JP5685468B2 - Fluid atomizer - Google Patents

Description

  The present invention relates to a fluid atomization apparatus that receives a gas and a liquid and atomizes the liquid with the gas.

As an example of a fluid atomizing apparatus for atomizing a liquid, there is a two-fluid atomizing nozzle disclosed in Patent Document 1.
The two-fluid atomization nozzle disclosed in Patent Document 1 is composed of “a liquid supply device, a liquid film formation device, a gas supply device, an air flow swirler, and an outer cylinder. A rotationally symmetric inner peripheral wall surface extending to one circular opening, the airflow swirler is of a radial flow type, and the outer cylinder has a second circular opening concentrically with the first circular opening on a tip wall thereof. Is opened, and a part of the airflow passes through the airflow swirler and flows into the space surrounded by the inner peripheral wall surface of the liquid film forming device as a swirling flow, and flows out of the first circular opening. The channel and the other part of the airflow include a second flow path that ejects from an annular opening between the inner peripheral wall of the second circular opening and the outer peripheral wall of the first circular opening, and a liquid Is ejected from a liquid ejection hole communicating with a liquid reservoir disposed inside the liquid supply device, and is then formed on the inner peripheral wall surface of the liquid film forming device. A cylindrical liquid film is formed in the first circular opening, and the inner periphery is sandwiched by the airflow of the first flow path and the outer periphery is sandwiched by the airflow of the second flow path to be atomized to be atomized. "I tried to do it."

JP 2009-297589 A

  When the gas and liquid are introduced into the nozzle and the liquid is atomized like the two-fluid atomizing nozzle described in Patent Document 1, the gas introduction path and the liquid are introduced to introduce the gas into the nozzle. A liquid introduction path is provided. Then, a gas supply pipe and a liquid supply pipe for supplying gas and liquid from the outside are connected to the gas introduction path and the liquid introduction path. For this reason, the position of the tip of the gas supply pipe or the liquid supply pipe must be accurately matched to the connection part of the gas introduction path and the liquid introduction path on the two-fluid atomization nozzle side.

However, since the gas supply pipe and the liquid supply pipe are generally rigid bodies, it is difficult to accurately match the gas introduction path and the liquid introduction path on the two-fluid atomization nozzle side. This is especially true when the two-fluid atomizing nozzle is installed in a sealed space or a narrow place. For example, when a two-fluid atomizing nozzle is installed in a pipeline, the gas supply pipe and the liquid supply pipe need to penetrate the pipe. Since this penetration portion needs to have pressure resistance and airtightness, for example, welding is performed on the pipe penetration surface. The distance from this weld to the two-fluid atomization nozzle is usually short, and it can be said that there is almost no freedom of the gas supply pipe and the liquid supply pipe constrained by the weld. For this reason, it becomes very difficult to match the front ends of the gas supply pipe and the liquid supply pipe with the connection portions of the gas introduction path and the liquid introduction path on the two-fluid atomization nozzle side.
For this reason, either one of the liquid pipe and the gas pipe is given a degree of freedom, that is, the pipe is made to have a flexible structure. However, in the case of a flexible structure, for example, a bellows structure, the pressure loss becomes large and vibration is likely to occur. Therefore, it is necessary to take another countermeasure for preventing vibration.

  The present invention has been made in order to solve the problems of the conventional example, and can easily connect a gas pipe or a liquid pipe from the outside even when installed in a sealed space or a narrow place. The object is to obtain a fluid atomizer.

In the conventional two-fluid atomization nozzle, two pipes, that is, a liquid pipe and a gas pipe are directly connected to a nozzle that is a single rigid body. The nozzle is pre-installed with a gas channel and a liquid channel, and the position on the inlet side of each channel is also fixed. Therefore, the gas pipe and the liquid pipe must be accurately connected to the fixed position. It was a must.
Therefore, the inventor sets the nozzle portion and at least one of the gas pipe and the liquid pipe as non-bonded pipes so as to face each other through a space, and the relative position is determined when the nozzle part and the non-bonded pipes are further installed. By doing so, the freedom degree of the nozzle part and piping connected to it increased, and it thought that piping became easy.
The present invention is based on this idea, and specifically comprises the following configuration.

(1) The fluid atomization apparatus according to the present invention is arranged in a main flow pipe through which gas flows, and the liquid supplied to the gas supply unit and the liquid supplied to the liquid supply unit come into contact with each other to atomize the liquid. that the nozzle section, a liquid supply pipe for supplying the liquid to the liquid supply portion provided through the main pipe the nozzle unit, the gas supply unit provided through the main pipe the nozzle unit A gas supply pipe for supplying gas,
The upstream end side of the nozzle part is the gas supply part, and the gas supply pipe is arranged such that a discharge part for discharging gas is provided with a gap between the gas supply part and the gas supply pipe The discharge part is reduced in diameter, and the reduced discharge part is arranged in the gas supply part .

(2) In addition, a nozzle unit that is arranged in a main flow tube through which gas flows and in which the gas supplied to the gas supply unit and the liquid supplied to the liquid supply unit come into contact with each other to atomize the liquid, and the main flow tube A liquid supply pipe that feeds the liquid to the liquid supply part of the nozzle part, and a gas supply pipe that feeds the gas supply part of the nozzle part and penetrates the mainstream pipe Have
In the gas supply pipe, a discharge part for discharging gas is connected without providing a gap in the gas supply part,
The liquid supply pipe is characterized in that the tip of the liquid supply pipe is reduced in diameter and disposed at a receiving port of the liquid supply part via a gap .

(3) Further, in the above (1) or ( 2), the nozzle portion accommodates an inner cylinder to which a liquid is supplied by a liquid supply pipe, and the inner cylinder, and an upstream end thereof is a gas supply portion. It is characterized by being a double-pipe structure provided with an outer cylinder .

  The fluid atomization apparatus according to the present invention includes a nozzle unit in which the supplied gas and liquid come into contact with each other to atomize the liquid, a liquid supply pipe that supplies the liquid to the liquid supply unit of the nozzle unit, and the nozzle unit A gas supply pipe for supplying gas to the gas supply section, and at least one of the gas supply pipe or the liquid supply pipe is disposed so as to face the nozzle section with a gap therebetween. The pipe on the side of the supply pipe or the liquid pipe that is arranged with a gap is allowed to be displaced due to the gap, so there is no need for strict alignment during piping, and piping work It can be done easily.

It is explanatory drawing of the fluid atomization apparatus which concerns on one embodiment of this invention. It is explanatory drawing of the fluid atomization apparatus which concerns on other embodiment of this invention. It is explanatory drawing of the fluid atomization apparatus which concerns on other embodiment of this invention. It is explanatory drawing of the fluid atomization apparatus which concerns on other embodiment of this invention.

[Embodiment 1]
A fluid atomization apparatus 1 according to the present embodiment includes a double-pipe structure nozzle portion 7 having an inner cylinder 5 inside an outer cylinder 3, a liquid supply pipe 9 that supplies liquid to the inner cylinder 5, and an outer cylinder. 3 and a gas supply pipe 11 for supplying a gas.
This will be described in detail below.

<Nozzle part 7>
The nozzle portion 7 has a double tube structure of the outer cylinder 3 and the inner cylinder 5, and a predetermined gap is formed between the outer surface of the inner cylinder 5 and the inner surface of the outer cylinder 3. This gap becomes a ring-shaped channel 15 through which gas from the upstream side flows.
The inner cylinder 5 is provided with a liquid supply part 7a for supplying liquid to a supply port 17 formed on the inner wall of the inner cylinder 5, and the tip of the liquid supply pipe 9 is connected to the liquid supply part 7a.
The upstream end side of the outer cylinder 3, that is, the side on which the gas supply pipe 11 is arranged is a gas supply part 7b.
The nozzle unit 7 may be supported by taking a stay on the mainstream pipe 21 or the like.

<Liquid supply pipe 9>
The liquid supply pipe 9 is connected to the liquid supply unit 7a and supplies the liquid to the liquid supply unit 7a. The liquid supply pipe 9 may be fixed to the liquid supply unit 7a or may be detachably attached.

<Gas supply pipe 11>
The gas supply pipe 11 is arranged on the upstream side of the nozzle part 7 and supplies gas to the gas supply part 7b. The gas discharge section 19 in the gas supply pipe 11 is disposed so as to provide a gap 13 between the gas supply section 7 and the gas supply section 7b.
The discharge part 19 of the gas supply pipe 11 of the present embodiment has a reduced diameter, and the discharge part 19 having a smaller diameter than the outer cylinder 3 is relatively coaxial with the base end of the outer cylinder 3 which is the gas supply part 7b. Are arranged to be. By reducing the diameter of the discharge part 19, the gas discharged from the discharge part 19 becomes high speed and low pressure, and the gas supplied by the ejector effect that causes the fluid to be sucked from the surroundings and the fluid inside the nozzle part 7 Is effective to prevent leakage from the gap 13 to the mainstream pipe 21 side.

An example of a procedure for installing the fluid atomization apparatus 1 configured as described above will be described by taking as an example a case where the fluid atomization apparatus 1 is installed in the main flow pipe 21 through which gas flows.
The liquid supply pipe 9 and the gas supply pipe 11 are respectively installed in the main flow pipe 21 at predetermined positions. In this state, the nozzle unit 7 is installed. In the case of the fluid atomization apparatus 1 having the above configuration, the liquid supply unit 7a of the nozzle unit 7 is connected to the tip of the liquid supply pipe 9. At this time, the discharge portion 19 of the gas supply pipe 11 and the base end portion of the outer cylinder 3 which is the gas supply portion 7b of the nozzle portion 7 form a non-bonded flow path that opens at a position facing each other through the gap 13. Become. That is, the gas supply pipe 11 is a non-bonded pipe. The gap 13 allows a slight deviation in the arrangement of the discharge part 19 of the gas supply pipe 11 and the gas supply part 7b. Therefore, there is no need for strict alignment, and each component device, that is, the nozzle part 7, the gas supply pipe 11, and the liquid supply pipe 9 can be easily installed.
Thus, by installing each component device at a predetermined position, the relative position of the non-bonded flow path is determined, and the fluid atomization apparatus 1 is completed.
In this state, the liquid pipe 23 may be connected to the liquid supply pipe 9 and the gas pipe 25 may be connected to the gas supply pipe 11 outside the main flow pipe 21.

Next, the operation of the fluid atomizer 1 installed in the mainstream pipe 21 as described above will be described.
The liquid supplied from the liquid supply pipe 9 to the inner cylinder 5 through the liquid supply part 7a flows while forming a liquid film on the wall surface in the inner cylinder 5 as a tubular spray flow by the gas supplied from the upstream side. . A ring-shaped flow path 15 is also formed on the outer peripheral side of the inner cylinder 5, and gas also flows through the ring-shaped flow path 15. On the outlet side of the inner cylinder 5, the liquid film formed on the inner wall surface of the inner cylinder 5 is ejected while maintaining the liquid film state in the tube axis direction of the inner cylinder 5. The gas flow that has flowed through the inner cylinder 5 exists inside the liquid film, and the gas flow that has flowed through the ring-shaped flow path 15 exists outside the liquid film. That is, the liquid film is sandwiched between these gas flows, and the liquid film is atomized into fine droplets.

  As described above, in the fluid atomization apparatus 1 according to the present embodiment, the discharge portion 19 of the gas supply pipe 11 and the base end portion of the outer cylinder 3 that is the gas supply portion 7 b of the nozzle portion 7 are interposed via the gap 13. The gap 13 allows a slight deviation in the arrangement of the discharge part 19 of the gas supply pipe 11 and the gas supply part 7b, and does not require strict alignment. The nozzle part 7, the gas supply pipe 11, and the liquid supply pipe 9 can be easily installed.

[Embodiment 2]
The second embodiment will be described with reference to FIG. In FIG. 2, the same parts as those in FIG.
In the fluid atomization apparatus 31 of the present embodiment, the nozzle unit 7 has a double tube structure including the outer cylinder 3 and the inner cylinder 5 similar to those of the first embodiment, and the liquid supply unit 7a on the inner cylinder 5 side. The tip of the liquid supply pipe 9 is disposed at the receiving port 35 with a gap 37 therebetween.
In addition, the gas supply pipe 11 and the gas supply part 7b of the nozzle part 7 are connected without providing a gap. The gas supply pipe 11 may be fixed to the gas supply unit 7b or may be detachably attached.

In the fluid atomization apparatus 31 of the present embodiment, the liquid supply pipe 9 may be installed in the receiving port 35 of the liquid supply section 7a with the gap 37 provided, and strict alignment is required during piping. In addition, the nozzle part 7, the liquid supply pipe 9, and the gas supply pipe 11 can be easily installed.
In this case as well, it is possible to reduce the diameter of the tip of the liquid supply pipe 9 to provide an ejector effect.

[Embodiment 3]
The third embodiment will be described with reference to FIG. 3, the same parts as those in FIG. 2 are denoted by the same reference numerals.
In the fluid atomization apparatus 41 of the present embodiment, the nozzle portion 7 has a double tube structure including the outer cylinder 3 and the inner cylinder 5 similar to those of the first embodiment, and the gas supply pipe 11 and the gas supply section 7b. In the same manner as in the second embodiment, the distal end portion of the liquid supply pipe 9 is disposed through the gap 37 in the receiving port 35 of the liquid supply section 7a.

  In the fluid atomization apparatus according to the present embodiment, as described in the first and second embodiments, each component, that is, the nozzle unit 7, the gas supply pipe 11, and the liquid supply pipe 9 can be easily installed. .

[Embodiment 4]
The fourth embodiment will be described with reference to FIG. 4, the same parts as those in FIG. 1 are denoted by the same reference numerals.
In the fluid atomization apparatus 51 of the present embodiment, the nozzle portion 53 is not a double tube structure, but is constituted by a single tube 55, a liquid supply unit 53a is provided in the single tube 55, and the upstream end side of the single tube 55 is gasified. The supply unit 53b is used. And the gas supply pipe | tube 11 provides the gap | interval 13 between the gas discharge part 19 and the gas supply part 53b similarly to Embodiment 1, and is arrange | positioned.

  Also in the present embodiment, each component device, that is, the nozzle portion 53, the gas supply pipe 11, and the liquid supply pipe 9 can be easily installed as in the first embodiment.

DESCRIPTION OF SYMBOLS 1 Fluid atomization apparatus 3 Outer cylinder 5 Inner cylinder 7 Nozzle part 7a Liquid supply part 7b Gas supply part 9 Liquid supply pipe 11 Gas supply pipe 13 Gap | interval 15 Ring-shaped flow path 17 Supply port 19 Discharge part 21 Main flow pipe 23 Liquid piping 25 Gas pipe 31 Fluid atomizer 35 Receiving port 37 Gap 41 Fluid atomizer 51 Fluid atomizer 53 Nozzle part 53a Liquid supply part 53b Gas supply part 55 Single pipe

Claims (3)

A nozzle part that is arranged in a main flow pipe through which gas flows and that is supplied with the gas supplied to the gas supply part and the liquid supplied to the liquid supply part to atomize the liquid, and is provided to penetrate the main flow pipe It is a liquid supply tube for supplying liquid to the liquid supply portion of the nozzle portion, provided through the main tube and a gas supply pipe for supplying a gas to the gas supply portion of the nozzle portion,
The upstream end side of the nozzle part is the gas supply part, and the gas supply pipe is arranged such that a discharge part for discharging gas is provided with a gap between the gas supply part and the gas supply pipe The fluid atomizer is characterized in that the diameter of the discharge part is reduced, and the reduced diameter discharge part is arranged in the gas supply part . A nozzle part that is arranged in a main flow pipe through which gas flows and that is supplied with the gas supplied to the gas supply part and the liquid supplied to the liquid supply part to atomize the liquid, and is provided to penetrate the main flow pipe It is a liquid supply tube for supplying liquid to the liquid supply portion of the nozzle portion, provided through the main tube and a gas supply pipe for supplying a gas to the gas supply portion of the nozzle portion,
In the gas supply pipe, a discharge part for discharging gas is connected without providing a gap in the gas supply part,
The liquid atomizing device is characterized in that a diameter of a tip of the liquid supply pipe is reduced and disposed at a receiving port of the liquid supply part via a gap . The nozzle part has a double pipe structure including an inner cylinder to which liquid is supplied by a liquid supply pipe, and an outer cylinder that houses the inner cylinder and whose upstream end serves as a gas supply part. The fluid atomization apparatus according to claim 1 or 2.

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