KR101663310B1 - Spray nozzle and multi-effect distillator using the same - Google Patents

Abstract

The present invention relates to a spray nozzle and a multi-effect distillation apparatus including the spray nozzle. More particularly, the present invention relates to a spray nozzle and a multi-effect distillation apparatus including the spray nozzle. More particularly, To a spray nozzle for application to a distillation apparatus (MED).
According to the present invention, even when the large-capacity (100 lpm or more) operation is performed, the pressure loss is as small as 0.5 bar or less, the wide injection angle is 110 ° or more, the space mass flow distribution and the injection effective area are uniform, ), Which can reduce the cost of the product and enable mass production.

Description

[0001] SPRAY NOZZLE AND MULTI-EFFECT DISTILLATOR USING THE SAME [0002]

The present invention relates to a spray nozzle and a multi-effect distillation apparatus including the spray nozzle. More particularly, the present invention relates to a spray nozzle and a multi-effect distillation apparatus including the spray nozzle. More particularly, To a spray nozzle for application to a distillation apparatus (MED).

In general, desalination equipment is a facility for producing fresh water that can be used as living water or industrial water from seawater and sewage. It is used for multiple stage flash (MSF), multi-effect distillation MED). In addition, reverse osmosis (RO), which uses pressure as a membrane filtration method, may be used. In recent years, a combination of two or more of the above-mentioned methods has been used to improve the yield and efficiency of fresh water And a hybrid type (hybrid type) for raising the temperature.

Among them, the desalination plant by the multi-utility evaporation method includes an evaporator composed of several stages, a condenser in which an evaporator and high-temperature steam pass through each stage, and a spray nozzle for spraying seawater Respectively.

In addition, each stage is connected to the steam supply pipe from the first stage to receive the steam sequentially, and the condenser at each stage is connected to the fresh water return pipe to discharge the fresh water produced by the fresh water pump, blowdown outlet pipe, so that the concentrated hydrochloric water formed by the hydrochloric acid discharge pump can be discharged to the outside.

First, high-temperature steam is supplied to the condenser at the first stage, and the sea water is supplied through the spray nozzle to perform heat exchange with the condenser tube. As a result, steam is generated in the evaporation chamber of each stage, and the steam inside the condenser tube is condensed to produce fresh water, and the steam acts as the heat source of the next stage through the steam supply pipe.

The nozzles installed at the upper part of each stage of the conventional multi-effect evaporation apparatus (MED) are required to provide a large amount of treated water (sea water) for spraying a large amount of treated water in a short period of time in order to reduce OPEX, (Pressure drop) becomes too large, and the spraying of the treatment water concentrates in the outer area of the denominator area, so that uniform spraying can not be performed. As the treatment water can not be evenly contacted with the outer wall of the condenser heat exchange tube, scale is generated and the pipe is corroded, ultimately reducing heat exchange efficiency, that is, the efficiency of distillation.

Korean Patent Publication No. 2009-0067902 (published on June 25, 2009, 'Method of supplying heat source for hybrid type desalination equipment')

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a nozzle body in which an orifice-shaped jetting portion is formed at a distal end portion of a nozzle body and a swirler is inserted into the nozzle body , A spray nozzle for a multi-effect evaporator capable of even spraying at a wide spray angle of 110 ° or more while the pressure loss is less than 0.5 bar even when operated at a high flow rate of 100 lpm or more.

In order to achieve the above object, according to an embodiment of the present invention, there is provided a spray nozzle (A) for spraying a fluid provided on an upper part to a lower portion in a concentric manner, A hollow nozzle body 10; The inner diameter D of the nozzle body 10 is reduced so that the inner wall of the nozzle body 10 is tapered toward the downstream side so as to form the minimum diameter d of the nozzle body 10, (20) in which an injection port (21) extending at a predetermined angle (? 1) is formed. And a nozzle 20 which is inserted into a predetermined section of the nozzle body 10 on the upstream side of the jetting section 20 and which provides a swirling movement to the fluid before the jetted fluid is jetted from the jetting section 20 And a swirler (30).

The ratio d / D of the inner diameter D and the minimum diameter d of the jetting section 20 may be 25 to 35% and the predetermined angle? 1 of the jetting section 20 may be 100 to 120 DEG.

The swirler (30) includes a swirler body (31) inserted into the nozzle body (10); A central flow path 32 formed at the center of the swirler body 31; And at least one side flow passage (33) formed at an outer side of the swirler body (31) and having a predetermined angle (? 2) grooves with respect to the central flow path (32) The number of the side flow paths 33 may be four or four or four on each side of the center flow path 32. The sectional area S1 of the center flow path 32 may be equal to The ratio S1 / S2 of the total sectional area S2 of the side flow path 33 is 10 to 20% or the sectional area S of the swirler body 31 and the center flow path 32 and the side flow path 33, It is more preferable that the ratio (S1 + S2) / S of the sum of the cross-sectional areas (S1 + S2)

According to another aspect of the present invention, there is provided a multi-stage chamber including a plurality of pipes disposed in a continuously disposed multi-stage chamber, the water being condensed in the pipe and the heat between the sea water supplied to the outer wall of the pipe (MED) (B) for producing fresh water by evaporating and separating seawater through an exchange, wherein the seawater is atomically sprayed downward in the upper region of the multi-stage chamber, And a spray nozzle (A) for supplying seawater to the outer wall, wherein the spray nozzle (A) comprises: a hollow nozzle body (10) in which a flow path of seawater is formed; The inner diameter D of the nozzle body 10 is reduced so that the inner wall of the nozzle body 10 is tapered toward the downstream side so as to form the minimum diameter d of the nozzle body 10, (20) in which an injection port (21) extending at a predetermined angle (? 1) is formed. And a swirling movement sensor which is inserted into a predetermined section of the nozzle body (10) on the upstream side of the jetting section (20) and gives swirling movement to the seawater before the supplied seawater is jetted from the jetting section Wherein the pressure loss of the spray nozzle A is 0.5 bar or less and the angle θ at which the seawater is jetted from the jetting unit 20 is 110 to 120 ° By weight, based on the total weight of the distillation column.

The ratio d / D of the inner diameter D and the minimum diameter d of the jetting section 20 may be 25 to 35% and the predetermined angle? 1 of the jetting section 20 may be 100 to 120 DEG.

The swirler (30) includes a swirler body (31) inserted into the nozzle body (10); A central flow path 32 formed at the center of the swirler body 31; And at least one side flow passage (33) formed at an outer side of the swirler body (31) and having a predetermined angle (? 2) grooves with respect to the central flow path (32) The number of the side flow paths 33 may be four or four or four on each side of the center flow path 32. The sectional area S1 of the center flow path 32 may be equal to The ratio S1 / S2 of the total sectional area S2 of the side flow path 33 is 10 to 20% or the sectional area S of the swirler body 31 and the center flow path 32 and the side flow path 33, It is more preferable that the ratio (S1 + S2) / S of the sum of the cross-sectional areas (S1 + S2)

The spray nozzle of the present invention as described above and the multi-effect distillation apparatus including the same have a wide spray angle of 110 ° or more and a spatial mass flow rate distribution The injection effective area is uniform and injection molding can be performed with a lightweight material (PE, PP, etc.), resulting in cost reduction and mass production.

1 is a side cross-sectional view of a spray nozzle A of the present invention.
2 is a perspective view and a plan view of a swirler 30 inserted into the spray nozzle A of the present invention.
Fig. 3 is a table showing the spraying angle [theta] of the nozzle according to the angle [phi] 1 of the orifice in the spray nozzle A of the present invention.
4 is a photograph showing a state in which the spray nozzle A according to the present invention is sprayed from a nozzle according to an angle? 1 of an orifice.
5 is a graph showing the degree of pressure drop according to the flow amount Q and swirl grooves, that is, the number of side flow paths 33. As shown in FIG.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Prior to the description, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and should be construed in accordance with the technical concept of the present invention.

Throughout this specification, when a member is " on " another member, this includes not only when the member is in contact with another member, but also when there is another member between the two members.

Throughout this specification, when an element is referred to as "including" an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

According to a preferred embodiment of the present invention, the nozzle body 10 includes a hollow nozzle body 10, an injection part 20 injected in an orifice structure, and a swirler 30 inserted into the nozzle body 10 , And a spray nozzle (A) provided on the upper part of the apparatus for atomically spraying the supplied fluid downward. A side sectional view of the spray nozzle A of the present invention is shown in Fig.

First, the nozzle body 10, which is one component of the present invention, is a hollow member in which a flow path for supplying fluid is formed, and is a member that serves as an entire housing of other components. The nozzle body 10 is installed so as to be downwardly positioned above the apparatus requiring spraying.

A jetting portion 20 is provided at the distal end of the nozzle body 10 to spray the supplied fluid. The jetting portion 20 is formed by changing the shape of the inner wall of the nozzle body 10 so that the inner diameter D is reduced so that the inner wall of the nozzle body 10 is tapered from a certain region toward the downstream side, After the diameter d is obtained, the injection port 21 is formed by opening at a predetermined angle? 1 in an orifice structure.

At this time, the ratio (d / D) of the inner diameter D and the minimum diameter d of the inner wall of the nozzle body 10 in the region forming the jetting section 20 is preferably 25 to 35%. When the ratio d / D is less than 25%, the minimum diameter d of the jetting section 20 is too narrow to obtain a sufficient jetting angle and the pressure drop becomes excessively large. d / D) exceeds 35%, a sufficient flow rate can not be ensured and uniform injection is not easy.

It is preferable that the angle? 1 at which the jetting port 21 is opened in the orifice region constituting the distal end of the jetting section 20 is 100 to 120 degrees. It is necessary to control the angled angle? 1 within the above-mentioned range to ensure a jet angle? Of 110 ° or more and a wide and uniform jetting area under a sufficient flow rate, a small pressure drop, and a large-

The swirler 30, which is another constituent element of the spray nozzle A of the present invention, is inserted into a certain section of the nozzle body 10 on the upstream side of the jetting section 20, Is a member for imparting a swirling movement to the supply fluid before being sprayed through the discharge port (20). 2 is a perspective view and a plan view of the swaller 30.

The swirler 30 includes a swirler body 31 inserted and fixed in the nozzle body 10, a central flow path 32 formed in the center of the swirler body 31 in a hollow shape, a swirler body 31 And at least one side flow path 33 formed in the shape of a groove in the outer periphery of the side wall 33. [

1, the side flow path 33 can be specified to be inclined at a predetermined angle? 2 with respect to the central flow path 32 in the lateral direction as shown in FIG. 1, and the inclined angle? 2 ) Is preferably 20 to 40 degrees. When the angle? 2 is less than 20, sufficient swirling motion can not be imparted to the supply fluid. As a result, the angle of spray becomes small. When the angle? 2 exceeds 40, As the side flow path 33 is excessively inclined, the atomization angle causes the mass distribution in the spraying area to be broken apart, which makes uniform distribution difficult.

On the other hand, it is preferable that the ratio (S1 / S2) of the sectional area S1 of the central flow path 32 to the total sectional area S2 of the side flow path 33 is 10 to 20%. If the ratio S1 / S2 is less than 10%, the sectional area of the center flow path 32 becomes excessively narrow, so that only the fluid imparted with the swirling motion through the side flow path 33 is excessively sprayed, If the ratio S1 / S2 exceeds 20%, on the other hand, the amount of fluid to be moved through the central flow path 32 becomes excessively large, which causes a problem of uneven spraying.

Sectional area S1 of the swirler body 31 (total sectional area including the region where the flow path is formed) and the sectional area of both the central flow path 32 and the side flow path 33, that is, the total sectional area S1 + S2) ((S1 + S2) / S) is preferably 20 to 30%. If the ratio of the flow area to the area where the flow path is formed is less than 20%, the swirler is subjected to excessive pressure, and the flow rate of the fluid discharged through the swirl roller becomes excessively high, If it exceeds 30%, the width of the region where the flow path is formed becomes excessively wide, and the pressure enough to rotate the inserted swirler can not be sufficiently applied, so that there is a problem that the spraying is not sufficient in the spray region of the edge region , It is not easy to ultimately obtain a wide spray angle and uniformly uniform spray.

According to another preferred embodiment of the present invention, a plurality of pipes are provided in a multistage chamber continuously arranged in order to evaporate and separate seawater through heat exchange between water vapor condensed in the pipe and seawater supplied to the outer wall of the pipe A multi-function distillation apparatus (MED) equipped with a spray nozzle (A) for uniformly supplying seawater to an outer wall of a pipe by spraying seawater to a lower portion of the multi-stage chamber in an upper region of the multi- to provide.

The spray nozzle A provided at the upper part of each chamber is composed of the nozzle body 10, the spray part 20 and the swirler 30 as described above, and is sprayed through the spray nozzle A at 100 lpm the pressure loss is less than 0.5 bar and the injection angle (θ) is in the range of 110 ~ 120 ° even under the conditions of supplying large volume of seawater over a liter per minute or more, and the mass distribution of the sprayed region is uniform have.

Hereinafter, embodiments of a spray nozzle and a multi-function distillation apparatus including the same according to the present invention will be described. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. shall.

≪ Measurement of spray angle (&thetas;) &

Experiments were performed to measure the spray angle (?) Using the spray nozzle (A) of the present invention. A spray nozzle (A) was installed on the upper part of the apparatus, and an angle (?) Sprayed to an area of 500 to 600 mm in length of 400 to 500 mm below the installed area was measured. Further, the nozzle exit angle? 1 was changed to 0 占 and 120 占 respectively.

Fig. 3 is a schematic view schematically showing the measured spray angle?, And Fig. 4 is a photograph of a sprayed state.

Referring to FIGS. 3 and 4, when the nozzle exit angle? 1 was set at 120 °, an injection angle? Of 110 ° or more was obtained, and it was confirmed that the nozzle had a uniform mass distribution over the entire spray area I could.

<Measurement of Pressure Drop According to the Number of Side Flow Channels 33 and Supply Flow Rate of Swirl Waller 30>

(Q, lpm) of the supply fluid and the number of swirl grooves, that is, the pressure drop corresponding to the number of side flow paths 33 were measured. 5 is a graph of measured results.

5, when the flow rate is 50 lpm or less, the number of side flow paths 33 is 2 when the flow rate is 50 lpm or less. When the number of the side flow paths 33 is more than 50 lpm, , And specifically showed a pressure drop of 0.5 bar level or less. Therefore, when handling large-capacity seawater of 100 lpm or more, it is understood that the provision of the four side flow paths 33 is advantageous in obtaining a pressure drop value of 0.5 bar or less.

The present invention is not limited to the above-described specific embodiment and description, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention as claimed in the claims. And such modifications are within the scope of protection of the present invention.

A: Spray nozzle
D: the inner diameter of the nozzle body 10
d: the minimum diameter of the nozzle body 10
? 1: Angle of opening of the orifice in the jetting section (20)
? 2: Angle (?) Of the side flow path (33) with respect to the central flow path (32)
?: Spray angle of spray nozzle (A)
S: total sectional area of the swirler body 31
S1: sectional area of the central flow path 32
S2: total sectional area of the side flow path 33
10: nozzle body
20:
21: nozzle
30: Swallar
31: Swallower body
32:
33:

Claims (16)

A spray nozzle (A) installed at an upper part and spraying a supplied fluid in a concentric manner downward,
A hollow nozzle body 10 in which the fluid flow path is formed;
The inner diameter D of the nozzle body 10 is reduced so that the inner wall of the nozzle body 10 is tapered toward the downstream side so as to form the minimum diameter d of the nozzle body 10, (20) in which an injection port (21) extending at a predetermined angle (? 1) is formed. And
The fluid is inserted into a predetermined section of the nozzle body 10 on the upstream side of the jetting section 20 and is supplied with a swirling movement of the fluid before the jetted fluid is jetted from the jetting section 20 A swirler 30,
The ratio (d / D) of the inner diameter D and the minimum diameter d of the jetting section 20 is 25 to 35%
Wherein the predetermined angle [phi] 1 of the jetting section (20) is 100 to 120 [deg.]. delete delete The method according to claim 1,
The swirler (30)
A swirler body (31) inserted into the nozzle body (10);
A central flow path 32 formed at the center of the swirler body 31; And
At least one side flow path (33) formed at an outer side of the swirler body (31) and having a predetermined angle (? 2) grooves with respect to the central flow path (32) with respect to a lateral direction;
. The method of claim 4,
Wherein two to four side flow paths (33) are provided. The method of claim 4,
Wherein four side flow paths (33) are provided at four sides with respect to the center flow path (32). The method of claim 4,
Wherein the ratio (S1 / S2) of the cross-sectional area (S1) of the central flow path (32) to the total cross-sectional area (S2) of the side flow path (33) is 10 to 20%. The method of claim 4,
The ratio (S1 + S2) / S of the sum of the sectional area S of the swirler body 31 and the sectional area S1 + S2 of the central passage 32 and the side passage 33 is 20 to 30% Is sprayed on the spray nozzle. There is provided a multi-effect distillation apparatus for producing fresh water by evaporating and separating seawater through heat exchange between water vapor condensed in the pipe and seawater supplied to the outer wall of the pipe, Multi-Effect Distillator, MED) In (B)
And a spray nozzle (A) spraying the seawater to the lower portion in a circular shape to supply seawater to the outer wall of the pipe,
The spray nozzle (A)
A hollow nozzle body 10 in which a flow path of seawater is formed;
The inner diameter D of the nozzle body 10 is reduced so that the inner wall of the nozzle body 10 is tapered toward the downstream side so as to form the minimum diameter d of the nozzle body 10, (20) in which an injection port (21) extending at a predetermined angle (? 1) is formed. And
The swirling motion of the swirling motion is transmitted to the swirling motion of the swirling motion of the swirling motion of the swinging motion a swirler 30,
The ratio (d / D) of the inner diameter D and the minimum diameter d of the jetting section 20 is 25 to 35%
The predetermined angle [phi] 1 of the jetting section 20 is 100 to 120 [deg.],
Wherein the pressure loss of the spray nozzle (A) is 0.5 bar or less, and the angle (?) At which the seawater is injected from the jet part (20) is 110 to 120 °. delete delete The method of claim 9,
The swirler (30)
A swirler body (31) inserted into the nozzle body (10);
A central flow path 32 formed at the center of the swirler body 31; And
At least one side flow path (33) formed at an outer side of the swirler body (31) and having a predetermined angle (? 2) grooves with respect to the central flow path (32) with respect to a lateral direction;
&Lt; / RTI &gt; The method of claim 12,
Wherein the number of the side flow channels (33) is two to four. The method of claim 12,
Wherein the side flow path (33) is provided in four directions on the basis of the central flow path (32), and the processable flow rate of the spray nozzle (A) is not less than 100 lpm (liter per minute) . The method of claim 12,
Wherein a ratio (S1 / S2) of a cross-sectional area (S1) of the central passage (32) to a total cross-sectional area (S2) of the side passage (33) is 10 to 20%. The method of claim 12,
The ratio (S1 + S2) / S of the sum of the sectional area S of the swirler body 31 and the sectional area S1 + S2 of the central passage 32 and the side passage 33 is 20 to 30% By weight.

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