CN215523255U - Desuperheater - Google Patents

Abstract

The utility model provides a desuperheater, includes hybrid piping and nozzle assembly, nozzle assembly sets up at least one along the hybrid piping annular, hybrid piping includes reducing pipe and venturi, venturi sets up inside the reducing pipe, nozzle assembly includes nozzle body, nozzle core, elastic component and block, the nozzle core slides and wears to establish at the nozzle originally internally, the block lid is established at the entrance point of nozzle body, the elastic component cover is established on the nozzle core, and control nozzle core elastic sliding realizes the regulation of desuperheating water flow. The utility model adopts the design of the Venturi tube, improves the flow velocity of the desuperheating water in the mixing pipeline, realizes the rapid breaking and evaporation of the desuperheating water droplets and improves the desuperheating efficiency of the desuperheater; simultaneously through the setting of two sets of nozzles for a plurality of nozzles separately set up, reduce hybrid piping's stress, prolong desuperheater's life.

Description

Desuperheater

Technical Field

The utility model relates to the technical field of desuperheaters, in particular to a desuperheater.

Background

The desuperheater is used for controlling and maintaining the temperature of the secondary steam to be a set value; the temperature-reducing water sprayed from the nozzle absorbs the heat of the superheated steam and then turns into steam, so that the temperature of the primary steam is reduced to the required temperature of the secondary steam; when a plurality of users actually use the steam turbine, the flow and temperature change range of primary steam is large, the flow of some working conditions can be controlled from 10-110%, and the requirements can be met only by a large-adjustable-ratio desuperheater.

Problems with existing desuperheaters include: (1) the desuperheater adopting flute-shaped nozzles or other nozzles with fixed cross sections has the adjustable ratio of 5: 1-10: 1, the working condition occasion of 10-110% of steam flow cannot be met; (2) the adjustable ratio of the variable-section nozzle with the non-adjustable spring set pressure is 25: 1-30: 1, it can not meet the working condition of 10% -110% steam flow.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a large-adjustable-ratio desuperheater, wherein a nozzle can obtain a pressure ratio of 100: 1, the adjustable ratio can completely meet the adjustment requirement of 10-110% of the primary steam flow; through the steam velocity of flow that improves in the hybrid piping, the desuperheating water droplet can break fast and evaporate in venturi, and the corruption and the erodeing of the pipeline of desuperheating water droplet that have significantly reduced prolong the life of desuperheater and pipeline, have improved the security of desuperheater and pipeline operation.

The technical purpose of the utility model is realized by the following technical scheme:

the utility model provides a desuperheater, includes hybrid piping and nozzle assembly, nozzle assembly sets up at least one along the hybrid piping annular, hybrid piping includes reducing pipe and venturi, venturi sets up inside the reducing pipe, nozzle assembly includes nozzle body, nozzle core, elastic component and block, the nozzle core slides and wears to establish at the nozzle originally internally, the block lid is established at the entrance point of nozzle body, the elastic component cover is established on the nozzle core, and control nozzle core elastic sliding realizes the regulation of desuperheating water flow.

Further, the elastic force of the elastic member in different nozzle assemblies is different.

Further, the nozzle assemblies are arranged on the pipe body of the mixing pipeline in two groups and are arranged along the periphery of the mixing pipeline in a staggered mode.

Further, nozzle body externally mounted nozzle seat, nozzle seat externally mounted has the nozzle valve body, the nozzle valve body keep away from the one end of nozzle body and install the nozzle valve gap.

Further, the nozzle valve cover is detachably connected with the nozzle body.

Furthermore, the nozzle seat is connected with a desuperheating water pipeline, the desuperheating water pipeline comprises a three-way joint, an annular pipe and a water distribution pipe, one end of the three-way joint is connected with an external water supply system, the other two ends of the three-way joint are respectively communicated with the two ends of the annular pipe, the periphery of the annular pipe is communicated with at least one water distribution pipe, and an outlet of the water distribution pipe is communicated with the nozzle seat.

Furthermore, the lengths of the water distribution pipes are different, and the water distribution pipes are respectively used for supplying water to the nozzle assemblies.

In conclusion, the utility model has the following beneficial effects:

1. the traditional process pipeline has large diameter and low flow velocity, and in order to meet the regulation requirement of large regulation ratio, the flow velocity of fluid in the desuperheater is greatly improved according to the reducing design of the pipeline of the desuperheater, so that water drops of desuperheater can be quickly broken and evaporated; meanwhile, the temperature reduction pipeline is arranged according to the venturi tube principle, so that the temperature reduction water sprayed by the nozzle does not directly scour the inner wall of the temperature reducer, and flows along the pipeline direction after changing the direction through the venturi tube, and further the flow velocity of the fluid in the temperature reducer is improved;

2. set up the elastic component in the nozzle, the setting of elastic component through different pressure, can realize the regulation of the flow of the desuperheating water of nozzle injection, when required desuperheating is adjusted lessly, the staff adjusts the water supply capacity, adopt the desuperheating water injection desuperheating of less flow, at this moment, the less nozzle of elastic component pressure sprays work, when all needing to increase the injection flow, this moment, the big nozzle of elastic component pressure begins to work, when the maximum flow, all nozzles work together, through the setting of elastic component, make the adjustable ratio of nozzle reach 100: 1, the adjustment requirement of large adjustable ratio of the temperature-reducing water is met;

3. because the amount of the desuperheating water is large, the nozzles are arranged into two groups, so that the phenomenon that water drops of the desuperheating water are not easy to break due to the fact that the desuperheating water is concentrated at one position is avoided; meanwhile, the problems of insufficient strength and large stress deformation of the temperature reduction pipeline caused by the fact that the temperature reduction pipeline is washed by the temperature reduction water and holes are formed in the same cross section of the temperature reduction pipeline too much are solved.

Drawings

FIG. 1 is a schematic view of an overall structure for embodying a desuperheater in the embodiment;

FIG. 2 is an enlarged schematic view of a portion C of FIG. 1;

FIG. 3 is a schematic cross-sectional view taken along the line A-A in FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along the line B-B in FIG. 1;

FIG. 5 is a schematic side view of an embodiment of a desuperheater;

in the figure, 1, a mixing pipe; 101. reducing the diameter of the pipeline; 102. a venturi tube; 2. a nozzle assembly; 203. an elastic member; 204. capping; 201. a nozzle body; 202. a nozzle core; 3. a desuperheating water line; 301. a three-way joint; 302. an annular tube; 303. a water diversion pipe; 4. a nozzle holder; 5. a nozzle valve body; 6. a nozzle valve cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

The term "inlet end" in this application means the entry end and the exit end of the desuperheating water, and "inlet" and "outlet" means, respectively, the end into which the primary steam enters and the end out of the same.

Example (b):

a desuperheater, as shown in fig. 1 and 2, includes a mixing pipe 1 and a nozzle assembly 2. Ten nozzle assemblies 2 are arranged annularly along the mixing duct 1. Mixing tube 1 includes reducing pipe 101 and venturi 102, venturi 102 sets up inside reducing pipe 101, nozzle assembly 2 includes nozzle body 201, nozzle core 202, elastic component 203 and block 204, nozzle core 202 slides and wears to establish in nozzle body 201, the entrance point at nozzle body 201 is established to block 204 lid, elastic component 203 cover is established on nozzle core 202, the elasticity size of the elastic component 203 in different nozzle assembly 2 is different, through setting up the different elasticity of elastic component 203, control nozzle core 202 elastic sliding, realize the regulation of reducing the temperature discharge. Wherein the elastic member 203 is a spring.

As shown in fig. 2, 3 and 4, ten nozzle assemblies 2 are mounted on the tube body of the mixing duct 1 in two groups, and the first group of four and the second group of six are staggered along the outer circumference of the mixing duct 1. Ten nozzle assemblies 2 are marked as a part (r) -part (r), wherein the part (r) -part) is a first group of nozzles) and is arranged annularly; (c) r is the second group of nozzles and is arranged annularly, wherein (c) and (c) are arranged oppositely, and (c) and (r) are arranged adjacently, and (c), (b), (c) and (c) are respectively arranged at two sides of (c) and (c) connecting lines, and the pressure is sequentially from small to large: r- (c) - (r) - (c) - (r). When the temperature is reduced by spraying the temperature-reduced water with a small flow rate, the nozzle assembly 2 with the lower pressure of the elastic member 203 performs spraying work, and the spraying flow rate needs to be increased, at this time, the nozzle assembly 2 with the higher pressure of the elastic member 203 starts to work, and all the nozzle assemblies 2 work together until the maximum flow rate is reached. Make nozzle assembly 2 dispersion setting, avoided nozzle assembly 2 all to set up at the same cross-section of reducing pipe 101, lead to reducing pipe 101 intensity to take place to break and the big problem of stress deformation inadequately.

As shown in fig. 1 and 2, in order to make it easier for a worker to disassemble the nozzle assembly 2, a nozzle holder 4 is installed outside the nozzle body 201, a nozzle valve body 5 is installed outside the nozzle holder 4, and a nozzle valve cover 6 is installed at one end of the nozzle valve body 5 far away from the nozzle body 201. The nozzle valve cover 6 is detachably connected with the nozzle body 201 through bolts. The nozzle valve body 5 is welded to the reducing pipe 101.

As shown in fig. 1, 2 and 5, a temperature-reducing water pipeline 3 is connected to the nozzle holder 4, the temperature-reducing water pipeline 3 includes a three-way joint 301, an annular pipe 302 and a water diversion pipe 303, one end of the three-way joint 301 is connected to an external water supply system, the other two ends of the three-way joint 301 are respectively communicated with two ends of the annular pipe 302, ten water diversion pipes 303 are communicated with the periphery of the annular pipe 302, and an outlet of each water diversion pipe 303 is communicated with the nozzle holder 4. The water distribution pipes 303 are different in length and are used to supply water to the first group of nozzles and the second group of nozzles, respectively. Through the setting of desuperheating water pipeline 3, realize the quick water supply to nozzle assembly 2.

The specific implementation process comprises the following steps: turning on a switch of an external water inlet system, allowing the temperature-reduced water to enter the nozzle assembly 2 through the three-way joint 301, the annular pipe 302 and the water distribution pipe 303 and then enter the venturi tube 102 for injection; when the flow of the temperature-reducing water is small, the nozzle assemblies 2 with small pressure of the elastic piece 203 perform spraying work, the spraying flow of the temperature-reducing water is increased, at the moment, the nozzle assemblies 2 with large pressure of the elastic piece 203 start spraying, and all the nozzle assemblies 2 work together until the maximum flow is reached; at this time, the primary steam enters from the inlet of the mixing pipeline 1, then is cooled through the reducing pipeline 101 and the venturi tube 102, and then the cooled secondary steam flows out from the outlet, so that the cooling and pressure reduction processes of the steam are realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (7)

1. The utility model provides a desuperheater, its characterized in that, includes mixing tube (1) and nozzle assembly (2), nozzle assembly (2) set up at least one along mixing tube (1) annular, mixing tube (1) is including reducing pipe (101) and venturi (102), venturi (102) set up inside reducing pipe (101), nozzle assembly (2) are including nozzle body (201), nozzle core (202), elastic component (203) and block (204), nozzle core (202) slide and wear to establish in nozzle body (201), the entrance point at nozzle body (201) is covered in block (204), elastic component (203) cover is established on nozzle core (202), and control nozzle core (202) elastic sliding realizes the regulation of desuperheating water flow.

2. A desuperheater according to claim 1, wherein: the elastic force of the elastic piece (203) in different nozzle assemblies (2) is different.

3. A desuperheater according to claim 1, wherein: the nozzle assemblies (2) are arranged on the pipe body of the mixing pipeline (1) in two groups and are arranged along the periphery of the mixing pipeline (1) in a staggered mode.

4. A desuperheater according to claim 1, wherein: nozzle body (201) externally mounted nozzle seat (4), nozzle seat (4) externally mounted has nozzle valve body (5), nozzle valve lid (6) are installed to the one end of keeping away from nozzle body (201) of nozzle valve body (5).

5. A desuperheater according to claim 4, wherein: the nozzle valve cover (6) is detachably connected with the nozzle body (201).

6. A desuperheater according to claim 1, wherein: be connected with desuperheating water pipeline (3) on nozzle seat (4), desuperheating water pipeline (3) include three way connection (301), annular pipe (302), distributive pipe (303), the one end and the outside water supply system of three way connection (301) are connected, and both ends communicate with the both ends of annular pipe (302) respectively in addition, the periphery intercommunication of annular pipe (302) has at least one distributive pipe (303), the export and nozzle seat (4) the intercommunication of distributive pipe (303).

7. A desuperheater according to claim 6, wherein: the lengths of the water distribution pipes (303) are different, and the water distribution pipes are respectively used for supplying water to the nozzle assemblies (2).

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