JP3810560B2 - Fluid mixing and dispensing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a device for mixing and distributing a mixed fluid of steam and water flowing out from a number of pipes in a boiler, a refrigerant mixing / distributing device in a refrigerator or an air conditioner that handles a gas-liquid mixed fluid of a refrigerant, or a chemical process It is related with the apparatus which mixes and distributes the fluid suitable for using in the heat exchanger etc. which handle the various gas-liquid two-phase fluids and fluids with different density | concentration etc.
[0002]
[Prior art]
FIG. 3 is a perspective view of a two-phase fluid mixing / distributing device conventionally used for mixing / distributing a gas-liquid two-phase fluid of water vapor and water in a boiler. This gas-liquid two-phase fluid mixing / distributing device mixes a gas-liquid two-phase fluid (mixed fluid of gas and liquid) of water vapor and water flowing in from a number of inflow pipes 6 in a boiler in a header 30, Used to distribute to the outflow pipe 7.
[0003]
The gas-liquid two-phase fluid flowing into the header 30 has a different flow rate and ratio of gas to liquid for each inflow pipe 6, or a gas or liquid flows in from a part of the inflow pipe 6 alone. Those temperatures are different from the gas-liquid two-phase fluid flowing in from the other inflow pipes 6.
[0004]
In the conventional gas-liquid two-phase fluid distributor shown in FIG. 3 , the fluid (gas-liquid two-phase fluid, gas, or liquid alone) that has flowed into the header 30 from a certain inflow pipe 6 has flowed from another inflow pipe 6 that is in close proximity. Although it mixes to some extent with the fluid, it flows out from the outflow pipe 7 near the inflow pipe 6 that flows in without mixing with the inflow fluid from the inflow pipe 6 that is far away in the axial direction of the header 30.
[0005]
Therefore, since the entire inflow fluid is not completely mixed in the header 30, the mixing is insufficient, and the gas-liquid two-phase fluid flowing out to the outflow pipe 7 is different in flow rate and gas / liquid ratio. As a result, there was a drawback that it could not be distributed evenly.
[0006]
[Problems to be solved by the invention]
The present invention is uniform except for the disadvantages of the fluid mixing and distribution device configured to mix the fluids from a large number of inflow pipes and then distribute and distribute them to a plurality of distribution pipes as described in the prior art in the previous section. It is an object of the present invention to provide a fluid mixing / distributing device that can evenly distribute and flow mixed fluid.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides an assembly line header in which an axis is placed horizontally and fluid flows in from a large number of inflow pipes, and an axis line in which fluid from the collective header flows in via a connection pipe and mixes one end is placed vertically is closed cylindrical mixer, a plurality of distribution pipes that evenly distributes the fluid mixed in the mixer is connected to the same height in the mixer, the fluid from the dispensing tube the distribution pipe and the same number of cylindrical distributor axis is closed at one end is placed vertically for receiving respectively, have a large number of outflow tube connected to the same height in each of the distributor, said fluid A gas-liquid two-phase fluid, an inlet of the gas-liquid two-phase fluid to the mixer and the distributor is on an axis, and an outlet from the mixer and the distributor is respectively connected to the inlet fluid mixing, characterized in that at the same height with the same distance Providing a dispensing device.
[0008]
As described above, in the fluid mixing / distributing device according to the present invention, the fluid from a large number of inflow pipes collected in the collecting header with the axis placed horizontally is a cylindrical mixer with the axis placed vertically and one end closed. And then mixed uniformly, and then evenly mixed in a plurality of distribution pipes connected to the mixer at the same height.
[0009]
The fluid flowing out from the mixer through each distribution pipe is placed in a cylindrical distributor whose axis is vertically placed and closed at one end , and then is connected to a plurality of outlet pipes connected at the same height. Evenly distributed. Thus, complete mixing and equal distribution can be achieved by performing the mixing and distribution separately.
[0010]
It provided an inlet of the gas-liquid two-phase fluid on the respective axis for the previous SL mixer and distributor, and the same height as well as equidistant to the outlet from the distributor these mixers to the inlet since you have a in the construction of the gas-liquid two-phase fluid after being homogeneously mixed in from the axial line inlet to the mixer, the effluent from the outlet at the same height of the mixer to the dispensing tube Therefore, the gas-liquid two-phase fluid in a well-mixed state from any of the outlets is taken out to the distribution pipe.
[0011]
Since the gas-liquid two-phase fluid in the distribution pipe enters the distributor from the axial inlet, and then is distributed from the outlet at the same height to a number of outlet pipes, the gas-liquid two-phase fluid is distributed to each outlet pipe. It can flow evenly.
[0012]
The provision of a fluid mixing and dispensing apparatus according to the present onset bright described above in the middle of the boiler furnace evaporation tube, it is possible to flow the gas-liquid two-phase fluid consisting of water and steam evenly into each evaporation pipe, the heat of evaporation pipes It is possible to provide a boiler that is free from deformation due to differential elongation.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a fluid mixing and distributing apparatus according to the present invention will be described in detail based on illustrated embodiments. Each of the following embodiments is applied to mixing and distribution of a gas-liquid two-phase fluid.
[0014]
(First embodiment)
First, the fluid mixing and distributing apparatus according to the first embodiment shown in FIG. 1 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 the central portion of the collecting header 1 via a connecting pipe 2. As the mixer 3, a known mixing device such as those disclosed in Japanese Patent Publication No. 6-12165 and Japanese Patent Publication No. 6-41798 may be used as appropriate.
[0015]
The cylindrical surface of the mixer 3, the distributor pipe at the same height 4 are a plurality of connections, the other end of the distribution pipes 4 are connected to the distributor 5, respectively. Distributor 5 is in a cylindrical container axis is closed at one end is placed vertically in the same shape as the mixer 3, to its cylindrical surface, a number of outlet pipe 7 is connected for the same height .
[0016]
The fluid mixing / distributing device according to the first embodiment shown in FIG. 1 has the above-described configuration, and the gas-liquid two-phase fluid flowing into the collecting header 1 from the inflow pipe 6 passes through the connecting pipe 2 to the mixer 3. Are mixed together in the mixer 3 and distributed evenly to the distribution pipe 4.
[0017]
In the mixer 3, the gas is separated upward and the liquid is separated downward due to the difference in gas-liquid density, thereby forming a liquid surface. Since all the outlets of the mixer 3 to which the distribution pipes 4 are connected are at the same height, the liquid level is formed at the level of the outlet, and both gas and liquid flow out equally to all the outlets. If there is a difference in height at the outlet, only gas will flow out from the upper outlet and only liquid will flow out from the lower outlet.
[0018]
Since the mixer 3 is axisymmetric, the gas-liquid two-phase fluid that flows into the mixer 3 from the connecting pipe 2 spreads radially to all outlets at equal distances. Distributed to. 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, but if the number of outflow pipes 7 is more than a certain number, the mixer The diameter of 3 becomes unrealistically large and is not practical.
[0019]
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 the plurality of distributors 5 connected to the respective distribution pipes 4, and A small number of distribution pipes 4 are connected to the distributor 5.
[0020]
The distributor 5 has the same shape and structure as the mixer 3, and the outflow pipe 7 is connected to the same height of the cylindrical surface of the distributor 5, so that the distribution from the mixer 3 to the distribution pipe 4 Likewise, gas-liquid two-phase fluid also to all of the outflow pipe 7 in the distributor 5 is Ru are evenly distributed.
[0021]
( Second Embodiment)
Next, the second embodiment shown in FIG. 2 will be described. This 2nd Embodiment is the example which installed the fluid mixing and distribution apparatus by 1st Embodiment in the middle of the furnace evaporation pipe of a boiler. In FIG. 2 , reference numeral 22 denotes an evaporation tube. The boiler forms a furnace 25 with four walls surrounded by a plurality of evaporation tubes 22 to form a furnace 25, and fuel and air supplied to a burner 26 installed on the wall surface form a flame 27 in the furnace 25. Burn.
[0022]
A number of the evaporation pipes 22 are connected to the inlet header 21, and water is supplied to the inlet header 21 from the outside, and the water is distributed to the plurality of evaporation pipes 22 by the inlet header 21, so that the evaporation pipe 22 is provided. While elevating the interior, it receives heat from the flame 27 and evaporates to become steam, which is 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), and the temperature further rises.
[0023]
The combustion gas flows as shown by the arrows in the figure, and the steam is heated by the 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 evaporation pipes 22 in every operation state of the boiler is not uniform in all the evaporation pipes 22. Difference in the outlet steam temperature. If the steam temperature is different, the temperature of each evaporation pipe 22 is also different. Since the furnace wall is configured by joining the evaporation pipes 22, a difference in thermal expansion occurs in the evaporation pipes 22 due to high and low temperatures, and if the temperature difference is excessive, the furnace wall may be deformed.
[0024]
Therefore, in the second embodiment, the vapor-liquid two-phase fluid mixing and distribution device according to the first embodiment shown in FIG. 1 is installed in the middle of the evaporation pipe 22, and the vapor temperature of each evaporation pipe 22 varies to some extent. In this stage, the temperature is once mixed to make the temperature uniform, and the temperature is evenly distributed to the respective evaporation pipes 22 so as to reduce the difference in the outlet steam temperature. As a result, the gas-liquid two-phase fluid flowing through the evaporation pipe 22 on the furnace wall is sufficiently mixed and then distributed evenly, so that there is no possibility that the furnace wall is deformed due to a temperature difference.
[0025]
The present invention has been specifically described above based on the illustrated embodiments. However, the present invention is not limited to these embodiments, and the specific structure and configuration are within the scope of the present invention shown in the claims. Needless to say, various changes may be made.
[0026]
【The invention's effect】
As described above, according to the present invention, the axial line is placed horizontally, the collecting header that allows fluid to flow in from a number of inflow pipes, and the axial line that mixes the fluid from the collecting header by flowing the fluid from the collecting header through the connecting pipe is vertical. cylindrical mixers placed one end closed, a plurality of distribution pipes that evenly distributes the fluid mixed in the mixer is connected to the same height in the mixer, the fluid from the dispensing tube respectively the distribution pipe of the same number of cylindrical distributor axis is closed at one end is placed vertically, have a large number of outflow tube connected to the same height in each of the distributor, said fluid liquid to accept Two-phase fluid, the gas-liquid two-phase fluid inlet to the mixer and distributor is on the axis, and the outlets from the mixer and distributor are equidistant from the inlet, respectively to provide a fluid mixing and dispensing apparatus which is in the same height with in
[0027]
In the fluid mixing / distributing device of the present invention configured as described above, a plurality of distribution pipes connected to the mixer at the same height after all of the fluid flowing through the multiple inflow pipes are collected and mixed in the mixer. Therefore, the fluid flows evenly through the distribution pipe. Therefore, unlike the conventional case, there is no situation where mixing is insufficient and the distributed fluid is not uniform.
[0028]
Further, in addition to the configuration described above, the fluid with axis provided distributor placed vertically to Ru allowed to flow into from the distribution pipe, and the structure of connecting the large number of outflow pipes to the distributable device at the same height cage, and the mixing of the fluid by the mixer, so to separate the distribution of fluid after mixing by distributable unit performed by separate devices, it is possible to evenly distribute the well mixed fluid.
[0029]
Furthermore, the gas-liquid two-phase fluid inlets to the mixer and distributor are axial, and the outlets from the mixer and distributor are equidistant from the inlet and the same height. With this configuration, the fluid mixing / distributing device is capable of performing complete mixing and equal distribution for the gas-liquid two-phase fluid.
[0030]
If this fluid mixing / distributing device of the present invention is provided in the middle of the furnace evaporator tube of the boiler, the gas-liquid two-phase fluid consisting of steam and water flowing through each evaporator tube can be made to be in an equal state. It is possible to provide a boiler that prevents thermal deformation and performs stable operation.
[0031]
As described above, according to the present invention, a fluid mixing / distributing device suitable for mixing and distributing gas-liquid two-phase fluids or fluids having different concentrations is provided.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of a fluid mixing and dispensing apparatus according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing a configuration of a fluid mixing and dispensing apparatus according to a second embodiment of the present invention.
FIG. 3 is a perspective view showing a configuration of a conventional fluid mixing and dispensing apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Collecting header 2 Connection pipe 3 Mixer 4 Distribution pipe 5 Divider 6 Inflow pipe 7 Outflow pipe 21 Inlet header 22 Evaporating pipe 23 Outlet header 24 Outlet header 25 Furnace 26 Burner 27 Flame 28 Superheater

Claims (2)

A cylindrical header whose axis is placed horizontally and fluid flows in from a number of inflow pipes, and where the fluid flowing from the inlet is mixed through the connecting pipe is vertically placed and closed at one end. mixers, a plurality of distribution pipes that evenly distributes the fluid mixed in the mixer is connected to the same height in the same mixer, said distribution pipe and the same number of axes for receiving each fluid from the dispensing tube vertical cylindrical distributor placed one end closed, have a large number of outflow tube connected to the same height in each of the distributor, wherein the fluid is a gas-liquid two-phase fluid, said mixer The inlet of the gas-liquid two-phase fluid to the distributor is on the axis, and the outlets from the mixer and the distributor are equidistant from the inlet and at the same height. A fluid mixing and dispensing device. A boiler comprising the fluid mixing / distributing device according to claim 1 in the middle of a furnace evaporation pipe of a boiler.

Images