Desuperheater

Abstract

The utility model discloses a desuperheater, and belongs to the technical field of steam temperature control. The desuperheater comprises a desuperheating pipeline, a hot steam inlet, a desuperheating water inlet, a swirler and a proper-temperature steam outlet, the swirler is provided with a plurality of swirling vanes, the swirling vanes are arranged in the circumferential direction of the desuperheating pipeline by a circle, and the proper-temperature steam outlet is formed in the circumferential direction of the desuperheating pipeline. The radial outer ends of the rotational flow blades abut against the inner wall of the temperature reduction pipeline, and seen from the axial direction of the temperature reduction pipeline, the side edge of each rotational flow blade is completely located in front of or behind the blade face of the adjacent rotational flow blade. And the parallel projection of the swirler in the axial direction of the temperature reducing pipeline is fully distributed on the cross section of the temperature reducing pipeline. Through the arrangement, the desuperheater is beneficial to full mixing of superheated steam and desuperheating water, and the purposes of rapidly cooling and shortening the desuperheating distance are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam temperature control, and particularly relates to a desuperheater. Background Art

[0002] In real life, water steam with different parameters is used in many places. The generation of steam is basically through different types of boilers, and the terminal steam temperature generated by each type of boiler often cannot fully match the steam temperature required by users. Especially for current heat users who largely utilize the extraction steam of power plant steam turbines as the steam source, the required steam temperature is even more different from the extraction steam temperature of the power plant.

[0003] To meet the requirements of various users for steam temperature, usually, superheated steam with a higher temperature is used as the steam source and desuperheating is achieved by spraying water into the desuperheater. Since after the desuperheating water is sprayed into the steam, sufficient mixing is required to complete the desuperheating process, this process mainly depends on the size and distribution state of the water droplets atomized by the nozzle and the contact time and mixing degree between the desuperheating water and the steam. However, in reality, the mixing effect between the superheated steam and the desuperheating water is not very ideal, resulting in the superheated steam being supplied to users without sufficient desuperheating. Content of the Utility Model

[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a desuperheater which is conducive to the full mixing of superheated steam and desuperheating water, achieving the purpose of rapid cooling and shortening the desuperheating distance.

[0005] The desuperheater according to an embodiment of the utility model includes a desuperheating pipeline, a hot steam inlet, a desuperheating water inlet, a swirler and a suitable-temperature steam outlet. A cavity is formed in the desuperheating pipeline; the hot steam inlet is communicated with the cavity; the desuperheating water inlet is communicated with the cavity, and the desuperheating water enters the cavity from the desuperheating water inlet to mix with the hot steam to cool the hot steam; the swirler is provided with a plurality of swirl vanes, and the plurality of swirl vanes are arranged in a circle along the circumferential direction of the desuperheating pipeline. The radially outer end of the swirl vane abuts against the inner wall of the desuperheating pipeline, and when viewed from the axial direction of the desuperheating pipeline, the side of each swirl vane is completely located before or after the leaf surface of the adjacent swirl vane, so that the parallel projection of the swirler in the axial direction of the desuperheating pipeline covers the cross-section of the desuperheating pipeline; the suitable-temperature steam outlet is communicated with the cavity, and the hot steam inlet and the suitable-temperature steam outlet are respectively located on both sides of the swirler, so that after the hot steam enters the cavity from the hot steam inlet, it hits the leaf surface of the swirl vane, passes through between the leaf surfaces of two adjacent swirl vanes and then rotates and mixes, and then flows out from the suitable-temperature steam outlet.

[0006] According to the desuperheater of the embodiments of the present utility model, by such settings, at least the following beneficial effects can be achieved: After the hot steam enters the cavity inside the desuperheater pipeline from the hot steam inlet, it is mixed and cooled with the desuperheating water that enters the cavity from the desuperheating water inlet. And the hot steam will rotate after passing through the cyclone, which can be better mixed, achieving a good cooling effect and achieving the purpose of rapid cooling and shortening the desuperheating distance.

[0007] In some specific embodiments of the present utility model, an inlet pipe is further included. The inlet pipe extends into the cavity from the desuperheating water inlet, and the desuperheating water is sprayed out from the inlet pipe to be mixed with the hot steam.

[0008] In some specific embodiments of the present utility model, the outlet of the inlet pipe and the hot steam inlet are arranged oppositely, so that the hot steam and the desuperheating water are mixed in a counter-jet manner and then pass through the cyclone.

[0009] In some specific embodiments of the present utility model, an atomizing nozzle is further included. The atomizing nozzle is arranged inside the cavity and is communicated with the outlet of the inlet pipe, and the desuperheating water is sprayed out from the atomizing nozzle through the outlet of the inlet pipe.

[0010] In some specific embodiments of the present utility model, the atomizing nozzle is connected to the cyclone. The radial inner ends of the plurality of swirling vanes are connected to the outer side wall of the atomizing nozzle and are arranged in a circumferential direction around the atomizing nozzle for one week.

[0011] In some specific embodiments of the present utility model, the surface of the swirling vane is arranged at a certain angle with the cross-section of the atomizing nozzle.

[0012] In some specific embodiments of the present utility model, the hot steam inlet and the suitable-temperature steam outlet are respectively arranged oppositely at both ends of the desuperheating pipeline, and the atomizing nozzle is arranged oppositely towards the hot steam inlet.

[0013] In some specific embodiments of the present utility model, a plurality of cyclones are arranged along the axial direction of the desuperheating pipeline.

[0014] In some specific embodiments of the present utility model, the radial outer ends of the swirling vanes are fixedly connected to the inner wall of the desuperheating pipeline.

[0015] In some specific embodiments of the present utility model, the swirling vanes are made of heat-absorbing materials.

[0016] The additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0018] Figure 1 is a schematic diagram of the overall structure of a desuperheater according to an embodiment of the present utility model;

[0019] Figure 2 is a three-dimensional structure schematic diagram of a swirler according to an embodiment of the present utility model;

[0020] Figure 3 is a front view of a swirler according to an embodiment of the present utility model;

[0021] Figure 4 is a side view of a swirler according to an embodiment of the present utility model.

[0022] Reference numerals:

[0023] desuperheating pipeline 100, hot steam inlet 200, desuperheating water inlet 300, suitable temperature steam outlet 400, swirler 500, swirling vane 510, introducing pipe 600, atomizing nozzle 700. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0025] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or the sequence relationship of the indicated technical features.

[0027] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0028] Reference will be made below Figures 1 to 4 to describe the desuperheater according to an embodiment of the present utility model.

[0029] The desuperheater according to an embodiment of the present utility model includes a desuperheating pipeline 100, a hot steam inlet 200, a desuperheating water inlet 300, a swirler 500, and a suitable-temperature steam outlet 400. A cavity is formed in the desuperheating pipeline 100; the hot steam inlet 200 is communicated with the cavity; the desuperheating water inlet 300 is communicated with the cavity, and the desuperheating water enters the cavity from the desuperheating water inlet 300 and mixes with the hot steam to cool the hot steam; the swirler 500 is provided with a plurality of swirl vanes 510, and the plurality of swirl vanes 510 are arranged in a circumferential direction around the desuperheating pipeline 100 for one week. The radially outer end of the swirl vane 510 abuts against the inner wall of the desuperheating pipeline 100, and when viewed from the axial direction of the desuperheating pipeline 100, the side of each swirl vane 510 is completely located in front of or behind the leaf surface of the adjacent swirl vane 510, so that the parallel projection of the swirler 500 in the axial direction of the desuperheating pipeline 100 covers the cross-section of the desuperheating pipeline 100; the suitable-temperature steam outlet 400 is communicated with the cavity, and the hot steam inlet 200 and the suitable-temperature steam outlet 400 are respectively located on both sides of the swirler 500, so that after the hot steam enters the cavity from the hot steam inlet 200, it hits the leaf surface of the swirl vane 510, passes through between the leaf surfaces of two adjacent swirl vanes 510 and rotates and mixes, and then flows out from the suitable-temperature steam outlet 400.

[0030] For example Figures 1 to 4 As shown, the swirler 500 is arranged in the desuperheating pipeline 100, the radially outer end of the swirl vane 510 abuts against the inner wall of the desuperheating pipeline 100, and the side of each swirl vane 510 is completely located in front of or behind the adjacent swirl vane 510, so that the parallel projection of the swirler 500 in the axial direction of the desuperheating pipeline 100 covers the cross-section of the desuperheating pipeline 100, that is, the shape of the parallel projection of the swirler 500 in the axial direction of the desuperheating pipeline 100 is exactly the same as the shape of the cross-section of the desuperheating pipeline 100, so that the desuperheating pipeline 100 can be fully covered in the axial direction.

[0031] It should be noted that the desuperheating pipe 100 is preferably in a cylindrical shape. At this time, the radially outer ends of the swirl vanes 510 are arc-shaped and abut against the inner wall of the desuperheating pipe 100, so that the arc surface formed by the radially outer ends of all the swirl vanes 510 adapts to the desuperheating pipe 100, thereby enabling the desuperheating pipe 100 to be closed. However, the desuperheating pipe 100 can also be of other shapes, such as a cuboid, a cube, or a polygon, as long as the shape of the swirl vanes 510 is adjusted.

[0032] Through such a setting, after the hot steam enters the cavity from the hot steam inlet 200, when passing through the swirler 500, it must hit the surface of the swirl vanes 510 of the swirler 500, that is, impact on the surface of the swirl vanes 510, and then can pass through the gap between two adjacent swirl vanes 510, for example Figure 2 as shown. The swirl vanes 510 have a spacing in the axial direction. Figure 2 In the given embodiment, one side of the swirl vane 510 is located in front of the surface of the adjacent swirl vane 510, and the other side is located behind the surface of the other adjacent swirl vane 510. The overlapping setting enables the swirler 500 to cover the cross-section of the desuperheating pipe 100.

[0033] The desuperheater is also provided with a desuperheating water inlet 300, for example Figure 1 as shown. The desuperheating water enters the cavity from the desuperheating water inlet 300 and is mixed with the hot steam, and then the steam after cooling is discharged from the suitable temperature steam inlet. Among them, the desuperheating water inlet 300 can be either before the swirler 500, so that the hot steam and the desuperheating water are mixed and then pass through the swirler 500, or after the swirler 500, and are mixed and cooled with the hot steam after the hot steam rotates, and then discharged from the suitable temperature steam inlet.

[0034] It should be noted that because the swirl vanes 510 are arranged in an overlapping manner, when the hot steam hits the surface of the swirl vanes 510, it must turn around to flow out from between two adjacent swirl vanes 510. And the multiple swirl vanes 510 are arranged in a circumferential direction around one week, so that the directions of the hot steam coming out from the gaps between multiple adjacent swirl vanes 510 are all different, thereby enabling mixing to achieve sufficient mixing and cooling.

[0035] According to the desuperheater of the embodiment of the present invention, through such a setting, the hot steam can rotate after passing through the swirler 500, can be better mixed, achieve a good cooling effect, and achieve the purpose of rapid cooling and shortening the desuperheating distance.

[0036] In some specific embodiments of the present invention, an inlet pipe 600 is further included. The inlet pipe 600 extends from the desuperheating water inlet 300 into it, and the desuperheating water is sprayed out from the inlet pipe 600 to be mixed with the hot steam.

[0037] For example Figure 1 As shown, by providing the inlet pipe 600, the injection angle of the desuperheating water can be adjusted by adjusting the position of the outlet of the inlet pipe 600. When the outlet of the inlet pipe 600 is disposed opposite to the hot steam inlet 200, the hot steam can be in counter-flow mixing with the desuperheating water after entering the cavity from the hot steam inlet 200, and the mixing is more sufficient.

[0038] In some specific embodiments of the present invention, the outlet of the inlet pipe 600 and the hot steam inlet 200 are disposed opposite to each other, so that the hot steam and the desuperheating water are in counter-flow mixing and then pass through the cyclone 500.

[0039] For example Figure 1 As shown, the outlet of the inlet pipe 600 and the hot steam inlet 200 are disposed opposite to each other, so that the hot steam can be in counter-flow mixing with the desuperheating water after entering the cavity from the hot steam inlet 200, and the mixing is more sufficient.

[0040] Furthermore, the outlet of the inlet pipe 600 and the hot steam inlet 200 are located on the same side of the cyclone 500. The hot steam and the desuperheating water are in counter-flow mixing for sufficient mixing, and the temperature reduction effect is more obvious. The water particles of the desuperheating water and the primary steam form a counter-flow mixing for heat exchange. In this process, the water particles absorb the heat of the primary steam and evaporate into superheated steam. At the same time, the primary steam releases heat to the water particles and the temperature decreases. After mixing, both move towards the cyclone 500. If there are still small water particles that are not completely evaporated, since the density of the water particles is much greater than that of the steam, when the water particles reach the cyclone 500, the water particles will strike the swirl vanes 510 and splash, which is equivalent to secondary atomization, and mix into the steam to absorb heat and evaporate sufficiently. At the same time, when the desuperheated steam flows through the swirl vanes 510, it will rotate and enter the steam rotary mixing zone. The steam in the steam rotary mixing zone is mixed again sufficiently and then sent to the user from the suitable temperature steam outlet 400, so that the steam at the outlet of the desuperheater does not contain moisture and the temperature is uniform.

[0041] In some specific embodiments of the present invention, an atomizing nozzle 700 is further included. The atomizing nozzle 700 is disposed in the cavity and is connected to the outlet of the inlet pipe 600. The desuperheating water is ejected from the atomizing nozzle 700 through the outlet of the inlet pipe 600.

[0042] For example Figure 1 、 Figure 2 and Figure 3 As shown, the atomizing nozzle 700 is disposed in the cavity and is connected to the outlet of the inlet pipe 600. The desuperheating water enters the atomizing nozzle 700 from the outlet of the inlet pipe 600 and is atomized and ejected, which can reduce the water particles when the desuperheating water is ejected from the atomizing nozzle 700, is more conducive to the counter-flow of the hot steam and the water particles for heat exchange, and is more conducive to mixing and temperature reduction.

[0043] In some specific embodiments of the present utility model, the atomizing nozzle 700 is connected to the cyclone 500. The radially inner ends of the multiple swirling vanes 510 are connected to the outer sidewall of the atomizing nozzle 700 and are arranged circumferentially around the atomizing nozzle 700 for one week.

[0044] For example Figures 2 to 4 As shown, the atomizing nozzle 700 is connected to the cyclone 500. The radially inner ends of the multiple swirling vanes 510 are connected to the outer sidewall of the atomizing nozzle 700 and are arranged circumferentially around the atomizing nozzle 700 for one week. After the desuperheating water is atomized and ejected from the atomizing nozzle 700, it undergoes counter-jet heat exchange with the hot steam, and then hits the swirling vanes 510 to the right, causing the larger water particles to become smaller after hitting the swirling vanes 510 and being more fully mixed after flowing out of the cyclone 500, which is beneficial for temperature reduction.

[0045] Furthermore, the swirling vanes 510 are fixedly connected to the atomizing nozzle 700, and various connection methods such as welding, screw connection, or bolt connection can be adopted.

[0046] In some specific embodiments of the present utility model, the leaf surface of the swirling vanes 510 is arranged at a certain angle with the cross-section of the atomizing nozzle 700.

[0047] For example Figure 2 and Figure 3 As shown, the leaf surface of the swirling vanes 510 is arranged at a certain angle with the cross-section of the atomizing nozzle 700, making it easier for the hot steam to rotate when passing through the cyclone 500. The inclination angle of the swirling vanes 510 can be set as needed.

[0048] In some specific embodiments of the present utility model, the hot steam inlet 200 and the suitable-temperature steam outlet 400 are respectively arranged at both ends of the desuperheating pipeline 100 in a relative manner, and the atomizing nozzle 700 is arranged opposite to the hot steam inlet 200 and faces the hot steam inlet 200.

[0049] For example Figure 1 As shown, the hot steam inlet 200 and the suitable-temperature steam outlet 400 are respectively located at both ends of the desuperheating pipeline 100, and the atomizing nozzle 700 faces the hot steam inlet 200 and is arranged opposite to the hot steam inlet 200. By arranging the atomizing nozzle 700 opposite to the hot steam inlet 200, the hot steam and the atomized desuperheating water are counter-jet and mixed, resulting in a better mixing effect and more sufficient mixing.

[0050] In some specific embodiments of the present utility model, multiple cyclones 500 are arranged along the axial direction of the desuperheating pipeline 100.

[0051] For example Figure 1 As shown Figure 1In the illustrated embodiment, two cyclones 500 are provided. After the hot steam and the desuperheated water are mixed and then rotated through the cyclone 500, they can enter the next cyclone 500 and continue to rotate and mix, resulting in a better mixing effect and more obvious temperature reduction. The number of cyclones 500 provided can be set according to the temperature of the hot steam required and the temperature to be reduced.

[0052] In some specific embodiments of the present utility model, the radially outer end of the swirl vane 510 is fixedly connected to the inner wall of the desuperheating pipe 100.

[0053] The radially outer end of the swirl vane 510 being fixedly connected to the inner wall of the desuperheating pipe 100 can adopt various connection methods such as welding, screw connection, or bolt connection.

[0054] In some specific embodiments of the present utility model, the swirl vane 510 is made of a heat-absorbing material.

[0055] The swirl vane 510 being made of a heat-absorbing material can cause the temperature to be further reduced when the hot steam and the desuperheated water hit and impact the swirl vane 510. There are various heat-absorbing materials, and it can be made of materials such as rock wool board, foamed polyurethane, or glass wool, etc., further enhancing the temperature reduction effect of the desuperheater.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0057] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. A desuperheater, characterized in that: include: A temperature reduction pipeline (100), wherein a cavity is provided in the temperature reduction pipeline (100); A hot steam inlet (200), the hot steam inlet (200) being in communication with the cavity; A cooling water inlet (300), the cooling water inlet (300) being in communication with the cavity, and cooling water entering the cavity from the cooling water inlet (300) to mix with the hot steam to cool the hot steam; A swirler (500), wherein the swirler (500) is provided with a plurality of swirl blades (510), wherein the plurality of swirl blades (510) are arranged around the circumferential direction of the cooling pipe (100), wherein the radial outer ends of the swirl blades (510) abut against the inner wall of the cooling pipe (100), and when viewed in the axial direction of the cooling pipe (100), the side edges of each of the swirl blades (510) are completely located in front of or behind the blade surface of the adjacent swirl blade (510), so that the parallel projection of the swirler (500) in the axial direction of the cooling pipe (100) covers the entire cross section of the cooling pipe (100); The suitable temperature steam outlet (400) is connected to the cavity, and the hot steam inlet (200) and the suitable temperature steam outlet (400) are respectively located on both sides of the cyclone (500), so that after the hot steam enters the cavity from the hot steam inlet (200), it hits the blade surface of the swirl blade (510), passes between the blade surfaces of two adjacent swirl blades (510), rotates and mixes, and then flows out from the suitable temperature steam outlet (400).

2. The desuperheater according to claim 1, characterized in that: It also includes an introduction pipe (600), which extends from the cooling water inlet (300) into the cavity, and the cooling water is sprayed out from the introduction pipe (600) to mix with the hot steam.

3. The desuperheater according to claim 2, characterized in that: The outlet of the introduction pipe (600) and the hot steam inlet (200) are arranged opposite to each other, so that the hot steam and the cooling water are offset and mixed and then pass through the cyclone (500).

4. The desuperheater according to claim 2, characterized in that: It also includes an atomizing nozzle (700), which is arranged in the cavity and is connected to the outlet of the introduction pipe (600). The cooling water is sprayed out from the atomizing nozzle (700) through the outlet of the introduction pipe (600).

5. The desuperheater according to claim 4, characterized in that: The atomizing nozzle (700) is connected to the cyclone (500), and the radial inner ends of the plurality of swirl blades (510) are connected to the outer side wall of the atomizing nozzle (700) and are arranged circumferentially around the atomizing nozzle (700).

6. The desuperheater according to claim 5, characterized in that The blade surface of the swirl blade (510) is arranged at a certain angle to the cross section of the atomizing nozzle (700).

7. The desuperheater according to claim 4, characterized in that: The hot steam inlet (200) and the suitable temperature steam outlet (400) are respectively located at two ends of the temperature reduction pipe (100) and arranged opposite to each other, and the atomizing nozzle (700) is arranged towards the hot steam inlet (200) and opposite to the hot steam inlet (200).

8. The desuperheater according to claim 1, characterized in that: A plurality of cyclones (500) are arranged along the axial direction of the temperature reduction pipe (100).

9. The desuperheater according to claim 1, characterized in that: The radial outer end of the swirl blade (510) is fixedly connected to the inner wall of the temperature reduction pipe (100).

10. The desuperheater according to claim 1, characterized in that The swirl blades (510) are made of heat-absorbing material.

Images