranged around the support tube 230, and at least a part of the guide plate 211 is opposite to the liquid inlet 120, so as to carry the second part of the liquid to be deoxygenated sprayed by the liquid inlet 120; a first flow hole 2110 is arranged between the guide plate 211 and the support tube 230, and the second part of the liquid to be deoxygenated flows along the outer wall surface of the support tube 230 through the first flow hole 2110. In this process, the second part of the liquid to be deoxygenated on the outer wall surface of the support tube 230 is heated by the first part of the steam in the mixed flow channel 221; there are multiple first flow holes 2110, and the multiple first flow holes 2110 are arranged at intervals along the circumference of the support tube 230. The guide plate 211 of the liquid circulation part 210 is designed to surround the outer wall surface of the support tube 230 and be located at the top thereof. This structure is conducive to the uniform distribution of the second part of the liquid to be deoxygenated. When the liquid to be deoxygenated is sprayed into the liquid inlet 120, the guide plate 211 can carry the liquid and form a water film along the outer wall of the support tube 230 through the multiple first flow holes 2110 thereon, thereby increasing the contact area between the liquid and the steam, thereby improving the heat exchange efficiency. There are multiple first flow holes 2110 between the guide plate 211 and the support tube 230, and they are arranged at intervals along the circumference of the support tube 230, which means that after the liquid to be deoxygenated is distributed on the guide plate 211, it will evenly flow through the steam in the mixed flow channel 221 to form a stable water film. The steam will heat the water film, promote the escape of dissolved oxygen in the water, and realize film-forming deoxygenation, which is the second measure of the deoxygenation process. Such a design can ensure that the liquid to be deoxygenated has been effectively preheated and preliminarily deoxygenated before entering the heat exchange tube, thereby improving the deoxygenation efficiency and steam generation efficiency of the entire system.

[0042] A baffle 213 is also provided in the steam generating chamber 110 , and the baffle 213 is provided above the guide plate 211 . When the liquid inlet 120 sprays the deoxygenated liquid, the baffle 213 blocks the deoxygenated liquid and makes it flow into the guide plate 211 below.

[0043] Furthermore, the deoxygenation component 200 also includes: a water receiving tray 240, a first avoidance port 2401 is provided on the water receiving tray 240, the support tube 230 is provided on the water receiving tray 240 and is connected with the first avoidance port 2401, and the second part of the liquid to be deoxygenated sprayed into the liquid inlet part 120 is sprayed into the water receiving tray 240 for convergence; the liquid circulation part 210 also includes: a first guide channel 212, the first guide channel 212 is connected with the water receiving tray 240, and the second part of the liquid to be deoxygenated in the water receiving tray 240 flows into the first guide channel 212; the steam circulation part 220 also includes: a second guide channel 222, which is in contact with the first guide channel 212, and the second guide channel 222 is used to guide the second part of the steam to heat the second part of the liquid to be deoxygenated in the first guide channel 212. The water receiving tray 240 is connected to the support cylinder, so that when the other part of the liquid to be deoxygenated is sprayed into the water receiving tray 240 for convergence, a certain water layer thickness can be formed, which is conducive to reducing the surface tension of the droplets, making it easier for dissolved oxygen to escape, thereby achieving preliminary film-forming deoxygenation. Afterwards, the liquid fits with the second guide channel 222 of the steam circulation part 220 through the first guide channel 212, further strengthening the heat exchange between steam and liquid and improving the deoxygenation efficiency. The design of the second guide channel 222 enables the second part of the steam to fully contact the liquid in the first guide channel 212. After heating and deoxygenation, the steam can return to the steam generation chamber through a specific reflux path to participate in the subsequent steam generation process. This recycling of steam not only reduces the waste of steam, but also improves the utilization efficiency of energy and reduces the overall energy consumption of the equipment. The fitting structure of the first guide channel 212 and the second guide channel 222 ensures the effective heat exchange between steam and liquid and improves the heat exchange efficiency. When the steam flows in the second flow guiding channel 222, its heat can be quickly transferred to the liquid in the first flow guiding channel 212, thereby promoting the effective use of the steam and the rapid heating of the liquid.

[0044] Preferably, the water receiving tray 240 is tilted toward the first guide channel 212 , so that the liquid to be deoxygenated in the water receiving tray 240 can flow into the first guide channel 212 under the action of its own weight.

[0045] like Figure 5 and Figure 6As shown, the deoxidation assembly 200 further includes: a flow guide component 250, which is arranged in the steam generating chamber 110 and located on the side of the water receiving tray 240, and a hollow cavity 251 is arranged in the flow guide component 250 to form a second flow guide channel 222, and the hollow cavity 251 is connected to the steam generating chamber 110; a groove 252 is arranged on the flow guide component 250, one end of the groove 252 is connected to the water receiving tray 240, and the other end is connected to the steam generating chamber 110, and at least part of the groove 252 is the first flow guide channel 212; the groove 252 and / or the hollow cavity 251 extend along a spiral track. The hollow cavity 251 of the flow guide component 250 is connected to the steam generating chamber 110, forming a second flow guide channel 222, and steam can flow from the hollow cavity 251 to fully exchange heat with the liquid in the groove 252. This spiral trajectory design increases the contact path length of steam and liquid, helps to evenly distribute the liquid and form a turbulent state, thereby increasing the turbulence of the liquid, thereby improving the heat exchange efficiency and deoxygenation effect. Steam contacts the liquid through the hollow cavity, further accelerating the escape of dissolved oxygen in the water and the discharge of non-condensable gases.

[0046] The casing 100 is provided with an exhaust pipe 140, which is connected to the steam generating chamber 110, and the steam in the steam generating chamber 110 is discharged through the exhaust pipe 140; the flow guide component 250 includes: a connecting end plate 253, on which a plurality of second connecting holes 2530 are provided, and the groove 252 is connected to the water receiving tray 240 through each of the second connecting holes 2530; a steam connecting port, which is provided on the connecting end plate 253, and is connected to the exhaust pipe 140 and the hollow cavity 251 respectively. The connection between the exhaust pipe 140 and the steam connecting port ensures that the steam in the steam generating chamber can be smoothly discharged through the exhaust pipe 140. At the same time, the steam connecting port is also connected to the hollow cavity, which means that part of the steam can be diverted again to participate in the heating process of the liquid. The groove 252 of the guide component 250 is connected to the water receiving tray through the second connecting hole 2530, so that after the liquid to be deoxygenated converges in the water receiving tray, it can enter the groove 252 of the guide component 250 through these second connecting holes 2530 and flow along a specific path.

[0047] Specifically, the deoxygenation component 200 also includes a connecting pipe 280, the two ends of which are respectively connected to the exhaust pipe 140 and the steam connecting port. The connecting pipe 280 is used to introduce part of the steam into the hollow cavity 251 to participate in the deoxygenation process. A pump body 281 is also provided on the connecting pipe 280, and the pump body 281 is used to generate power to introduce the steam in the exhaust pipe 140 into the connecting pipe 280.

[0048] The design of the flow guide component 250 allows the steam and liquid to interact more fully at different stages. The steam in the steam generating chamber 110 can also directly heat the liquid in the water receiving tray, forming multiple heat exchange and deoxygenation processes, thereby improving the overall performance of the steam deoxygenation system. The integrated design of the flow guide component 250 reduces the number of pipe joints and complex fluid paths, improves the system's integration, and reduces the failure rate and maintenance costs. At the same time, by controlling the flow paths of steam and liquid, it helps maintain the stable operation of the system and avoids fluid fluctuations and overheating of the equipment.

[0049] In the present application, the flow guide component 250 further includes: a discharge end plate 255, on which a third connecting hole 2550 is provided; the deoxidation assembly 200 further includes: a drainage pipe 260, which is provided below the flow guide component 250 and communicates with the hollow cavity 251 through the third connecting hole 2550, and the drainage pipe 260 is provided with a plurality of exhaust holes 2601, and the steam in the hollow cavity 251 is discharged into the steam generating chamber 110 through each exhaust hole 2601. The third connecting hole 2550 provided on the discharge end plate 255 of the flow guide component 250 is connected to the hollow cavity 251, so that the steam in the hollow cavity 251 can be uniformly discharged through the drainage pipe 260 below the flow guide component 250. The design of multiple exhaust holes 2601 on the drainage pipe 260 is conducive to the dispersed discharge of steam, thereby forming a more uniform steam distribution in the steam generating chamber 110, which not only improves the heating efficiency of the liquid in the steam generating chamber, but also promotes the recycling and reuse of steam. When the steam in the hollow cavity 251 is discharged into the steam generating chamber through the exhaust holes 2601, it can further contact with the liquid to be deoxygenated flowing in the chamber, accelerate the escape of dissolved oxygen in the liquid, and thus improve the deoxygenation effect of the deoxygenation component. The design of the exhaust holes 2601 can automatically adjust the steam discharge according to the pressure and liquid level changes in the steam generating chamber, thereby improving the flexibility of operation.

[0050] There are multiple third connecting holes 2550, and the multiple third connecting holes 2550 are arranged at intervals along the length direction of the discharge end plate 255. There are multiple drainage pipes 260, and the multiple drainage pipes 260 are arranged in a one-to-one correspondence with the multiple third connecting holes 2550. The multiple third connecting holes 2550 are arranged at intervals along the length direction of the discharge end plate 255, which can ensure that when the steam is discharged from the steam generating chamber 110, its discharge points are evenly distributed along the end plate, avoiding the temperature and pressure unevenness caused by excessive local steam discharge, and improving the uniformity and stability of steam discharge. Each third connecting hole 2550 corresponds to a drainage pipe 260, which means that after being discharged, the steam can be redirected back to the steam generating chamber 110 or guided to other parts that require steam heating through these drainage pipes.

[0051] A plurality of fourth connecting holes 2520 are arranged on the bottom surface of the groove 252, and the plurality of fourth connecting holes 2520 are arranged at intervals along the extension direction of the groove 252. Each fourth connecting hole 2520 is connected to the hollow cavity 251, and part of the steam in the hollow cavity 251 overflows into the groove 252 through the fourth connecting hole 2520 to heat the second part of the liquid to be deoxygenated. The presence of the fourth connecting hole allows part of the steam in the hollow cavity to overflow into the groove and directly contact with the second part of the liquid to be deoxygenated, increasing the contact area and time between the steam and the liquid, thereby significantly improving the heat exchange efficiency. This design ensures that the liquid can be more fully heated when passing through the groove, accelerates the escape of dissolved oxygen, and improves the deoxygenation effect. The fourth connecting holes are arranged at intervals, which helps to form a series of tiny turbulent areas in the groove, enhances the turbulence of the liquid, improves the fluidity of the liquid, helps the dissolved oxygen to escape quickly from the liquid, and improves the deoxygenation efficiency. In addition, this design can also reduce the residence time of the liquid in the groove, avoiding local concentration and corrosion problems.

[0052] like Figure 8 and Fig. 9 As shown, the deoxygenation assembly 200 also includes: a spoiler 270, which is arranged on the bottom surface of the groove 252, and the spoiler 270 includes a guide surface 2701, at least part of which is a curved surface, and the second part of the liquid to be deoxygenated in the groove 252 is guided by the curved surface; wherein, there are multiple spoilers 270, and multiple spoilers 270 are arranged at intervals along the extension direction of the groove 252. The curved surface design of the spoiler can change the flow state of the liquid to be deoxygenated in the groove, generate more turbulence, and increase the surface renewal rate of the liquid. The turbulent state of the liquid helps to break the tension of the liquid surface and accelerate the escape of dissolved oxygen, thereby improving the deoxygenation effect. The setting of the spoiler increases the flow path length of the liquid in the groove and prolongs the contact time between the liquid and the steam, which helps to achieve more sufficient heat exchange in a limited space, improve the heating efficiency of the liquid, and promote the complete escape of dissolved oxygen. The turbulent state of the liquid helps to reduce the formation of scale. In traditional steam generators, due to the poor flow of liquid, it is easy to form scale in some areas, affecting the heat exchange efficiency and equipment life. The setting of the spoiler can effectively reduce the formation of scale and extend the service life of the equipment.

[0053] The spoiler component 270 includes: a spoiler body 271, which is arranged in the groove 252, and at least a part of the guide surface 2701 is arranged on the spoiler body 271; a support foot 272, which is arranged on the spoiler body 271, and at least a part of the support foot 272 is in contact with the bottom surface of the groove 252; an extension plate 273, which is arranged on the spoiler body 271, and the extension plate 273 extends from the spoiler body 271 toward the direction close to the bottom surface of the groove to form a guide space between the extension plate 273, the support foot 272 and the bottom surface of the groove. The spoiler body is arranged in the groove, and the guide surface thereon can change the flow state of the liquid. Through the spoiler effect, the turbulence of the liquid when flowing through the groove is increased, and the contact area between the liquid and the steam is increased, thereby improving the heat exchange efficiency. In particular, in a specific area of ​​the groove, the turbulence of the liquid makes it easier for dissolved oxygen and non-condensable gases to escape, thereby enhancing the deoxygenation effect. The support legs and the extension plate can be firmly fixed in the groove, while reducing the contact area between the spoiler body 271 and the groove 252, thereby preventing the spoiler body 271 from absorbing too much heat, thereby reducing the deoxidation effect.

[0054] In the embodiment provided in the present application, the guide component 250 also includes an intermediate end plate 254, the two ends of the intermediate end plate 254 are respectively connected to the connecting end plate 253 and the discharge end plate 255, the intermediate end plate 254 extends in a spiral structure, the discharge end plate 255 includes a connecting end and a free end, the connecting end of the discharge end plate 255 is connected to the intermediate end plate 254, the free end of the discharge end plate 255 is opposite to and spaced from the bent portion of the intermediate end plate 254, a discharge port 256 is formed between the free end of the discharge end plate 255 and the bent portion of the intermediate end plate 254, the groove 252 is connected to the discharge port 256, so that the second part of the liquid to be deoxygenated in the groove 252 is discharged into the steam generating chamber 110 through the discharge port after deoxygenation is completed. Preferably, the connecting end plate 253 , the middle end plate 254 and the discharge end plate 255 are an integrated structure, and the second connecting hole 2530 is arranged on the plate body of the side wall surface of the connecting end plate 253 forming the groove 252 to facilitate the liquid in the water receiving tray 240 to flow into the groove 252 .

[0055] In the present application, the steam generator also includes a steam inlet pipe 150, a drain pipe 160, a partition plate 170 and a filter component 180. The steam inlet pipe 150 and the drain pipe 160 are respectively connected to the heat exchange tube bundle 130. The steam inlet pipe 150 is used to supply high-temperature refrigerant steam to the heat exchange tube bundle 130, and the drain pipe 160 is used to discharge liquid refrigerant steam. The partition plate 170 is arranged in the casing 100, between the steam generating chamber 110 and the circulation chamber, and the steam inlet pipe 150 and the drain pipe 160 are respectively connected to the heat exchange tube bundle 130 through the circulation chamber.

[0056] contrast Fig.10 and Fig.11It can be seen that the existing conventional steam generator system needs to be additionally configured with an independent thermal deoxygenation system, which is generally large in size and has many pipelines. This increases the complexity of the system to a certain extent and cannot achieve the goal of miniaturization of the equipment. At the same time, the high-temperature steam generated will no longer participate in the circulation after completing the deoxygenation of the feed water, resulting in steam waste. In order to solve the above problems, the present application adopts a built-in thermal deaerator, which relies on a three-stage four-fold deoxygenation measure to greatly improve the feed water deoxygenation effect. In addition, the present application adopts an integrated design, which can realize the recycling of high-temperature steam and effectively reduce steam waste and system size.

[0057] In the present application, the deoxygenation channel for deoxygenation is in the shape of a "U" as a whole, so as to maximize the heat exchange time between the internal steam and the external water supply within a limited space. The deoxygenation channel is divided into a steam channel and a water supply channel. Figure 7 As shown, the steam channel is in a closed "concave" shape, and the water supply channel is open.

[0058] In specific implementation, high-temperature refrigerant steam enters the tube side from the steam inlet pipe 150, heats the water in the shell side into steam, and the generated steam passes through the filter component 180 and is discharged through the exhaust pipe 140 in sequence. At the same time, external water is supplied to the shell side through the nozzle of the liquid inlet part 120 to continuously replenish the water volume, and the high-temperature refrigerant steam is cooled into liquid and discharged through the liquid discharge pipe 160. In the above process, the external water supply deoxygenation process is divided into three sections, namely, the spray deoxygenation section, the film deoxygenation section and the bubbling deoxygenation section.

[0059] For the spray deoxygenation section, the feed water entering the shell side from the liquid inlet 120 is rapidly atomized, which greatly increases the steam-water contact area and strengthens the heat exchange with the steam generated outside the lower heat exchange tube (here the steam moves upward through the support tube 230 to exchange heat with the water droplets), ensuring the initial deoxygenation effect of the feed water. However, since the water droplets are too small, the surface tension will prevent the diffusion of oxygen. For this reason, a feed water film deoxygenation section is designed, which relies on dispersing the feed water into a water film, thereby reducing the surface tension of the droplets and achieving the removal of residual oxygen.

[0060] For the film-forming deoxygenation section, the feed water that has undergone preliminary deoxygenation is blocked by the baffle 213 and gathers downward in the water storage area formed by the guide plate 211 and the support tube 230. It flows through the first flow hole 2110 on the guide plate 211 to the inclined outer surface of the support tube 230 and forms a large liquid film, and finally gathers in the water receiving tray 240. The steam generated outside the lower heat exchange tube passes through the inner surface of the support tube 230, and exchanges heat with the liquid film on the outer surface to achieve the purpose of secondary deoxygenation. The feed water collected in the water receiving tray 240 enters its feed water channel through the second connecting hole 2530 at the end of the connecting end plate 253, and part of the steam discharged from the exhaust pipe 140 enters the steam channel in the connecting end plate 253 through the pump body 281 and the connecting pipeline 280, and exchanges heat with the water in the feed water channel to achieve the purpose of tertiary deoxygenation. A small amount of steam will enter the upper liquid film through the tiny opening (fourth connecting hole 2520) at the bottom of the water supply channel, disturbing the water flow and further enhancing the deoxygenation effect. At the same time, due to the presence of the flow-disturbing component 270, the flow state in the water supply channel is constantly changing, and the turbulence and heat exchange efficiency are greatly improved, thereby enhancing the deoxygenation effect.

[0061] For the bubbling deoxygenation section, since the opening area of ​​the drainage pipe 260 is completely immersed in the shell-side water, the steam entering the second guide channel 222 will be sprayed from the opening to the shell-side water, allowing the steam to further contact the shell-side water, thereby enhancing heat exchange and bringing out the dissolved oxygen and non-condensable gases in the water, thereby achieving the purpose of four-time deoxygenation.

[0062] In summary, this application can greatly improve the deoxygenation effect of the water supply through the three-stage four-fold deoxygenation measures. At the same time, the present invention adopts an integrated design, which can realize the recycling of high-temperature steam, effectively reducing steam waste and system size. In addition, the built-in thermal deaerator can also prevent liquid water from being discharged with the generated steam, greatly reducing the degree of liquid in the air and improving the output steam quality.

[0063] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0064] The steam generator provided in the present application includes a casing 100 and a deoxygenation component 200. The deoxygenation component 200 is arranged in a steam generating chamber 110. The deoxygenation component 200 includes a liquid flowing portion 210 and a steam flowing portion 220. At least a portion of the liquid flowing portion 210 is in contact with the steam flowing portion 220, so that the steam in the steam flowing portion 220 heats the liquid to be deoxygenated in the liquid flowing portion 210 for deoxygenation. The steam inlet and the steam outlet of the steam flowing portion 220 are respectively connected to the steam generating chamber 110, so that the steam in the steam generating chamber 110 flows through the steam flowing portion 220 and then flows back into the steam generating chamber 110. This arrangement does not require a separate deoxygenation piping system to be installed outside the casing 100, and the deoxygenation component 200 can be directly installed in the steam generating chamber 110, which not only simplifies the system structure, but also reduces the occupied space. In addition, the steam inlet and the steam outlet of the steam circulation part 220 are respectively connected to the steam generating chamber 110. After the deoxygenation work is completed, the steam in the steam circulation part 220 flows back to the steam generating chamber 110 through the steam outlet, instead of being directly discharged or no longer circulated like the traditional system. This not only reduces the waste of steam, but also improves the utilization efficiency of steam and reduces the overall energy consumption of the equipment. The fitting design of the liquid circulation part 210 and the steam circulation part 220 ensures sufficient contact between the steam and the liquid to be deoxygenated, thereby improving the deoxygenation efficiency. By directly utilizing the steam in the steam generating chamber for deoxygenation, it avoids the need for an additional independent thermal deoxygenation system, thereby simplifying the system structure.

[0065] The application uses a built-in thermal deaerator, which can effectively reduce the oxygen content of the feed water and slow down metal oxidation corrosion. At the same time, the quadruple deaeration measures can greatly improve the deaeration effect; multiple deaeration measures are adopted to greatly improve the deaeration efficiency. The internal space of the steam generator is fully utilized to promote the miniaturization of the system. The generated high-temperature steam still participates in the circulation after completing the deaeration of the feed water, reducing the waste of steam.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam generator, characterized in that: include: A casing (100), wherein a steam generating chamber (110) is provided in the casing (100); A deoxygenation component (200) is arranged in the steam generating chamber (110), the deoxygenation component (200) comprising a liquid circulation portion (210) and a steam circulation portion (220), at least a portion of the liquid circulation portion (210) being in contact with the steam circulation portion (220), so that the steam in the steam circulation portion (220) heats the liquid to be deoxygenated in the liquid circulation portion (210) to perform deoxygenation; The steam inlet and the steam outlet of the steam circulation portion (220) are respectively connected to the steam generating chamber (110), so that the steam in the steam generating chamber (110) flows through the steam circulation portion (220) and then flows back into the steam generating chamber (110); The steam generator further comprises a liquid inlet (120) and a heat exchange tube bundle (130); at least a portion of the liquid inlet (120) is disposed in the steam generating chamber (110) so as to spray the liquid to be deoxygenated into the steam generating chamber (110); the steam circulation portion (220) comprises: a mixed flow channel (221), at least partially disposed between the liquid inlet portion (120) and the heat exchange tube bundle (130), the mixed flow channel (221) being used to circulate a first portion of steam to mix with a first portion of liquid to be deoxygenated falling into the mixed flow channel (221) and to heat the first portion of liquid to be deoxygenated; The deoxidation component (200) further comprises: a support cylinder (230) disposed in the steam generating chamber (110); the mixed flow channel (221) disposed in the support cylinder (230); and along the flow direction of the first portion of steam, the cross-sectional area of ​​the flow cross section of the mixed flow channel (221) gradually decreases.

2. The steam generator according to claim 1, characterized in that: The liquid circulation part (210) comprises: a guide plate (211) arranged on the outer wall surface of the support tube (230) and located at the top end of the support tube (230); the guide plate (211) is arranged around the support tube (230); at least a portion of the guide plate (211) is opposite to the liquid inlet portion (120) so as to carry the second portion of the liquid to be deoxygenated sprayed into the liquid inlet portion (120); A first flow hole (2110) is provided between the guide plate (211) and the support tube (230), and the second part of the liquid to be deoxygenated flows along the outer wall surface of the support tube (230) through the first flow hole (2110). During this process, the second part of the liquid to be deoxygenated on the outer wall surface of the support tube (230) is heated by the first part of the steam in the mixed flow channel (221); There are a plurality of the first circulation holes (2110), and the plurality of the first circulation holes (2110) are arranged at intervals along the circumference of the support tube (230).

3. The steam generator according to claim 1, characterized in that: The deoxygenation component (200) further comprises: a water receiving tray (240), the water receiving tray (240) being provided with a first avoidance opening (2401), the support cylinder (230) being provided on the water receiving tray (240) and being in communication with the first avoidance opening (2401), and the second portion of the liquid to be deoxygenated sprayed by the liquid inlet portion (120) being sprayed into the water receiving tray (240) for confluence; The liquid circulation part (210) further includes: a first flow guiding channel (212), the first flow guiding channel (212) being in communication with the water receiving tray (240), and the second portion of the liquid to be deoxygenated in the water receiving tray (240) flows into the first flow guiding channel (212); The steam circulation part (220) further includes: The second flow guiding channel (222) is in contact with the first flow guiding channel (212), and the second flow guiding channel (222) is used to guide the second part of the steam so as to heat the second part of the liquid to be deoxygenated in the first flow guiding channel (212).

4. The steam generator according to claim 3, characterized in that: The deoxidation component (200) further comprises: a flow guide component (250) arranged in the steam generating chamber (110) and located on the side of the water receiving tray (240); a hollow cavity (251) is arranged in the flow guide component (250) to form the second flow guide channel (222); the hollow cavity (251) is in communication with the steam generating chamber (110); The flow guide component (250) is provided with a groove (252), one end of the groove (252) is in communication with the water receiving tray (240), and the other end is in communication with the steam generating chamber (110), and at least a portion of the groove (252) is the first flow guide channel (212); The groove (252) and / or the hollow cavity (251) extend along a spiral trajectory.

5. The steam generator according to claim 4, characterized in that: The casing (100) is provided with a steam exhaust pipe (140), the steam exhaust pipe (140) being in communication with the steam generating chamber (110), and the steam in the steam generating chamber (110) is discharged through the steam exhaust pipe (140); the flow guiding component (250) comprises: A connecting end plate (253), wherein a plurality of second communication holes (2530) are provided on the connecting end plate (253), and the groove (252) is connected to the water receiving tray (240) through each of the second communication holes (2530); A steam communication port is provided on the connecting end plate (253), and the steam communication port is communicated with the exhaust pipe (140) and the hollow cavity (251) respectively.

6. The steam generator according to claim 4, characterized in that: The flow guide component (250) further comprises: a discharge end plate (255), wherein the discharge end plate (255) is provided with a third communication hole (2550); The deoxidation component (200) further comprises: A drainage pipe (260) is arranged below the flow guide component (250) and is connected to the hollow cavity (251) through the third connecting hole (2550); a plurality of exhaust holes (2601) are provided on the drainage pipe (260); and the steam in the hollow cavity (251) is discharged into the steam generating chamber (110) through each of the exhaust holes (2601).

7. The steam generator according to claim 6, characterized in that: There are a plurality of the third connecting holes (2550), and the plurality of the third connecting holes (2550) are arranged at intervals along the length direction of the discharge end plate (255); there are a plurality of the drainage pipes (260), and the plurality of the drainage pipes (260) are arranged in a one-to-one correspondence with the plurality of the third connecting holes (2550).

8. The steam generator according to claim 5, characterized in that: A plurality of fourth connecting holes (2520) are arranged on the bottom surface of the groove (252), and the plurality of fourth connecting holes (2520) are arranged at intervals along the extension direction of the groove (252), and each of the fourth connecting holes (2520) is connected to the hollow cavity (251), and part of the steam in the hollow cavity (251) overflows into the groove (252) through the fourth connecting holes (2520) to heat the second part of the liquid to be deoxygenated.

9. The steam generator according to claim 5, characterized in that: The deoxidation component (200) further comprises: a flow-disturbing component (270) disposed on the bottom surface of the groove (252), the flow-disturbing component (270) comprising a flow-guiding surface (2701), at least a portion of the flow-guiding surface (2701) being a curved surface, and the second portion of the liquid to be deoxygenated in the groove (252) is guided by the curved surface; There are a plurality of spoiler components (270), and the plurality of spoiler components (270) are arranged at intervals along the extension direction of the groove (252).

10. The steam generator according to claim 9, characterized in that The spoiler component (270) comprises: A spoiler body (271) is arranged in the groove (252), and at least a portion of the flow guide surface (2701) is arranged on the spoiler body (271); A support foot (272) is disposed on the spoiler body (271), and at least a portion of the support foot (272) is in contact with the bottom surface of the groove (252). An extension plate (273) is arranged on the spoiler body (271), and the extension plate (273) extends from the spoiler body (271) in a direction close to the bottom surface of the groove, so as to form a flow guide space between the extension plate (273), the support foot (272) and the bottom surface of the groove.

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