Deoxidizing device for steam circulating system

Abstract

The utility model provides a deoxygenization device for a steam circulation system, which comprises a water tank and a deoxygenization head mounted at the top of the water tank, the deoxygenization head is internally provided with a rotating film device, a water spraying assembly and a filler liquid steam net from top to bottom in sequence, the top of the deoxygenization head is provided with an exhaust port, the side of the deoxygenization head is provided with a water inlet and a steam inlet, and the water inlet is communicated with the water tank. The water inlet comprises a condensed water inlet and a make-up water inlet which are communicated with the rotating film device, and a high-pressure heater drainage inlet formed above the water spraying assembly, and the steam inlet comprises a first-stage steam inlet communicated with the rotating film device and a second-stage steam inlet formed below the filler liquid-steam net; the high-pressure heater drainage inlet is connected with a water inlet pipe, and the water inlet pipe comprises a water inlet connector and a flow stabilizing cover arranged at the tail end of the water inlet connector. According to the deoxygenization device, the water inlet pipe is arranged at the high-pressure heater drain water inlet, the flow stabilizing cover is arranged at the tail end of the water inlet pipe, the high-speed flow state of high-pressure heater drain water is changed, and the deoxygenization rate and the system operation stability are effectively improved.

Description

Technical Field

[0001] This application relates to the field of deoxygenation equipment technology, specifically to a deoxygenation device for a steam circulation system. Background Technology

[0002] The water in steam circulation systems typically contains non-condensable gases such as dissolved oxygen and carbon dioxide. These gases have a strong corrosive effect on metallic materials under high temperature and pressure conditions, leading to oxygen corrosion, pitting corrosion, and even stress corrosion cracking in equipment such as pipes, boilers, and steam turbines, seriously affecting the safe and stable operation and service life of the equipment.

[0003] Currently, commonly used deaerators mainly include thermal deaerators and vacuum deaerators. Thermal deaerators heat feedwater to its saturation temperature and use steam to strip away dissolved gases, reducing the solubility of gases in the water and releasing them through an exhaust port. Existing technologies often use straight-through inlets for the inlet of thermal deaerators. However, the feedwater sources in steam circulation systems are diverse, such as condensate, demineralized water makeup, and high-pressure heater condensate. High-pressure heater condensate, in particular, has a large pressure differential and high flow velocity due to the condensation process, which can directly impact the internal structure of the deaerator upon entering, reducing system stability. Furthermore, the uneven contact between high-pressure heater condensate and other water sources and steam results in low deaeration efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a deoxygenation device for a steam circulation system, which can improve the deoxygenation rate and system operation stability.

[0005] This application is achieved through the following technical solution, specifically:

[0006] A deaerator for a steam circulation system includes: a water tank and a deaerator head installed on top of the water tank. The deaerator head contains, from top to bottom, a swirl film generator, a water spray assembly, and a packing liquid-vapor mesh. The top of the deaerator head has an exhaust port, and the side has a water inlet and a steam inlet. The water inlet includes a condensate inlet and a makeup water inlet connected to the swirl film generator, and a high-pressure heater condensate drain inlet located above the water spray assembly. The steam inlet includes a primary steam inlet connected to the swirl film generator and a secondary steam inlet located below the packing liquid-vapor mesh. The high-pressure heater condensate drain inlet is connected to a water inlet pipe, which includes a water inlet connector and a flow stabilizer at the end of the water inlet connector.

[0007] In this scheme, by installing a connecting inlet pipe at the high-pressure heater's condensate inlet and equipping its end with a flow stabilizer, the high-speed flow pattern of the condensate is altered, dispersing its originally concentrated impact force. This significantly reduces the direct high-speed impact of the condensate on the internal walls or components of the deaerator. Furthermore, the condensate treated by the flow stabilizer can enter the water distribution assembly more gently, allowing for more thorough and uniform contact with condensate, makeup water, or steam, which helps improve the initial deaeration efficiency.

[0008] As an improvement to the flow stabilizer in this application, the flow stabilizer has a U-shaped structure and multiple through holes are evenly distributed on the flow stabilizer.

[0009] As an improvement to the water inlet pipe in this application, the water inlet pipe further includes an extension pipe connected to the water inlet connector, and a flow stabilizer is connected to the end of the extension pipe away from the water inlet connector.

[0010] Furthermore, the outer wall of the connection end of the water inlet connector and the extension pipe is provided with a corresponding annular flange, and an annular clamp is installed on the annular flange.

[0011] As an improvement to the flow stabilizer in this application, the flow stabilizer is provided with an annular protrusion on the top, and the inner wall of the extension tube is provided with an annular retainer that matches the annular protrusion.

[0012] Furthermore, the inner wall of the annular card holder is provided with an annular sealing groove, and an O-ring is embedded in the sealing groove.

[0013] As an improvement to the water inlet pipe in this application, the diameter of the through hole of the flow stabilizer connected to the extension pipe is smaller than the diameter of the through hole of the flow stabilizer at the end of the water inlet connector.

[0014] The beneficial effects of this application are as follows:

[0015] The solution proposed in this application alters the high-speed flow pattern of the high-pressure heater condensate by installing a connecting inlet pipe at the condensate inlet and a flow stabilizer at its end. This disperses the originally concentrated impact force, significantly reducing the direct high-speed impact of the condensate on the internal walls or components of the deaerator. Furthermore, the condensate treated by the flow stabilizer can enter the water distribution assembly more gently, allowing for more thorough and uniform contact with condensate, makeup water, or steam, thus improving the initial deaeration efficiency.

[0016] In addition to the technical problems solved by this utility model, the technical features constituting the technical solution, and the advantages brought about by the technical features of these technical solutions as described above, other technical problems that this utility model can solve, other technical features contained in the technical solution, and the advantages brought about by these technical features will be further explained in detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a cross-sectional structural schematic diagram of a deaerator for a steam circulation system according to an embodiment of this application;

[0018] Figure 2 This is an exploded view of the water inlet pipe in the embodiment of this application.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Water tank; 2. Deaerator head; 3. Water inlet; 4. Steam inlet; 5. Water inlet pipe; 6. Annular clamp; 21. Rotary film generator; 22. Water spray assembly; 23. Packing liquid-vapor mesh; 24. Exhaust port; 31. Condensate inlet; 32. Makeup water inlet; 33. High-pressure heater drain inlet; 41. Primary steam inlet; 42. Secondary steam inlet; 51. Water inlet connector; 52. Flow stabilizer; 53. Extension pipe; 521. Annular protrusion; 531. Annular clamp. Detailed Implementation

[0021] The following will be combined with the appendix Figures 1-2 The embodiments of the technical solution of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0022] In view of the problems existing in the background technology or products, Figure 1 A cross-sectional structural schematic diagram of a deaerator for a steam circulation system according to an embodiment of this application is shown. Figure 1 As shown in the figure, this application provides a deaerator for a steam circulation system, including: a water tank 1 and a deaerator head 2 installed on the top of the water tank 1. The deaerator head 2 has a swirl film generator 21, a water spray assembly 22 and a packing liquid-vapor mesh 23 arranged sequentially from top to bottom inside. The top of the deaerator head 2 has an exhaust port 24, and the side has a water inlet 3 and a steam inlet 4. The water inlet 3 includes a condensate inlet 31 and a makeup water inlet 32 ​​connected to the swirl film generator 21, and a high-pressure heater condensate drain inlet 33 opened above the water spray assembly 22. The steam inlet 4 includes a primary steam inlet 41 connected to the swirl film generator 21 and a secondary steam inlet 42 opened below the packing liquid-vapor mesh 23. The high-pressure heater condensate drain inlet 33 is connected to a water inlet pipe 5. The water inlet pipe 5 includes a water inlet connector 51 and a flow stabilizer shroud 52 disposed at the end of the water inlet connector 51.

[0023] Specifically, the inlet pipe 5 is connected to the high-pressure heater condensate inlet 33 via a flange. The condensate from the high-pressure heater typically has high pressure and flow velocity. If a traditional straight-through or simple elbow inlet is used, the condensate will form a high-speed jet that directly impacts the internal wall or components of the deaerator head 2. The flow stabilizer shroud 52 can disperse the originally concentrated high-speed jet into multiple lower-velocity or directionally dispersed fluid streams, thus buffering the high-speed fluid. This flow stabilization and dispersion significantly reduces the direct impact force of the condensate on the internal structure of the deaerator head 2, thereby effectively reducing wear inside the equipment and reducing vibration and noise caused by high-speed fluid impact, improving the overall operational stability of the deaerator. Furthermore, the condensate treated by the flow stabilizer shroud 52 can enter the water spray assembly 22 more smoothly, allowing for more thorough and uniform contact with condensate, makeup water, or steam, which is beneficial for improving the initial deaerator efficiency.

[0024] Figure 2 An exploded view of the water inlet pipe in an embodiment of this application is shown. Figure 2 As shown, in one implementation, the flow stabilizer 52 has a U-shaped structure and multiple through holes are evenly distributed on the flow stabilizer 52.

[0025] Specifically, the opening of the flow stabilizer 52 faces the water inlet connector 51. Compared with the spherical structure, the U-shaped structure has a certain depth, which can effectively receive and contain the high-speed fluid ejected from the water inlet connector 51, decomposing the concentrated high-speed jet into multiple fluid bundles with lower kinetic energy and different outflow directions, making it easier for the high-pressure heater hydrophobic to fully and evenly contact the condensate, makeup water sprayed down by the water spraying assembly 22 and the steam rising from below.

[0026] Continue reading Figure 2 In one implementation, the water inlet pipe 5 further includes an extension pipe 53 connected to the water inlet connector 51, and the end of the extension pipe 53 away from the water inlet connector 51 is connected to a flow stabilizer 52.

[0027] Specifically, the extension pipe 53 allows the flow stabilizer 52 to no longer be adjacent to the side wall of the water inlet connector 51 or the deaerator head 2, but instead pushes it into a deeper, more open area inside the deaerator head 2, such as directly above the water spray assembly 22 or at a position where it more fully intersects with the rising steam flow path. Fluid dispersion in this more in-depth position ensures that the high-pressure heater condensate enters the main deaerator reaction zone at a lower speed and in a dispersed state, making it easier for it to fully and uniformly mix and contact with the water spray generated by the water spray assembly 22 and the steam rising from the lower secondary steam inlet 42, thereby significantly improving heat and mass transfer efficiency. Preferably, the outer wall of the connection end between the water inlet connector 51 and the extension pipe 53 is provided with a corresponding annular flange, and an annular clamp 6 is installed on the annular flange.

[0028] Preferably, the diameter of the through hole of the flow stabilizer 52 connected to the extension pipe 53 is smaller than the diameter of the through hole of the flow stabilizer 52 at the end of the water inlet connector 51.

[0029] Specifically, the flow stabilizer 52 at the end of the inlet connector 51 achieves initial flow diversion and buffering through a larger diameter through-hole, decomposing the concentrated jet of the high-pressure heater hydrophobicity into multiple medium-speed fluid streams. These fluid streams pass through the buffer chamber formed between adjacent flow stabilizers 52 and enter the flow stabilizer 52 at the end of the extension tube 53. At this point, using a smaller diameter through-hole forces secondary resistance as the fluid passes through, further reducing the fluid velocity. Simultaneously, the smaller through-hole size reduces the flow rate of each outlet, forming a greater number of finer fluid streams. This multi-stage dispersion structure ensures that the high-pressure heater hydrophobicity is already in a low-speed, highly dispersed state when entering the area below the water spray assembly 22, allowing for sufficient contact with the water droplets sprayed by the water spray assembly 22 and the rising steam from the secondary steam inlet 42, extending the mass transfer time and expanding the contact area, thereby removing dissolved oxygen more efficiently. Optionally, the number of extension tubes 53 can be one or more.

[0030] In one implementation, the top of the flow stabilizer 52 is provided with an annular protrusion 521, and the inner wall of the extension tube 53 is provided with an annular retainer 531 that matches the annular protrusion 521.

[0031] Specifically, the engaging design of the annular protrusion 521 and the annular retainer 531 simplifies the installation process. Initial positioning can be achieved by directly pushing the flow stabilizer 52 into the end of the extension tube 53. The annular protrusion 521 and the annular retainer 531, through a circumferentially evenly distributed engaging structure, fix the flow stabilizer 52 to the predetermined position at the end of the extension tube 53. This prevents the impact force generated by the high-speed flow of the high-pressure heater's hydrophobic material from causing axial movement or radial displacement of the flow stabilizer 52 within the extension tube 53, ensuring that the through-hole of the flow stabilizer 52 is always within the optimal dispersion area inside the deaerator 2. Simultaneously, the mating surfaces of the annular protrusion 521 and the annular retainer 531 form a preliminary sealing interface, reducing fluid leakage from the gap between the flow stabilizer 52 and the extension tube 53. Preferably, the inner wall of the annular retainer 531 is provided with an annular sealing groove, and an O-ring is embedded in the sealing groove. The combination of the annular sealing groove and the O-ring further enhances the sealing performance between the flow stabilizer 52 and the extension tube 53. When the annular protrusion 521 is inserted into the annular retainer 531, the O-ring is deformed under pressure to fill the tiny gap between the two, effectively preventing leakage caused by pressure difference during high-speed flow of the high-pressure hydrophobic material, and further improving the overall impact resistance of the structure.

[0032] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set", "equipped with", "connected", and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An oxygen removing device for a steam cycle system, characterized by comprising: include: A water tank (1) and a deaerator head (2) installed on the top of the water tank (1). The deaerator head (2) is provided with a swirl film generator (21), a water spray assembly (22) and a packing liquid vapor mesh (23) arranged from top to bottom. The top of the deaerator head (2) is provided with an exhaust port (24), and the side is provided with a water inlet (3) and a steam inlet (4). The water inlet (3) includes a condensate inlet (31) and a makeup water inlet (32) connected to the swirl film generator (21). The steam inlet (4) includes a high-pressure heater hydrophobic inlet (33) located above the water spraying assembly (22), and a primary steam inlet (41) connected to the swirl film generator (21) and a secondary steam inlet (42) located below the packing liquid-vapor network (23). The high-pressure heater hydrophobic inlet (33) is connected to a water inlet pipe (5), which includes a water inlet connector (51) and a flow stabilizer (52) located at the end of the water inlet connector (51).

2. The oxygen scavenging device of claim 1, wherein The flow stabilizer (52) has a U-shaped structure and multiple through holes are evenly distributed on the flow stabilizer (52).

3. The deoxygenation device as described in claim 2, characterized in that, The water inlet pipe (5) also includes an extension pipe (53) connected to the water inlet connector (51), and a flow stabilizer (52) is connected to one end of the extension pipe (53) away from the water inlet connector (51).

4. The oxygen scavenging device of claim 3, wherein The outer wall of the connection end of the water inlet connector (51) and the extension pipe (53) is provided with a corresponding annular flange, and an annular clamp (6) is installed on the annular flange.

5. The oxygen scavenging device of claim 3, wherein The top of the flow stabilizer (52) is provided with an annular protrusion (521), and the inner wall of the extension tube (53) is provided with an annular seat (531) that matches the annular protrusion (521).

6. The oxygen scavenging device of claim 5, wherein The inner wall of the annular card holder (531) is provided with an annular sealing groove, and an O-ring is embedded in the sealing groove.

7. The oxygen scavenging device of claim 3, wherein The diameter of the through hole of the flow stabilizer (52) connected to the extension pipe (53) is smaller than the diameter of the through hole of the flow stabilizer (52) at the end of the water inlet connector (51).

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