A jet condenser nozzle

Abstract

This invention discloses a jet-type condenser nozzle, comprising a base plate, two water film plates, and two nozzles. The base plate has two mounting holes adapted to the outer diameter of the nozzles. The two water film plates are spaced apart and vertically disposed on the bottom surface of the base plate. The inlet ends of the two nozzles are respectively fixedly installed in the two mounting holes. The outlet ends of the two nozzles extend through the mounting holes to the space between the two water film plates and are symmetrically arranged, with the outlet ends of the two nozzles facing the two water film plates respectively. Each nozzle includes an inlet section, a converging section, a transition section, and an outlet section connected in sequence. The inlet section is fixedly installed in the mounting hole, and the outlet of the outlet section faces the corresponding water film plate. This jet-type condenser nozzle produces a large and thin water film with a complete structure, preventing water jet leakage at the tail end. It allows for good contact and condensation of the steam, and prevents the condensate from becoming overcooled at the outlet, effectively solving problems such as high heat consumption and high operating costs of the unit.

Description

Technical Field

[0001] This invention relates to the field of condenser technology, and more specifically to a jet-type condenser nozzle. Background Technology

[0002] A jet condenser is a type of mixed condenser used to condense steam discharged from the low-pressure cylinder of a steam turbine into water and to establish and maintain a vacuum at the turbine's exhaust port. Specifically, the process involves spraying cooling water through nozzles to form a water film, allowing direct heat exchange between the steam discharged from the turbine's low-pressure cylinder and the water film. The steam condenses into water after cooling, while the cooling water is heated to its saturation temperature after heat exchange. The key to the jet condenser's ability to condense steam into water lies in the water film. If the water film is perfectly and stably formed, the steam discharged from the turbine's low-pressure cylinder can achieve effective and good heat exchange with the water film. If the water film is not perfectly and stably formed, the steam discharged from the turbine's low-pressure cylinder cannot achieve effective and good heat exchange, and the cooling water sprayed by the jet condenser cannot be fully heated to its saturation temperature. This results in the condensate in the jet condenser being overcooled, increasing the heat consumption of the turbine unit and its operating costs.

[0003] The effectiveness of the water film produced by a jet condenser hinges on the nozzles. Typically, a water film can be formed within a nozzle head range of 0.6–2.0 m of water column. However, under winter operating conditions, the cooling water volume of the jet condenser is only about 60% of its design capacity. Due to insufficient cooling water pressure, the pressure difference of the sprayed water is less than 0.5 m, resulting in a very thick and small water film. If the upper water film is too thick, the cooling water cannot be heated to saturation temperature, causing the condensate to become too cold. If the upper water film is too small, a downward-flowing water column will form at the tail end of the film, which will disrupt the lower water films. Consequently, the jet condenser cannot produce a perfect and stable water film, further leading to excessive cooling of the condensate within the jet condenser. This results in high heat consumption and high operating costs for the turbine unit. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a jet-type condenser nozzle, which solves the problem that the water film sprayed from existing nozzles is very thick and small when the water pressure is low, and cannot be heated to the saturation temperature.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A jet condenser nozzle, comprising:

[0007] A substrate having two mounting holes;

[0008] Two water film plates are arranged at intervals and vertically on the bottom surface of the substrate. Multiple channels are opened on the two sides of the two water film plates that are close to each other. The multiple channels on the same water film plate are arranged in a ring array, and the bottom of the multiple channels can penetrate to the bottom and the outer side of the corresponding water film plate.

[0009] The nozzle has two nozzles, with their inlet ends fixedly mounted in two mounting holes on a base plate. The outlet ends of the two nozzles extend through the mounting holes to the space between two water film plates and are symmetrically arranged, with the outlet ends facing the two water film plates respectively. Each nozzle includes a sequentially connected inlet section and a tapering section. The inlet section is fixedly mounted in the mounting hole, and the tapering section is used to increase the liquid kinetic energy.

[0010] A fixing plate is fixedly mounted on the top surface of the substrate and is used to fix the nozzle.

[0011] The water film ejected from the nozzles of the aforementioned jet condenser has a large area and a thin thickness, with a complete water film structure. There is no downward water column at the tail end, which allows for good contact and condensation with the steam. Moreover, the condensate is not overcooled at the outlet, effectively solving the problems of high heat consumption and high operating costs of the unit.

[0012] Furthermore, the nozzle also includes a transition section and an outlet section, wherein the inlet section, the converging section, the transition section and the outlet section are connected in sequence, and the outlet of the outlet section faces the corresponding water film plate.

[0013] Furthermore, the inlet section is a DN15 nozzle, and the inlet section is a hollow cylindrical shape, with the inlet section and the substrate arranged at an angle.

[0014] Furthermore, the tapering section is a hollow frustum shape, with the large end of the tapering section connected to the inlet section and the small end of the tapering section connected to the transition section.

[0015] Furthermore, the transition section is a DN10 round pipe.

[0016] Furthermore, the shape of the outlet section from inlet to outlet is a gradually expanding hollow horn, and it is smoothly connected to the transition section through a grid surface.

[0017] Furthermore, slots are provided on both sides of the bottom surface of the substrate, and the tops of the two water film plates are respectively inserted into the two slots for snap-fit ​​connection.

[0018] Furthermore, both water film plates are trapezoidal in shape.

[0019] The beneficial effects of this invention are: the water film sprayed from the nozzle of this jet condenser has a large area and thin thickness, and the water film structure is complete. There will be no water column leakage at the tail end, which can make good contact with the steam and condense it. Moreover, the condensate will not be too cold at the outlet, which effectively solves the problems of high heat consumption and high operating cost of the unit. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0021] Figure 1 This is the front view of the present invention;

[0022] Figure 2 This is a bottom view of the present invention;

[0023] Figure 3 This is a schematic diagram of the nozzle structure;

[0024] Figure 4 This is a side view of the nozzle;

[0025] Figure 5 This is a schematic diagram of the water film plate structure;

[0026] Figure label:

[0027] 10-Baseboard, 11-Mounting hole, 20-Water film plate, 21-Channel, 30-Nose, 31-Inlet section, 32-Converging section, 33-Transition section, 34-Outlet section, 40-Fixing plate. Detailed Implementation

[0028] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0029] In the description of this invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the indicated position or element must have a specific orientation, or be constructed and operated in a specific way. Therefore, they should not be construed as limitations on this invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] Please see Figures 1 to 2 This invention provides a jet-type condenser nozzle, comprising a base plate 10, water film plates 20, and nozzles 30. The base plate 10 has two mounting holes 11 adapted to the outer diameter of the nozzles 30. Two water film plates 20 are spaced apart and vertically arranged on the bottom surface of the base plate 10. Two nozzles 30 have their inlet ends fixedly mounted in the two mounting holes 11 on the base plate 10 and welded in place. The outlet ends of the two nozzles 30 extend through the mounting holes 11 to the space between the two water film plates 20 and are symmetrically arranged, with the outlet ends of the two nozzles 30 facing the two water film plates 20 respectively. The two water film plates 20 are spaced apart and vertically arranged on both sides of the mounting holes 11 on the base plate 10. A fixing plate 40 is mounted on the base plate 10 to fix the nozzles 30, enhancing the stability of the nozzle fixation.

[0032] Please refer to the following: Figures 3 to 4 The nozzle 30 includes an inlet section 31, a tapering section 32, a transition section 33 and an outlet section 34 connected in sequence. The inlet section 31 is fixedly installed in the mounting hole 11, and the outlet of the outlet section 34 faces the corresponding water film plate 20. The inner wall of each nozzle 30 is smooth, which reduces the resistance when the cooling water flows in the nozzle 30.

[0033] Specifically, the inlet section 31 is a DN15 nozzle 30, and is a hollow cylindrical shape for the entry of cooling water. The length of the inlet section 31 is 18.9 mm, and the angle between the inlet section 31 and the base plate 10 is 110°. The tapering section 32 is a hollow frustum shape used to increase the kinetic energy of the liquid. The large end of the tapering section 32 is connected to the inlet section 31, and the small end of the tapering section 32 is connected to the transition section 33. The length of the tapering section 32 is 10 mm, and the angle between the tapering section 32 and the centerline of the pipe is 15°. The transition section 33... The pipe is a DN10 round pipe, and the length of the transition section 33 is 10mm. The shape of the outlet section 34 from the inlet to the outlet is a gradually expanding hollow horn mouth, and it is smoothly connected to the transition section 33 through a grid surface. The outlet shape of the outlet section 34 is elliptical. The extension direction of the major axis of the outlet section 34 is parallel to the extension direction of the width of the water film plate, so that the water curtain sprayed from the outlet of the outlet section 34 is fan-shaped and sprayed onto the water film plate 20 with a larger area. The major and minor radii of the outlet of the outlet section 34 are 7mm and 1mm, respectively.

[0034] When the cooling water enters through the inlet of the inlet section 31 and flows into the converging section 32, the pressure on the cooling water increases due to the gradual reduction in the cross-section of the converging section 32. Consequently, the impact force of the cooling water in the converging section 32 gradually increases. The transition section 33 serves as a buffer to prevent excessive pressure changes in the water flow, which could lead to backflow. When the cooling water flows into the outlet section 34, the elliptical shape of the outlet section 34 results in a wider outlet angle and a thinner thickness. This causes the cooling water to be sprayed out of the outlet section 34 in a fan shape, increasing the spray area. Finally, the cooling water is sprayed onto the water film plate 20 with a larger area, resulting in a larger and thinner water film.

[0035] In this embodiment, slots are provided on both sides of the bottom surface of the substrate 10, and the tops of the two water film plates 20 are respectively inserted into the two slots for snap-fit ​​connection. Figure 5 As shown in this embodiment, multiple channels 21 are provided on both sides of the two water film plates 20 that are close to each other. The multiple channels 21 on the same water film plate 20 are arranged in a ring array, and the bottom of the multiple channels 21 can penetrate to the bottom and outer sides of the corresponding water film plate 20, so that the tops of the multiple channels 21 are gathered together, while the bottoms of the multiple channels 21 are fan-shaped and dispersed. When the nozzle 30 sprays cooling water onto the water film plate 20, some of the cooling water enters the channel 21, and then flows along the channel 21, guiding the flow direction of the cooling water. Finally, it is sprayed from inside the channel 21 to the outside of the water film plate 20. The ring array of multiple channels 21 allows the cooling water to diffuse and spray out, expanding the liquid film area, thereby expanding the formed water film area.

[0036] Preferably, both water film plates 20 are trapezoidal in shape. The trapezoidal shape allows the cooling water to spray out from between the two water film plates 20, forming a larger and thinner fan-shaped water film.

[0037] The beneficial effects of this invention are: the water film sprayed from the nozzle of this jet condenser has a large area and thin thickness, and the water film structure is complete. There will be no water column leakage at the tail end, which can make good contact with the steam and condense it. Moreover, the condensate will not be too cold at the outlet, which effectively solves the problems of high heat consumption and high operating cost of the unit.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention 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 the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. An injection condenser nozzle characterized by, The utility model relates to a water film device, including: a substrate provided with two mounting holes; two water film plates, which are spaced apart and vertically arranged on the bottom surface of the substrate, each of the two water film plates is provided with a plurality of grooves on the two sides close to each other, the grooves on the same water film plate are arranged in a ring array, and the bottoms of the grooves can penetrate to the bottom of the corresponding water film plate and the outside of the two side edges; two spray pipes, the water inlet ends of the two spray pipes are respectively fixedly assembled in the two mounting holes on the substrate, the water outlet ends of the two spray pipes extend through the mounting holes to between the two water film plates and are symmetrically arranged, and the water outlet ends of the two spray pipes respectively face the two water film plates; the spray pipe comprises an inlet section and a tapered section connected in sequence, the inlet section is fixedly assembled in the mounting hole, and the tapered section is used for increasing the kinetic energy of liquid; and a fixing plate fixedly arranged on the top surface of the substrate for fixing the spray pipe. The spray pipe further comprises a transition section and an outlet section, the inlet section, the tapered section, the transition section and the outlet section are connected in sequence, and the outlet of the outlet section faces the corresponding water film plate.

2. A spray condenser nozzle according to claim 1, wherein: The inlet section is a DN15 spray pipe, and the inlet section is a hollow cylindrical body, the inlet section and the substrate are arranged at an angle.

3. A spray condenser nozzle as defined in claim 1 wherein: The tapered section is a hollow circular truncated cone, the large end of the tapered section is connected with the inlet section, and the small end of the tapered section is connected with the transition section.

4. A spray condenser nozzle as defined in claim 1 wherein: The transition section is a DN10 circular pipe.

5. A spray condenser nozzle as defined in claim 1 wherein: The shape of the inlet to the outlet of the outlet section is a gradually expanding hollow horn, and the transition section is smoothly connected with the outlet section through a grid surface.

6. A spray condenser nozzle as defined in claim 1 wherein: The bottom surface of the substrate is provided with a clamping groove on each side, and the top of each of the two water film plates is respectively embedded in the two clamping grooves for clamping connection.

7. A spray condenser nozzle as defined in claim 1 wherein: The shape of each of the two water film plates is a trapezoid.

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