Gas-liquid mixing booster device

Abstract

The gas-liquid mixing and boosting device comprises a compression pipe, the compression pipe comprises a contraction pipe section and a straight pipe section, one end of the contraction pipe section is a large end inlet, the other end is a small end outlet, the large end inlet of the contraction pipe section is connected to the air inlet chamber of the air inlet container, the small end outlet of the contraction pipe section is connected to one end of the straight pipe section, the other end of the straight pipe section is connected to the buffer chamber of the buffer container, the ratio of the length of the straight pipe section to the inner hole diameter of the straight pipe section is 1-3; the axial angle of the contraction pipe section is 8゜-26゜, the ratio of the diameter of the large end inlet of the contraction pipe section to the diameter of the small end outlet of the contraction pipe section is 2-6; a gradually contracting nozzle is arranged in the air inlet chamber, and the gradually contracting nozzle extends outward through the wall of the air inlet container. The purpose is to provide a gas-liquid mixing and boosting device that can efficiently and quickly mix gas and liquid and quickly increase the pressure of the gas-liquid mixed fluid by using steam to heat water in the fields of heating, chemical industry and papermaking, and the energy consumption of the entire cycle process is very low and the heat exchange efficiency is high.

Description

Technical Field

[0001] The invention relates to a gas-liquid mixing pressurizing device. Background Art

[0002] Gas-liquid mixing or dispersion is often required in production and life. For example, steam is used to heat water in thermal engineering, and then the hot water is used for heating. Gas-liquid mixing is used to maintain the reaction temperature in chemical and papermaking processes, and aeration and oxygenation are used in water treatment processes. The existing steam-heated water is heated by direct mixing of steam and water, and a water pump is required to drive the hot water circulation. The energy consumption of the entire circulation process is large and the heat exchange efficiency is low. The existing aeration equipment has insufficient dispersion, large bubbles, small specific surface area, and high energy consumption. Summary of the invention

[0003] The purpose of the present invention is to provide a gas-liquid mixing booster device which utilizes steam to heat water in the fields of heating, chemical industry and papermaking, can efficiently and quickly mix gas and liquid, and can quickly increase the pressure of the gas-liquid mixed fluid. The energy consumption of the entire cycle process is very low and the heat exchange efficiency is high.

[0004] The present invention is also a high-efficiency gas-liquid dispersion device, which can utilize the high-speed shearing effect of the fluid to mix the gas and liquid, and the small bubbles burst into smaller microbubbles when the pressure is released, thereby significantly improving the dissolved oxygen efficiency. It is used for sewage treatment and fish pond oxygenation, and can increase the oxygen content in the water with lower energy consumption.

[0005] The gas-liquid mixing pressurizing device of the present invention comprises a flow guide pipe, a compression pipe and an air intake chamber, wherein the compression pipe comprises a contraction pipe section and a straight pipe section, wherein one end of the contraction pipe section is a large end inlet and the other end is a small end outlet, wherein the large end inlet of the contraction pipe section is communicated with the air intake chamber in the air intake container, the small end outlet of the contraction pipe section is communicated with one end of the straight pipe section, and the other end of the straight pipe section is communicated with the buffer chamber of the buffer container, wherein the ratio of the length of the straight pipe section to the inner hole diameter of the straight pipe section is 1-3;

[0006] The axial angle of the contraction tube section is 8°-26°, and the ratio of the diameter of the inlet at the large end of the contraction tube section to the diameter of the outlet at the small end of the contraction tube section is 2-6;

[0007] The guide pipe includes a converging nozzle and a fluid delivery pipe, the large end of the converging nozzle is communicated with one end of the fluid delivery pipe, the converging nozzle is arranged in the air intake chamber, the converging nozzle or the fluid delivery pipe extends outward through the wall of the air intake container, the outlet section of the converging nozzle is inserted into the large end inlet of the converging pipe section, and an air intake gap is left between the outer side wall of the outlet section of the converging nozzle and the inner space of the converging pipe section;

[0008] The axial angle of the converging nozzle is 1°-8°, the ratio of the diameter of the large end inlet of the converging nozzle to the diameter of the small end outlet of the converging nozzle is 1.1-2; the aspect ratio of the converging nozzle is 1-1.5;

[0009] An air inlet pipe is arranged on the wall of the air inlet container, and a liquid outlet, an air outlet and a drain outlet are respectively arranged on the wall of the buffer chamber.

[0010] The gas-liquid mixing booster device of the present invention, wherein the ratio of the length of the straight pipe section to the inner hole diameter of the straight pipe section is 1.2-2.7, the axial angle of the contraction pipe section is 10°-23°, and the ratio of the diameter of the large end inlet of the contraction pipe section to the diameter of the small end outlet of the contraction pipe section is 2.5-5.5.

[0011] The gas-liquid mixing booster device of the present invention, wherein the ratio of the length of the straight pipe section to the inner hole diameter of the straight pipe section is 1.6-2.3, the axial angle of the contraction pipe section is 15°-20°, and the ratio of the diameter of the large end inlet of the contraction pipe section to the diameter of the small end outlet of the contraction pipe section is 3.5-4.5.

[0012] The gas-liquid mixing booster device of the present invention, wherein the ratio of the length of the straight pipe section to the inner hole diameter of the straight pipe section is 1.9-2.1, the axial angle of the contraction pipe section is 17°-19°, and the ratio of the diameter of the large end inlet of the contraction pipe section to the diameter of the small end outlet of the contraction pipe section is 3.8-4.2.

[0013] The gas-liquid mixing boosting device of the present invention, wherein the tapered nozzle is communicated with the outlet of the fluid pump through a liquid delivery pipe, and the air inlet pipe is communicated with the air outlet of the steam pipe or the air pump or the air compressor through an air delivery pipe.

[0014] When the gas-liquid mixing boosting device of the present invention is used, the liquid fluid can be sprayed at high speed into the large end inlet of the contraction section of the compression tube through the converging nozzle, and at the same time, pressurized steam or dispersed gas can be delivered to the air inlet chamber. Since there is an air inlet gap between the converging nozzle and the compression tube, the steam in the air inlet chamber will enter the contraction section of the compression tube from the air inlet gap, and the steam and liquid fluids in the compression tube are fully mixed and absorbed by the interlaminar shear force of the fluid. When the fluid flow rate reaches the critical flow rate, that is, the speed of sound, at a certain section of the compression tube, a congestion state is formed, which will convert the kinetic energy of the fluid into pressure energy in the buffer chamber, and increase the pressure of the liquid in the buffer chamber, and the high-pressure fluid can be delivered out through the liquid outlet. Therefore, the gas-liquid mixing boosting device of the present invention can be used for heating, chemical industry, and heat exchange of steam heating water in papermaking processes. It has the characteristics of being able to efficiently and quickly mix gas and liquid, and can quickly increase the pressure of the gas-liquid mixed fluid. The energy consumption of the entire cycle process is very low, and the heat exchange efficiency is high. At the same time, the present invention is also a high-efficiency gas-liquid dispersion equipment, which uses the high-speed shearing effect of the fluid to mix the gas and liquid, and the small bubbles burst into smaller microbubbles when the pressure is released, thereby significantly improving the dissolved oxygen efficiency. It is used for sewage treatment and fish pond oxygenation, which can increase the oxygen content in the water with lower energy consumption.

[0015] The gas-liquid mixing pressurizing device of the present invention will be further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional view of the structural schematic diagram of the gas-liquid mixing boosting device of the present invention. DETAILED DESCRIPTION

[0017] like Figure 1 As shown, the gas-liquid mixing boosting device of the present invention comprises a flow guide pipe, a compression pipe and an air inlet chamber 4, the compression pipe comprises a contraction pipe section 1 and a straight pipe section 2, one end of the contraction pipe section 1 is a large end inlet, and the other end is a small end outlet, the large end inlet of the contraction pipe section 1 is communicated with the air inlet chamber 4 in the air inlet container 3, the small end outlet of the contraction pipe section 1 is communicated with one end of the straight pipe section 2, the other end of the straight pipe section 2 is communicated with the buffer chamber 6 of the buffer container 5, and the ratio of the length of the straight pipe section 2 to the inner hole diameter of the straight pipe section is 1-3;

[0018] The axial angle of the contraction tube section 1 is 8°-26°, and the ratio of the diameter of the inlet at the large end of the contraction tube section 1 to the diameter of the outlet at the small end of the contraction tube section 1 is 2-6;

[0019] The guide pipe includes a converging nozzle 7 and a fluid delivery pipe 14. The large end of the converging nozzle 7 is communicated with one end of the fluid delivery pipe 14. The converging nozzle 7 is arranged in the air intake chamber 4. The converging nozzle 7 or the fluid delivery pipe 14 extends outward through the wall of the air intake container 3. The outlet section of the converging nozzle 7 is inserted into the large end inlet of the converging pipe section 1. An air intake gap 8 is left between the outer wall of the outlet section of the converging nozzle 7 and the inner space of the converging pipe section 1.

[0020] The axial angle of the converging nozzle 7 is 1°-8°, the ratio of the diameter of the large end inlet of the converging nozzle 7 to the diameter of the small end outlet of the converging nozzle 7 is 1.1-2; the aspect ratio of the converging nozzle 7 is 1-1.5;

[0021] An air inlet pipe 10 is provided on the wall of the air inlet container 3, and a liquid outlet 11, an air outlet 12 and a drain outlet 13 are respectively provided on the wall of the buffer chamber 6.

[0022] As a further improvement of the present invention, the ratio of the length of the straight pipe section 2 to the inner hole diameter of the straight pipe section is 1.2-2.7, the axial angle of the contraction pipe section 1 is 10°-23°, and the ratio of the diameter of the large end inlet of the contraction pipe section 1 to the diameter of the small end outlet of the contraction pipe section 1 is 2.5-5.5.

[0023] As a further improvement of the present invention, the ratio of the length of the straight pipe section 2 to the inner hole diameter of the straight pipe section is 1.6-2.3, the axial angle of the contraction pipe section 1 is 15°-20°, and the ratio of the diameter of the large end inlet of the contraction pipe section 1 to the diameter of the small end outlet of the contraction pipe section 1 is 3.5-4.5.

[0024] As a further improvement of the present invention, the ratio of the length of the straight pipe section 2 to the inner hole diameter of the straight pipe section is 1.9-2.1, the axial angle of the contraction pipe section 1 is 17°-19°, and the ratio of the diameter of the large end inlet of the contraction pipe section 1 to the diameter of the small end outlet of the contraction pipe section 1 is 3.8-4.2.

[0025] As a further improvement of the present invention, the above-mentioned tapered nozzle 7 is communicated with the outlet of the fluid pump through a liquid delivery pipe, and the air inlet pipe 10 is communicated with the air outlet of the steam pipe or the air pump or the air compressor through an air delivery pipe.

[0026] When the gas-liquid mixing boosting device of the present invention is used, the liquid fluid can be sprayed at high speed into the large end inlet of the contraction section 1 of the compression tube through the converging nozzle 7, and at the same time, pressurized steam or pressurized air can be delivered to the air inlet chamber 4. Since there is an air inlet gap 8 between the converging nozzle 7 and the compression tube, the steam or pressurized air in the air inlet chamber 4 will enter the contraction section 1 of the compression tube from the air inlet gap 8, and the steam and liquid fluids in the compression tube are fully mixed and absorbed by the interlaminar shear force of the fluid. When the fluid flow rate reaches the critical flow rate, that is, the speed of sound, at a certain section of the compression tube, a congestion state is formed, and the kinetic energy of the fluid is converted into pressure energy in the buffer chamber 6, and the pressure of the liquid in the buffer chamber 6 is increased, and the high-pressure fluid can be delivered out through the liquid outlet 11. Therefore, the gas-liquid mixing boosting device of the present invention can be used for heating, chemical industry, and heat exchange of steam heating water in papermaking processes, and has the characteristics of being able to efficiently and quickly mix gas and liquid, and can quickly increase the pressure of the gas-liquid mixed fluid, and the entire cycle process has very low energy consumption and high heat exchange efficiency.

[0027] At the same time, the present invention is also a high-efficiency gas-liquid dispersion equipment, which uses the high-speed shearing effect of the fluid to mix the gas and liquid, and the small bubbles burst into smaller microbubbles when the pressure is released, thereby significantly improving the dissolved oxygen efficiency. It is used for sewage treatment and fish pond oxygenation, which can increase the oxygen content in the water with lower energy consumption.

[0028] A nozzle is a device that accelerates a fluid by changing the geometry of the inner wall of a pipe section. There are two common types of nozzles: one is a convergent nozzle and the other is a convergent nozzle, or Laval nozzle.

[0029] The effect of nozzle cross section change on flow velocity is as follows:

[0030] From the continuity equation:

[0031]

[0032] From the momentum equation:

[0033]

[0034] Combining the two equations, we get:

[0035]

[0036] Where: ρ is fluid density, V is fluid volume, A is cross-sectional area, and M is Mach number.

[0037] When the compressible fluid (hereinafter referred to as fluid) is in the critical and supercritical state, the fluid Mach number on the nozzle outlet section is equal to 1, the outlet section is the critical section, and the mass flow rate through the nozzle reaches the maximum value. Since the outlet section is the speed of sound, when the back pressure is further reduced, the fluid Mach number on the outlet section cannot continue to increase, nor can the nozzle mass flow rate continue to increase. Therefore, the flow rate reaches the maximum value, and the flow state of M=1 is a congestion state. Once the nozzle is in a congested state, the external back pressure at the nozzle outlet can no longer affect the flow in the nozzle. Moreover, whether it is changing the external back pressure at the outlet or changing the total pressure and total temperature of the inlet fluid, the dimensionless parameters on any section of the nozzle cannot change.

[0038] The present invention designs a gas-liquid mixing booster device by using the above principle, see Figure 1 When the driving fluid in the converging nozzle 7 is liquid, the liquid is ejected into the contraction tube at high speed through the converging nozzle 7. There is an air intake gap 8 between the converging nozzle 7 and the compression tube. Steam enters the compression tube from the air intake gap 8. In the compression tube, the steam and liquid are fully mixed and absorbed by the interlaminar shear force of the fluid. When the fluid flow rate reaches the speed of sound (critical flow rate) at a certain section of the compression tube, a congestion state is formed, and the kinetic energy of the fluid in the buffer chamber 6 is converted into static pressure.

[0039] The embodiments described above are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineers and technicians in the field should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. Gas-liquid mixing booster device, characterized in that: The invention comprises a flow guide pipe, a compression pipe and an air intake chamber (4), wherein the compression pipe comprises a contraction pipe section (1) and a straight pipe section (2), wherein one end of the contraction pipe section (1) is a large end inlet and the other end is a small end outlet, wherein the large end inlet of the contraction pipe section (1) is connected to the air intake chamber (4) in the air intake container (3), the small end outlet of the contraction pipe section (1) is connected to one end of the straight pipe section (2), and the other end of the straight pipe section (2) is connected to the buffer chamber (6) of the buffer container (5), and the ratio of the length of the straight pipe section (2) to the inner hole diameter of the straight pipe section is 1-3; The axial angle of the contraction pipe section (1) is 10°-23°, and the ratio of the diameter of the inlet at the large end of the contraction pipe section (1) to the diameter of the outlet at the small end of the contraction pipe section (1) is 2-6; The flow guide pipe comprises a gradually converging nozzle (7) and a fluid delivery pipe (14), the large end of the gradually converging nozzle (7) is communicated with one end of the fluid delivery pipe (14), the gradually converging nozzle (7) is arranged in the air intake chamber (4), the gradually converging nozzle (7) or the fluid delivery pipe (14) extends outward through the wall of the air intake container (3), the outlet section of the gradually converging nozzle (7) is inserted into the large end inlet of the convergent pipe section (1), and an air intake gap (8) is left between the outer wall of the outlet section of the gradually converging nozzle (7) and the inner space of the convergent pipe section (1); The axial angle of the converging nozzle (7) is 1°-8°, the ratio of the diameter of the large end inlet of the converging nozzle (7) to the diameter of the small end outlet of the converging nozzle (7) is 1.1-2; the aspect ratio of the converging nozzle (7) is 1-1.5; An air intake pipe (10) is provided on the wall of the air intake container (3), and a liquid outlet (11), an air outlet (12) and a drain outlet (13) are respectively provided on the wall of the buffer chamber (6); The liquid fluid is sprayed at high speed into the large end inlet of the contraction section (1) of the compression tube through the converging nozzle (7), and at the same time, pressurized steam or pressurized air is delivered to the air inlet chamber (4). Since there is an air inlet gap (8) between the converging nozzle (7) and the compression tube, the steam or pressurized air in the air inlet chamber (4) enters the contraction section (1) of the compression tube through the air inlet gap (8). The steam and liquid fluids in the compression tube are fully mixed and absorbed by the interlaminar shear force of the fluids, so that the fluid flow rate reaches the critical flow rate, i.e., the speed of sound, at a certain section of the compression tube, forming a congestion state, so that the kinetic energy of the fluid is converted into pressure energy in the buffer chamber (6), and the pressure of the liquid in the buffer chamber (6) is increased, and the high-pressure fluid is delivered out through the liquid outlet (11).

2. The gas-liquid mixing boosting device according to claim 1, characterized in that: The gradually converging nozzle (7) is communicated with the outlet of the fluid pump through a liquid delivery pipe, and the air inlet pipe (10) is communicated with the air outlet of a steam pipe or an air pump or an air compressor through an air delivery pipe.

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