Self-adjusting multi-nozzle steam attemperator

Abstract

The utility model provides a kind of self-regulating multi-nozzle steam desuperheater, belong to industrial steam process control equipment technical field. The purpose is to solve the problem of response delay and regulation rigidity caused by traditional single nozzle unadjustable. In the utility model, the bottom of cylinder is provided with round hole and is connected with cylinder flange, water spraying body and water spraying connector are placed in the inside of cylinder, the lower end of water spraying connector is connected with desuperheating water flange, desuperheating water flange is connected with the bottom of cylinder; the inner connecting sleeve inner wall is coaxially matched with the lower section of water spraying valve seat; the top of water spraying body is connected with the plug with through hole, spring and water spraying valve plug are equipped in the bottom of plug, water spraying valve plug is movably connected with water spraying valve seat; a plurality of rows of water spraying mounting holes are arranged on the side wall of water spraying body along the central axis, cyclone vane and nozzle are sequentially equipped in each water spraying mounting hole from inside to outside. The utility model effectively solves the problem of response delay and regulation rigidity caused by traditional single nozzle unadjustable, and realizes the rapid and accurate control of temperature.

Description

Technical Field

[0001] This utility model belongs to the technical field of industrial steam process control equipment, and in particular relates to a self-adjusting multi-nozzle steam desuperheater. Background Technology

[0002] In thermal power generation and industrial steam systems, desuperheaters are crucial devices for controlling steam temperature. Traditional desuperheaters primarily employ a non-adjustable single-nozzle design, which generally suffers from the following drawbacks: the single-nozzle structure exhibits significant response delays during sudden changes in steam flow, resulting in insufficient adjustment flexibility; uneven temperature field distribution can easily lead to thermal stress cracking in downstream pipelines, and can also cause excessive spraying of desuperheating water, resulting in steam quality loss and reduced energy efficiency.

[0003] In summary, there is an urgent need to design a self-adjusting multi-nozzle steam desuperheater to solve the problems of response delay and rigid adjustment caused by the non-adjustable traditional single nozzle, and to achieve rapid and accurate temperature control. Utility Model Content

[0004] A brief overview of the present invention is given below to provide a basic understanding of certain aspects thereof. It should be understood that this overview is not an exhaustive summary of the present invention. It is not intended to identify key or essential parts of the present invention, nor is it intended to limit the scope of the present invention. Its purpose is merely to present certain concepts in a simplified form as a prelude to the more detailed description that follows.

[0005] In view of this, in order to solve the problems of response delay and rigid adjustment caused by the non-adjustable traditional single nozzle, this utility model provides a self-adjusting multi-nozzle steam desuperheater.

[0006] Solution: A self-adjusting multi-nozzle steam desuperheater, comprising a cylinder, a water spray body, a swirl vane, a nozzle, a plug, a spring, a valve plug sealing ring, a water spray valve plug, a water spray valve seat, a valve seat sealing ring, a water spray pipe, a cylinder flange, and a desuperheating water flange;

[0007] The bottom of the cylinder has a round hole for connection with the cylinder flange. The water spray body and the water spray pipe are coaxially connected from top to bottom and placed inside the cylinder. The water spray body is perpendicular to the axis of the cylinder. The lower end of the water spray pipe passes through the round hole and is connected to the desuperheating water flange. The desuperheating water flange is connected to the bottom of the cylinder through the cylinder flange.

[0008] The top of the water spray pipe is provided with an inner connecting sleeve, and the inner wall of the inner connecting sleeve is coaxially fitted with the lower section of the water spray valve seat.

[0009] The top of the water spray body is threadedly connected to a plug with a through hole. The bottom of the plug is sequentially fitted with a pre-compressed spring and a water spray valve plug. The water spray valve plug is movably connected to the water spray valve seat.

[0010] The side wall of the water spray body is provided with multiple rows of water spray installation holes along the central axis. Each row has 2 to 3 water spray installation holes arranged in a circumferential direction. Each water spray installation hole is equipped with a swirl vane and a nozzle from the inside to the outside.

[0011] Furthermore, the upper section of the water spray valve plug is cylindrical and coaxially fitted with the inner wall of the water spray body, while the lower section has a valve plug sealing surface that is conical and fits with the water spray valve seat. Three valve plug annular grooves are opened on the outer wall of the water spray valve plug, and valve plug sealing rings are installed in the grooves.

[0012] Furthermore, the top of the water spray valve seat is an annular boss, the lower section is a straight pipe section, and the middle section has an annular groove for the valve seat; the outer wall of the boss of the water spray valve seat is provided with a 60° valve seat chamfer, which is coaxially engaged with the conical pressure sleeve of the water spray body, the inner wall of the boss is a conical valve seat sealing surface, which is engaged with the valve plug sealing surface of the water spray valve plug to form a valve port, and a valve seat sealing ring is installed in the annular groove of the valve seat.

[0013] Furthermore, the water spray mounting hole is stepped.

[0014] Furthermore, the desuperheating water flange includes an upper desuperheating water flange and a lower desuperheating water flange. The upper desuperheating water flange is connected to the cylinder flange, and the lower desuperheating water flange is connected to the desuperheating water pipeline. The desuperheating water flange contains two reducing pipes, namely a large reducing pipe and a small reducing pipe. The large reducing pipe is connected to the desuperheating water pipeline, and the small reducing pipe is connected to the water spray pipe.

[0015] The present invention has the following advantages over the prior art:

[0016] 1. This utility model automatically adjusts the number of swirling nozzles deployed according to the desuperheating water pressure, and can quickly adapt to changes in working conditions such as sudden changes in steam flow without the need for an additional drive mechanism. It completely solves the problems of response delay and rigid adjustment caused by the non-adjustable traditional single nozzle, and achieves rapid and accurate temperature control.

[0017] 2. The present invention adopts a multi-nozzle design to make the distribution of desuperheating water droplets more uniform on the steam heat exchange cross section, which greatly enhances the mixing and heat exchange effect of desuperheating water and high-temperature steam. It not only improves the desuperheating rate, but also effectively improves the problem of uneven temperature field caused by traditional single nozzle, and reduces the risk of thermal stress cracking of downstream pipelines due to temperature difference.

[0018] 3. Because of its rapid adjustment response and uniform droplet mixing, this utility model eliminates the need for "excessive spraying of desuperheating water" to avoid local overheating, thereby reducing the problem of excessive steam humidity at the source, ensuring steam quality, and improving the overall system energy efficiency. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of a self-adjusting multi-nozzle steam desuperheater.

[0021] Figure 2 This is a schematic diagram of the water jet structure;

[0022] Figure 3 for Figure 2 Sectional view of AA;

[0023] Figure 4 This is a schematic diagram of the structure of the water spray valve plug;

[0024] Figure 5 This is a schematic diagram of the water spray valve seat.

[0025] Figure 6 This is a schematic diagram of the water spray pipe structure;

[0026] Figure 7 This is a schematic diagram of the structure of a desuperheating water flange.

[0027] In the diagram: 1-Cylinder, 2-Water spray body, 3-Swirl vane, 4-Nozzle, 5-Plug, 6-Spring, 7-Valve plug sealing ring, 8-Water spray valve plug, 9-Water spray valve seat, 10-Valve seat sealing ring, 11-Water spray pipe connection, 12-Cylinder flange, 13-Desuperheating water flange, 21-Nozzle mounting hole, 22-Conical pressure sleeve, 23-Outer connecting sleeve, 81-Valve plug annular groove, 82-Valve plug sealing surface, 91-Valve seat annular groove, 92-Valve seat chamfer, 93-Valve seat sealing surface, 111-Inner connecting sleeve, 131-Desuperheating water upper flange, 132-Desuperheating water lower flange, 133-Large diameter reducer, 134-Small diameter reducer. Detailed Implementation

[0028] To make the technical solutions and advantages of the embodiments of this utility model clearer, the exemplary embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0029] Examples, References Figure 1-7This embodiment describes a self-adjusting multi-nozzle steam desuperheater, comprising a cylinder 1, a water spray body 2, a swirl vane 3, a nozzle 4, a plug 5, a spring 6, a valve plug sealing ring 7, a water spray valve plug 8, a water spray valve seat 9, a valve seat sealing ring 10, a water spray pipe 11, a cylinder flange 12, and a desuperheating water flange 13.

[0030] The bottom of the cylinder 1 has a round hole that connects to the cylinder flange 12. The water spray body 2 and the water spray pipe 11 are coaxially connected from top to bottom and placed inside the cylinder 1. The water spray body 2 is perpendicular to the axis of the cylinder 1. The lower end of the water spray pipe 11 passes through the round hole and connects to the desuperheating water flange 13. The desuperheating water flange 13 is connected to the bottom of the cylinder 1 through the cylinder flange 12.

[0031] The top of the water spray pipe 11 is provided with an inner connecting sleeve 111, and the inner wall of the inner connecting sleeve 111 is coaxially engaged with the lower section of the water spray valve seat 9.

[0032] The top of the water spray body 2 is threadedly connected to the plug 5 with a through hole. The bottom of the plug 5 is sequentially equipped with a pre-compressed spring 6 and a water spray valve plug 8. The water spray valve plug 8 is movably connected to the water spray valve seat 9.

[0033] The side wall of the water spray body 2 is provided with multiple rows of water spray mounting holes 21 along the central axis. Each row has 2 to 3 water spray mounting holes 21 arranged in a circumferential direction. Each water spray mounting hole 21 is equipped with a swirl vane 3 and a nozzle 4 from the inside to the outside.

[0034] Furthermore, the upper section of the water spray valve plug 8 is cylindrical and coaxially engages with the inner wall of the water spray body 2, while the lower section has a valve plug sealing surface 82 that is conical and engages with the water spray valve seat 9. Three valve plug annular grooves 81 are opened on the outer wall of the water spray valve plug 8, and valve plug sealing rings 7 are installed in the grooves.

[0035] Furthermore, the top of the water spray valve seat 9 is an annular boss, the lower section is a straight pipe section, and the middle section has a valve seat annular groove 91; the outer wall of the boss of the water spray valve seat 9 is provided with a 60° valve seat chamfer 92, which is coaxially engaged with the conical pressure sleeve 22 of the water spray body 2, and the inner wall of the boss is a conical valve seat sealing surface 93, which is engaged with the valve plug sealing surface 82 of the water spray valve plug 8 to form a valve port, and a valve seat sealing ring 10 is installed in the valve seat annular groove 91.

[0036] Furthermore, the water spray mounting hole 21 is stepped.

[0037] Furthermore, the desuperheating water flange 13 includes a desuperheating water upper flange 131 and a desuperheating water lower flange 132. The desuperheating water upper flange 131 is connected to the cylinder flange 12, and the desuperheating water lower flange 132 is connected to the desuperheating water pipeline. The desuperheating water flange 13 contains two reducing pipes, namely a large reducing pipe 133 and a small reducing pipe 134. The large reducing pipe 133 is connected to the desuperheating water pipeline, and the small reducing pipe 134 is connected to the water spray pipe 11.

[0038] The working principle of this utility model is as follows:

[0039] During operation, desuperheating water enters the spray body 2 through the desuperheating water flange 13 and the spray pipe 11. Under the pressure of the desuperheating water, the spray valve plug 8 is pushed upward, opening the valve port and allowing the desuperheating water to flow into the inner cavity of the spray body 2. It is then sprayed out through the swirl vane 3 and nozzle 4, atomizing into fine water droplets. After absorbing heat from the steam, the droplets vaporize, thus lowering the steam temperature. During this process, as the desuperheating water pressure increases, the upward thrust on the valve plug sealing surface 82 gradually increases, overcoming the thrust of the spring 6. This causes the spray valve plug 8 to gradually rise, increasing the number of nozzles 4 through which the desuperheating water passes and gradually increasing the desuperheating water flow rate. This achieves automatic and flexible adjustment of the desuperheating water flow rate according to changes in the desuperheating water pressure.

[0040] After the work is completed, under the thrust of the pre-compressed spring 6, the sealing surface between the water spray valve plug 8 and the water spray valve seat 9 is pressed tight, and the passage of the desuperheating water is closed.

[0041] This invention automatically adjusts the number of swirling nozzles deployed according to the desuperheating water pressure, enabling rapid adaptation to changes in operating conditions such as sudden changes in steam flow without the need for an additional drive mechanism. This completely solves the problems of response delay and rigid adjustment caused by the non-adjustable nature of traditional single nozzles, achieving rapid and precise temperature control. At the same time, the multi-nozzle design makes the distribution of desuperheating water droplets more uniform across the steam heat exchange cross section, significantly enhancing the mixing and heat exchange effect between desuperheating water and high-temperature steam. This not only improves the desuperheating rate but also effectively improves the problem of uneven temperature field caused by traditional single nozzles, reducing the risk of thermal stress cracking in downstream pipelines due to temperature differences.

[0042] Because of its rapid adjustment response and uniform droplet mixing, this invention eliminates the need for excessive spraying of cooling water to avoid local overheating, thereby reducing the problem of excessive steam humidity at its source, ensuring steam quality, and improving the overall system's energy efficiency.

[0043] Although the present invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the present invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and edibility purposes, and not for interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of the invention, the disclosure made is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

Claims

1. A self-adjusting multi-nozzle steam desuperheater, characterized in that, Includes cylinder (1), water spray body (2), swirl vane (3), nozzle (4), plug (5), spring (6), valve plug sealing ring (7), water spray valve plug (8), water spray valve seat (9), valve seat sealing ring (10), water spray pipe (11), cylinder flange (12), desuperheating water flange (13), bolt (14) and nut (15); The bottom of the cylinder (1) has a round hole that is connected to the cylinder flange (12). The water spray body (2) and the water spray pipe (11) are coaxially connected from top to bottom and placed inside the cylinder (1). The water spray body (2) is perpendicular to the axis of the cylinder (1). The lower end of the water spray pipe (11) passes through the round hole and is connected to the desuperheating water flange (13). The desuperheating water flange (13) is connected to the bottom of the cylinder (1) through the cylinder flange (12). The top of the water spray pipe (11) is provided with an inner connecting sleeve (111), and the inner wall of the inner connecting sleeve (111) is coaxially engaged with the lower section of the water spray valve seat (9). The top of the water spray body (2) is threadedly connected to the plug (5) with a through hole. The bottom of the plug (5) is sequentially equipped with a pre-compressed spring (6) and a water spray valve plug (8). The water spray valve plug (8) is movably connected to the water spray valve seat (9). The water spray body (2) has multiple rows of water spray mounting holes (21) along the central axis on its side wall. Each row has 2 to 3 water spray mounting holes (21) arranged in a circumferential direction. Each water spray mounting hole (21) is equipped with a swirl vane (3) and a nozzle (4) from the inside to the outside.

2. The self-adjusting multi-nozzle steam desuperheater according to claim 1, characterized in that, The upper section of the water spray valve plug (8) is cylindrical and coaxially fitted with the inner wall of the water spray body (2). The lower section has a valve plug sealing surface (82) that is conical and fits with the water spray valve seat (9). Three valve plug annular grooves (81) are opened on the outer wall of the water spray valve plug (8), and valve plug sealing rings (7) are installed in the grooves.

3. The self-adjusting multi-nozzle steam desuperheater according to claim 2, characterized in that, The top of the water spray valve seat (9) is an annular boss, the lower section is a straight pipe section, and the middle section has a valve seat annular groove (91); the outer wall of the boss of the water spray valve seat (9) is provided with a 60° valve seat chamfer (92), which is coaxially engaged with the conical pressure sleeve (22) of the water spray body (2), and the inner wall of the boss is a conical valve seat sealing surface (93), which is engaged with the valve plug sealing surface (82) of the water spray valve plug (8) to form a valve port, and a valve seat sealing ring (10) is installed in the valve seat annular groove (91).

4. The self-adjusting multi-nozzle steam desuperheater according to claim 1, characterized in that, The water spray mounting hole (21) is stepped.

5. The self-adjusting multi-nozzle steam desuperheater according to claim 1, characterized in that, The desuperheating water flange (13) includes a desuperheating water upper flange (131) and a desuperheating water lower flange (132). The desuperheating water upper flange (131) is connected to the cylinder flange (12), and the desuperheating water lower flange (132) is connected to the desuperheating water pipeline. The desuperheating water flange (13) contains two reducing pipes, namely a large reducing pipe (133) and a small reducing pipe (134). The large reducing pipe (133) is connected to the desuperheating water pipeline, and the small reducing pipe (134) is connected to the spray water pipe (11).

Images