Steam assisted atomizing multi-nozzle desuperheater

Abstract

A multi-nozzle desuperheater with steam-assisted atomization belongs to the field of industrial process control equipment technology. It solves the problems of uneven atomization and slow heat exchange between steam and desuperheating water in existing technologies. Key technical points: The desuperheater's middle section is a hollow cylinder, consisting of a middle section outer circumference, an orifice plate, and a nozzle chamber from the outside in. The orifice plate has connecting holes; the inlet pipe connects to the upper end of the middle section outer circumference, and the outlet pipe connects to the lower end. Three stop structures are arranged from top to bottom within the nozzle chamber. A cover plate seals the upper stop structure, the middle stop structure connects to the nozzle orifice plate, and the lower stop structure connects to the outlet orifice plate. Nozzle assemblies are installed on the nozzle orifice plate and the outlet orifice plate, forming an auxiliary steam flow channel between the outlet orifice plate and the nozzle assembly. This invention makes the desuperheating water atomized more uniformly, eliminates coverage blind spots, and the auxiliary steam further improves the atomization effect, ensuring low-load desuperheating performance. The design with no moving parts reduces maintenance frequency and provides higher reliability.

Description

Technical Field

[0001] This utility model relates to the field of industrial process control equipment technology, specifically to a multi-nozzle desuperheater for steam-assisted atomization. Background Technology

[0002] In combined heat and power (CHP) and industrial steam systems, desuperheaters are crucial devices for regulating steam temperature. In a desuperheater, desuperheating water is atomized from nozzles to form a water mist, which mixes thoroughly with superheated steam, absorbs heat, and evaporates, thus lowering the steam temperature.

[0003] Existing desuperheaters mainly employ mechanical atomization or single-nozzle designs, which have limitations. Mechanical atomization nozzles have poor atomization effects at low flow rates, leading to water accumulation and erosion in the pipes; single nozzles cannot adapt to changes in steam flow rate, resulting in uneven temperature field distribution under high temperature and high pressure conditions, which can easily lead to localized low temperatures and cause thermal stress cracks in the pipes; uneven mixing of steam and desuperheating water requires a long mixing pipe downstream to ensure sufficient evaporation of the desuperheating water, increasing the complexity of the system.

[0004] Therefore, there is an urgent need to propose a multi-nozzle desuperheater with steam-assisted atomization to solve the problems of uneven atomization and slow heat exchange between steam and desuperheating water in the existing technology. Utility Model Content

[0005] In view of the above facts, in order to solve the problems of uneven atomization and slow heat exchange between steam and desuperheating water in the prior art, this utility model designs a multi-nozzle desuperheater with steam-assisted atomization.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A multi-nozzle desuperheater for steam-assisted atomization includes an inlet pipe, a middle section of the desuperheater, an outlet pipe, a cover plate, a nozzle orifice plate, a nozzle assembly, a desuperheating water connection pipe, an auxiliary steam connection pipe, an outlet orifice plate, and an auxiliary steam flow channel.

[0008] The desuperheater has a hollow cylinder in the middle section, consisting of a middle section outer perimeter, an orifice plate, and a nozzle chamber from the outside to the inside. The orifice plate has several vertical connecting holes. The inlet pipe is connected to the upper end of the middle section outer perimeter, and the outlet pipe is connected to the lower end of the middle section outer perimeter. The nozzle chamber has three stop structures from top to bottom. The cover plate seals the upper stop structure, the middle stop structure is connected to the nozzle orifice plate, and the lower stop structure is connected to the outlet orifice plate. Several nozzle assemblies are installed on the nozzle orifice plate and the outlet orifice plate, and an auxiliary steam flow channel is formed between the outlet orifice plate and the nozzle assembly.

[0009] The space between the cover plate and the nozzle orifice plate is a desuperheating water chamber. A horizontal desuperheating water hole is provided on one side of the desuperheating water chamber, and the desuperheating water hole is connected to the desuperheating water pipe.

[0010] The space between the nozzle orifice plate and the outlet orifice plate is an auxiliary steam chamber. A horizontal auxiliary steam hole is provided on one side of the auxiliary steam chamber, and the auxiliary steam hole is connected to the auxiliary steam pipe.

[0011] Furthermore: the nozzle orifice plate has several symmetrically arranged circular holes along the circumferential direction, and each circular hole is equipped with a nozzle assembly;

[0012] The outlet orifice plate has circular holes corresponding to the nozzle assembly, and each circular hole is coaxially fitted with the nozzle assembly.

[0013] Furthermore: the nozzle assembly includes a short connecting pipe, a nozzle body, and a nozzle plug;

[0014] The lower end of the short connector is connected to the nozzle body, and the nozzle is plugged into the nozzle body.

[0015] Furthermore: the upper part of the nozzle body is a frustum-shaped water spray seat, the lower end of the water spray seat is an outwardly expanding water spray cover, and the nozzle body is evenly provided with several water spray holes in the circumferential direction, with the outlet of the water spray hole in the inner cavity of the water spray cover.

[0016] Furthermore, the water spray holes are in two sets, and are arranged coaxially and inclined outwards.

[0017] Furthermore: the water spray base is provided with a central hole and a threaded hole at its axis, and the nozzle plug is provided with a cylindrical section and a threaded section, with the central hole cooperating with the cylindrical section and the threaded hole cooperating with the threaded section.

[0018] Furthermore: the lower end of the threaded section of the nozzle plug is a conical rotating body, which forms a gradually narrowing cooling water flow channel with the inner cavity of the water spray cover, and the narrowest part of the end section is the atomizing port.

[0019] The beneficial effects of this utility model are as follows:

[0020] 1. This utility model uses a nozzle assembly to form multiple droplet jets in the outlet pipe, making the droplet distribution more uniform in the entire cross section, the mixing and heat exchange with superheated steam more rapid, the cooling effect better, and the length of the downstream mixing section can be shortened.

[0021] 2. This invention makes the cooling water atomization more uniform, eliminates blind spots in coverage, and uses auxiliary steam to further improve the atomization effect, ensuring cooling performance under low load.

[0022] 3. This utility model has no moving parts, which reduces the frequency of maintenance and has higher reliability. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the present invention;

[0024] Figure 2 for Figure 1 AA section view;

[0025] Figure 3 This is a cross-sectional view of the middle section of the desuperheater of this utility model;

[0026] Figure 4 for Figure 3 Top view;

[0027] Figure 5 This is a cross-sectional view of the nozzle assembly of this utility model;

[0028] Figure 6 This is a cross-sectional view of the nozzle body of this utility model;

[0029] Figure 7 for Figure 6 Top view.

[0030] In the diagram: 1-Inlet pipe, 2-Desuperheater middle section, 3-Outlet pipe, 4-Cover plate, 5-Nozzle orifice plate, 6-Nozzle assembly, 7-Desuperheating water connection pipe, 8-Auxiliary steam connection pipe, 9-Outlet orifice plate, 10-Auxiliary steam flow channel, 21-Outer periphery of middle section, 22-Orifice plate, 23-Connecting hole, 24-Nozzle chamber, 25-Desuperheating water chamber, 26-Desuperheating water hole, 27-Auxiliary steam chamber, 28-Auxiliary steam hole, 61-Short connection pipe, 62-Nozzle body, 63-Nozzle plug, 64-Desuperheating water flow channel, 65-Atomizing port, 621-Water spray seat, 622-Water spray cover, 623-Center hole, 624-Threaded hole, 625-Water spray hole. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] The terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] The preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0035] Example: A multi-nozzle desuperheater for steam-assisted atomization in this example includes an inlet pipe 1, a middle section of the desuperheater 2, an outlet pipe 3, a cover plate 4, a nozzle orifice plate 5, a nozzle assembly 6, a desuperheating water connection pipe 7, an auxiliary steam connection pipe 8, an outlet orifice plate 9, and an auxiliary steam flow channel 10.

[0036] The middle section 2 of the desuperheater is a hollow cylinder, consisting of a middle section outer perimeter 21, an orifice plate 22, and a nozzle chamber 24 from the outside to the inside. The orifice plate 22 has several vertical connecting holes 23. The inlet pipe 1 is connected to the upper end of the middle section outer perimeter 21, and the outlet pipe 3 is connected to the lower end of the middle section outer perimeter 21. The nozzle chamber 24 has three stop structures arranged from top to bottom. The cover plate 4 seals the upper stop structure, the middle stop structure is connected to the nozzle orifice plate 5, and the lower stop structure is connected to the outlet orifice plate 9. Several nozzle assemblies 6 are installed on the nozzle orifice plate 5 and the outlet orifice plate 9. An auxiliary steam flow channel 10 is formed between the outlet orifice plate 9 and the nozzle assembly 6.

[0037] The cover plate 4 and the nozzle orifice plate 5 form a desuperheating water chamber 25. A horizontal desuperheating water hole 26 is provided on one side of the desuperheating water chamber 25, and the desuperheating water hole 26 is connected to the desuperheating water pipe 7.

[0038] The nozzle orifice plate 5 and the outlet orifice plate 9 are located between an auxiliary steam chamber 27. A horizontal auxiliary steam hole 28 is provided on one side of the auxiliary steam chamber 27, and the auxiliary steam hole 28 is connected to the auxiliary steam pipe 8.

[0039] More specifically: the nozzle orifice plate 5 has a plurality of symmetrically arranged circular holes along the circumferential direction, and each circular hole is equipped with a nozzle assembly 6;

[0040] The outlet orifice plate 9 has circular holes corresponding to the nozzle assembly 6, and each circular hole is coaxially fitted with the nozzle assembly 6.

[0041] More specifically: the nozzle assembly 6 includes a short connecting pipe 61, a nozzle body 62, and a nozzle plug 63;

[0042] The lower end of the short tube 61 is connected to the nozzle body 62, and the nozzle plug 63 is inside the nozzle body 62.

[0043] More specifically: the upper part of the nozzle body 62 is a frustum-shaped water spray seat 621, the lower end of the water spray seat 621 is an outwardly expanding water spray cover 622, and the nozzle body 62 is evenly provided with a plurality of water spray holes 625 in the circumferential direction, with the outlet of the water spray hole 625 in the inner cavity of the water spray cover 622.

[0044] More specifically: the water spray holes 625 are in two sets and are arranged coaxially and inclined outwards.

[0045] More specifically: the water spray base 621 is provided with a central hole 623 and a threaded hole 624 at its axis, and the nozzle plug 63 is provided with a cylindrical section and a threaded section. The central hole 623 is engaged with the cylindrical section, and the threaded hole 624 is engaged with the threaded section.

[0046] More specifically: the lower end of the threaded section of the nozzle plug 63 is a conical rotating body, which forms a gradually narrowing cooling water channel 64 with the inner cavity of the water spray cover 622, and the narrowest part of the end section is the atomizing port 65.

[0047] More specifically: the steam flow rate is 5-500 t / h, the temperature is 300-600℃, and the pressure is 1-10 MPa.

[0048] More specifically: droplet size ≤100μm, mixing section length ≤3D (D is pipe diameter).

[0049] More specifically: the desuperheating water nozzle is made of 316L stainless steel with a hardness of HRC55-60, a temperature resistance of 600℃, and an erosion resistance life of more than five years.

[0050] More specifically: During operation, superheated steam enters from the inlet pipe 1, passes through the connecting hole 23 and enters the outlet pipe 3. Desuperheating water enters from the desuperheating water pipe 7, passes through the desuperheating water hole 26 and enters the desuperheating water chamber 25. It is evenly distributed to each nozzle assembly 6. The desuperheating water is sprayed obliquely through the spray hole 625 to form a rotating jet. It gradually accelerates in the desuperheating water flow channel 64 and finally rotates out from the atomizing port 65 to form a droplet jet.

[0051] Auxiliary steam enters through auxiliary steam pipe 8, passes through auxiliary steam hole 28 into auxiliary steam chamber 27, and is ejected through the round hole on outlet orifice plate 9 and auxiliary steam flow channel 10. The accelerated steam flow further cuts the droplet jet, making the droplet size smaller and ensuring good atomization effect at low load.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, 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; as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way, and will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of this utility model.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vapor assisted atomized multi-burner attemperator characterized by, Includes inlet pipe (1), desuperheater middle section (2), outlet pipe (3), cover plate (4), nozzle orifice plate (5), nozzle assembly (6), desuperheating water connection pipe (7), auxiliary steam connection pipe (8), outlet orifice plate (9), and auxiliary steam flow channel (10). The middle section (2) of the desuperheater is a hollow cylinder. From the outside to the inside, it consists of the middle section outer perimeter (21), the orifice plate (22), and the nozzle chamber (24). The orifice plate (22) has several vertical connecting holes (23). The inlet pipe (1) is connected to the upper end of the middle section outer perimeter (21), and the outlet pipe (3) is connected to the lower end of the middle section outer perimeter (21). The nozzle chamber (24) has three stop structures from top to bottom. The cover plate (4) seals the upper stop structure, the middle stop structure is connected to the nozzle orifice plate (5), and the lower stop structure is connected to the outlet orifice plate (9). Several nozzle assemblies (6) are installed on the nozzle orifice plate (5) and the outlet orifice plate (9). An auxiliary steam flow channel (10) is formed between the outlet orifice plate (9) and the nozzle assembly (6). The cover plate (4) and the nozzle orifice plate (5) are connected to a desuperheating water chamber (25). A horizontal desuperheating water hole (26) is provided on one side of the desuperheating water chamber (25). The desuperheating water hole (26) is connected to the desuperheating water pipe (7). The nozzle orifice plate (5) and the outlet orifice plate (9) are connected to an auxiliary steam chamber (27). A horizontal auxiliary steam hole (28) is provided on one side of the auxiliary steam chamber (27), and the auxiliary steam hole (28) is connected to the auxiliary steam pipe (8).

2. The multi-nozzle desuperheater for steam-assisted atomization according to claim 1, characterized in that, The nozzle orifice plate (5) has several symmetrically arranged circular holes along the circumferential direction, and each circular hole is equipped with a nozzle assembly (6). The outlet orifice plate (9) has circular holes corresponding to the nozzle assembly (6), and each circular hole is coaxially fitted with the nozzle assembly (6).

3. The multi-nozzle desuperheater for steam-assisted atomization according to claim 1, characterized in that, The nozzle assembly (6) includes a short tube (61), a nozzle body (62), and a nozzle plug (63). The lower end of the short tube (61) is connected to the nozzle body (62), and the nozzle plug (63) is inside the nozzle body (62).

4. A steam-assisted atomizing multi-burner attemperator according to claim 3, wherein The upper part of the nozzle body (62) is a frustum-shaped water spray seat (621), and the lower end of the water spray seat (621) is an outwardly expanding water spray cover (622). The nozzle body (62) is evenly provided with several water spray holes (625) in the circumferential direction, and the outlet of the water spray hole (625) is in the inner cavity of the water spray cover (622).

5. A multi-nozzle desuperheater for steam-assisted atomization according to claim 4, characterized in that, The water spray holes (625) are in two sets and are arranged coaxially and inclined outwards.

6. A steam-assisted atomizing multi-burner attemperator according to claim 4, wherein The water spray base (621) has a central hole (623) and a threaded hole (624) at its axis. The nozzle plug (63) has a cylindrical section and a threaded section. The central hole (623) is fitted with the cylindrical section, and the threaded hole (624) is fitted with the threaded section.

7. A steam-assisted atomizing multi-burner attemperator according to claim 6, wherein The lower end of the threaded section of the nozzle plug (63) is a conical rotating body, which forms a gradually narrowing cooling water channel (64) with the inner cavity of the water spray cover (622), and the narrowest part of the end section is the atomizing port (65).

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