KR102162510B1 - Spray type nozzle with uniform spraying function of superheated steam - Google Patents

Abstract

The present invention relates to a spray nozzle for preventing overheating, as a spray-type nozzle that adjusts the temperature of overheated steam by mixing coolant with incoming steam, and is configured to spray cooling water with the flow of overheated steam in a steam overheating reduction device. It relates to an improved valve element for the spray nozzle assembly of an abatement device.
This spray type nozzle is made of a through structure, a steam inlet made of steam inlet holes is formed on the upper surface to allow superheated steam to flow in, and a cooling water inlet made of cooling water inlet holes is formed on the outer surface to allow cooling water to flow in. Inside, there is a nozzle body provided with a mixing space so that the introduced steam and the introduced coolant are mixed, and the lower part is provided with a discharge taper part and an injection part connected to the discharge taper part by being spaced apart from each other, and the injection part It is connected integrally and is fastened to the nozzle housing by a nut member fixing the nozzle shaft.
In particular, cooling water is introduced into the body of the spray-type nozzle to control the temperature of the superheated steam, and the coolant inlets are configured to be inclined downward toward the inside, so that non-uniform coolant does not occur in the coolant mixed with superheated steam in the mixing space. There is an effect of uniform mixing of cooling water and superheated steam and improving discharge efficiency.
Accordingly, it is possible to improve reliability and system efficiency in fields similar to or related to the field of temperature control of high-temperature steam.

Description

{Spray type nozzle with uniform spraying function of superheated steam}

The present invention relates generally to a steam overheating reducer, and specifically relates to a spray type nozzle having a uniform mixing and spraying function, and more particularly, injecting cooling water into the nozzle body of an atomizer nozzle configured to control the temperature of the superheated steam. The cooling water inlets are formed to be inclined downwards toward the inside, so that non-uniform cooling water is not generated in the mixing process of superheated steam and cooling water in the mixing space, so that the spray type nozzle has a uniform mixing and spraying function that improves the discharge efficiency. About.

In general, many industrial facilities operate with superheated steam and are equipped with superheaters to generate high-temperature superheated steam. Such superheated steam maintains a temperature higher than the saturation temperature at a predetermined pressure. However, it is necessary to control the temperature of the steam because superheated steam can cause damage to the downstream components of the turbine or superheated steam-fueled device. In order to accurately control the steam temperature required by the turbine or other device from the superheater, a process of operating the system as scheduled and correcting the deviation by reducing the temperature of the superheated steam to a set temperature is required. This is referred to as reduction.

For the above-described series of processes, a temperature control device called an overheating reducer must be installed and used, and the principle of the overheating reducer is to reduce the temperature of the overheated steam by spraying coolant, which is a low temperature moisture, to the steam flowing at high temperature and high speed. At this time, the temperature of the steam is reduced by the latent heat of evaporation of the injected cooling water. The cooling water is mixed with the superheated steam and absorbs the heat energy of the steam to control the temperature of the superheated steam, and the mixing method of the superheated steam and the cooling water and the degree of uniformity of mixing are different depending on the spraying method of the cooling water and the fineness of the cooling water particles. , This will affect the overall operation of the system.

In addition, the non-uniform spraying of the cooling water prevents the flow of the superheated steam from being equalized, and the cooling water is not uniformly sprayed over the entire pipe, but is concentrated, so that the steam temperature is not uniformly controlled and condensate water is generated. The generation of stress causes structural damage due to pipe breakage, and as a result, the temperature control required in the control process fails.

Ultimately, the finer particles of the cooling water exposed to the superheated steam and the uniform mixing of the superheated steam and the cooling water increases the efficiency of the superheat reducer and guarantees the stability and efficiency of the system operating the superheat reducer.

In addition, the mixing of superheated steam and cooling water can be improved by spraying the cooling water into a steam pipe in a uniform geometric flow form.The technical device to be referred to in the present invention is installed directly in the pipe through which the steam moves, and the cooling water It relates to a valve element that exceeds the solution of the prior art to achieve reduction of overheating by spraying, and is to increase the efficiency of the overheating reduction device through improved cooling water spraying by mixing superheated steam and cooling water, and within the flow of superheated steam. By increasing the absorption of heat energy of the cooling water, it is possible to spray the cooling water in an even flow pattern and uniform mixing of superheated steam and cooling water.

The above-described invention refers to the background technology in the technical field to which the present invention belongs, and does not mean the prior art.

Registered Patent No. 1581769

The present invention has been devised to solve the above-described conventional problem, and provides an improved valve element for a spray nozzle assembly of a steam superheat reduction device configured to spray cooling water mixed with superheated steam into a flow of superheated steam. .

An object of the invention is to form the cooling water inlets to be inclined downward toward the inside by introducing superheated steam and coolant into the nozzle body of a spray type nozzle to control the temperature of the superheated steam, compared to the coolant mixed with superheated steam in the mixing space. It is an object of the present invention to provide a spray type nozzle having a uniform mixing and spraying function of superheated steam that improves uniform mixing and discharge efficiency by preventing uniform cooling water from being generated, and increases heat exchange efficiency with superheated steam in a steam pipe.

The present invention is a nozzle configured to control the temperature of superheated steam by mixing cooling water with the incoming steam, and has a through structure, a steam inlet made of steam inlet holes so that superheated steam is introduced into the upper surface, and the outer surface A cooling water inlet portion consisting of cooling water inlet holes is formed so that the cooling water flows in, and a nozzle body having a mixing space provided to mix the introduced steam and the introduced cooling water, and inserted into the nozzle body, and an injection portion provided at the lower part of the nozzle body. The injection unit is characterized in that it is made of a nozzle shaft composed of a discharge taper part and injection holes formed in the discharge taper part, and a nut member that couples the nozzle shaft fitted in the nozzle body to the nozzle body.

In addition, the cooling water inlet holes are formed on an outer surface of the nozzle body, and are formed to be inclined downward from the outer surface to the inner surface of the nozzle body.

In addition, the cooling water inlet holes are formed on the outer surface of the nozzle body, and are formed to be inclined downward from the outer surface to the inner surface of the nozzle body, and to be curved in one direction.

In addition, a guide tapered portion is further formed on the bottom surface of the injection portion so as to taper inward.

In addition, the nozzle shaft is characterized in that the acceleration protrusion having an acceleration tapered portion is further formed so as to taper outward so as to move to the mixing space while accelerating the introduced superheated steam.

The present inventor's spray-type nozzle having a uniform mixing and spraying function of superheated steam makes the cooling water inlets for introducing the coolant into the nozzle body of the spray-type nozzle to control the temperature of the superheated steam and forms a curve in one direction, By improving the uniform mixing of the cooling water mixed with superheated steam in the mixing space, it prevents non-uniform cooling water from being generated, and by forming a guide taper inward on the bottom of the spray part, spraying is performed in a hollow method instead of the conventional circular spray method. It has the effect of improving the rapid and uniform mixing of the superheated steam and the cooling water in the pipe due to the effective collision between the superheated steam and the cooling water.

1 is a perspective view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
2 is a bottom perspective view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
3 is a perspective view showing a cross section of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
4 is a front view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
5 is a cross-sectional view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
6 is a perspective view showing a nozzle shaft in a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
7 is a front view showing the nozzle shaft in the spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
8 is a view showing a state of use of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.
9 is a view showing another embodiment of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention and may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

In addition, the following examples are not intended to limit the scope of the present invention, but are presented merely as examples, and there may be various embodiments implemented through the present technical idea.

1 is a perspective view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention, and FIG. 2 is a bottom perspective view showing a spraying type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention. 3 is a perspective view showing a cross-section of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention, and FIG. 4 is a front view showing a spraying type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention. 5 is a cross-sectional view showing a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention, and FIG. 6 is a perspective view showing a nozzle axis in a spraying type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention. 7 is a front view showing the nozzle axis in the spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention, and FIG. 8 is a use of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention. It is a view showing the state, Figure 9 is a view showing another embodiment of a spray type nozzle having a uniform mixing and spraying function of superheated steam according to the present invention.

As shown in the drawing, a spray type nozzle 10 having a uniform mixing and spraying function of superheated steam (hereinafter referred to as an atomizer nozzle for convenience of description) is used to adjust the temperature of the superheated steam by mixing cooling water with the incoming steam. As a nozzle to be adjusted, such a spray type nozzle 10 is composed of a nozzle body 20, a nozzle shaft 30, and a nut member 40.

The nozzle body 20 is made of a metal material and is formed in a through tube structure.

The upper surface of the nozzle body 20 is formed with a steam inlet 21 consisting of steam inlet holes 211 to allow superheated steam to flow in, as shown in FIGS. 1 and 5, and a cooling water inlet hole to allow cooling water to flow into the outer surface. A cooling water inlet 22 made up of 221 is formed, and a mixing space 23 is provided so as to mix the introduced superheated steam and the introduced cooling water.

At this time, a circular through-hole is formed on the inner upper portion of the nozzle body 20, and the upper portion of the nozzle shaft 30 is fitted through.

The vapor inlet holes 211 are arranged in an annular shape as in FIG. 1 on the upper surface of the nozzle body 20, and are formed to be inclined inward from the top to the bottom as in FIG. 5 to be described later in the nozzle shaft 30 It is supplied to the acceleration protrusion 32 to be guided.

The cooling water inlet hole 221 is formed while surrounding the outer surface of the nozzle body 20 so as to be in communication with the mixing space 23 while maintaining a certain distance, and is formed to be stacked up and down as shown in the drawing to form the mixing space. Cooling water is introduced to (23).

Here, the cooling water inlet holes 221 are formed on the outer surface of the nozzle body 20, and are formed to be inclined downward from the outer surface to the inner surface of the nozzle body 20, so that the cooling water is supplied inclined downward and moved downward. By moving downwards with superheated steam, it is possible to increase the transfer efficiency and reduce friction with the coolant inlet hole 221 compared to the coolant inlet hole 221 formed horizontally on the drawing, and non-uniform coolant is generated. You will be able to reduce what is being done.

Referring to FIG. 9, the cooling water inlet holes 221 are formed on the outer surface of the nozzle body 20, are formed to be inclined downward from the outer surface to the inner surface of the nozzle body 20, and are curved in one direction, Friction can be reduced and the generation of non-uniform coolant can be reduced, and the coolant moving along the curved coolant inlet hole 221 is supplied to the mixing space 23 in a vortex form to uniformly cool the superheated steam. Is mixed and the movement efficiency can be increased again.

The water introduced through the cooling water inlet hole 221 is vaporized by the steam introduced through the steam inlet hole 211, and the temperature of the introduced steam can be lowered due to the latent heat of evaporation.

The nozzle body 20 is provided with an installation space therein, and a vibrator, which is a vibrator, is further embedded in the installation space to vibrate, so that the vibration is transmitted to the incoming water to form bubbles, thereby forming bubbles and steam in the mixing space 23. It is preferable to increase the efficiency of vaporization during mixing and to increase the mixing efficiency.

One end of the bubble pins is further welded and fixed to the inner surface of the cooling water inlet hole 221 so that bubbles are formed in the cooling water moved by the bubble pins to be discharged, thereby improving the vaporization efficiency and rapidly increasing the temperature of the steam. It is desirable to be able to control it.

On the inner side of the nozzle body 20, a spiral vortex groove is further formed to be disposed in the mixing space 23, so that steam and water move in a vortex form in the mixing space to be mixed, thereby uniform mixing and mixing. It is possible to increase the efficiency, and it is preferable to increase the discharge efficiency through the injection hole 321.

The nozzle shaft 30 is formed in a circular shaft shape, made of a metal material, and fitted into the nozzle body 20, and the spraying part 31 is integrally provided in the lower part, and the spraying part 31 is a discharge taper part. It consists of 311 and spray holes 312 which are formed to be inclined in a diagonal direction while maintaining a predetermined interval in the discharge tapered part 311.

It is preferable that the diameter of the upper portion of the nozzle shaft 30 is formed to be the same as the diameter of the through hole, so that superheated steam and cooling water are prevented from flowing back through the through hole.

A threaded portion is formed on an outer surface of the upper end of the nozzle shaft 30, and the threaded portion is disposed to be exposed to the outside through the through hole, and fastened by the nut member 40 to connect the nozzle shaft 30 to the nozzle. It is fixed inside the body 20.

At this time, the lower diameter of the nozzle shaft 30 is formed to be smaller than the inner diameter of the mixing space 23, so that the cooling water is mixed along the space between the lower part of the nozzle shaft and the inner surface of the mixing space 23. As the cooling water is evaporated by the steam, the mixed superheated steam is moved downward, so that it can be discharged to the outside through the injection hole 312.

Here, an annular support surface is formed to be tapered at an inner lower portion of the nozzle body 20, and the discharge tapered portion 311 of the injection unit 31 is supported while being in close contact with the support surface.

A guide taper part 313 is further formed on the bottom surface of the spray part 31 to taper inward, so that a part of the superheated steam sprayed through the spray hole 312 moves along the guide taper part or the nozzle housing 200 ) As it moves along the guide taper part 313 by internal pressure or airflow, uniform spraying is possible, and superheated steam can be supplied to the lower part of the spraying part 31 as well.

The nozzle shaft 30 is further formed with a circular acceleration protrusion 32 having an acceleration taper portion 321 formed thereon so as to taper outwardly so as to move to the mixing space 23 while accelerating the introduced superheated steam.

The acceleration protrusion 32 is disposed above the mixing space 23, the diameter of the acceleration protrusion 32 is formed smaller than the inner diameter of the mixing space 23, and the nozzle disposed in the mixing space 23 By forming larger than the lower diameter of the shaft 30, the space width between the acceleration protrusion 32 and the mixing space 23 is smaller than the space width between the lower part of the nozzle shaft 30 and the mixing space 23 By being formed, the superheated steam introduced into the steam inlet 211 is accelerated and flows into the mixing space 23, is mixed with cooling water, and then discharged through the injection hole 312 to improve discharge efficiency.

An ejection space is formed inside the acceleration protrusion 32, a ejection pen is installed in the ejection space, an annular ejection inclined surface is formed on the lower edge of the acceleration protrusion 32, and the ejection inclined surface is Forming holes to communicate with the space, by driving the ejection pen to discharge the wind through the ejection hole to the mixing space 23, the mixing space 23 by the wind discharged from the exit hole It is preferable to improve the discharge efficiency by moving the steam and water mixed in the downward direction to be discharged through the injection hole 321.

The nut member 40 is fastened to and fixed to the nozzle shaft 30 fastened to the nozzle body 20 so that the upper end thereof is exposed to the outside.

When explaining the use state of the spray type nozzle 10 having the function of uniform mixing and spraying of superheated steam configured as above, first, the nozzle housing 200 is installed in the steam housing 100, and the annular coolant flows into the inner periphery. Installation is completed by inserting and fixing the atomizer nozzle to the nozzle housing 200 having a space.

Thereafter, superheated steam is introduced through the steam housing 100 and cooling water is introduced into the nozzle housing 200, and the steam and cooling water introduced through the steam inlet hole 211 and the cooling water inlet hole 221 Is mixed in the mixing space 23 to lower the temperature of the steam to a set temperature, and then sprayed through the injection hole 312 to move, thereby completing a series of processes.

One embodiment of the present invention described above is merely exemplary, and those of ordinary skill in the technical field to which the present invention belongs will appreciate that various modifications and other equivalent embodiments are possible. . Therefore, it will be appreciated that the present invention is not limited to the form mentioned in the detailed description above. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims. In addition, the present invention is to be understood as including the spirit of the present invention as defined by the appended claims and all modifications, equivalents and substitutes within the scope thereof.

10: spray type nozzle 20: nozzle body
30: nozzle shaft 40: nut member
21: steam inlet 211: steam inlet hole
22: cooling water inlet 221: cooling water inlet hole
23: mixing space
31: injection part 311: discharge tapered part
312: spray hole 313: guide taper
32: acceleration protrusion 321: acceleration taper portion
100: steam housing 200: nozzle housing

Claims (5)

As a nozzle to control the temperature of superheated steam by mixing cooling water with the incoming steam,
It is made of a through structure, and a steam inlet made of steam inlet holes is formed on the upper surface to allow the introduction of superheated steam, and a cooling water inlet made of cooling water inlet holes is formed on the outer surface. A nozzle body provided with a mixing space so that the introduced cooling water is mixed;
A nozzle shaft fitted to the nozzle body, provided at a lower portion of the nozzle, and configured of a discharge taper portion and a jet hole formed in the discharge taper portion; And
In the spray type nozzle having a uniform mixing and spraying function of superheated steam comprising a nut member that couples the nozzle shaft fitted in the nozzle body to the nozzle body,
The cooling water inlet holes are formed on the outer surface of the nozzle body, and are formed to be inclined downward from the outer surface to the inner surface of the nozzle body,
The nozzle shaft is further formed with an acceleration protrusion having an acceleration taper portion formed thereon so as to taper outward so that the introduced superheated steam is accelerated and moved to the mixing space,
An ejection space is formed inside the acceleration protrusion, an ejection pen is installed in the ejection space, and an annular ejection slope is formed at the lower edge of the acceleration projection, and an ejection hole communicates with the ejection space on the ejection slope. By forming the blower pen to discharge the wind into the mixing space through the ejection hole, and the steam and water mixed in the mixing space are moved downward by the wind discharged from the ejection hole, By allowing it to be discharged through the injection hole, the discharge efficiency is improved,
A spiral vortex groove is further formed on the inner side of the nozzle body to be disposed in the mixing space, so that the steam and water move in a vortex form in the mixing space to be mixed, so that uniform mixing is achieved. Spray type nozzle with uniform mixing and spraying function of superheated steam.
delete The method of claim 1,
The cooling water inlet holes are formed on the outer surface of the nozzle body, the spray type nozzle having a uniform mixing and spraying function of superheated steam, characterized in that it is formed to be inclined downward from the outer surface to the inner surface of the nozzle body and curved in one direction. .
The method of claim 1,
A spray type nozzle having a uniform mixing and spraying function of superheated steam, characterized in that a guide taper part is further formed on the bottom of the spray part to taper inward.



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