WO2021134815A1

WO2021134815A1 - Artificial rainfall system

Info

Publication number: WO2021134815A1
Application number: PCT/CN2020/071027
Authority: WO
Inventors: 臧伟仲
Original assignee: 鹏禹时代传媒(广州)有限公司
Priority date: 2020-01-03
Filing date: 2020-01-08
Publication date: 2021-07-08
Also published as: CN113068554A

Abstract

Disclosed is an artificial rainfall system. The artificial rainfall system comprises an air production pipe (1), a negative pressure device (2), a movable supercharging device (4) and a lifting pipe (5), wherein an air production opening of the air production pipe (1) is located in high-altitude cold air; the negative pressure device (2) is connected to the air production pipe (1) to drive cold air in the air production pipe (1) to flow from the air production opening to an air supply opening of the air production pipe (1); the input end of the movable supercharging device (4) is connected to the air supply opening of the air production pipe (1), and the output end thereof is connected to the lifting pipe (5), so as to pump cold air at the air supply opening into the lifting pipe (5); and the lifting pipe (5) can lift an air exhaust part to a cloud layer so as to release the cold air into the cloud layer. When the positions requiring rainfall are different, the movable supercharging device and the lifting pipe can be moved to the area requiring rainfall, and the movable supercharging device is then connected to the air supply opening of the air production pipe, such that the purpose of rainfall in different areas according to requirements can be achieved.

Description

An artificial rainfall system

Technical field

The invention relates to the technical field of fresh air supply, in particular to an artificial rainfall system.

Background technique

Artificial rainfall refers to artificially supplementing certain necessary conditions for the formation of precipitation, which promotes the rapid condensation or collision of cloud droplets and increases into raindrops, which fall to the ground. The main form of cold cloud rainfall is to use airplanes, rockets, etc. to sow dry ice and other catalysts, so that cloud droplets cool down and produce a large number of ice crystals, increase the density of ice crystals on the upper part of cold clouds, and promote or increase precipitation. The current method requires the application of artificial catalysts and the use of rockets, airplanes and other tools. While increasing rainfall, it will also cause corresponding pollution to rainwater and air.

On the other hand, in the stratosphere above the clouds, the air temperature is low, and it is highly clean and pollution-free. However, there is currently no solution that can make use of the low temperature characteristics of this part of the airflow to rain.

technical problem

The purpose of the present invention is to avoid the above-mentioned shortcomings in the prior art and provide an artificial rainfall system that uses high-altitude cold air to rain. The system can avoid pollution to the high-altitude air and rainwater, and can be moved to different locations. Rain.

Technical solutions

[Invention idea]: The inventor considers that if the high-altitude cold air can be guided to the clouds, the natural cold air can be used to cool the clouds, so that the clouds will produce ice crystals and rain. However, there are two major problems with this concept: one is based on objective physical laws. To guide the cold air in the stratosphere to descend, it is necessary to use a negative pressure device, and the negative pressure device needs to be installed in the middle of the airflow. The airflow flows from the stratosphere to the clouds, which means that the negative pressure device needs to be suspended between the clouds and the stratosphere. This kind of difficulty is great, and it is inevitable that pollutants will be produced during the operation of the negative pressure device, which in turn will bring certain pollution to the air and rainwater. The second is that the negative pressure device determines the volume, weight, and natural inconvenience due to its huge power, and the pipeline extending to the stratosphere is also inconvenient to move due to the strength and size requirements, so it consumes a lot of manpower and material resources. The stratospheric diversion device built here generally needs to be fixed and cannot be easily moved. However, because the location of rainfall is not necessarily, it needs to rain at different locations during different periods. If the stratospheric diversion device needs rainfall according to the need Moving the location will inevitably reduce its practical value.

Therefore, the purpose of the present invention is achieved through the following technical solutions:

An artificial rainfall system is provided, which includes a gas production pipe, a negative pressure device, a mobile booster device, and a lifting pipe. The gas production port of the gas production pipe is located in high-altitude cold air, and the negative pressure device is connected to the gas production pipe to Drive the cold air in the gas extraction tube to flow from the gas extraction port to the air supply port of the gas extraction tube. The input end of the mobile booster device is connected to the air supply port of the gas extraction tube, and the output end is connected to the lift pipe to reduce the cooling of the air supply port. The air is pumped into the lift pipe, and the lift pipe can rise until its exhaust part is located in the cloud layer, thereby releasing cold air into the cloud layer.

Wherein, the tube wall of the elevator tube is made of high-strength lightweight fiber membrane, and the front end of the elevator tube is connected to a balloon filled with low-density gas. The balloon is released to pull the elevator tube up, and the low-density gas Refers to a gas with a lower density than air.

Wherein, the tube wall of the lift pipe is spliced by airbags, and the airbags are filled with low-density gas, and the low-density gas refers to gas with a lower density than air.

Wherein, the airbag is an annular airbag, and the annular airbag is spliced section by section to form the lifting tube.

Wherein, the wall of the airbag is a high-strength lightweight fiber membrane.

Wherein, the exhaust portion includes a main body, a lateral exhaust port located on the peripheral side of the main body portion, and a top exhaust port located on the top surface of the main body portion.

Wherein, the pipeline between the input end of the mobile pressurizing device and the gas supply port of the gas sampling pipe is detachably spliced.

Wherein, the tube wall of the gas sampling tube is made of titanium alloy added with carbon fiber, and the cross section of the tube wall of the gas sampling tube is in a honeycomb shape.

Wherein, it further includes a thermoelectric power generation device, the gas supply port of the gas extraction tube is also connected to the thermoelectric power generation device, the thermoelectric power generation device obtains the low-temperature gas transported by the gas extraction tube for power generation, and the gas outlet of the thermoelectric power generation device is connected to The mobile supercharging device is connected.

Wherein, the gas production port of the gas production pipe is located in the stratosphere.

Beneficial effect

The beneficial effects of the present invention: In the present invention, pure cold air is obtained from a high altitude by a negative pressure device through a gas sampling tube, and then it is transported to the cloud layer through a mobile pressurizing device and a lifting tube, and the cloud layer is cooled to achieve the purpose of rainfall. The elevator tube can be used to raise the elevator tube to the cloud when rain is needed, and the elevator tube can be recovered without rainfall. These operations can be completed on the ground. Correspondingly, the negative pressure device connected to the elevator tube can also be set on the ground. The cloud layer avoids the pollution and inconvenience caused by the need to set up the negative pressure device in the air; in addition, when the location where rainfall is required is different, only the mobile booster device and the lifting pipe need to be moved to the area that needs rainfall, and then the mobile Connecting the booster device (either a hose or a detachable pipe) to the air supply port of the gas extraction pipe can achieve the purpose of raining in different areas conveniently.

Description of the drawings

The present invention will be further explained with the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, without creative work, other can be obtained according to the following drawings. Attached.

Figure 1 is a schematic diagram of the structure of an artificial rainfall system of the present invention.

Included in Figure 1 are:

1——Gas collection pipe, 2——Negative pressure device, 3——Temperature generator, 4——Mobile supercharging device, 5——Lifting pipe, 6——Exhaust part.

本发明的具体实施方式Specific embodiments of the present invention

The present invention will be further described in conjunction with the following examples.

An artificial rainfall system, as shown in Figure 1, includes a gas production pipe 1. The top of the gas production pipe 1 is a gas production port, which is located in the stratosphere to collect stratospheric air, and the bottom end of the gas production pipe 1 is a gas supply The air supply port is connected to the negative pressure device 2 through the thermoelectric generator 3, and the output end of the negative pressure device 2 is connected to the air supply pipe network. The air port passes through the thermoelectric generator 3 and the negative pressure device 2 in sequence. After the air flow comes out of the negative pressure device 2, it is connected to the mobile pressurizing device 4 through a detachable splicing pipe. The mobile pressurizing device 4 releases the air flow to the clouds along the lifting pipe 5 so as to condense the clouds and rain.

The system is mainly used to draw the clean air of the stratosphere to the ground, and then release it along the elevator pipe 5 to the cloud layer that needs rainfall. The air sampling pipe 1, the negative pressure device 2, the mobile booster device 4 and the lifting pipe 5 together constitute an air flow path. Although the passage is long, due to the characteristics of the fluid, the work required by the negative pressure device 2 is close to removing the air from The work required to guide the stratosphere to the cloud layer, while the mobile supercharger 4 is more of an auxiliary drainage function, and the overall power consumption of the system has a limited increase in power consumption.

Among them, the more critical is the gas production pipe 1. Since the stratosphere is relatively far from the ground, the height of the gas production pipe 1 is very high, and high-speed air flow is required in it, and the external air flow will also affect it, so its strength must also be strong. In addition, it is necessary to consider the difficulty of construction and the issue of heat preservation. If the strength is increased blindly and the weight is too large, it is not convenient for construction; and to achieve the purpose of rainfall, it is necessary to ensure that the temperature of the air does not rise sharply during the flow. In order to balance strength and weight, this embodiment adopts the gas sampling tube 1 whose tube wall is made of titanium alloy with boron fiber added, and the interface of the tube wall is in a honeycomb shape. The titanium alloy with boron fiber added is a composite material. The boron fiber generally uses the fiber with boron carbide or silicon carbide coating; and the titanium base usually uses Ti-6Al-4V or the better plastic β-type titanium alloy Ti- 15V-3Cr-3Sn-3Al), the composite material generally contains 35%-40% fiber (vol), the longitudinal tensile strength is about 1300-1500MPa, the modulus is about 230GPa, and the density is about 3.7g/cm3. Therefore, the material has high strength, light weight and low thermal conductivity. The honeycomb shape can increase the strength as much as possible with as little weight as possible. It is currently known that the strength of the structure made of titanium alloy with boron fiber added can reach 80 GPa or more, and the honeycomb shape is further reduced. The thermal conductivity of the pipe wall makes it difficult for the gas in the passing and gas sampling pipe 1 to exchange heat with the outside.

Another key technology is the lifting tube 5, which must meet the following conditions: light and easy to move; capable of convenient lifting operation; with better heat preservation performance, avoiding a large amount of heat absorption and heating during air transmission. Based on the above conditions, this embodiment adopts the ring-shaped airbags to be spliced section by section to form the lifting tube 5. The ring-shaped airbags are filled with low-density gas. The low-density gas refers to gas with a lower density than air. The wall is a high-strength lightweight fiber membrane. When it is necessary to change the lifting tube 5 to rise, the annular airbag is inflated, so that the annular airbag generates buoyancy relative to the air, and then gradually rises. When it needs to be lowered, the annular airbag is deflated to reduce its buoyancy, so that it is gradually lowered and recovered. On the other hand, the annular airbag structure can effectively heat insulation, so as to achieve the purpose of heat preservation. Of course, non-circular airbags can also be used. For example, splicing of sheet-shaped airbags can also achieve the above effects, and those skilled in the art can make selections according to needs. It's just that the circular airbag is relatively easy to process and easy to recycle. In addition, in order to ensure that the lifting tube 5 is finally arranged vertically, the size of the ring airbag at the top of the lifting tube 5 can be increased, so that the buoyancy of the ring airbag at the top is greater than that of other ring airbags.

In addition, it should be noted that this embodiment only uses one elevator pipe 5. In fact, according to the area where rainfall is needed, the number of elevator pipes 5 can be increased, as long as these elevator pipes 5 are connected to the gas production pipe 1 respectively. In order to release the cold air into the clouds more uniformly, an exhaust section 6 is provided on the top of the lift pipe 5. The exhaust section 6 includes a main body, a lateral exhaust port on the periphery of the main body, and a main body. The top exhaust port on the top surface.

In order to ensure that the negative pressure fan can effectively extract air flow, it is recommended that the driving air flow rate is about 800m/s. Preliminary calculations show that in this implementation, a fan blade with a diameter of 1000 (mm), a speed of 550 (r/m), and an air flow rate of 35000 cubic meters per hour (m3/h) are used. Of course, those skilled in the art can flexibly adjust the parameters of the negative pressure device 2 according to the supply scale of the system, as long as the flow rate of the airflow is fast enough to reach the bottom surface quickly.

In this embodiment, the purpose of setting a thermoelectric generator 3 between the air outlet of the gas sampling pipe 1 and the negative pressure device 2 is to use cold air to generate electricity, so as to compensate for the energy consumption of the negative pressure device 2 and reduce the overall energy consumption of the system. The thermoelectric generator 3 is mainly a device for generating electricity based on the Seebeck effect. Different metals and semiconductors have different Seebeck coefficients (the Seebeck effect produced is different), and the main causes of semiconductors and metals are slightly different. Semiconductors have different carrier densities at different temperatures. When there is a temperature difference between the two ends of a single semiconductor, the carriers will diffuse to eliminate the difference in density, resulting in electromotive force. The greater the temperature difference between the two ends, the greater the Seebeck potential difference produced. The free electron density and Fermi level of metals hardly change with temperature, so the Seebeck effect of metals is much smaller than that of semiconductors. The Seebeck effect of metals is determined by the mean free path of electrons. If the mean free path increases with temperature, the free electrons at the hot end have a higher chance of moving to the cold end, and the Seebeck coefficient at this time is negative. Conversely, if the mean free path of electrons decreases as the temperature rises, the free electrons at the cold end have a higher chance to flow to the hot end, and the Seebeck coefficient is positive. Therefore, in this thermoelectric power generation device, the high-altitude air will be heated up, and electric energy will be generated for power supply. That is to say, the thermoelectric generator 3 is used to generate electricity, and the electric energy can be used to assist the work of the negative pressure device 2 to reduce the energy consumption of the negative pressure device 2, or it can be directly output to the mains for power supply, no matter which way, Both can effectively reduce the overall energy consumption of the system and improve the economy of the system. Of course, in order to ensure that the temperature of the air is sufficient to make the clouds condense and rain, the power of the generator should be limited to ensure that the overall temperature of the air meets the rainfall demand.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand The technical solution of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solution of the present invention.

Claims

An artificial rainfall system, characterized in that it comprises a gas production pipe, a negative pressure device, a mobile booster device and a lifting pipe, the gas production port of the gas production pipe is located in the cold air at high altitude, and the negative pressure device is connected to the gas production pipe , To drive the cold air in the gas production pipe to flow from the gas production port to the gas supply port of the gas production pipe. The input end of the mobile booster device is connected to the gas supply port of the gas production pipe, and the output end is connected to the lift pipe to connect the gas supply port The cold air is pumped into the elevator pipe, and the elevator pipe can rise until its exhaust part is located in the cloud layer, thereby releasing the cold air into the cloud layer.
The artificial rainfall system of claim 1, wherein the wall of the lift pipe is made of high-strength lightweight fiber membrane, and the front end of the lift pipe is connected to a balloon filled with low-density gas. To be released is to pull the elevator pipe up, and the low-density gas refers to a gas with a lower density than air.
The artificial rainfall system according to claim 1, wherein the pipe wall of the lift pipe is spliced by airbags, the airbags are filled with low-density gas, and the low-density gas refers to a density lower than that of air. gas.
The artificial rainfall system according to claim 3, wherein the airbag is an annular airbag, and the annular airbag is spliced section by section to form the lifting tube.
The artificial rainfall system of claim 3, wherein the wall of the airbag is a high-strength lightweight fiber membrane.
The artificial rainfall system according to claim 1, wherein the exhaust part includes a main body, a lateral exhaust port located on the peripheral side of the main body, and a top exhaust port located on the top surface of the main body.
The artificial rainfall system according to claim 1, wherein the pipeline between the input end of the mobile booster device and the gas supply port of the gas extraction pipe is detachably spliced.
The artificial rainfall system according to claim 1, wherein the wall of the gas sampling tube is made of titanium alloy with carbon fiber added, and the cross section of the wall of the gas sampling tube is honeycomb-shaped.
The artificial rainfall system according to claim 1, further comprising a thermoelectric power generation device, the gas supply port of the gas production pipe is also connected to the thermoelectric power generation device, and the thermoelectric power generation device obtains the information transmitted by the gas production pipe. Low-temperature gas is used to generate electricity, and the air outlet of the thermoelectric power generation device is connected to the mobile supercharging device.
The artificial rainfall system according to claim 1, wherein the gas production port of the gas production pipe is located in the stratosphere.