CN116375136A - Hydrodynamic cavitation assembly of underground water circulation well - Google Patents
Hydrodynamic cavitation assembly of underground water circulation well Download PDFInfo
- Publication number
- CN116375136A CN116375136A CN202310353310.0A CN202310353310A CN116375136A CN 116375136 A CN116375136 A CN 116375136A CN 202310353310 A CN202310353310 A CN 202310353310A CN 116375136 A CN116375136 A CN 116375136A
- Authority
- CN
- China
- Prior art keywords
- cavitation
- screen
- screen section
- pipe
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C1/00—Reclamation of contaminated soil
- B09C1/002—Reclamation of contaminated soil involving in-situ ground water treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09C—RECLAMATION OF CONTAMINATED SOIL
- B09C2101/00—In situ
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Soil Sciences (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a hydrodynamic cavitation assembly of a groundwater circulation well, which is used for forming a diversion wake cavitation bubble to remove dirt blocked on a screen pipe of the circulation well. The hydrodynamic cavitation assembly is installed in a screen section of the circulating well body. The hydrodynamic cavitation assembly comprises a screen section elastic plate, a wedge-shaped pad and a screen section cavitation pipe. The screen pipe section elastic plates are in head-to-tail lap joint and are in annular arrays, and wedge-shaped gaskets are contained between the head ends and the tail ends of two adjacent screen pipe section elastic plates. The wedge-shaped pad is arranged on the pedestal of the hydrodynamic cavitation assembly and positioned at the tail end of the elastic plate of the screen section, and is wedged into the elastic plate of the screen section to enable the elastic plate of the screen section to bend and deform. The screen pipe section cavitation pipe is arranged on the screen pipe section elastic plate and turns along with the deformation of the screen pipe section elastic plate.
Description
Description of the division
The original foundation of the divisional application is the patent application with the application number of 202210566807.6, the application date of 2022, the month of 05 and the day of 23, and the name of the patent application is 'an underground water circulation well system'.
Technical Field
The invention relates to the technical field of in-situ restoration of groundwater pollution, in particular to a hydrodynamic cavitation assembly of a groundwater circulation well.
Background
The underground water circulating well is an in-situ repair technology capable of removing pollutants in underground water and saturated soil, and is a well-in-well mode formed by combining a double-layer sleeve pipe with an upper screen pipe and a lower screen pipe, wherein the extraction treatment technology is combined with the in-situ treatment technology, water in an aquifer can be introduced into the well through the lower screen pipe, then the aquifer is injected from the upper screen pipe, the aquifer is not brought out of the ground, and meanwhile, underground water is repeatedly circulated around the circulating well, and volatile pollutants in the underground water are continuously subjected to gas-liquid separation and pumped out to the ground for treatment, or are discharged to an air-covering belt through the upper screen pipe, and are degraded through in-situ bioremediation until the pollutants are sufficiently removed.
The groundwater circulation well technology drives water flow from a high pressure screen section to a low pressure screen section by dividing the well body into different screen sections and changing the water pressure distribution between the screen sections by pumping water or aerating between the different screen sections. The three-dimensional vertical circulating water flow formed around the underground water circulating well drives the polluted underground water in the surrounding aquifer to enter the circulating well, and the pollutant is removed by means of blowing off, degradation and the like. The underground water circulating well technology has the advantages of small stratum disturbance, small occupied area, simple operation and the like, so that the underground water circulating well technology has wide application prospect in the underground water restoration of a polluted site.
The existing circulating well technology has some defects, for example, the circulating well technology is easy to cause the damage of the gap of the water-bearing layer part around the circulating well in the well forming process, so that the slurry in the gap is easy to separate out; the repeated flushing of the circulating water flow easily causes precipitation of slurry components in the aquifer; the nature of the contaminants in the groundwater is not clear and the contaminants are unevenly distributed, and the contaminants are easy to be blocked when entering and exiting the sieve tube and are deposited at the part of the sieve tube where the flow speed is reduced; the chemical or biological components of the underground water are changed by the chemical or biological reinforced degradation means used in the repairing process, and the underground water is easy to form inorganic salt scale, organic oil film, biological film and other chemical and biological stains on the surface of the unclean or unsmooth screen pipe. The physical, chemical and biological stains accumulate into scales for a long time to block important components such as sieve holes of a sieve tube of the circulating well or an aeration head, so that underground water at the sieve tube part is blocked from flowing in and out, the radius of three-dimensional circulating water flow of the circulating well is reduced, and when the sieve tube is seriously blocked, the circulating function of the circulating well is completely lost, so that the circulating well is scrapped. These drawbacks have all seriously affected the development of the application of groundwater circulation well technology.
The prior art is like the chinese patent document with publication No. CN214763784U discloses a high-efficient filter screen for groundwater circulation well, which comprises a housin, the internal surface fixedly connected with canceling release mechanical system of casing, canceling release mechanical system's top and bottom are fixed mounting respectively has filter mechanism and lower filter mechanism, upward filter mechanism includes the upper frame, the inside fixed mounting of upper frame has the filter screen, lower filter mechanism includes the lower frame, the inside fixed mounting of lower frame has the filter screen down, the inside fixed mounting of casing has vibration mechanism, through setting up at the inside vibration mechanism of casing, makes vibration mechanism work drive filter mechanism vibrate, carries out vibration filtration to groundwater, reduces the impurity that contains in the groundwater, drives filter mechanism through the canceling release mechanical system that sets up and resets, cooperates vibration mechanism to make filter mechanism reciprocate, prevents that the impurity that filters in the groundwater from accumulating up and filtering out the filter screen and causing the jam to improve the filter effect of filter mechanism to groundwater. However, this apparatus filters coarse particle impurities by vibration, and does not consider fouling blockage of fine particle components or chemical and biological components. The device is only suitable for the preliminary filtration of groundwater, has lower anti-blocking capacity, and has poorer filtration effect on the polluted groundwater containing a large amount of chemical and biological components.
The Chinese patent document with the publication number of CN112682521A discloses a flushing-resistant multistage pressure reducing angle valve trim, which comprises a valve body and an upper cover, wherein the valve body is connected with the upper cover through a stud, a valve core, a valve seat, a sleeve, a first flushing-resistant pipe, a second flushing-resistant pipe and a third flushing-resistant pipe are arranged in the valve body, the upper end of the second flushing-resistant pipe is connected with the upper cover through a rotation-resistant flat key in a positioning manner, the second flushing-resistant pipe is connected with the first flushing-resistant pipe through an embedding process, the first flushing-resistant pipe is connected with the valve body through interference fit, the first flushing-resistant pipe is installed with a pipeline protruding surface flange through a clamping manner, the valve core adopts an axial-flow multistage pressure reducing structure, and the valve core is connected with a valve rod through a cladding manner. The invention avoids cavitation by axial-flow type multistage depressurization, avoids cavitation damage risk of the valve element, but also loses the advantages of cavitation in the aspects of enhancing water quality activity, preventing scaling, blocking, scrapping and the like of the valve element.
The Chinese patent document with publication number of CN102417233A provides a hydrodynamic cavitation oxygenation aerator, which belongs to a device for efficiently aerating and aerating water during biochemical treatment of sewage and directly degrading organic pollutants in water by utilizing the generated hydrodynamic cavitation effect. The hydrodynamic cavitation oxygenation aerator comprises a motor and a transmission shaft, wherein: the motor is arranged on the upper end cover, a motor shaft penetrates through a shaft hole of the upper end cover to be connected with the upper end of a transmission shaft, the lower end of the transmission shaft is connected with the spiral stirring impeller, the motor is arranged on the upper end cover of the oxygenation aeration cylinder through the upper end cover and positions the transmission shaft and the spiral stirring impeller in an inner cavity of the oxygenation aeration cylinder, and the conical porous flow blocking plate is arranged on the lower portion of the inner cavity of the oxygenation aeration cylinder and is positioned below the spiral stirring impeller. The device is through the whole aeration of aeration barrel, although can reduce the aeration dead angle, the aeration is too even, and is not strong to each taper aperture aeration pertinence of spoiler, and the gas content in the taper aperture water can not improve to higher level rapidly. The cavitation jet direction of the device also has no adjustable characteristic.
In summary, the existing circulation well system does not consider the fouling blockage of fine particle components or chemical and biological components when the coarse particle impurities are filtered by vibration to prevent the blockage of the circulation well screen; when the existing circulating well system utilizes the hydrodynamic cavitation effect to prevent the blocking of the circulating well screen pipe, the cavitation jet flow direction is not adjustable, and the decontamination efficiency is limited.
The hydrodynamic cavitation assembly provided by the invention can release high-energy shock waves and microjet to forcefully remove dirt blocked on the screen pipe of the circulating well, and can avoid the deposition of particle impurities with different sizes and medicaments with different concentrations on the screen pipe; the activity of the underground water can be enhanced, so that the dissolution capacity of the underground water to scale forming substances is improved; the screen pipe surface can be cleaned, vibration with different frequencies is caused, and the capability of the scale forming substances to adhere to and scale on the screen pipe surface is reduced, so that the risk of screen pipe blockage is effectively reduced.
Furthermore, there are differences in one aspect due to understanding to those skilled in the art; on the other hand, as the inventors studied numerous documents and patents while the present invention was made, the text is not limited to details and contents of all that are listed, but it is by no means the present invention does not have these prior art features, the present invention has all the prior art features, and the applicant remains in the background art to which the rights of the related prior art are added.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a groundwater circulation well system, which aims at solving at least one or more technical problems existing in the prior art.
In the existing in-situ remediation technology of the circulating well, the anti-blocking measure of the circulating well sieve tube comprises the addition of a high-efficiency vibration filter sieve or the injection of a scale removing agent outside the circulating well, and the scale removing agent can directly or indirectly reduce the blocking caused by coarse particle impurities of underground water or high-concentration agent passing through the circulating well sieve tube. However, these measures ignore the risk of blockage caused by scaling and precipitation of elements such as iron and manganese due to fine particle impurities, low concentration agents or change of redox conditions of groundwater. These fine particle impurities or low concentration agents are suspended in groundwater for a long period of time and repeatedly pass through the screen with a greater risk of clogging. Therefore, the invention applies for an underground water circulating well system, which couples hydrodynamic cavitation and circulating well technology to reduce the risk of screen pipe blockage of an in-situ repairing circulating well, and achieves the purposes of maintaining normal running of underground water circulating function and improving the practicality of the circulating well technology.
The hydraulic cavitation assembly can be respectively arranged on an upper screen pipe section and a lower screen pipe section of a circulating well, and comprises a cavitation pipe, wherein the cavitation pipe adopts a variable diameter structure, a rotary blade is arranged at the water inlet end of the cavitation pipe, and groundwater is driven by high pressure difference in the circulating well to enter the cavitation pipe with variable pipe diameter so as to drive the rotary blade to rotate at a high speed to form a water inlet vortex, so that local pressure reduction occurs in the cavitation pipe, and cavitation bubbles are formed, developed and destroyed at the internal part of the groundwater flowing through the cavitation pipe and a solid-liquid interface of the groundwater and the inner wall of the cavitation pipe. When cavitation bubbles in the cavitation tube are broken, the cavitation bubbles generate instantaneous local high temperature and high pressure to form strong cavitation shock waves and microjet, and the microjet speed can reach 400km/h. If cavitation bubbles break down on the screen surface corresponding to the cavitation tubes, high energy shock waves and microjets will form a high pressure region on the screen surface, and the single cavitation bubbles will break down at a small point on the screen surface, so that the large energy released by the cavitation bubbles is concentrated in many very small area units on the screen surface, where dirt composed of fine particle impurities is deposited, and the strong erosion of cavitation bubbles can break down the dirt in the screen. Meanwhile, cavitation bubbles generate vibration with different frequencies in the compression and release processes, the vibration is transmitted to the surfaces of the sieve tube and the dirt with different natural frequencies through groundwater, the sieve tube and the dirt are excited to vibrate with different frequencies, and then the binding force between the sieve tube and the dirt is destroyed, so that the dirt on the sieve tube is loosened; in particular, the frequency fluctuation caused by the cavitation process is large, and compared with the traditional vibration filtering measure, the invention obviously improves the efficiency of removing dirt with different natural vibration frequencies on different parts of the sieve tube.
In addition, the aeration pump supplies air to the aeration port corresponding to the water inlet end of the cavitation pipe, so that a large amount of ions are accumulated at the air-liquid interface of cavitation bubbles in the cavitation pipe, the ions can generate local high-concentration strong oxidation free radicals in the cavitation pipe, water molecules of underground water are promoted to be cracked into active substances such as H, HO and the like, the active substances can improve the activity of the underground water and enhance the dissolution capacity of the underground water, the scale dissolution capacity of the underground water is improved, the surface of a screen pipe is cleaned, the scale is not easy to deposit on the surface of the screen pipe to form hard scale, and release of scale-forming substance microcrystal nuclei can be promoted, and the scale-forming substances are gradually digested. When the cavitation bubbles break down on the surface of the sieve tube, the gas in the cavitation bubbles absorbs heat at a higher temperature, and is difficult to cool down in a short time through water-gas heat exchange, so that the hot gas flows bake the formed dirt substances, thereby accelerating the disintegration and dissolution of dirt on the surface of the sieve tube.
The circulating well body of the invention is composed of a plurality of screen sections and solid pipe sections which are axially separated from each other, the circulating well of the double-screen structure is composed of an upper screen section and a lower screen section, wherein polluted groundwater to be purified passes through screens of the lower screen section from outside the lower screen section and enters the lower screen section based on an external-internal pressure difference, and groundwater entering the lower screen section is pumped into the upper screen section by a water pumping and injecting switching component of the circulating well body, wherein groundwater to be purified accumulated in the upper screen section passes through screens of the upper screen section to an aqueous stratum outside the upper screen section based on an internal-external pressure difference, a diversion hydraulic cavitation component capable of forming wake cavitation bubbles is arranged in the upper screen section and/or the lower screen section, and the hydraulic cavitation component is circumferentially arranged at corresponding positions so as to form cavitation bubble liquid flows containing cavitation bubbles for removing respective dirt before entering the screens by means of groundwater flow to be purified at the corresponding screen ends.
According to a preferred embodiment, cavitation bubbles in the wake emanate from a circumferentially distributed hydrodynamic cavitation assembly including at least a component other than radial, such that the wake impinges radially on a liquid stream including at least a circumferential component of the corresponding screen.
According to a preferred embodiment, the circumferential component in the wake is adjustable by changing the orientation of the cavitation tubes of the hydrodynamic cavitation assembly.
According to a preferred embodiment, a first hydrodynamic cavitation assembly is positioned within the upper screen section, the first hydrodynamic cavitation assembly having a plurality of cavitation tubes disposed along the circumferential inner wall, the cavitation tubes having aeration tubes at their water inlet front ends for increasing the gas core content of the groundwater at the water inlet front ends of each cavitation tube to promote cavitation bubbles formation.
According to a preferred embodiment, a second hydrodynamic cavitation assembly is positioned outside the lower screen section, the second hydrodynamic cavitation assembly having a plurality of cavitation tubes distributed along the circumferential inner wall, the cavitation tubes having aeration tubes at the water inlet front for increasing the gas core content of the groundwater at the water inlet front of each cavitation tube to promote cavitation bubbles formation.
According to a preferred embodiment, the hydrodynamic cavitation assembly is provided with rotary blades at the water inlet front ends of the cavitation tubes, respectively, the rotary blades being rotatable so that the water inlet flow of the cavitation tubes is vortex flow, thereby increasing the area of the low pressure area of the water inlet front ends of the cavitation tubes to promote the formation of cavitation bubbles.
According to a preferred embodiment, the lower screen section has a smaller diameter than the upper screen section, such that the lower screen section has a necked down portion.
According to a preferred embodiment, by means of the elasticity of the fixed plates carrying the respective cavitation tubes, the wake flow is able to induce a change in elasticity of the fixed plates and thus a change in orientation of the wake, so that the circumferential component flow comprised by the wake impinging on the respective screen is also time-varying.
According to a preferred embodiment, the orientation of each cavitation tube has a substantially uniform circumferential component such that the flow exiting all cavitation tubes has a substantially uniform circumferential flow component in the screen circumference, and the circumferential component flow when the wake impinges on the corresponding screen creates a uniform flow in the direction throughout the screen circumference.
According to a preferred embodiment, the orientation of the individual cavitation tubes is jointly adjustable, in particular the orientation of the individual cavitation tubes arranged in an axial line is adjustable by means of a common adjustment mechanism.
The hydrodynamic cavitation assembly has the advantages that the hydrodynamic cavitation assembly can release high-energy shock waves and microjet to forcefully remove dirt blocked on the screen pipe of the circulating well, and can avoid the deposition of particle impurities with different sizes and medicaments with different concentrations on the screen pipe; the activity of the underground water can be enhanced, so that the dissolution capacity of the underground water to scale forming substances is improved; the screen pipe surface can be cleaned, vibration with different frequencies is caused, and the capability of the scale forming substances to adhere to and scale on the screen pipe surface is reduced, so that the risk of screen pipe blockage is effectively reduced. The invention can solve the problem that the existing underground water circulating well technology only can prevent coarse particle impurities and high-concentration medicaments from being blocked by the coupling of the hydrodynamic cavitation assembly and the circulating well, greatly improves the anti-blocking capacity of the underground water circulating well and the repairing capacity of the underground water circulating well technology by the hydrodynamic cavitation assembly, and can prevent the problems of precipitation and blocking of the particle impurities with different sizes and the medicaments with different concentrations, thereby obviously relieving the blocking problem of the well body while repairing the underground water pollutants with high efficiency and leading the application range of the circulating well provided by the invention to be wider.
Drawings
FIG. 1 is a simplified schematic diagram of a circulation well system according to a preferred embodiment of the present invention;
FIG. 2 is a simplified three-dimensional schematic of a circulation well system according to a preferred embodiment of the present invention;
FIG. 3 is a simplified three-dimensional schematic of the hydrodynamic cavitation assembly of the present invention;
fig. 4 is a schematic cross-sectional three-dimensional view of the hydrodynamic cavitation assembly of the present invention.
List of reference numerals
1: a lower screen section tie rod; 2: upper screen Duan Lagan; 3: a ground treatment station; 4: an aeration pump; 5: an air collecting pump; 6: a water pump; 7: a gas collecting hood; 8: the upper sieve tube section is injected with an air pipe; 9: wiring grooves; 10: a screen section; 11: an upper screen section elastic plate; 12: an automatic switching component for pumping and injecting water; 13: upper screen section cavitation tube; 14: an upper sieve tube; 15: an upper screen section rotating blade; 16: a packer; 17: an aeration port of the upper screen pipe section; 18: an annular aerator pipe; 19: a lower screen pipe protection cylinder; 20: a lower screen section; 21: a lower sieve tube section gas injection tube; 22: a lower sieve tube section aeration port; 23: a lower screen section rotating blade; 24: a lower screen section elastic plate; 25: a lower screen section cavitation tube; 26: a lower sieve tube; 27: a hydrodynamic cavitation assembly base; 28: a wedge pad; 29a: a first hydrodynamic cavitation assembly; 29b: a second hydrodynamic cavitation assembly; 30: and (5) circulating the well body.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings.
The invention relates to a hydrodynamic cavitation underground water circulation well system, which comprises a circulation well body 30. The circulation well body 30 is composed of an upper screen section 10 and a lower screen section 20 which are axially separated from each other, wherein groundwater to be purified is introduced into the lower screen section 20 through the screens of the lower screen section 20 from outside the lower screen section 20 based on an external-internal pressure difference, and groundwater introduced into the lower screen section 20 is pumped into the upper screen section 10 by a water pumping and injecting switching assembly of the circulation well body 30, wherein groundwater to be purified accumulated in the upper screen section 10 is introduced into an aqueous formation outside the upper screen section 10 through the screens of the upper screen section 10 based on an external-internal pressure difference.
The invention also has in the upper screen section 10 and/or the lower screen section 20, steerable hydrodynamic cavitation assemblies 29a, 29b which can form wake cavitation bubbles, circumferentially arranged at the respective screen locations to form a flow of cavitation bubbles containing cavitation bubbles for cleaning the respective screen dirt at the inflow front end of the respective screen by means of groundwater flow to be purified.
The hydrodynamic cavitation assemblies 29a, 29b form wake cavitation bubbles in the groundwater flow to be purified by the groundwater flow being driven by the hydrodynamic cavitation assemblies 29a, 29b through cavitation tubes of varying diameter in the direction of flow thereof and thereby forming cavitation bubbles in the wake of the hydrodynamic cavitation assemblies 29a, 29 b.
According to FIG. 1, the circulating well body 30 may include an upper screen 14, a lower screen 26, and a packer 16, wherein the packer 16 divides the circulating well body 30 into an upper screen section 10 and a lower screen section 20. The walls of the upper screen 14 and the lower screen 26 are filled with quartz sand so that the inside and outside of the pipe are in filterable communication; the upper screen 14 and lower screen 26 allow water to flow through the well wall.
According to fig. 1, the water pumping and filling switching assembly of the present invention is configured as a water pumping and filling automatic switching assembly 12, which comprises a flat pipe, a first vertical pipe and a second vertical pipe vertically connected to two sides of the flat pipe, and the first vertical pipe is parallel to the second vertical pipe. The first standpipe port is located in the lower screen section 20 as a water inlet for groundwater and the second standpipe port is located in the upper screen section 10 as a water outlet for groundwater. Preferably, the flat pipe is parallel to the packer 16 and is higher than the ground water level, and the water pumping pump 6 for pumping ground water is arranged on the flat pipe, so that the outer wall of the water pumping pump 6 and the circuit in the pump are not contacted with the ground water, and the circuit short circuit caused by the ground water is avoided, and the extraction of the ground water is interrupted. When the water pump 6 is started, groundwater in the lower screen section 20 enters the first standpipe from the first standpipe port, flows to the flat pipe and the second standpipe, flows out from the second standpipe port, and enters the upper screen section 10.
In the present invention, the system extracts and injects the contaminated groundwater in the lower screen section 20 into the upper screen section 10 by means of the water injection pump 6, and the groundwater entering the upper screen section 10 flows through the hydrodynamic cavitation assembly 29a disposed on the side of the upper screen section 10 facing away from the aquifer and then enters the aquifer around the circulation well through the walls of the upper screen 14. As the groundwater is pumped away, the inner cavity of the lower screen section 20 creates a negative pressure space and the surrounding aquifer groundwater is forced under pressure into the lower screen section 20 from a hydrodynamic cavitation assembly 29b disposed on the aquifer-facing side of the lower screen section 20. The water pumping and injecting automatic switching assembly 12 utilizes the water pumping and injecting pump 6 to pump water between different screen sections, so that the underground water pressure difference is generated between the upper screen section 10 and the lower screen section 20, and thus three-dimensional vertical circulating water flow is formed to drive underground water into the well to be removed.
According to fig. 1, the invention further comprises a ground treatment station 3, an air collecting pump 5 and an air collecting hood 7, wherein the air collecting pump 5 is arranged on the pipe body of the air collecting pipe, the umbrella-shaped air collecting hood 7 is arranged on one end of the air collecting pipe which is positioned in the upper screen pipe section 10 and is higher than the groundwater level, and the other end of the air collecting pipe is connected with the ground treatment station 3. The ground treatment station 3, the gas collecting pipe and the gas collecting hood 7 are internally communicated, the gas collecting pump 5 is started, and waste gas in the circulating well body 30 is collected through the gas collecting hood 7 and then is input into the ground treatment station 3 for concentrated treatment of the waste gas. The ground treatment station 3 is located on the ground and an operator controls the groundwater circulation well system in the ground treatment station 3. The gas collecting channel 7 and the gas collecting pump 5 can be arranged in the part of the upper screen section 10 above the groundwater level with respect to the water suction pump 6.
According to fig. 1 and 4, the invention further comprises a first hydrodynamic cavitation assembly 29a, a second hydrodynamic cavitation assembly 29b, and a hydrodynamic cavitation assembly base 27 carrying the first hydrodynamic cavitation assembly 29a and the second hydrodynamic cavitation assembly 29b, respectively. The first hydrodynamic cavitation assembly 29a includes an upper screen section spring plate 11, a wedge pad 28 and an upper screen section cavitation tube 13. The second hydrodynamic cavitation assembly 29b includes a lower screen section elastic plate 24, a wedge pad 28 and a lower screen section cavitation tube 25.
The first hydrodynamic cavitation assembly 29a is arranged in the upper screen section 10, and the second hydrodynamic cavitation assembly 29b is arranged in the lower screen section 20, so that the risk of simultaneous blockage of the upper screen and the lower screen can be reduced, and the damage to the circulation function caused by blockage of one or two screen sections can be prevented, thereby achieving the purpose of maintaining normal operation of the groundwater circulation function.
Preferably, as shown in FIG. 1, a first hydrodynamic cavitation assembly 29a is positioned within the upper screen section 10, the first hydrodynamic cavitation assembly 29a having a plurality of cavitation tubes disposed along the circumferential inner wall with aeration tube air feed at the forward water inlet end for increasing the gas core content of the groundwater at the forward water inlet end of each cavitation tube to promote cavitation bubbles formation. In the upper screen section 10, the aeration pipe for the gas supply is provided as an annular aeration pipe 18.
Preferably, by means of the elasticity of the fixed plates carrying the respective cavitation tubes, a change in elasticity of the fixed plates can be induced upon wake flow, thereby bringing about a change in orientation of the wake, such that the circumferential component flow involved when the wake impinges the respective screen is also time-varying. The fixing plate of the present invention may be provided as an elastic plate and the upper screen section elastic plate 11 and the lower screen section elastic plate 24 are provided according to the installation positions thereof at different screen sections.
According to fig. 4, the upper screen section elastic plates 11 are of arc structures, the head ends of the upper screen section elastic plates 11 are clamped on the hydrodynamic cavitation assembly base 27 through fasteners, the tail end portions of the upper screen section elastic plates 11 are lapped on the head ends of the adjacent upper screen section elastic plates 11, and the upper screen section elastic plates 11 are lapped head and tail and are uniformly distributed in an annular array mode. Wedge-shaped pads 28 can be contained between the head and the tail of two adjacent upper screen section elastic plates 11, and the wedge-shaped pads 28 are arranged on the hydrodynamic cavitation assembly base 27 and positioned at the tail of the upper screen section elastic plates 11, and can be wedged into the upper screen section elastic plates 11 to enable the upper screen section elastic plates 11 to bend and deform. The upper screen pipe section cavitation pipe 13 comprises a water inlet end, a water outlet end and a communicating pipe, wherein the water inlet end is communicated with the water outlet end through the communicating pipe, and a dumbbell-shaped integrated structure is formed with the communicating pipe. The upper screen section cavitation pipe 13 is arranged on the upper screen section elastic plate 11, can turn along with the deformation of the elastic plate, and has a water inlet end positioned on one side of the hydrodynamic cavitation assembly base 27 where the wedge-shaped pad 28 is arranged and a water outlet end positioned on one side away from the wedge-shaped pad 28.
Preferably, the hydrodynamic cavitation assemblies 29a, 29b are provided with rotary blades respectively upstream of each cavitation tube corresponding thereto, the rotary blades being rotatable so that the water inflow of the cavitation tubes is turbulent, thereby increasing the area of the low pressure zone at the water inflow front end of the cavitation tubes to promote the formation of cavitation bubbles.
The first hydrodynamic cavitation assembly 29a includes upper screen section rotating blades 15 and the second hydrodynamic cavitation assembly 29b includes lower screen section rotating blades 23. An upper screen pipe section rotating blade 15 is arranged on the outer wall of the water inlet end of the upper screen pipe section cavitation pipe 13, the outer wall of the upper screen pipe section cavitation pipe 13 is connected with the upper screen pipe section rotating blade 15 through a bearing, a conduit for gas and liquid to circulate is arranged in the center of the upper screen pipe section rotating blade 15, and the conduit is communicated with the inside of the water inlet end of the upper screen pipe section cavitation pipe 13.
The second hydrodynamic cavitation assembly 29b has the same structure and installation as the first hydrodynamic cavitation assembly 29 a.
Preferably, the elastic plate of the present invention refers to a thin plate made of a material that is easily bent by an external force, for example, an elastic rigid plate and a corrosion-resistant thin plate made of an expansion-contraction material. Bending deformation of the resilient plate may also be achieved by mounting resilient members on the contact surface of the resilient plate with the wedge pads 28. The size of the elastic plates can be designed according to actual needs, and the axial and longitudinal spacing between the elastic plates can be adjusted, so that the number of the elastic plates on the hydrodynamic cavitation assembly base 27 is changed, and the requirements of different hydrodynamic cavitation flux sizes are further met.
Preferably, the wedge-shaped pad 28 of the present invention refers to a pad having two different thicknesses, wherein one end of the pad is pointed, and can be engaged with other objects to perform the function of raising. Wedge pad 28 may be made of an alloy, ferrite or other magnetic material, and may be rectangular, square, triangular or other shape.
Preferably, the number of the cavitation tubes on the elastic plate is not limited to one, the number of the cavitation tubes on the same elastic plate can be multiple, and the distance between the cavitation tubes on the same elastic plate can be adjusted, so that the number of the cavitation tubes is changed, and the more the number of the cavitation tubes is, the greater the flux of hydrodynamic cavitation is.
In the upper screen section 10, according to figures 1 and 3, the hydrodynamic cavitation assembly base 27 is nested in the upper screen 14 with the upper screen section rotating blades 15 facing away from the aquifer side. The water outlet ends of the plurality of upper screen section cavitation pipes 13 are arranged eccentrically towards the upper screen 14 and relative to the central axis of the upper screen 14. By this eccentric arrangement, cavitation bubbles in the wake of the present invention include at least a component other than radial when emanating from the circumferentially distributed hydrodynamic cavitation assemblies 29a, 29b, such that the wake includes at least a circumferential component of the fluid flow when radially impacting the corresponding screen.
Groundwater in the upper screen section 10 enters the water inlet end of the upper screen section cavitation pipe 13 through the guide pipe of the upper screen section rotating blade 15 and drives the upper screen section rotating blade 15 to rotate at a high speed, so that water inlet vortex is formed at the water inlet end of the upper screen section cavitation pipe 13, the area of a low-pressure area in the upper screen section cavitation pipe 13 is increased, cavitation bubbles are generated in the upper screen section cavitation pipe 13, and the cavitation bubbles are sprayed to the wall of the upper screen 14 from the water outlet end of the upper screen section cavitation pipe 13 in the form of cavitation shock waves and microjet so as to achieve the purpose of washing the screen pipe wall and scale forming substances in the pipe.
According to fig. 1, the water inlet end of the cavitation tube 13 of the upper screen section is provided with an aeration port 17 of the upper screen section corresponding to the water inlet end, a gap for accommodating the aeration port 17 of the upper screen section is defined between two adjacent rotary blades 15 of the upper screen section, the aeration port 17 of the upper screen section is arranged on an annular aeration tube 18, and the interior of the annular aeration tube 18 is communicated with a corresponding aeration tube 8 of the upper screen section. According to the invention, the gas core content is rapidly supplemented to the water inlet end of the upper screen section cavitation pipe 13 through the upper screen section aeration port 17, so that the purpose of promoting the gas core to form cavitation bubbles in the upper screen section cavitation pipe 13 is achieved.
Preferably, the hydrodynamic cavitation assemblies 29a, 29b of the present invention, in conjunction with the upper and lower screen section cavitation tubes 13, 25 and upper and lower screen section elastic plates 11, 24, and wedge pads 28, are operable to redirect in the circulating well body 30, and also to operate in and transition between the descaling and debulking phases and the scale control and protection phases. The hydrodynamic cavitation assembly can achieve a better balance state between descaling and blocking removal, scaling prevention and screen cavitation protection, and improves the practicability of a circulating well technology. Under different stages, the wedge-shaped pad 28 selectively works, and the deformation of the elastic plate is increased or decreased by the hydrodynamic cavitation assembly through the adjustment of the footage of the wedge-shaped pad 28, so that the jet angle and the distance of the cavitation tube in the elastic plate to the sieve tube are changed, and the damage intensity of cavitation bubbles of the hydrodynamic cavitation assembly to scale forming substances and the erosion of the sieve tube is further adjusted. Therefore, the hydrodynamic cavitation assembly has the characteristic of multiple working modes, thereby achieving the purposes of reducing the risk of screen pipe blockage and simultaneously reducing the cavitation speed of the side wall of the screen pipe, and further prolonging the service life of the underground water circulation well.
Preferably, the circumferential component in the wake of the present invention is adjustable by changing the orientation of the cavitation tubes of hydrodynamic cavitation assemblies 29a, 29b and by adjusting the circumferential component of the wake, hydrodynamic cavitation assemblies 29a, 29b are switched between the descaling and deblinding stage and the scale control and protection stage.
Preferably, in the upper screen section 10, when the first hydrodynamic cavitation assembly 29a is in the descaling and plugging removing stage, the wedge-shaped pad 28 does not work, the upper screen section elastic plates 11 are not bent and deformed, the overlap joint fit between the two adjacent upper screen section elastic plates 11 is high, the sealing performance is high, polluted groundwater is fed in and discharged through the upper screen section cavitation pipes 13 penetrating through the upper screen section elastic plates 11, the pipe diameter change of the upper screen section cavitation pipes 13 causes the flow velocity and pressure of the polluted groundwater flowing through the upper screen section cavitation pipes 13 to suddenly change, hydrodynamic cavitation occurs when the pressure is smaller than the saturated vapor pressure, and at this time, the first hydrodynamic cavitation assembly 29a works at full load, and the cavitation efficiency is high. Because the upper screen section elastic plate 11 is not bent and deformed, the upper screen section cavitation pipe 13 on the upper screen section elastic plate 11 is vertical to the pipe wall of the upper screen 14, at this time, the angle of cavitation bubbles generated by the first hydrodynamic cavitation component 29a impacting the pipe wall of the upper screen 14 is the largest, the distance between the cavitation bubbles and the upper screen 14 is the shortest, the number of cavitation bubbles which can reach the pipe wall of the upper screen 14 and break down in the pipe is the largest, cavitation shock waves and microjet are vertical to the upper screen 14, the upper screen 14 is positively eroded, and at this time, the descaling capability of the first hydrodynamic cavitation component 29a is the strongest. In the first hydrodynamic cavitation assembly 29a, polluted groundwater sequentially passes through the rotating blades 15 of the upper screen section and the cavitation tube 13 of the upper screen section, and then flows to the upper screen 14, and cavitation bubbles are broken in the tube wall and the tube of the upper screen 14, so that the purpose of powerful descaling and blockage removal is achieved.
Preferably, when in the scale control and pipe protection stage, the wedge pad 28 works, the upper screen section elastic plates 11 are bent and deformed due to the wedge pad 28, the two adjacent upper screen section elastic plates 11 are separated, the tightness is weakened, the upper screen section cavitation pipes 13 on the upper screen section elastic plates 11 are driven to turn, at this time, the upper screen section cavitation pipes 13 and the upper screen 14 do not form a vertical relationship, the angle of cavitation bubbles generated by the first hydrodynamic cavitation assembly 29a impacting the upper screen 14 pipe wall is reduced, the distance from the upper screen 14 is increased, the number of cavitation bubbles capable of reaching the upper screen 14 pipe wall and breaking in the pipe is reduced, and cavitation damage capability to the upper screen 14 is weakened. Meanwhile, the polluted groundwater can enter and exit through the gap between the two adjacent upper screen section elastic plates 11 besides entering and exiting through the upper screen section cavitation pipe 13, so that double entering and exiting passages are formed, and part of groundwater entering and exiting through the gap does not generate hydrodynamic cavitation, so that the damage capability to the upper screen 14 is weaker. The wedge pads 28 change the amount of deformation of the upper screen section elastic plates 11 by changing the height and slope of the wedge pads themselves, and the size of the gap between two adjacent upper screen section elastic plates 11.
The height of the wedge-shaped pad 28 is not fixed, the height of the wedge-shaped pad 28 can be self-regulated in the working process of the wedge-shaped pad 28, and the height of the wedge-shaped pad 28 is respectively in direct proportion to the deformation of the elastic plate, the directional amplitude of the cavitation tube and the cavitation shock wave and micro-jet energy adjustable interval of the sieve tube. The higher the wedge-shaped pad 28 is, the larger the deformation of the elastic plate is when the full scale is inserted into the elastic plate, the larger the amplitude of the cavitation tube fixed on the elastic plate is, and the wider the cavitation shock wave and micro-jet energy adjustable interval of the sieve tube is. The gradient of the wedge-shaped pad 28 is not fixed, the gradient self-adjustment can be carried out in the working process of the wedge-shaped pad 28, the gradient of the wedge-shaped pad 28 is respectively in direct proportion to the deformation of the elastic plate and the amplitude of the cavitation tube, and the gradient is in inverse proportion to the cavitation shock wave and micro-jet energy adjustment precision of the sieve tube. The smaller the gradient of the wedge-shaped pad 28, the smaller the deformation of the elastic plate is, the smaller the change of the direction of the cavitation tube fixed on the elastic plate is, and the higher the cavitation shock wave and micro-jet energy adjustment precision of the sieve tube is, preferably, the gradient of the wedge-shaped pad 28 is a flat angle or an acute angle smaller than 60 degrees, and the elastic plate can be accurately and continuously wedged, so that the direction of the cavitation tube is accurately and continuously changed, and the gradual transition from the cavitation with the aim of descaling and blocking removal to the cavitation with the aim of anti-scaling sieve tube protection is realized.
Preferably, the orientation of the individual cavitation tubes of the present invention is jointly adjustable, in particular the orientation of the individual cavitation tubes arranged in an axial line is adjustable by a common adjustment mechanism.
According to fig. 1, 2 and 3, the invention further comprises a plurality of pull rods, including an upper screen section pull rod 2 and a lower screen section pull rod 1, the side surfaces of the wedge-shaped pads 28 are connected with the pull rods, the wedge-shaped pads 28 which are arranged in the same column in the vertical direction are in a group, each group of wedge-shaped pads 28 is connected with the same vertical pull rod, the pull rods drive one group of wedge-shaped pads 28 to synchronously lift, and the pull rods of different groups can be connected to synchronously lift. The vertical lifting pull rod can drive a group of wedge-shaped pads 28 to be inserted into the elastic plate for continuous change of footage. Therefore, under the synchronous lifting of the pull rod, the orientation of each cavitation tube has approximately the same circumferential component, so that the liquid flow flowing out of all the cavitation tubes has approximately the same circumferential liquid flow component along the circumference of the screen pipe, the circumferential component liquid flow of wake flow impacting the corresponding screen pipe forms uniform flow in the circumferential direction of the whole screen pipe, the direction of the cavitation tubes can be continuously and uniformly regulated, and the cavitation for the purpose of descaling and blocking removal is gradually changed to the cavitation for the purpose of anti-scaling screen pipe. The pull rod acts on the scale prevention and protection pipe stage.
In the upper screen pipe section 10, when the first hydrodynamic cavitation assembly 29a is in the scale prevention and pipe protection stage, the upper screen pipe section pull rod 2 is lifted to drive the wedge-shaped pad 28 to be wedged into the upper screen pipe section elastic plate 11 to increase the ruler, the deformation of the upper screen pipe section elastic plate 11 is increased, the angle and distance between the upper screen pipe section cavitation pipe 13 arranged on the upper screen pipe section elastic plate 11 and the upper screen pipe 14 are changed, cavitation shock waves and micro-jet generated by the first hydrodynamic cavitation assembly 29a weaken the erosion damage effect of the upper screen pipe 14, and the purposes of changing the activities of groundwater and scale forming substances and protecting the screen pipe are mainly achieved.
Preferably, a second hydrodynamic cavitation assembly 29b is located outside the lower screen section 20, the second hydrodynamic cavitation assembly 29b having a plurality of cavitation tubes distributed along the circumferential inner wall, the cavitation tubes having aeration tube feed at the forward water end for increasing the gas core content of the groundwater at the forward water inlet end of each cavitation tube to promote cavitation bubbles formation. The aeration pipe of the lower screen section 20 is provided as a lower screen section gas injection pipe 21 which is internally connected in communication with the annular aeration pipe 18 in the upper screen section 10.
According to FIG. 1, in lower screen section 20, hydrodynamic cavitation assembly base 27 is nested with lower screen 26 with the lower screen section rotating blades 23 facing the aquifer side. The water outlet ends of the plurality of screen section cavitation tubes 25 are disposed eccentrically toward the screen 26 and relative to the central axis of the screen 26. Groundwater in the surrounding aquifer enters the water inlet end of the cavitation pipe 25 of the lower screen section through the guide pipe of the rotating blade 23 of the lower screen section and drives the rotating blade 23 of the lower screen section to rotate at high speed, thereby forming water inlet vortex at the water inlet end of the cavitation pipe 25 of the lower screen section, increasing the area of a low-pressure area in the cavitation pipe 25 of the lower screen section, so that cavitation bubbles are generated in the cavitation pipe 25 of the lower screen section, and the cavitation bubbles are sprayed from the water outlet end of the cavitation pipe 25 of the lower screen section to the pipe wall of the lower screen 26 in the form of cavitation shock waves and microjet so as to achieve the purpose of washing the pipe wall and scale forming substances in the pipe.
According to fig. 1, in the lower screen section 20, a lower screen section aeration port 22 corresponding to the lower screen section cavitation pipe 25 is arranged at the water inlet end of the lower screen section cavitation pipe, a gap for accommodating the lower screen section aeration port 22 is defined between two adjacent lower screen section rotating blades 23, the lower screen section aeration port 22 is arranged on an annular aeration pipe 18, and the inside of the annular aeration pipe 18 is communicated with a corresponding lower screen section gas injection pipe 21. According to the invention, the gas core content is rapidly supplemented into the water inlet end of the cavitation pipe 25 of the lower screen pipe section through the aeration port 22 of the lower screen pipe section, so that the purpose of promoting the gas core to form cavitation bubbles in the cavitation pipe 25 of the lower screen pipe section is achieved. The annular aeration device provided by the invention is used for point-to-point aeration of each cavitation pipe, so that the gas core content of the water inlet of the corresponding cavitation pipe can be rapidly and effectively increased, the occurrence probability of hydrodynamic cavitation is improved, and the hydrodynamic cavitation effect is ensured. The invention solves the problem that the cavitation tube gas core content cannot be rapidly increased to a higher level due to the fact that the hydrodynamic cavitation device is too evenly aerated through the targeted annular aeration device in the prior art.
In the lower screen section 20, the second hydrodynamic cavitation assembly 29b operates in the same manner as the first hydrodynamic cavitation assembly 29a in the descaling and blocking removal stage, and a detailed description thereof will be omitted.
In the lower screen section 20, when the second hydrodynamic cavitation assembly 29b is in the scale preventing and protecting stage, the wedge pad 28 works, the lower screen section elastic plates 24 are bent and deformed due to the wedge pad 28, the two adjacent lower screen section elastic plates 24 are separated, the sealing performance is weakened, the lower screen section cavitation pipes 25 on the lower screen section elastic plates 24 are driven to turn, at this time, the lower screen section cavitation pipes 25 and the lower screen 26 do not form a vertical relationship, the angle of cavitation bubbles generated by the second hydrodynamic cavitation assembly 29b impacting the wall of the lower screen 26 is reduced, the distance from the lower screen 26 is increased, the number of cavitation bubbles which can reach the wall of the lower screen 26 and break in the pipe is reduced, and cavitation damage capability to the lower screen 26 is weakened. Meanwhile, the polluted groundwater can enter and exit through the gap between the two adjacent lower screen section elastic plates 24 besides entering and exiting through the lower screen section cavitation pipe 25, so that double entry and exit channels are formed, and part of groundwater entering and exiting through the gap does not generate hydrodynamic cavitation, so that the damage capability to the lower screen 26 is weaker. The wedge pads 28 change the amount of deformation of the lower screen section spring plates 24 and the size of the gap between adjacent lower screen section spring plates 24 by changing their height and slope.
When the anti-scale pipe protection stage is performed, the pull rod 1 of the lower screen pipe section arranged in the wiring groove 9 is lifted to drive the wedge-shaped pad 28 to be wedged into the elastic plate 24 of the lower screen pipe section to increase the footage, the deformation of the elastic plate 24 of the lower screen pipe section is increased, the angle and the distance between the cavitation pipe 25 of the lower screen pipe section arranged on the elastic plate 24 of the lower screen pipe section and the lower screen pipe 26 are changed, and cavitation shock waves and micro-jet generated by the second hydrodynamic cavitation assembly 29b weaken the erosion damage effect of the lower screen pipe 26, so that the purposes of changing the activities of underground water and scale forming substances and protecting the screen pipe are mainly achieved.
Preferably, a lower screen protection cylinder 19 is arranged outside the second hydrodynamic cavitation assembly 29b, and the lower screen protection cylinder 19 can define a partial virtual space between the second hydrodynamic cavitation assembly 29b and the surrounding aquifer for protecting the second hydrodynamic cavitation assembly 29b outside the circulation well from extrusion damage of the surrounding aquifer or gravel. The polluted underground water enters the partial virtual-drop space beyond the lowest point of the lower screen protection cylinder 19, and then enters the second hydrodynamic cavitation assembly 29b and the lower screen 26 in sequence to enter the circulating well to participate in three-dimensional vertical water flow circulation.
Preferably, as depicted in FIG. 1, the lower screen section 20 has a smaller diameter than the upper screen section 10, such that the lower screen section 20 has a necked down portion so that the overall diameter of the lower screen section 20 with the second hydrodynamic cavitation assembly 29b is no greater than the diameter of the upper screen section 10, reducing installation costs.
It should be noted that the above-described embodiments are exemplary, and that a person skilled in the art, in light of the present disclosure, may devise various solutions that fall within the scope of the present disclosure and fall within the scope of the present disclosure. It should be understood by those skilled in the art that the present description and drawings are illustrative and not limiting to the claims. The scope of the invention is defined by the claims and their equivalents. Throughout this document, the word "preferably" is used in a generic sense to mean only one alternative, and not to be construed as necessarily required, so that the applicant reserves the right to forego or delete the relevant preferred feature at any time.
Claims (10)
1. A hydrodynamic cavitation assembly of a groundwater circulation well for forming a reversible wake cavitation bubble to remove scale clogged on a screen of the circulation well is characterized in that,
the hydrodynamic cavitation assembly is mounted in a screen section (10, 20) of a circulating well body (30);
the hydrodynamic cavitation assembly comprises a screen section elastic plate (11, 24), a wedge-shaped pad (28) and a screen section cavitation pipe (13, 25);
the screen pipe section elastic plates (11, 24) are overlapped end to end and are in an annular array, and the wedge-shaped pads (28) are contained between the head and the tail of two adjacent screen pipe section elastic plates (11, 24);
The wedge-shaped pad (28) is arranged on the hydrodynamic cavitation assembly base (27) and positioned at the tail end of the screen section elastic plate (11, 24), and is wedged into the screen section elastic plate (11, 24) to cause bending deformation;
the screen section cavitation pipes (13, 25) are arranged on the screen section elastic plates (11, 24) and turn along with the deformation of the screen section elastic plates (11, 24).
2. Hydrodynamic cavitation assembly according to claim 1, wherein,
the screen pipe section elastic plates (11, 24) adopt arc structures, the head ends of the screen pipe section elastic plates (11, 24) are clamped on the hydrodynamic cavitation assembly base (27) through fasteners, and tail end portions of the screen pipe section elastic plates (11, 24) are lapped on the head ends of the adjacent screen pipe section elastic plates (11, 24).
3. Hydrodynamic cavitation assembly according to claim 1 or 2, wherein the screen section cavitation tubes (13, 25) comprise a water inlet end, a water outlet end and a communication tube;
the water inlet end is communicated with the water outlet end through a communicating pipe, and forms a dumbbell-shaped integrated structure with the communicating pipe, so that the screen pipe section cavitation pipes (13, 25) are of a variable diameter structure;
the water inlet end is positioned at one side of the hydrodynamic cavitation assembly base (27) where the wedge-shaped pad (28) is arranged, and the water outlet end is positioned at one side of the hydrodynamic cavitation assembly base which is away from the wedge-shaped pad (28).
4. A hydrodynamic cavitation assembly according to any one of claims 1-3 wherein the screen section cavitation tubes (13, 25) are arranged along the circumferential inner wall of the screen section (10, 20), the water inlet ends of the screen section cavitation tubes (13, 25) being provided with aeration ports (17, 22) for air supply.
5. Hydrodynamic cavitation assembly according to any of claims 1-4, further comprising screen section rotating blades (15, 23);
the screen section rotating blades (15, 23) are mounted on the outer wall of the water inlet end of the screen section cavitation pipe (13, 25), and the outer wall of the screen section cavitation pipe (13, 25) is connected with the screen section rotating blades (15, 23) through bearings.
6. Hydrodynamic cavitation assembly according to any of claims 1-5, wherein the circulating well body (30) comprises an upper screen (14), a lower screen (26) and a packer (16), wherein the packer (16) divides the circulating well body (30) into an upper screen section (10) and a lower screen section (20);
the hydrodynamic cavitation assembly comprises a first hydrodynamic cavitation assembly (29 a) and a second hydrodynamic cavitation assembly (29 b), wherein the first hydrodynamic cavitation assembly (29 a) is arranged in the upper screen section (10), and the second hydrodynamic cavitation assembly (29 b) is arranged in the lower screen section (20);
The first hydrodynamic cavitation assembly (29 a) comprises an upper screen section elastic plate (11), a wedge-shaped pad (28), an upper screen section cavitation pipe (13) and an upper screen section rotating blade (15), and the second hydrodynamic cavitation assembly (29 b) comprises a lower screen section elastic plate (24), a wedge-shaped pad (28), a lower screen section cavitation pipe (25) and a lower screen section rotating blade (23);
the second hydrodynamic cavitation assembly (29 b) has the same structure and the same installation mode as the first hydrodynamic cavitation assembly (29 a).
7. Hydrodynamic cavitation assembly according to any one of claims 1 to 6, wherein in the upper screen section (10), the hydrodynamic cavitation assembly base (27) is fitted over the upper screen (14), the water outlet ends of a plurality of the upper screen section cavitation pipes (13) being arranged eccentrically to the central axis of the upper screen (14) and toward the upper screen (14);
the wake cavitation bubbles, when emitted from the circumferentially distributed hydrodynamic cavitation assembly, comprise at least a component other than radial such that the wake impinges on a corresponding screen in a radial direction comprising at least a circumferential component of the fluid flow.
8. Hydrodynamic cavitation assembly according to any one of claims 1 to 7, wherein the circumferential component in the wake is adjustable by changing the cavitation tube orientation of the hydrodynamic cavitation assembly.
9. Hydrodynamic cavitation assembly according to any of claims 1-8, further comprising an upper screen section pull rod (2) and a lower screen section pull rod (1), the wedge pads (28) being laterally connected to the pull rod, the wedge pads (28) being vertically aligned in a single group, each group of wedge pads (28) being connected to the same vertical pull rod, the pull rod driving a group of wedge pads (28) to be raised and lowered simultaneously, the different groups of pull rods being connectable to be raised and lowered simultaneously, the vertical raising and lowering pull rod driving a group of wedge pads (28) to be successively changed in wedge into the elastic plate feed, each of the cavitation tubes being oriented with a substantially uniform circumferential component such that the flow exiting all of the cavitation tubes has a substantially uniform circumferential flow component in the screen circumference, whereby the circumferential component flow forms a uniform flow in the entire screen circumference when the wake impinges on the corresponding screen.
10. Hydrodynamic cavitation assembly according to any of claims 1-9, wherein the orientation of the upper screen section cavitation tube (13) and the lower screen section cavitation tube (25) is jointly adjustable, in particular the orientation of each screen section cavitation tube (13, 25) aligned in the axial direction is adjustable by a common adjustment mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353310.0A CN116375136A (en) | 2022-05-23 | 2022-05-23 | Hydrodynamic cavitation assembly of underground water circulation well |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310353310.0A CN116375136A (en) | 2022-05-23 | 2022-05-23 | Hydrodynamic cavitation assembly of underground water circulation well |
| CN202210566807.6A CN114804291B (en) | 2022-05-23 | 2022-05-23 | Underground water circulation well system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210566807.6A Division CN114804291B (en) | 2022-05-23 | 2022-05-23 | Underground water circulation well system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116375136A true CN116375136A (en) | 2023-07-04 |
Family
ID=82517842
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210566807.6A Active CN114804291B (en) | 2022-05-23 | 2022-05-23 | Underground water circulation well system |
| CN202310353310.0A Pending CN116375136A (en) | 2022-05-23 | 2022-05-23 | Hydrodynamic cavitation assembly of underground water circulation well |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210566807.6A Active CN114804291B (en) | 2022-05-23 | 2022-05-23 | Underground water circulation well system |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN114804291B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116573713B (en) * | 2023-06-09 | 2024-03-22 | 浙江路弘科技有限公司 | Hydrodynamic cavitation generating device and cavitation method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005028306A (en) * | 2003-07-07 | 2005-02-03 | Institute Of Computational Fluid Dynamics | Gas-liquid mixing device, and sewage purifying device |
| KR100841958B1 (en) * | 2007-07-19 | 2008-06-27 | 한세구 | Pump that have cavitation prevention function |
| US7699994B2 (en) * | 2007-08-02 | 2010-04-20 | Ecosphere Technologies, Inc. | Enhanced water treatment for reclamation of waste fluids and increased efficiency treatment of potable waters |
| JP5935034B2 (en) * | 2011-06-08 | 2016-06-15 | 上田 文夫 | Buoyancy hollow falling water generator |
| CN208166743U (en) * | 2018-03-21 | 2018-11-30 | 江苏大地益源环境修复有限公司 | A kind of circulation well device for organic contamination underground water in-situ immobilization |
| CN108655160B (en) * | 2018-05-21 | 2021-02-26 | 永清环保股份有限公司 | Three-dimensional circulating disturbance strengthening device and method for in-situ remediation of underground water |
| CN215828375U (en) * | 2021-06-25 | 2022-02-15 | 天津生态城环保有限公司 | Device for in-situ remediation of underground water circulating well |
| CN114278271B (en) * | 2021-11-22 | 2022-10-04 | 中国地质大学（北京） | Composite circulating well system and using method |
-
2022
- 2022-05-23 CN CN202210566807.6A patent/CN114804291B/en active Active
- 2022-05-23 CN CN202310353310.0A patent/CN116375136A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN114804291B (en) | 2023-02-28 |
| CN114804291A (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5448050B2 (en) | Water treatment device and water treatment device filter medium cleaning method | |
| US7776213B2 (en) | Apparatus for enhancing venturi suction in eductor mixers | |
| US8349176B2 (en) | Modular integrated water-purifying device | |
| JP5201481B2 (en) | Water treatment device and water treatment device filter medium cleaning method | |
| CN116375136A (en) | Hydrodynamic cavitation assembly of underground water circulation well | |
| KR100927673B1 (en) | Dissolved air injection type flotation tank | |
| CN111704309A (en) | Water circulating device for grinding machine | |
| CN211659404U (en) | Building washing water circulating device with high separation efficiency | |
| CN104740925A (en) | Pre-pump floating self-cleaning microfiltration device | |
| KR102574690B1 (en) | Scum Removal System of Sewage Treatment Sediment Tank | |
| CN104208941A (en) | Fiber rotary disk filtration tank | |
| KR100756820B1 (en) | Water catchment equipment capable of backwashing by water and air | |
| CN108558022B (en) | Fluidized bed sewage treatment device | |
| CN209392799U (en) | A kind of municipal wastewater processing unit | |
| CN115487698B (en) | High-pressure vortex efficient separation method for pollutants in soil | |
| CN204159086U (en) | A kind of Continuous Flow sand filter | |
| CN102372387A (en) | Advanced treatment process of municipal wastewater | |
| CN204502547U (en) | Floating self-cleaning micro-filtration before pump | |
| KR101662430B1 (en) | Conduit type apparatus for treating wastewater | |
| CN111170610A (en) | Mud-water separation equipment | |
| RU2452695C2 (en) | Aerator | |
| CN206604232U (en) | A kind of sewage-treatment plant and its tube settler | |
| CN211871597U (en) | Tertiary filtration sewage recovery unit has | |
| CN219539543U (en) | Air floatation tank dissolved air water pump water inflow filter device | |
| CN219666283U (en) | Recycling system of metal cutting sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |