JPH11351506A - Fluid mixing and distributing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a fluid mixing and distributing device which is constituted to make fluids from a plurality of inlet pipes to flow to a plurality of distribution pipes after mixing the fluid to evenly distribute the mixed fluid after the fluids are sufficiently mixed. SOLUTION: Gas-liquid two-phase fluids from many inlet pipes 6 are made to flow to a mixer 3 in the axial direction through a connecting pipe 2 after the fluids are collected to a concentrated pipe header 1. The mixed fluid from the mixer 3 is evenly distributed to many outlet pipes 7 after the fluid is collected to a distribution pipe header 15 through distribution pipes 4 connected to the mixer 3 at the same height.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mixing and distributing a mixed fluid of steam and water flowing out of a number of pipes in a boiler, and a method for mixing and dispersing a refrigerant in a refrigerator or an air conditioner which handles a refrigerant gas-liquid mixed fluid. The present invention relates to a distributing device or a device for mixing and distributing fluids suitable for use in a heat exchanger that handles various gas-liquid two-phase fluids and fluids having different concentrations in a chemical process.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view of a two-phase fluid mixing and distributing apparatus conventionally used for mixing and distributing a vapor-liquid two-phase fluid of steam and water in a boiler. This gas-liquid two-phase fluid mixing / distributing device is a gas-liquid two-phase fluid (mixed fluid of gas and liquid) of water vapor and water flowing from a number of inlet pipes 6 in a boiler.
Are mixed in the header 30 and distributed to a number of outlet pipes 7.

[0003] The gas-liquid two-phase fluid flowing into the header 30 differs in the flow rate and the ratio of gas to liquid for each of the inflow pipes 6, or gas or liquid alone flows in from some of the inflow pipes 6. Moreover, their temperatures may be different from those of the gas-liquid two-phase fluid flowing from the other inlet pipes 6.

In the conventional gas-liquid two-phase fluid distribution device shown in FIG.
The fluid (gas-liquid two-phase fluid or gas or liquid alone) flowing into the header 30 from a certain inflow pipe 6 mixes to a certain extent with the fluid flowing from another adjacent inflow pipe 6.
0, the outflow pipe 7 near the inflow pipe 6 that has flowed in without mixing with the inflow fluid from the inflow pipe 6 that is far away in the axial direction.
Spill out of.

Therefore, the entire inflow fluid is not completely mixed in the header 30. Therefore, the mixing is insufficient, and the gas-liquid two-phase fluid flowing out of the outflow pipe 7 has a different flow rate and a different ratio of gas to liquid. There was a drawback that they were different and could not be evenly distributed.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a fluid mixing system which is configured to mix fluids from a large number of inflow pipes and then distribute the fluids to a plurality of distribution pipes as described in the prior art. An object of the present invention is to provide a fluid mixing and distributing device that can uniformly distribute and flow a fluid in a uniformly mixed state, excluding the drawbacks of the distributing device.

[0007]

SUMMARY OF THE INVENTION (1) In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by collecting a fluid from a plurality of inflow pipes, and inflowing and mixing the fluid from the same. Provided is a fluid mixing and distributing apparatus having a mixer and a plurality of distribution pipes connected to the mixer and configured to flow a fluid mixed by the mixer.

As described above, in the fluid mixing and distributing apparatus according to the present invention, the fluid from the large number of inflow pipes collected in the collecting pipe is flowed to the mixer to be uniformly mixed, and then sufficiently supplied to the plurality of distribution pipes. Are uniformly flowed in a mixed state.

(2) In the fluid mixing and distributing apparatus according to the invention (1), the present invention provides a distribution pipe for flowing fluid from the plurality of distribution pipes and a number of fluids for flowing from the same distribution pipe. The outflow pipe is provided.

In the fluid mixing / distributing apparatus thus configured, the fluid flowing out of the mixer via the distribution pipe is collected in the distribution pipe, and distributed therefrom to a number of outflow pipes, so that the fluid is mixed by the mixer. The fluid can be evenly distributed from the distribution pipe to a larger number of outlet pipes.

(3) Still further, according to the present invention, in the fluid mixing and distributing apparatus according to the invention (1), a plurality of distributors each receiving fluid from the distribution pipe, and a plurality of distributors connected to the distributor. A configuration with an outflow pipe is adopted.

In the fluid mixing / distributing apparatus thus configured, the fluid flowing out of the mixer via each distribution pipe is introduced into the respective distributors and then equally distributed to a number of outflow pipes therefrom. Thus, by performing mixing and distribution separately, perfect mixing and uniform distribution are achieved.

(4) In the fluid mixing and distributing apparatus of the invention (3), when handling a gas-liquid two-phase fluid composed of steam and water, the mixer and the distributor are each axially symmetric and the axis is vertical. The inlets of the gas-liquid two-phase fluid for these mixers and distributors are provided on the respective axes, and the outlets from these mixers and distributors are equidistant from the inlets. In addition, it is preferable to adopt a configuration having the same height.

In the fluid mixing and distributing apparatus thus constructed, the gas-liquid two-phase fluid enters the mixer from the inlet on the axis, is uniformly mixed, and then flows at the same height in the mixer. Since the gas flows out from the outlet to the distribution pipe, the gas-liquid two-phase fluid in a well-mixed state is taken out from each of the outlets to the distribution pipe.

After the gas-liquid two-phase fluid in the distribution pipe enters the distributor from the inlet on the axis, it is distributed from the outlet at the same height to a number of outlet pipes. It can flow evenly to the outflow pipe.

When the above-described fluid mixing and distributing apparatus according to the present invention (1) to (4) is provided in the middle of a furnace evaporating tube of a boiler, a gas-liquid two-phase fluid composed of water and steam flows evenly through each evaporating tube. Thus, it is possible to provide a boiler that is free from deformation due to a difference in thermal expansion of the evaporator tube.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fluid mixing and distributing apparatus according to the present invention will be described in detail with reference to the illustrated embodiments. The following embodiments are all applied to the mixed distribution of a gas-liquid two-phase fluid.

(First Embodiment) First, the first embodiment shown in FIG.
A fluid mixing and distributing device according to an embodiment will be described. In FIG. 1, reference numeral 1 denotes a cylindrical collecting header whose axis is placed horizontally and both ends are closed, and a large number of inflow pipes 6 are connected to the collecting header 1. A cylindrical mixer 3 whose axis is placed vertically and whose one end is closed is connected to a central portion of the collecting header 1 via a connecting pipe 2. As the mixer 3,
A known mixing device such as that disclosed in JP-B-6-12165 or JP-B-6-41798 may be used as appropriate.

A plurality of distribution pipes 4 are connected to the cylindrical surface of the mixer 3 at the same height, and the other end of each distribution pipe 4 is connected to a distribution pipe shifter 15. The distribution pipe drawer 15 is, like the collecting pipe drawer 1, a cylindrical shape whose axis is placed horizontally and both ends are closed, and the cylindrical surface has a large number of outflow pipes 7 at the same height.
Is connected.

The fluid mixing and distributing apparatus according to the first embodiment shown in FIG. 1 has the above configuration, and the gas-liquid two-phase fluid flowing from the inflow pipe 6 into the collecting pipe 1 is distributed to the outflow pipe 7. Before being mixed, they are all collected in the mixer 3 via the connecting pipe 2, where they are completely mixed. The mixed gas-liquid two-phase fluid is supplied to the mixer 3
From the distribution pipe 4.

In the mixer 3, the gas is separated upward by the difference in the density of the gas and liquid, and the liquid is separated downward to form a liquid surface. Since the outlets of the mixers 3 to which the distribution pipes 4 are connected are all at the same height, the liquid level is formed at the level of the outlets, and both gas and liquid flow out to all outlets evenly. If there is a height difference at the exit, only gas from the upper exit,
Only the liquid flows out from the lower outlet, so that an even distribution is not possible.

Since the mixer 3 is axisymmetric, the connecting pipe 2
The gas-liquid two-phase fluid that has flowed into the mixer 3 from the outlet is radially spread to all outlets at the same distance, so that all outlets have the same flow state and are evenly distributed. If the diameter of the mixer 3 is sufficiently large, all the outflow pipes 7 can be directly connected to the same height of the cylindrical surface of the mixer 3. The diameter of 3 becomes unrealistically large and is not practical.

Therefore, in this embodiment, the outflow pipe 7 is connected to the distribution pipe drawer 15, and is connected from the mixer 3 to the distribution pipe drawer 15 by a small number of distribution pipes 4. Distribution piping 1
5, the outflow pipe 7 is connected to the distribution pipe 1
5 are connected to the same height of the cylindrical surface, so that the gas-liquid two-phase fluid is distributed almost equally to all the outflow pipes 7.

(Second Embodiment) Next, the second embodiment shown in FIG.
A fluid mixing and distributing device according to an embodiment will be described. In the present embodiment, the same parts as those of the fluid mixing and distributing device of the first embodiment shown in FIG. 1 are denoted by the same reference numerals, and overlapping description will be omitted.

In FIG. 2, the collecting pipe header 1, the inflow pipe 6,
The configurations of the connection pipe 2 and the mixer 3 are the same as those in the first embodiment. A plurality of distribution pipes 4 are connected to the cylindrical surface of the mixer 3 at the same height as in the first embodiment, and the other ends of the distribution pipes 4 are respectively connected to distributors 5. Distributor 5
Is a cylindrical container having an axis similar to that of the mixer 3 placed vertically and having one end closed, and an outlet pipe 7 is connected to the cylindrical surface at the same height.

The fluid mixing and distributing apparatus according to the second embodiment shown in FIG. 2 has the above configuration, and the gas-liquid two-phase fluid flowing from the inflow pipe 6 to the collecting header 1 is the same as that of the first embodiment. As in the case, the mixture is completely mixed in the mixer 3 and is evenly distributed to the distribution pipe 4. In the present embodiment, in order to avoid an unrealistic increase in the diameter of the mixer 3, the outlet pipe 7 is connected to a plurality of distributors 5 connected to the respective distribution pipes 4,
A small number of distribution pipes 4 are connected from the mixer 3 to the distributor 5.

The distributor 5 has the same shape and structure as the mixer 3, and the outlet pipe 7 is connected to the same height of the cylindrical surface of the distributor 5. , The gas-liquid two-phase fluid is evenly distributed to all the outflow pipes 7 in the distributor 5 as well. In the apparatus of the first embodiment shown in FIG. 1, there is a difference in the distance from the connection position of the distribution pipe 4 to the distribution pipe shifter 15 to each of the outflow pipes 7. Although there may be differences, the apparatus of the second embodiment shown in FIG. 2 can be completely evenly distributed.

(Third Embodiment) Next, the third embodiment shown in FIG.
An embodiment will be described. The third embodiment is an example in which the fluid mixing and distributing device according to the second embodiment is installed in the middle of a furnace evaporator tube of a boiler. In FIG. 3, reference numeral 22 denotes an evaporating tube. The boiler forms a furnace 25 surrounding four circumferences with a wall configured by lining up a number of evaporating tubes 22, and the fuel and air supplied to a burner 26 installed on the wall are used for the furnace 2.
A flame 27 is formed in the tube 5 and burned.

A number of evaporation tubes 22 are connected to an inlet header 21. Water is supplied to the inlet header 21 from the outside, and the water is distributed to the plurality of evaporation tubes 22 at the inlet header 21. While ascending in the evaporating pipe 22, it receives heat from the flame 27 and evaporates, and is vaporized and collected in the outlet headers 23 and 24. The steam collected in the outlet headers 23 and 24 is supplied to the superheater 28 through a path (not shown) to further increase the temperature.

The combustion gas flows as shown by the arrows in the figure, and the steam is heated by a superheater 28 installed in the upper part of the furnace 25 and exits the furnace 25. Since the combustion state in the furnace 25 changes depending on the type of fuel and the load on the boiler, the heat received by the evaporator tubes 22 in all the operation states of the boiler is reduced by all the evaporator tubes 22.
However, the temperature of the outlet steam of each evaporating tube 22 is different. If the steam temperature is different, the temperature of each evaporator tube 22 is also different. Since the furnace wall is formed by joining the evaporating tubes 22, a difference in thermal expansion occurs in the evaporating tubes 22 depending on the level of the temperature. If the temperature difference is excessive, the furnace walls may be deformed.

Therefore, in the third embodiment, the evaporating pipe 2
The gas-liquid two-phase fluid mixing and distributing apparatus according to the second embodiment shown in FIG. 2 is installed in the middle of the step 2, and once the vapor temperatures of the evaporating pipes 22 have a certain degree of difference, they are once mixed to make the temperature uniform. In this case, the difference in the outlet steam temperature is reduced by uniformly distributing the gas to each of the evaporating tubes 22.
As a result, the gas-liquid two-phase fluid flowing through the evaporating tube 22 of the furnace wall is sufficiently mixed and evenly distributed, so that there is no possibility that the furnace wall is deformed due to a temperature difference.

As described above, the present invention has been specifically described based on the illustrated embodiments. However, the present invention is not limited to these embodiments, and specific structures within the scope of the present invention as set forth in the appended claims. Needless to say, various changes may be made to the configuration.

For example, in the third embodiment, the fluid mixing and distributing apparatus according to the second embodiment is employed, but the fluid mixing and distributing apparatus according to the first embodiment may be employed.

[0034]

As described above, according to the present invention, there are provided a collecting pipe for flowing a fluid from a plurality of inflow pipes, a mixer for flowing and mixing the fluid from the collecting pipe, and a connection to the mixer. And a fluid mixing and distributing apparatus having a plurality of distribution pipes.

In the fluid mixing and distributing apparatus of the present invention thus constructed, all the fluids flowing through the many inflow pipes are collected in the mixer, mixed and distributed, so that the fluid is evenly distributed through the distribution pipe. It is. Therefore, unlike the prior art, the situation where the mixing is insufficient and the distributed fluid lacks uniformity does not occur.

In addition, in addition to the above-described structure, there is provided a distribution pipe shifter and a distributor for inflowing a fluid from the distribution pipe, and a configuration in which a number of outflow pipes are connected to the distribution pipe shifter and the distributor. Mixing the fluid with the mixer,
Since the distribution of the fluid after mixing by the distributor and the distributor is separated and performed by separate devices, a sufficiently mixed fluid can be evenly distributed.

Furthermore, the mixer and the distributor are arranged axially symmetrically with the axis vertical, the inlet of the gas-liquid two-phase fluid to the mixer and the distributor is located on the axis, and In the configuration in which the outlets from the mixer and the distributor are equidistant from the inlet and are provided at the same height, perfect mixing and uniform distribution of the gas-liquid two-phase fluid are performed. A fluid mixing and distributing device that can be operated.

If these fluid mixing and distributing devices of the present invention are provided in the middle of the furnace evaporating tubes of the boiler, the gas-liquid two-phase fluid consisting of steam and water flowing through each evaporating tube can be made uniform, so that the evaporating tubes Thus, it is possible to provide a boiler that performs stable operation by preventing thermal deformation due to a temperature difference of the boiler.

As described above, according to the present invention, there is provided a fluid mixing and distributing apparatus suitable for mixing and distributing gas-liquid two-phase fluids and fluids having different concentrations.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a configuration of a fluid mixing and distributing apparatus according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a fluid mixing and distributing apparatus according to a second embodiment of the present invention.

FIG. 3 is a perspective view showing a configuration of a fluid mixing and distributing apparatus according to a third embodiment of the present invention.

FIG. 4 is a perspective view showing a configuration of a conventional fluid mixing and distributing apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Collecting header 2 Connecting pipe 3 Mixer 4 minute piping 5 Distributor 6 Inflow pipe 7 Outflow pipe 15 minute piping header 21 Inlet header 22 Evaporation pipe 23 Outlet header 24 Outlet header 25 Furnace 26 Burner 27 Flame 28 Superheater

Continuing from the front page (72) Inventor Kenjiro Yamamoto 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanshiju Heavy Industries, Ltd. (72) Inventor Tomomitsu Yokoyama 2-5-1 Marunouchi, Chiyoda-ku, Tokyo Sanshi Heavy Industries Inside the corporation

Claims (5)

[Claims] 1. A collecting pipe for flowing a fluid from a number of inflow pipes, a mixer for flowing and mixing the fluid from the collecting pipe, and a fluid connected to the mixing vessel and mixed by the mixing vessel. A fluid mixing and distributing device having a plurality of distribution pipes for distributing. 2. The fluid mixing and distributing apparatus according to claim 1, further comprising a distribution pipe inlet for receiving fluid from the plurality of distribution pipes, and a plurality of outlet pipes connected to the distribution pipe inlet. 3. The fluid mixing and distributing apparatus according to claim 1, further comprising a plurality of distributors each receiving the fluid from the distribution pipe, and a plurality of outlet pipes connected to the distributor. 4. The fluid is a gas-liquid two-phase fluid, wherein the mixer and the distributor are each disposed in an axially symmetrical shape with the axis vertical, and the gas-liquid two-phase fluid is supplied to the mixer and the distributor. 4. An inlet according to claim 3, wherein the inlets are axial and the outlets from the mixer and distributor are respectively equidistant and at the same height as the inlets.
A fluid mixing and dispensing device as described. 5. A boiler comprising the fluid mixing and distributing device according to claim 1 provided in the middle of a furnace evaporator tube of a boiler.