CN111921395A - Dissolved air type water jet device and dissolved air type water jet generation method - Google Patents
Dissolved air type water jet device and dissolved air type water jet generation method Download PDFInfo
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- CN111921395A CN111921395A CN202010752904.5A CN202010752904A CN111921395A CN 111921395 A CN111921395 A CN 111921395A CN 202010752904 A CN202010752904 A CN 202010752904A CN 111921395 A CN111921395 A CN 111921395A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/20—Jet mixers, i.e. mixers using high-speed fluid streams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/21—Mixing gases with liquids by introducing liquids into gaseous media
- B01F23/213—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids
- B01F23/2132—Mixing gases with liquids by introducing liquids into gaseous media by spraying or atomising of the liquids using nozzles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/83—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices
- B01F35/831—Forming a predetermined ratio of the substances to be mixed by controlling the ratio of two or more flows, e.g. using flow sensing or flow controlling devices using one or more pump or other dispensing mechanisms for feeding the flows in predetermined proportion, e.g. one of the pumps being driven by one of the flows
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Abstract
The invention discloses an air-dissolved water jet device and an air-dissolved water jet generating method, wherein the air-dissolved water jet device comprises an air-dissolved device and a water jet device; the gas dissolving device comprises a water tank, a carbon dioxide steel cylinder, a pressure reducing valve, a gas flowmeter, a gas booster pump, a pressure sensor, a bubble refiner and a heating belt; the water jet device comprises a plunger pump, a motor, a frequency converter, a pressure pipeline, a mobile platform and a nozzle. The air dissolving device is used for dissolving a certain amount of carbon dioxide gas into clear water in the water tank, the jet device is used for ejecting water flow with dissolved carbon dioxide gas from the nozzle, and the gas is separated out from high-speed water flow after being ejected from the nozzle, so that the impact force of water jet flow is enhanced. The method can obviously improve the impact erosion capability of the water jet and improve the impact efficiency of the water jet.
Description
Technical Field
The invention belongs to the field of water jet, relates to a water jet device, and particularly relates to an air-dissolved water jet device and an air-dissolved water jet generation method.
Background
As a high-energy beam processing technology, high-pressure water jet cutting is widely applied to the fields of mechanical processing, food medical treatment, ocean engineering and the like due to the unique cutting mode. When the pure water jet is used for impact cutting, the system pressure is high, the energy consumption of equipment is high, and great challenges are brought to the service life and the safety of the equipment. In order to enhance the cutting capability of the pure water jet, the high-pressure gas-liquid two-phase flow is used as a high-efficiency jet, the erosion effect under the condition of lower pressure can reach the level of medium-high pressure continuous jet, and the problems faced by the pure water jet can be well solved. The study data show that: the two-phase flow coal rock breaking efficiency is greatly improved, the threshold pressure of the coal rock breaking is reduced, and the hole punching diameter and the hole punching depth are 2 times of those of common jet flow.
The traditional air inlet mode of high-pressure gas-liquid two-phase flow generally sucks air at a nozzle, and the requirement on the nozzle structure is high. Although the air inlet mode in the high-pressure water jet is various, the air-liquid mixing is not uniform enough, so that the impact effect is not stable enough. In order to solve the problem of uneven gas-liquid mixing of the traditional high-pressure gas-liquid two-phase flow, the invention provides a novel gas-dissolving type water jet device and a method, which have important significance.
Disclosure of Invention
In order to overcome the problems and the defects, the invention provides an air-dissolved water jet device and an air-dissolved water jet generating method, and a set of device is designed according to the method so as to ensure that the method can improve the impact efficiency of the water jet and enhance the impact effect of the water jet.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
an air-dissolving water jet device, characterized in that: the device comprises a gas dissolving device and a water jet device, wherein the gas dissolving device comprises a water tank, a carbon dioxide gas supply device, an air supply device, a heating device, a pressure detection device and a controller, the carbon dioxide gas supply device is connected with the bottom of the water tank through a carbon dioxide gas supply pipe and is used for supplying carbon dioxide gas to the bottom of the water tank, the air supply device is connected with the upper part of the water tank through the air gas supply pipe and is used for supplying air to the top in the water tank, the heating device is used for heating the water tank and maintaining the water in the water tank at a set temperature, the pressure detection device is used for detecting the pressure of the top in the water tank, the bottom of the water tank is connected with the water jet device through a water outlet pipe, a water source dissolved with carbon dioxide is supplied to the water jet device, the controller receives a pressure signal of the pressure detection device and ensures, the upper part of the water tank is provided with a water inlet with a valve, and the top of the water tank is provided with a vent with a valve.
Further, carbon dioxide gas supply installation includes the carbon dioxide steel bottle and locates the relief pressure valve of carbon dioxide top export, the relief pressure valve is the electronic relief pressure valve through controller control, relief pressure valve export and carbon dioxide air supply pipe are equipped with the carbon dioxide gas flowmeter who is used for detecting the carbon dioxide flow of supply on the carbon dioxide air supply pipe, and the carbon dioxide flow that carbon dioxide gas flowmeter detected feeds back to the controller, and the controller controls carbon dioxide gas supply volume through control relief pressure valve size.
Further, air feeder includes gaseous booster pump and air flowmeter, the export of gaseous booster pump links to each other with the air supply pipe, air flowmeter locates on the air supply pipe for measure the air quantity of supplying with the water tank.
Further, a bubble refiner for dispersing carbon dioxide bubbles is arranged at the bottom in the water tank, and an outlet of the carbon dioxide gas supply pipe is connected with an inlet of the bubble refiner.
Further, the bubble refiner is low-pressure refined travertine.
Furthermore, the heating device comprises a heating belt and a temperature sensor, the heating belt is a resistance wire heating belt arranged around the inner wall of the water tank, the temperature sensor is used for measuring water temperature and feeding a water temperature signal back to the controller, and the controller receives the water temperature signal and controls the heating power of the heating belt.
Further, the pressure detection device is a pressure sensor with a field display function.
Furthermore, the water jet device comprises a plunger pump and a nozzle, wherein the inlet of the plunger pump is connected with a water outlet pipe at the bottom of the water tank, and the outlet of the plunger pump is connected with the inlet of the nozzle through a pressure water pipe.
Further, the nozzle is mounted on a moving platform for adjusting its position and attitude.
A dissolved-air type water jet generating method using any one of the above dissolved-air type water jet devices, characterized in that:
and 4, starting the water jet device, enabling water dissolved with carbon dioxide gas with fixed content to form a dissolved air type water jet through the water jet device, maintaining the temperature in the water tank to be constant through the heating device, simultaneously starting the carbon dioxide gas supply device and the air supply device, introducing air according to the ratio of the carbon dioxide to the air in the gas phase calculated in the step 1, and supplementing pressure to the top of the water tank to maintain the air pressure at the top of the water tank to be constant.
The invention uses carbon dioxide as the gas of high-pressure gas-liquid two-phase flow to carry out jet impact; before water flow enters a high-pressure water pump, carbon dioxide is dissolved in water under certain temperature and pressure conditions, pressure is applied through the water pump, the water with the dissolved carbon dioxide is sprayed out through a nozzle, and a jet impact experiment is carried out.
The invention particularly provides jet impact by using carbon dioxide gas which is low in price, non-toxic, harmless and soluble in water as a gas phase in high-pressure gas-liquid two-phase flow. Carbon dioxide gas is soluble in water at 25 ℃ under standard atmospheric pressure in a volume 0.76 times the volume of water. Experimental studies have shown that the volume multiple of carbon dioxide dissolved in water is proportional to the pressure when the temperature is constant, i.e. the higher the pressure, the greater the solubility. By using this property of carbon dioxide gas, the amount of dissolved carbon dioxide in the water can be controlled by varying the pressure. Water has a higher potential energy after being pressurized by a water pump, and carbon dioxide is dissolved in water at this time because the solubility of carbon dioxide is increased under a higher pressure. After passing through the nozzle, the potential energy of the high-pressure water with a large amount of dissolved carbon dioxide is converted into kinetic energy, the solubility of the carbon dioxide in the water is rapidly reduced due to the sudden release of the pressure, and the carbon dioxide dissolved in the water is converted into gas which is mixed with high-speed water flow to form novel high-pressure gas-liquid two-phase flow.
The invention designs a jet device capable of controlling dissolved carbon dioxide gas by combining with a traditional high-pressure water jet system, and the jet device is a necessary device capable of being effectively implemented.
The device mainly comprises a carbon dioxide dissolving device and a water jet device. Wherein the carbon dioxide dissolving device comprises a gas cylinder, a controller and a water tank. Wherein the gas cylinder is a pressure gas cylinder filled with carbon dioxide gas; the gas outlet of the gas cylinder is provided with a pressure reducing valve which can convey carbon dioxide gas with certain pressure. The water tank is provided with a temperature sensor and a pressure sensor, and the bottom of the water tank is provided with a heating belt.
Drawings
Fig. 1 is a schematic structural diagram of an air-dissolved water jet device according to an embodiment of the present invention.
The device comprises a carbon dioxide steel cylinder 1, a pressure reducing valve 2, a carbon dioxide gas flow meter 3, a gas booster pump 4, an air supply pipe 5, a pressure sensor 6, a bubble refiner 7, a water tank 8, a heating belt 9, a water inlet 10, a controller 11, a temperature sensor 12, a plunger pump 13, a motor 14, a frequency converter 15, a pressure water pipe 16, a moving platform 17, a nozzle 18, an air flow meter 19, a vent 20 and a carbon dioxide supply pipe 21.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, an air-dissolving water jet device comprises an air-dissolving device and a water jet device, wherein the air-dissolving device comprises a water tank 8, a carbon dioxide air supply device, an air supply device, a heating device, a pressure detection device and a controller 11, the carbon dioxide air supply device is connected with the bottom of the water tank 8 through a carbon dioxide air supply pipe 21 and is used for supplying carbon dioxide air to the bottom of the water tank 8, the air supply device is connected with the upper part of the water tank 8 through an air supply pipe 5 and is used for supplying air to the top in the water tank 8, the heating device is used for heating the water tank 8 and maintaining the water in the water tank 8 at a set temperature, the pressure detection device is used for detecting the air pressure at the top in the water tank 8, the bottom of the water tank 8 is connected with the water jet device through a water outlet pipe and is used for supplying a water, and the stability of the dissolved amount of the carbon dioxide in the water tank 8 is ensured by controlling the supply amount of the carbon dioxide air supply device and the air supply device, the upper part of the water tank 8 is provided with a water inlet 10 with a valve, and the top of the water tank 8 is provided with a vent 20 with a valve.
Carbon dioxide air feeder includes carbon dioxide steel bottle 1 and locates the relief pressure valve 2 of carbon dioxide top export, relief pressure valve 2 is the electronic relief pressure valve 2 through 11 controls of controller, 2 exports of relief pressure valve and carbon dioxide air supply pipe 21 are equipped with the carbon dioxide gas flowmeter 3 that is used for detecting the carbon dioxide flow of supplying with on the carbon dioxide air supply pipe 21, and the carbon dioxide flow that carbon dioxide gas flowmeter 3 detected feeds back to controller 11, and controller 11 controls carbon dioxide air supply volume through controlling 2 sizes of relief pressure valve.
The air supply device comprises a gas booster pump 4 and an air flow meter 19, wherein an outlet of the gas booster pump 4 is connected with an air supply pipe 5, and the air flow meter 19 is arranged on the air supply pipe 5 and used for measuring the air quantity supplied to the water tank 8.
The bottom in the water tank 8 is provided with a bubble refiner 7 for dispersing carbon dioxide bubbles, and the outlet of a carbon dioxide gas supply pipe 21 is connected with the inlet of the bubble refiner 7.
In this embodiment, the bubble refiner 7 is a low-pressure refined air disk stone, specifically, ZY-3090H model of Sensen brand.
Heating device includes heating band 9 and temperature sensor 12, heating band 9 is for surrounding the resistance wire heating band of installing around the inner wall of water tank 8, temperature sensor 12 is used for measuring the temperature to feed back the temperature signal to controller 11, and temperature sensor 12 installs at 8 lateral walls of water tank, controller 11 receives the temperature signal and controls the heating power of heating band 9, in this embodiment temperature sensor 12 is the temperature sensor who takes the on-the-spot display function, pressure detection device is for taking the pressure sensor 6 of on-the-spot display function.
The water jet device comprises a plunger pump 13 and a nozzle 18, wherein an inlet of the plunger pump 13 is connected with a water outlet pipe at the bottom of the water tank 8, an outlet of the plunger pump 13 is connected with an inlet of the nozzle 18 through a pressure water pipe 16, the plunger pump 13 is in power transmission connection with a motor 14, the motor 14 is connected with a frequency converter 15, the nozzle 18 is installed on a moving platform 17 (the existing mature technology, such as a three-dimensional moving platform or a two-dimensional moving platform, and detailed description is omitted) for adjusting the position and the posture of the nozzle 18, the plunger pump 13 is a corrosion-resistant plunger pump 13, the pressure water pipe 16 is a corrosion-resistant water pipe, and the nozzle 18 is a corrosion-resistant nozzle. The plunger pump 13 pressurizes water, and the pressure of the plunger pump 13 is controlled by adjusting the rotating speed of the motor 14 through the frequency converter 15.
The invention also provides a dissolved air type water jet generation method, which comprises the following specific steps:
And 2, adding L liters of pure water into the water tank 8 through the water inlet 10, opening the air vent 20, keeping the interior of the water tank 8 connected with the atmosphere, opening the heating belt 9, heating the water in the water tank 8, closing the air vent 20 and sealing the water tank 8 when the water temperature displayed by the temperature sensor 12 is maintained at the temperature T.
And step 3, opening the pressure reducing valve 2, introducing the carbon dioxide gas in the carbon dioxide steel cylinder 1 into the water tank 8 through the carbon dioxide gas supply pipe 21, and when the pressure in the water tank 8 detected by the pressure sensor 6 is stabilized at P, the amount of the carbon dioxide dissolved in the water reaches the target value M.
And 4, starting the controller 11, wherein the controller 11 can maintain the temperature in the water tank 8 to be constant by processing the temperature sensor 12 and the heating belt 9, and the opening of the pressure reducing valve 2 and the exhaust amount of the gas booster pump 4 are controlled by data of the pressure sensor 6, so that the carbon dioxide and air are controlled to be fed according to the calculated proportion, the total pressure in the water tank 8 is kept stable, and finally the partial pressure of the carbon dioxide in the gas above the water tank 8 is kept stable.
When the water in the water tank is used up, the gas-dissolving water jet device is reassembled, and the next water jet generation can be carried out according to the steps 2 to 5.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. An air-dissolving water jet device, characterized in that: the device comprises a gas dissolving device and a water jet device, wherein the gas dissolving device comprises a water tank, a carbon dioxide gas supply device, an air supply device, a heating device, a pressure detection device and a controller, the carbon dioxide gas supply device is connected with the bottom of the water tank through a carbon dioxide gas supply pipe and is used for supplying carbon dioxide gas to the bottom of the water tank, the air supply device is connected with the upper part of the water tank through the air gas supply pipe and is used for supplying air to the top in the water tank, the heating device is used for heating the water tank and maintaining the water in the water tank at a set temperature, the pressure detection device is used for detecting the pressure of the top in the water tank, the bottom of the water tank is connected with the water jet device through a water outlet pipe, a water source dissolved with carbon dioxide is supplied to the water jet device, the controller receives a pressure signal of the pressure detection device and ensures, the upper part of the water tank is provided with a water inlet with a valve, and the top of the water tank is provided with a vent with a valve.
2. The dissolved-air water jet device according to claim 1, wherein: the carbon dioxide gas supply device comprises a carbon dioxide steel cylinder and a pressure reducing valve arranged at the outlet of the top of carbon dioxide, the pressure reducing valve is an electric pressure reducing valve controlled by a controller, the outlet of the pressure reducing valve and a carbon dioxide gas supply pipe are provided with a carbon dioxide gas flowmeter used for detecting the flow of supplied carbon dioxide, the carbon dioxide flow detected by the carbon dioxide gas flowmeter is fed back to the controller, and the controller controls the carbon dioxide gas supply amount by controlling the size of the pressure reducing valve.
3. The dissolved-air water jet device according to claim 1, wherein: the air supply device comprises a gas booster pump and an air flow meter, wherein the outlet of the gas booster pump is connected with an air supply pipe, and the air flow meter is arranged on the air supply pipe and used for measuring the air quantity supplied to the water tank.
4. The dissolved-air water jet device according to claim 1, wherein: the bottom in the water tank is provided with a bubble refiner for dispersing carbon dioxide bubbles, and the outlet of the carbon dioxide gas supply pipe is connected with the inlet of the bubble refiner.
5. The dissolved-air water jet device according to claim 4, wherein: the bubble refiner is low-pressure refined travertine.
6. The dissolved-air water jet device according to claim 1, wherein: the heating device comprises a heating belt and a temperature sensor, the heating belt is a resistance wire heating belt arranged around the inner wall of the water tank, the temperature sensor is used for measuring water temperature and feeding a water temperature signal back to the controller, and the controller receives the water temperature signal and controls the heating power of the heating belt.
7. The dissolved-air water jet device according to claim 1, wherein: the pressure detection device is a pressure sensor with a field display function.
8. The dissolved-air water jet device according to any one of claims 1 to 7, wherein: the water jet device comprises a plunger pump and a nozzle, wherein the inlet of the plunger pump is connected with a water outlet pipe at the bottom of the water tank, and the outlet of the plunger pump is connected with the inlet of the nozzle through a pressure water pipe.
9. The dissolved-air water jet device according to claim 8, wherein: the nozzle is mounted on a moving platform for adjusting its position and attitude.
10. A dissolved-air water jet generating method using the dissolved-air water jet apparatus according to any one of claims 1 to 7, characterized in that:
step 1, determining the temperature corresponding to the required saturated dissolution amount and the partial pressure of carbon dioxide in a gas phase component above a liquid phase according to the solubility curve of the carbon dioxide in water, and calculating the proportion of the carbon dioxide and air in a gas phase;
step 2, in the water injection stage, a water inlet on the water tank is opened to inject water into the water tank, a valve of the vent is opened to keep the interior of the water tank communicated with the atmosphere, when the water level reaches a preset water level, the water inlet is closed, a heating device is opened to heat the interior of the water tank to the temperature determined in the step 1, and the temperature is maintained;
step 3, closing a valve of the vent, wherein the pressure in the water tank is atmospheric pressure, namely the gauge pressure measured by the pressure detection device is zero, opening a carbon dioxide gas supply device, and introducing carbon dioxide into the water in the water tank until the pressure detected by the pressure detection device is equal to the partial pressure of the carbon dioxide in the step 1;
and 4, starting the water jet device, enabling water dissolved with carbon dioxide gas with fixed content to form a dissolved air type water jet through the water jet device, maintaining the temperature in the water tank to be constant through the heating device, simultaneously starting the carbon dioxide gas supply device and the air supply device, introducing air according to the ratio of the carbon dioxide to the air in the gas phase calculated in the step 1, and supplementing pressure to the top of the water tank to maintain the air pressure at the top of the water tank to be constant.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113481921A (en) * | 2021-08-12 | 2021-10-08 | 长春旭阳智能装备有限公司 | Mobile environmental protection gas washing and sprinkling vehicle and control method thereof |
| CN114272777A (en) * | 2021-11-22 | 2022-04-05 | 煤炭科学技术研究院有限公司 | Two-phase jet mixing device and mixing method for realizing mixing of underground low-pressure gas |
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