JPH0448811Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is applicable to gas and liquid mixing devices, direct contact heat exchangers, heating devices, etc. used in geothermal plants, chemical plants, etc. This invention relates to improvements in liquid gas-liquid mixers.

[Conventional technology]

FIG. 2 is a sectional view showing a conventional gas-liquid mixer.

A conventional gas-liquid mixer includes a cylindrical inner cylinder 21, an outer cylinder 22 coaxially arranged outside the cylinder 21, a liquid inflow pipe 23 connected to one end of the inner cylinder, and an outer cylinder 22.
2, and a gas inflow pipe 24 connected to the gas inflow pipe 24. Both ends of the outer cylinder 22 are closed and fixed to the inner cylinder 21 in a fluid-tight manner, and an annular gas chamber 29 is formed between the inner cylinder 21 and the outer cylinder 22. The cylinder wall of the inner cylinder 21 has a large number of small holes 2 communicating with the gas chamber 29.
8 is punched.

In such a conventional gas-liquid mixer, gas flows into the gas chamber 29 from the gas inflow pipe 24 and enters the small hole 2.
8 into the inner cylinder 21 and the liquid inflow pipe 2
Inner cylinder 21 while mixing with the liquid flowing in from 3.
The inside flows out to the left in Figure 2.

[Problem that the invention attempts to solve]

The conventional gas-liquid mixer mixes gas and liquid by blowing gas into the liquid in the inner cylinder 21. Therefore, in order to blow gas into a liquid, the gas required a certain high pressure.

In addition, by mixing gas, the flow rate of the liquid after mixing becomes faster than before mixing, but the work of acceleration must be done by the gas, so the gas with lower density accelerates the liquid with higher density. As an energy source, gases required high pressure.

As described above, the conventional gas-liquid mixer requires a high gas pressure, so it has the disadvantage that it cannot be applied when the gas supply pressure is low.

[Means for solving problems]

The gas-liquid mixer of the present invention includes an outer cylinder through which gas flows, an inner cylinder inserted substantially coaxially toward the downstream side within the outer cylinder and through which liquid flows out into the outer cylinder, and a portion near the outlet of the inner cylinder. The inner tube includes a cone whose bottom surface faces outward, and means for moving the cone in the axial direction of the inner cylinder.

[Effect]

The liquid flowing inside the inner cylinder is accelerated by the pressure of the liquid itself due to the conical body disposed near the outlet of the inner cylinder, and is ejected into the gas flowing inside the outer cylinder.

Furthermore, since the liquid is accelerated and blown out while the gas is flowing, no energy is required for blowing the gas or accelerating the liquid, and the gas supply pressure can be low. Furthermore, if it is predicted that the flow rate of the liquid in the inner cylinder will change and it will be difficult to obtain a good mixing state, the cone can be moved in the axial direction of the cylinder to optimize the outflow according to the flow rate of the liquid. Since the width of the passage can be adjusted to match the speed, gas and liquid can be mixed over a wide range of liquid flow rates.

〔Example〕

FIG. 1 is a longitudinal sectional view showing an embodiment of a gas-liquid mixer according to the present invention.

One end of the outer cylinder 2 is closed, and the outlet 1 is formed by passing through the closed end and aligning the axis with the outer cylinder 2.
One end of the inner cylinder 1 having a shape a is inserted into the outer cylinder 2. The inner cylinder 1 and the outer cylinder 2 are fixed fluid-tightly. The outer projecting end of the inner cylinder 1 is closed, and a liquid inlet pipe 3 is attached perpendicularly to the cylinder 1. A gas inflow pipe 4 is fixed to the outer cylinder 2 in a fluid-tight manner.

The tip of the outlet 1a of the inner tube 1 inside the outer tube 2 is located in front of the position of the gas inflow pipe 4 (to the left in FIG. 1), and the tip of the outlet 1a of the inner tube 1 has a conical shape. A body 5 is arranged.

Further, a movable rod 8 is attached to the conical body 5 which is a resistance member, and the movable rod 8 is supported by a support body 6, so that the conical body 5 can move in the axial direction of the inner cylinder 1. The moving rod 8 protrudes from the closed end of the inner cylinder 1, and its movement amount is regulated by a nut 9 that is threaded into a threaded portion formed at the end of the moving rod 8.

In such a device, liquid flows into the inner cylinder 1 through the liquid inlet pipe 3, which is formed between the outlet 1a of the cylinder 1 and the cone 5, as indicated by the solid arrow in the figure. The liquid is discharged into the inner cylinder 2 through the liquid passage 7 along the conical surface of the conical body 5 in a conical shape.

On the other hand, gas flows into the outer cylinder 2 through the gas inflow pipe 4, flows between the outer cylinder 2 and the inner cylinder 1 as shown by the broken line arrow in the figure, and forms a conical shape at the tip of the outlet 1a of the inner cylinder 1. It mixes with the liquid discharged in the form of a liquid, and discharges the inside of the outer cylinder 2 in the left direction in FIG.

As described above, the conical body 5 as a resistance member is arranged at the outlet 1a of the inner cylinder 1, the liquid passage 7 is narrower than the cross-sectional area of the outlet 1a of the inner cylinder 1, and the liquid flows through the fluid passage. 7, the liquid is accelerated by its own pressure.

In addition, unlike conventional gas-liquid mixers, the gas is not blown into the liquid, but instead the liquid is accelerated and blown out during the gas flow. energy is not required and the gas supply pressure can be low.

Furthermore, since the blowing direction of the liquid is arranged to intersect with the flow direction of the gas, the gas and the liquid can be mixed well.

Furthermore, by turning the nut 9 and moving the moving rod 8 and fixing it at an appropriate position, the size of the passage 7 between the cone 5 and the inner cylinder 1 can be adjusted, so that the liquid flowing inside the inner cylinder 1 can be adjusted. The width of the passage 7 can be adjusted depending on the flow rate to achieve the optimum outflow speed, and therefore, according to this device, gas and liquid can be mixed over a wide range of liquid flow rates.

[Effect of idea]

According to the gas-liquid mixer of the present invention, gas and liquid can be mixed well over a wide liquid flow rate range, so it is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a gas-liquid mixer showing an embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view showing a conventional gas-liquid mixer. 1... Inner cylinder, 2... Outer cylinder, 5... Cone, 9...
…Natsuto (transportation means).

Claims (1)

[Scope of utility model registration request] An outer cylinder through which gas flows, an inner cylinder inserted substantially coaxially toward the downstream side within the outer cylinder and through which liquid flows into the outer cylinder, and arranged near the outlet of the inner cylinder with the bottom side facing outward. 1. A gas-liquid mixer comprising a conical body and means for moving the conical body in the axial direction of the inner cylinder.