JP2017159227A - Dispersion nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve enhancement of dispersibility of powders.SOLUTION: A dispersion nozzle 1 comprises: gas injection means 2 comprising an injection port 3 for injecting air 4 as a jet flow; a mixing agitation part 5 which circulates the jet flow of air 4 injected from the injection port 3 from an axial direction one end side 5a to the other side 5b; and a powder supply part 6 which supplies powders 7, which are pneumatically transported, to the axial direction one end side of the mixing agitation part 5. In the mixing agitation part 5, the jet flow of air 4, which advances while expanding a diameter thereof, contacts an inner surface on the other end side 5b in an axial direction. The powders 7 supplied from the power supply part 6 is agitated in such a manner that the powders are pulled into the jet flow of air 4 circulating in the mixing agitation part 5, and even if there is an aggregate in the powders, aggregation thereof is released and the powders are dispersed. The jet flow of air 4 in the state that the powders 7 after passing the mixing agitation part 5 are dispersed is supplied to a gas passage b for an exhaust gas after adjusting a pressure through a diffuser 15.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dispersion nozzle for dispersing and supplying supply target particles such as powder and granules.

  A device that discharges exhaust gas containing soot dust and acidic gas such as hydrogen chloride, such as a waste incinerator, and a dust collector such as a bag filter connected to the exhaust gas flow path as an exhaust gas treatment facility. And means for neutralizing acidic gas in the exhaust gas.

  As a means for neutralizing the acid gas in the exhaust gas, a type in which powder of an alkaline chemical such as slaked lime is blown into the exhaust gas flow channel upstream of the dust collector is often used.

  This type of drug powder is cut out from the drug supply device and storage tank, and then transported by pneumatic transportation. In the pipe where this powder is pneumatically transported, the powder mainly flows through the bottom of the pipe. It is a flowing tube bottom flow. Further, the powder may be partially agglomerated inside the tube bottom flow.

  Therefore, when the powder of the drug that is pneumatically transported is simply put on the flow of air for transportation and supplied to the flow path of the exhaust gas, it may contain aggregates, and in the state including these aggregates, The surface area of the powder (particles) that can be used for the reaction with the acid gas is reduced. In addition, even if the powder powder aggregates are supplied to the exhaust gas flow path, they do not accompany the exhaust gas flow and immediately land on the bottom of the dust collector, contributing almost to the reaction with the exhaust gas. It may be collected together with dust. Generation | occurrence | production of such an unreacted chemical | medical agent invites the increase in a running cost.

  Therefore, a drug supply nozzle having a double cylinder structure having an inner cylinder part and an outer cylinder part is provided on the peripheral wall of the exhaust gas flow path, and the drug is pneumatically transported from either the inner cylinder part or the outer cylinder part. In the past, it has been proposed to supply high-pressure steam from either of the powders. According to this structure, it is supposed that stirring of the powder of the chemical | medical agent supplied can be accelerated | stimulated (for example, refer patent document 1).

Japanese Patent Laid-Open No. 10-128060

  However, since the medicine supply nozzle shown in Patent Document 1 has a configuration in which both the inner cylinder portion and the outer cylinder portion are opened in the exhaust gas flow path, the powder of the medicine comes into contact with the flow of high-pressure steam. Is the point in time when it is blown into the exhaust gas flow path.

  On the other hand, when the drug powder is blown into the exhaust gas flow path, the movable range is expanded to the entire exhaust gas flow path.

  Therefore, in the powder of the medicine blown into the exhaust gas flow path, there is a possibility that a part of the drug powder moves to a region out of the flow of the high-pressure steam. Since the drug powder that has moved to the region deviated from the flow of high-pressure steam in this way is not subjected to agitation by the flow of high-pressure steam, the dispersibility of the agglomerated powder may be reduced.

  Therefore, with the configuration of the nozzle shown in Patent Document 1, the dispersibility of the supply target particles cannot be increased much when supplying the supply target particles such as powder and granules in a dispersed manner.

  Therefore, the present invention aims to provide a dispersion nozzle capable of supplying dispersed supply particles such as powder and granules and further improving the dispersibility of the supply target particles. It is.

  In order to solve the above-described problems, the present invention provides a gas injection unit having a working gas injection port and a jet of the working gas that is disposed on the injection port side of the gas injection unit and is injected from the injection port. A cylindrical mixing and stirring unit that is introduced from one end side in the central direction and flows to the other end side in the axial direction, and supply target particles that are transported by a carrier gas are supplied to one end side in the axial direction of the mixing and stirring unit A particle supply unit, the diameter of the injection port, the diameter of the other end side in the axial direction of the mixing and stirring unit, and the distance from the injection port to the other end side in the axial direction of the mixing and stirring unit, A dispersion nozzle having a configuration in which a jet of working gas that is injected from an injection port and progresses while expanding the inside of the mixing and stirring unit is in contact with the inner surface on the other axial end side of the mixing and stirring unit.

  A diffuser is provided at the other axial end of the mixing and stirring unit, and the outlet of the diffuser is connected to the gas flow path.

  The supply target particles are configured as a powder of a medicine supplied by being dispersed in exhaust gas.

  According to the dispersion nozzle of the present invention, the supply target particles can be supplied in a dispersed manner, and further, the dispersibility of the supply target particles can be improved.

It is the schematic which shows 1st Embodiment of a dispersion | distribution nozzle. It is a figure which expands and shows the mixing stirring part of the dispersion | distribution nozzle of FIG. It is a schematic diagram which shows the usage example of a dispersion | distribution nozzle. It is the schematic which shows the modification of 1st Embodiment of a dispersion | distribution nozzle. It is the schematic which shows 2nd Embodiment of a dispersion | distribution nozzle.

  Hereinafter, the dispersion nozzle of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic cutaway side view showing a first embodiment of a dispersion nozzle. 2 is an enlarged cutaway side view showing a mixing and stirring unit in the dispersion nozzle of FIG. 1. FIG. 3 is a diagram illustrating a usage example of the dispersion nozzle of FIG. 1.

  The dispersion nozzle of this embodiment is indicated by reference numeral 1 in FIG. In this embodiment, as shown in FIG. 3, the dispersion nozzle 1 is installed in a gas flow path b through which the exhaust gas a circulates, and an alkaline drug powder 7 such as slaked lime is supplied as a gas flow. An example in the case of being used to distribute and supply to the path b will be described.

  The basic configuration of the dispersion nozzle 1 of the present embodiment includes a gas injection means 2 having an injection port 3 for air 4 as working gas, and an injection port 3 disposed on the injection port 3 side of the gas injection unit 2. The cylindrical mixing and stirring unit 5 that receives the jet of the air 4 that is received from the axial one end side 5a and flows to the other axial end 5b and the axially one end side 5a of the mixing and stirring unit 5 A powder supply unit 6 as a particle supply unit for supplying the powder 7 is provided.

  Furthermore, the jet of the air 4 injected from the injection port 3 advances while gradually expanding in a substantially conical shape. Paying attention to this, the mixing and stirring unit 5 is configured such that the jet of the air 4 injected from the injection port 3 proceeds while gradually expanding the diameter of the mixing and stirring unit 5, and the other end in the axial direction of the mixing and stirring unit 5. When reaching the side 5b, the diameter (radius r1) of the injection port 3 and the inner diameter (radius) of the axial other end 5b are in contact with the inner surface of the other axial end 5b. r2) and the distance L from the injection port 3 on the other axial end 5b are set.

  In the present embodiment, the gas injection means 2 is a tubular member arranged along a uniaxial direction (left-right direction in FIG. 1). The gas injection means 2 has an air supply unit (not shown) as a working gas supply unit connected to one end side (left end side in FIG. 1) in the axial direction that is the upstream end portion.

  In the gas injection means 2, the other end portion in the axial center direction (the right end portion in FIG. 1) serving as the downstream end portion is an injection port 3 for the air 4. Thereby, the gas injection means 2 can inject the air 4 supplied to the one end side of an axial center direction from an air supply part as a jet from the injection port 3. FIG.

  The mixing and stirring unit 5 is a cylindrical member having an inner diameter larger than the outer diameter of the gas injection means 2. The mixing and stirring unit 5 is arranged coaxially with respect to the gas jetting unit 2, and in this embodiment, one end side (left end side in FIG. 1) 5 a in the axial direction of the mixing and stirring unit 5 is connected to the gas jetting unit 2. Is arranged so as to overlap the outer circumference on the injection port 3 side by a set dimension. Thereby, the mixing stirring part 5 distribute | circulates the jet of the air 4 injected from the injection port 3 of the gas injection means 2 from the axial direction one end side 5a to the axial direction other end side 5b in the position along an axial center. I can do it.

Further, as shown in FIG. 2, the radius r2 of the inner diameter of the mixing stirring unit 5 on the other axial end side 5b and the distance L from the injection port 3 to the other axial end side 5b are, for example, the injection port 3 The following equation (1) is satisfied based on the data of the radius r1 of the diameter and the expansion angle θ from the axial direction when the jet of the air 4 injected from the injection port 3 expands in a substantially conical shape. It should be set as follows.
(R2−r1) / L = tan θ (1)

  As a result, the jet of the expanded air 4 comes into contact with the inner surface of the other end side 5 b in the axial direction of the mixing and stirring unit 5. In FIG. 2, for convenience of illustration, a line indicating the outer shape of the jet of air 4 is illustrated on the inner side of the inner surface of the mixing and stirring unit 5.

  Strictly speaking, the speed of the jet of air 4 decreases as it progresses, and the rate (angle) at which the diameter of the jet of air 4 expands per unit distance gradually increases as the speed decreases. Therefore, in consideration of the change in the ratio of the diameter expansion accompanying the deceleration of the jet of the air 4, the jet of the expanded air 4 is in contact with the inner surface of the axially other end 5 b of the mixing and stirring unit 5. Of course, the radius r2 and the distance L may be determined.

  In addition, the pressure loss when the jet of the air 4 injected from the injection port 3 passes through the mixing and stirring unit 5 does not become excessive, and the jet of the air 4 can be finally blown into the gas flow path b. If the above is satisfied, the distance L may be set longer than the value obtained by the equation (1). Similarly, the radius r2 may be set smaller than the value obtained by the above equation (1). In any of these cases, the jet of air 4 comes into contact with the inner surface of the other axial end side 5b of the mixing and stirring unit 5.

  Further, when the jet of the air 4 injected from the injection port 3 reaches the other axial end 5b of the mixing and stirring unit 5, the jet should be in contact with the inner surface of the axial other end 5b. Of course, the setting of the radius r1, the radius r2, the distance L, and the like may be determined based on the result of numerical analysis using a numerical model or the result of a test performed using a specimen.

  The powder supply unit 6 has a cylindrical portion 8 having a larger diameter than the mixing and stirring unit 5 and disposed on the outer periphery of the gas injection unit 2, one end side in the axial direction of the cylindrical unit 8, and the gas injection unit 2. An annular end wall 9 that closes between the outer surface and a cylindrical shape that gradually decreases in diameter from one end side in the axial direction to the other end side, and one axial end of the cylindrical portion 8 is the axial center. It is set as the structure provided with the reduced diameter cylinder part 10 connected to the other end side of the direction. The other end side in the axial direction of the reduced diameter cylindrical portion 10 is connected to one axial end side 5 a of the mixing and stirring unit 5. As a result, a cylindrical space that surrounds the gas injection means 2 is formed inside the cylindrical portion 8, the end wall portion 9, and the reduced diameter cylindrical portion 10, and this space serves as a dispersion chamber 11.

  A powder transport line 13 for pneumatically transporting the powder 7 cut out from a powder supply device (not shown) by a carrier gas 12 such as air is connected to the cylindrical portion 8 so as to communicate with the dispersion chamber 11. The direction of the powder transport line 13 connected to the tubular portion 8 may be a direction toward the axial center of the tubular portion 8 or may be a direction shifted from the axial center.

  Thereby, in the dispersion chamber 11, when the powder 7 is supplied together with the carrier gas 12 from the powder transport line 13, the powder 7 is dispersed in the circumferential direction of the gas injection means 2 in the dispersion chamber 11. Can do. At this time, when the direction of the powder transport line 13 connected to the cylindrical portion 8 is shifted from the axis of the cylindrical portion 8, the powder transport line 13 supplies the dispersion chamber 11. The carrier gas 12 and the powder 7 form a swirling flow in the dispersion chamber 11. Therefore, in this case, the dispersibility of the powder 7 in the circumferential direction in the dispersion chamber 11 can be further improved.

  In the powder supply unit 6, the opening on the other axial end side of the reduced-diameter cylindrical portion 10 serves as a supply port 14 for the powder 7 to the mixing and stirring unit 5.

  In the present embodiment, a portion near the injection port 3 of the gas injection means 2 is disposed at the axial center position of the supply port 14. Therefore, the powder supply unit 6 according to the present embodiment is configured so that the carrier gas 12 and the powder 7 dispersed in the circumferential direction in the dispersion chamber 11 are disposed on the one end side 5a in the axial direction of the mixing and stirring unit 5 and the gas injection unit 2. It can supply to the position used as the outer periphery of this injection port 3.

  Further, the powder supply unit 6 can supply the carrier gas 12 and the powder 7 in the direction of the parallel flow with respect to the jet of the air 4 injected from the injection port 3 of the gas injection means 2. For this reason, in the mixing and stirring unit 5, the generation of vortices around the jet of air 4 can be suppressed by using the flow of the carrier gas 12 and the powder 7. It is possible to suppress the retention of the body 7 and the wear of the inner surface of the mixing and stirring unit 5 due to the powder 7 caught in the vortex.

  The other end side 5b in the axial direction of the mixing and stirring unit 5 is connected to one axial end side of a diffuser (expanded cylinder) 15 that gradually increases in diameter from one end side in the axial direction to the other end side.

  In the dispersion nozzle 1 of this embodiment, the other end side in the axial center direction of the diffuser 15 is the final outlet 16. Therefore, the other axial end of the diffuser 15 serving as the outlet 16 is connected to the gas flow path b (see FIG. 3).

  Thus, the jet of the air 4 after passing through the mixing and stirring unit 5 passes through the diffuser 15 and is then supplied from the outlet 16 to the gas flow path b. At this time, the diffuser 15 is gradually expanded in diameter from one end side to the other end side in the axial direction, and the cross-sectional area of the flow path is gradually increased. It becomes higher on the other end side than on one end side in the axial direction.

  By the way, in order to blow the jet of air 4 from the dispersion nozzle 1 of this embodiment into the gas flow path b, the static pressure (pressure) of the air 4 near the other end in the axial direction of the diffuser 15 that is just before the outlet 16. ) Is required to be higher than the internal pressure at the location where the dispersion nozzle 1 is installed in the gas flow path b.

  On the other hand, if the static pressure just before the outlet 16 is too high when the jet of air 4 is blown from the dispersion nozzle 1 of this embodiment into the gas flow path b, the jet of air 4 blown into the gas flow path b is It becomes a flow that crosses the flow of the exhaust gas a in the gas flow path b, and is difficult to be dispersed in the flow of the exhaust gas a.

  Therefore, the jet of the air 4 that has passed through the diffuser 15 can be blown from the outlet 16 into the gas flow path b, and the jet of the air 4 blown into the gas flow path b is the flow of the exhaust gas a in the gas flow path b. Therefore, it is desirable that the static pressure of the jet of the air 4 immediately before the outlet 16 falls within a certain pressure range in order to be smoothly dispersed. This pressure range depends on the shape of the gas flow path b at the location where the dispersion nozzle 1 of the present embodiment is installed, the flow velocity distribution and pressure distribution of the exhaust gas a at that location, the installation angle of the dispersion nozzle 1, and the like. It changes depending on.

  In view of this point, the diffuser 15 is arranged in the axial direction of the diffuser 15 so that the static pressure of the jet of the air 4 when it reaches the other end in the axial direction of the diffuser 15 falls within the predetermined pressure range. A diameter and a cross-sectional area of the other end are set.

  When the dispersion nozzle 1 of the present embodiment having the above configuration is used, for example, as illustrated in FIG. 3, the present embodiment is provided on the wall of the gas flow path b for the exhaust gas a connected to the bag filter c. The outlet 16 of the dispersion nozzle 1 is connected in communication. Note that the dispersion nozzle 1 of the present embodiment may be installed in a posture in which the outlet 16 faces sideways as shown by a solid line in FIG. 3, or the outlet 16 is arranged as shown by a two-dot chain line in FIG. 3. You may install in the posture which becomes downward.

  In this state, the gas injection means 2 injects air 4 supplied from an air supply unit (not shown) from the injection port 3 as a jet. Further, the powder 7 that is pneumatically transported through the powder transport line 13 from a powder supply device (not shown) is supplied to the powder supply unit 6 together with the carrier gas 12.

  Thereby, in the mixing and stirring unit 5, the jet of the air 4 injected from the injection port 3 flows from the axial center one end side 5a to the axial center other end side 5b, and the supply port 14 of the powder supply unit 6 The carrier gas 12 and the powder 7 that are dispersed in the circumferential direction in the dispersion chamber 11 are supplied to the outer peripheral side position of the injection port 3 on the one axial end side 5a.

  Around the jet of the air 4 that is jetted from the jet port 3 and flows through the mixing and stirring unit 5, a flow that is attracted by the jet is generated. Therefore, the powder 7 and the carrier gas 12 supplied from the supply port 14 are drawn into the jet of air 4.

  Thus, when the powder 7 is drawn into the jet of air 4, the powder 7 is agitated by the jet of air 4. Therefore, for example, when the powder 7 is pneumatically transported in the powder transport line 13, a tube bottom flow is generated, and even if partial aggregation occurs in the tube bottom flow, the aggregate of the powder 7 is Since the agitation is performed when the air is drawn into the jet of the air 4 flowing through the mixing and agitating unit 5, the aggregation is released.

  Furthermore, the mixing and stirring unit 5 is configured such that the jet of the air 4 injected from the injection port 3 gradually expands in diameter and comes into contact with the inner surface of the other axial end 5b. Passing through the mixing and stirring unit 5 while being not drawn into the jet is prevented.

  Therefore, the powder 7 in a state of being agitated and disperse is discharged together with the jet of the air 4 from the other axial end 5b of the mixing and agitating unit 5.

  After the pressure of the jet of the air 4 containing the powder 7 discharged from the other axial end 5 b of the mixing and stirring unit 5 passes through the diffuser 15, the pressure is adjusted, and then the gas flow path b passes through the outlet 16. Supplied to.

  As described above, the diffuser 15 performs a predetermined pressure adjustment on the jet of the air 4, so that the jet of the air 4 supplied from the outlet 16 to the gas passage b flows through the gas passage b. Is smoothly dispersed in the flowing exhaust gas a. Therefore, the powder 7 supplied with the jet of air 4 is dispersed with respect to the exhaust gas a.

  Thus, according to the dispersion nozzle 1 of the present embodiment, the powder 7 can be distributed and supplied to the gas flow path b in which the exhaust gas a circulates.

  Furthermore, since the powder 7 supplied to the gas flow path b can be agitated by the jet of air 4 when passing through the mixing and agitating unit 5, the aggregation of the aggregate is released. Therefore, the dispersibility of the powder 7 supplied to the gas flow path b can be improved.

  Therefore, the acidic gas contained in the exhaust gas a can be efficiently reacted with the powder 7 and can be efficiently recovered by the bag filter c.

[Modification of First Embodiment]
FIG. 4 is a schematic cutaway side view showing a modification of the first embodiment.

  In FIG. 4, the same components as those shown in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the first embodiment, the dispersion nozzle 1 has a configuration in which the one end side 5a in the axial direction of the mixing and stirring unit 5 is disposed on the outer periphery of the injection port 3 of the gas injection unit 2. As shown in FIG. 4, the injection port 3 of the gas injection unit 2 may be configured to be disposed so as not to overlap the axial direction one end side 5 a of the mixing and stirring unit 5.

  In this case, the injection port 3 is provided in the dispersion chamber 11 of the powder supply unit 6 in an arrangement along the axial direction of the mixing and stirring unit 5.

  Thereby, the jet of the air 4 injected from the injection port 3 enters the mixing and stirring unit 5 from the axial center one end side 5a and flows to the axial center other end side 5b. At this time, when the jet of the air 4 traveling in the mixing and stirring unit 5 while gradually increasing the diameter reaches the other axial end 5b of the mixing and stirring unit 5, the inner surface of the axial other end 5b comes into contact. The points to do are the same as in the first embodiment.

  The dispersion nozzle 1 of this modification having such a configuration can be used in the same manner as the dispersion nozzle 1 of the first embodiment to obtain the same effect.

[Second Embodiment]
FIGS. 5A and 5B show a second embodiment of the dispersion nozzle, in which FIG. 5A is a schematic cutaway side view, and FIG. 5B is a view in the direction of arrows AA in FIG.

  5A and 5B, the same components as those shown in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The dispersion nozzle of this embodiment is shown by the code | symbol 1A in Fig.5 (a), and is arrange | positioned at the injection port 18 side of the gas injection means 17 which has the injection port 18 of the air 4 as working gas, and the gas injection means 17. The cylindrical mixing and stirring unit 19 that receives the jet of the air 4 injected from the injection port 18 from the axial one end side 19a and flows to the other axial end 19b, and the mixing and stirring unit 19 A powder supply unit 20 that supplies the powder 7 to one end side 19a in the axial direction is provided.

  In the present embodiment, the powder supply unit 20 is a tubular member arranged along a uniaxial direction (left-right direction in FIG. 5A).

  The powder supply unit 20 is connected to the same powder transport line 13 as shown in the first embodiment on one end side in the axial direction that is the upstream end portion (left end side in FIG. 5A). . The downstream end of the powder supply unit 20 (the right end side in FIG. 5A) passes the powder 7 and the carrier gas 12 guided from the powder transport line 13 to one axial end one side 19a of the mixing and stirring unit 19. It is set as the supply port 21 supplied to.

  The gas injection means 17 has a cylindrical part 22 having a larger diameter than the powder supply part 20 and disposed on the outer periphery of the powder supply part 20, one end side in the axial direction of the cylindrical part 22, and a powder supply part. An annular thick wall that closes between the annular end wall 23 that closes the outer surface of the tube 20, the other end side in the axial direction of the cylindrical portion 22, and the outer surface of the powder supply portion 20. The injection port forming member 24 is provided. Thus, a cylindrical space is formed inside the cylindrical portion 22, the end wall portion 23, and the injection port forming member 24 so as to surround the powder supply portion 20, and this space is used as the header 25 of the air 4. ing.

  As shown in FIGS. 5 (a) and 5 (b), the injection port forming member 24 penetrates in the plate thickness direction at a plurality of circumferential locations near the middle in the radial direction, for example, four locations away from the powder supply unit 20. An injection port 18 is provided. The base end side located near the header 25 of each injection port 18 is connected to the header 25 in communication.

  Furthermore, each injection port 18 has a distal end side opposite to the header 25 closer to the axial center of the tubular portion 22 than the proximal end side, with respect to the axial direction of the tubular portion 22. It is provided at an inclined angle. The inclination of each injection port 18 is set so that the center line of each injection port 18 indicated by the alternate long and short dash line in FIG. 5A is directed to the approximate center of the other axial end side 19b of the mixing and stirring unit 19. Yes.

  The cylindrical portion 22 is connected to an air supply line 26 that guides the air 4 from an air supply portion (not shown) as a working gas supply portion.

  Thereby, in the gas injection means 17, the air 4 supplied through the air supply line 26 from an air supply part is once received in the header 25, and after that, air is distributed to each injection port 18 from the header 25, and each injection port The air 4 can be injected from 18 as a jet.

  The mixing and stirring unit 19 is a cylindrical member that gradually decreases in diameter from one axial end 19a to the other axial end 19b. The axial direction one end side 19 a has the same diameter as the cylindrical portion 22 of the gas injection means 17, and is connected to the other end side of the cylindrical portion 22 in the axial direction.

  Thereby, the mixing stirring part 19 can distribute | circulate the jet of the air 4 injected from each injection port 18 of the gas injection means 17 from the axial direction one end side 19a to the axial direction other end side 19b.

  The dimension of the mixing and stirring unit 19 in the axial direction and the diameter of the axial center other end side 19b are such that the jet of the air 4 injected from each injection port 18 gradually expands to the axial direction other end side 19b. When reaching, the jet of the expanded air 4 is set so as to contact the inner surface of the other axial end side 19b.

  In this case, the method of setting the dimension in the axial direction of the mixing and stirring unit 19 and the diameter of the other end side 19b in the axial direction uses the same geometric calculation method and numerical model as shown in the first embodiment. Any of the method determined based on the result of the numerical analysis and the method determined based on the result of the test performed using the specimen may be used.

  Moreover, in this embodiment, what passes along the axial direction other end side 19b of the mixing stirring part 19 becomes a jet formed by the jets of the plurality of airs 4 injected from the plurality of injection ports 18 being merged. Therefore, the entire jet formed by joining the jets of the plurality of airs 4 may be in contact with the inner surface of the other axial end side 19b.

  A supply port 21 of the powder supply unit 20 is disposed at an axial center position on one end side 19 a in the axial direction of the mixing and stirring unit 19.

  A diffuser 15 similar to that of the first embodiment is connected to the other axial end 19 b of the mixing and stirring unit 19.

  When the dispersion nozzle 1A of the present embodiment having the above configuration is used, the other end in the axial direction of the diffuser 15 is formed on the wall of the gas flow path b for the exhaust gas a, similarly to the dispersion nozzle 1 of the first embodiment. The side outlet 16 is connected in communication. At this time, similarly to the first embodiment, the dispersion nozzle 1A of the present embodiment may be used in either a posture in which the outlet 16 faces sideways or a posture in which the outlet 16 faces downward.

  In this state, in the gas injection means 17, the air 4 supplied to the header 25 via the air supply line 26 from an air supply unit (not shown) is injected from each injection port 18 as a jet flow. Further, in the powder supply unit 20, the powder 7 that is pneumatically transported from a powder supply device (not shown) through the powder transport line 13 together with the carrier gas 12 is supplied from the supply port 21 to the axial direction of the mixing and stirring unit 19. Supply to one end side 19a.

  As a result, in the mixing and stirring unit 19, a plurality of jets of the air 4 injected from the respective injection ports 18 circulate from the axial direction one end side 19 a to the axial direction other end side 19 b and the powder supply unit 20. From the supply port 21, the carrier gas 12 and the powder 7 are supplied to the axial center position on the one axial end side 19a.

  Under the present circumstances, the flow attracted by each jet flow arises around the jet flow of the several air 4 which is injected from each injection port 18 and distribute | circulates the mixing stirring part 19. FIG. Accordingly, the powder 7 and the carrier gas 12 supplied from the supply port 21 are drawn into each jet.

  Thus, when the powder 7 is drawn into a plurality of jets of air 4, the powder 7 is agitated by each jet. For this reason, even if the powder 7 is partially agglomerated when it is pneumatically transported by the powder transportation line 13, the agglomerate of the powder 7 is released from the agglomeration.

  Furthermore, the mixing and stirring unit 19 is configured such that the jet of air 4 injected from each injection port 18 is in contact with the inner surface of the other axial end 19b, so that the powder 7 is not drawn into the jet of air 4. It is prevented from passing through the mixing and stirring unit 19 in the state.

  Therefore, from the axial direction other end side 19b of the mixing and stirring unit 19, the powder 7 in a state of being stirred and having improved dispersibility is discharged together with the jet of air 4.

  After the pressure of the jet of the air 4 including the powder 7 discharged from the other axial end 19 b of the mixing and stirring unit 19 is adjusted by passing through the diffuser 15, the gas flow path b passes through the outlet 16. Supplied to. The function of the diffuser 15 is the same as that of the first embodiment.

  Therefore, according to the dispersion nozzle 1A of the present embodiment, the same effect as that of the first embodiment can be obtained.

  In addition, this invention is not limited only to each said embodiment and modification, The dimension of each member shown to each figure, and the dimensional ratio of members are for the sake of convenience for illustration, It does not reflect actual dimensions.

  As the gas injected from the gas injection means 2 and 17, nitrogen gas, inert gas, or other gas other than air 4 is used according to the properties of the gas flowing through the gas flow path b and the properties of the powder used. You may do it. Further, the carrier gas 12 used for pneumatically transporting the powder 7 is nitrogen gas, inert gas, or other than air, depending on the properties of the gas flowing through the gas flow path b and the properties of the powder to be used. The gas may be used.

  The gas flow path b in which the dispersion nozzles 1 and 1A are installed may be a flow path for a gas other than the exhaust gas a as long as the gas desired to be distributed and supplied is circulated.

  In the second embodiment, the number of the injection ports 18 provided in the injection port forming member 24 may be 2 or 3, or 5 or more.

  The above-described pressure range in which the static pressure of the jet of air 4 at the time when it reaches the other axial end 5b, 19b of the mixing and stirring sections 5, 19 is desired as the static pressure of the jet of air 4 immediately before the outlet 16 is obtained. However, the diffuser 15 may be omitted. In this case, a configuration may be adopted in which the other axial ends 5b and 19b of the mixing and agitating units 5 and 19 are connected to the gas flow path b as outlets of the dispersion nozzles 1 and 1A.

  Of course, the dispersion nozzles 1, 1 </ b> A may be used in any angle orientation other than that shown in FIG. 3. Furthermore, it is needless to say that the dispersion nozzles 1, 1 </ b> A may be installed with an arbitrary angular posture other than the posture along the direction orthogonal to the extending direction of the gas flow channel b with respect to the gas flow channel b.

  Although the object to be dispersed and supplied to the gas flow path b by the dispersion nozzles 1 and 1A has been described as the powder 7, the particles to be dispersed and supplied are particles that can be transported by a carrier gas (so-called pneumatic transportation). A granule or a granular material may be sufficient.

  In addition, it goes without saying that various modifications can be made without departing from the scope of the present invention.

2 Gas injection means 3 Injection port 4 Air (working gas)
5 Mixing and stirring section 6 Powder supply section (particle supply section)
7 Powder (Particles to be supplied)
12 Carrier gas 15 Diffuser a Exhaust gas b Gas flow path

Claims (3)

Gas injection means having a working gas injection port;
A cylindrical mixing and stirring unit that is disposed on the injection port side of the gas injection unit and that allows a working gas jet injected from the injection port to flow from one end side in the axial direction to flow to the other end side in the axial direction When,
A particle supply unit that supplies supply target particles transported by a carrier gas to one end side in the axial direction of the mixing and stirring unit;
The diameter of the injection port, the diameter on the other end side in the axial direction of the mixing and stirring unit, and the distance from the injection port to the other end side in the axial direction of the mixing and stirring unit are injected from the injection port and A dispersion nozzle, characterized in that a jet of a working gas that progresses while expanding the inside of the mixing and stirring unit is in contact with an inner surface on the other axial end side of the mixing and stirring unit. A diffuser is provided on the other axial end side of the mixing and stirring unit,
The dispersion nozzle according to claim 1, wherein an outlet of the diffuser is connected to a gas flow path. The dispersion nozzle according to claim 1, wherein the supply target particles are powders of a medicine supplied by being dispersed in exhaust gas.

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