CN111794702A - Degassing vibrating screen - Google Patents
Degassing vibrating screen Download PDFInfo
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- CN111794702A CN111794702A CN202010688582.2A CN202010688582A CN111794702A CN 111794702 A CN111794702 A CN 111794702A CN 202010688582 A CN202010688582 A CN 202010688582A CN 111794702 A CN111794702 A CN 111794702A
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- slurry
- spring
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- 238000007872 degassing Methods 0.000 title claims abstract description 117
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000007599 discharging Methods 0.000 claims abstract description 8
- 239000002002 slurry Substances 0.000 claims description 113
- 238000007789 sealing Methods 0.000 claims description 31
- 239000000945 filler Substances 0.000 claims description 11
- 239000002912 waste gas Substances 0.000 abstract description 39
- 239000007789 gas Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 29
- 238000005553 drilling Methods 0.000 description 15
- 230000005484 gravity Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 239000004744 fabric Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011440 grout Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/065—Separating solids from drilling fluids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/0005—Degasification of liquids with one or more auxiliary substances
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/06—Arrangements for treating drilling fluids outside the borehole
- E21B21/063—Arrangements for treating drilling fluids outside the borehole by separating components
- E21B21/067—Separating gases from drilling fluids
Abstract
The utility model relates to a degassing vibrating screen, relate to mud treatment facility technical field, it includes the shale shaker and sets up in the gas removal equipment of shale shaker below, gas removal equipment includes the degasification storehouse, it is provided with into thick liquid pipe and exhaust tube to remove the gas storehouse upside, it is connected with the lower floor's discharging pipe of shale shaker to advance thick liquid pipe, the exhaust tube is kept away from degasification storehouse one end and is provided with high-pressure positive blower, high-pressure positive blower's air inlet and exhaust tube intercommunication, be provided with dewatering mechanism on the exhaust tube between high-pressure positive blower and the degasification storehouse, be provided with out thick liquid mechanism on the degasification storehouse diapire, it includes to establish with the inner tube and the cover that remove the gas storehouse inner chamber intercommunication and the outer tube outside the inner tube to go out thick liquid mechanism, the play dressing trough has been seted up on the inner tube lateral wall, be provided with the jam in the inner tube. This application has the effect that reduces the pollution that waste gas loss caused the construction environment among the mud circulation process.
Description
Technical Field
The application relates to the technical field of mud treatment equipment, in particular to a degassing vibrating screen.
Background
Currently, during the production and drilling of oil and gas, a large amount of drilling mud is produced. Due to the fact that the variety of chemical treatment agents used in the drilling process is large, pollution harmful substances such as high COD (chemical oxygen demand) of waste drilling mud, deep chroma, high pH value, a large amount of heavy metal ions and the like seriously exceed the standard. Waste drilling mud is one of the main sources of pollution for the oil and gas industry. In order to reduce the pollution caused by the drilling mud and the drilling cost, the drilling mud is generally recycled.
In addition to solid sediments such as mud, sand and crushed stone, the mud pumped from the well is usually immersed in bubbles, and underground toxic gases may be wrapped in the bubbles, so that when the drilling mud is reused, the mud needs to be filtered to remove solid impurities, and the waste gas content in the mud needs to be reduced through a degassing process. On one hand, the proportion of the slurry is recovered by removing the waste gas, the viscosity performance of the slurry is stabilized, and the possibility of well blowout during the recycling of the slurry is reduced; on the other hand, the damage of toxic gas to the bodies of constructors in the mud circulation process is avoided.
The Chinese application document with the bulletin number of CN110130844A discloses a vibrating screen for drilling mud, including processing storehouse, the top cap, vibrating device, the screen cloth, the funnel, the outer loop, compression spring, prevent the windrow device, the honeycomb duct, drainage tube and base, the top cover of processing storehouse is equipped with the top cap, and the middle part of processing storehouse inner chamber is equipped with vibrating device, the screen cloth is installed on vibrating device's top, and the bottom cover of processing storehouse inner chamber is equipped with the funnel, the outside of funnel is equipped with the outer loop, and the bottom of processing storehouse inner chamber is connected through the compression spring transmission with the top of outer loop, the inboard of processing storehouse bottom is equipped with prevents the windrow device, and the honeycomb duct is installed to one side at processing storehouse top, the middle part of funnel bottom is equipped with the drainage tube. The vibrating device comprises a fixed cover, a cylinder, a conical spring and a sleeve, the fixed cover is located in the middle of an inner cavity of the processing bin, the cylinder is arranged at the bottom of the inner cavity of the fixed cover, the conical spring is sleeved on the outer side of the top of the cylinder, the sleeve is sleeved on the outer side of the top of the cylinder, and the outer side of the bottom of the sleeve is in transmission connection with the top end of the cylinder through the conical spring. The transmission shaft, change piece, fixed plate and motor, and the transmission shaft is located the bottom of processing storehouse inner chamber, and one side of transmission shaft inner chamber is equipped with the commentaries on classics piece, and changes the piece and be the bottom of cross distribution at the processing storehouse inner wall, and the fixed plate is installed to one side of processing storehouse inner chamber bottom, and the motor is installed on the top of fixed plate.
During the use, at first open the top cap, secondly start vibrating device and prevent windrow device, then pour mud on the top of screen cloth, make vibrating device drive the screen cloth and carry out vertical and transverse vibration, make the little particulate matter in the mud pass through the screen cloth space and get into the funnel, change the piece and adopt the motor to drive, can make four commentaries on classics pieces beat the outer wall of funnel simultaneously, make accumulational mud in funnel top can be prevented windrow device vibration landing, discharge from one side of drainage tube bottom at last, can.
In view of the above-mentioned related technologies, in the subsequent treatment process of the slurry passing through the vibrating screen, the slurry flows along with the slurry, the bubbles in the slurry are broken, and the waste gas in the slurry is dissipated to the working environment.
Disclosure of Invention
In order to reduce the pollution that waste gas loss caused the construction environment among the mud circulation process, this application provides a degasification shale shaker.
The application provides a degassing shale shaker adopts following technical scheme:
a degassing vibrating screen comprises a vibrating screen and a degassing device arranged below the vibrating screen, wherein the degassing device comprises a degassing bin, a slurry inlet pipe and an exhaust pipe are arranged on the upper side of the degassing bin, the slurry inlet pipe is connected with a lower-layer discharge port of the vibrating screen, one end, far away from the degassing bin, of the exhaust pipe is provided with a high-pressure fan, an air inlet of the high-pressure fan is communicated with the exhaust pipe, a dewatering mechanism is arranged on the exhaust pipe between the high-pressure fan and the degassing bin, a slurry outlet mechanism is arranged on the bottom wall of the degassing bin, the slurry outlet mechanism comprises an inner pipe communicated with an inner cavity of the degassing bin, an outer pipe arranged outside the inner pipe and a slurry outlet groove are formed in the side wall of the inner pipe, a blockage capable of plugging the slurry outlet groove is arranged in the inner pipe, the blockage is in sliding connection with the inner pipe, and a first spring is arranged between the, and the first spring is arranged on one side of the plug, which is far away from the inner cavity of the degassing bin.
By adopting the technical scheme, the high-pressure fan and the vibrating screen are adjusted to be started, and the high-pressure fan is used for exhausting air from the degassing bin, so that the inside of the degassing bin is in a negative pressure environment; introducing the drilling mud pumped out from the underground into a vibrating screen for vibrating screen, discharging solid sediments such as mud, sand, broken stones and the like brought out from the underground by the drilling mud through an upper layer discharge hole of the vibrating screen, allowing the filtered mud to flow into a mud inlet pipe through a lower layer discharge pipe of the vibrating screen, and allowing the mud to flow into a degassing bin through the mud inlet pipe under the action of gravity; waste gas in the slurry is accelerated to escape into the air under the negative pressure environment in the degassing bin, the waste gas escaping into the dedusting bin is pumped into the exhaust pipe under the action of the high-pressure fan and flows towards the direction close to the high-pressure fan along the exhaust pipe, moisture in the waste gas is removed through the dewatering mechanism in the flowing process, and then the waste gas is sent into a gas pipeline for conveying the waste gas through the high-pressure fan and is sent into a waste gas treatment device for treatment; the slurry in the degassing bin is gradually accumulated, in the slurry accumulation process, the pressure of the slurry on the blockage is gradually increased, so that the first spring is gradually contracted, the blockage descends along the inner pipe and descends along with the blockage, the blockage does not completely block the slurry outlet groove any more, the degassing bin is communicated with the inner cavity of the outer pipe through the slurry outlet groove, and the slurry in the degassing bin flows into the outer pipe through the slurry outlet groove and then flows to the next procedure through the outer pipe for treatment; the designed degassing device is used for degassing the slurry filtered by the vibrating screen, accelerating the escape speed of waste gas in the slurry through a negative pressure environment, collecting and conveying the escaped waste gas, reducing the amount of the waste gas escaped to a working environment and further achieving the purpose of reducing the pollution of the waste gas in the slurry to the working environment; the designed slurry outlet mechanism is matched with the first spring to block the inner pipe through the block, so that the dust removal bin can conveniently form a negative pressure environment, and simultaneously, the slurry is not influenced to be discharged from the dust removal bin, and the structure is simple, convenient and practical; the dewatering mechanism of design dehumidifies waste gas before waste gas gets into high pressure positive blower, reduces the water content in the waste gas, avoids the waste gas water content too high to cause high pressure positive blower trouble.
Preferably, the dewatering mechanism include with the hydroecium that the exhaust tube communicates, be provided with the grid board in the hydroecium, the grid board will the hydroecium is separated for last cavity and lower cavity, the interior heap of last cavity is equipped with the filler, be provided with the drain pipe on the cavity down, be provided with the control valve on the drain pipe.
By adopting the technical scheme, the waste gas is introduced into the upper cavity under the action of the high-pressure fan and flows towards the direction close to the high-pressure fan through the gap between the fillers, in the flowing process of the waste gas, the water vapor in the waste gas is contacted with the surface of the fillers and condensed and gathered on the surface of the fillers, so that the water content in the waste gas is reduced, the water vapor is condensed into water drops and then flows downwards under the action of gravity, flows into the lower cavity through the grating plate for temporary storage, and the control valve is periodically opened to discharge the condensed water in the lower cavity; the water removal mechanism of design, the water content in the waste gas is reduced through the natural condensation of waste gas steam when packing, simple structure, and need not the extra energy of consuming, energy-concerving and environment-protective, convenient and practical.
Preferably, the slurry inlet pipe is connected with a lower layer discharge pipe of the vibrating screen through a flexible pipe.
Through adopting above-mentioned technical scheme, the flexible pipe of design absorbs the vibration of shale shaker during operation for the lower floor's discharging pipe of shale shaker with advance the connection between the thick liquid pipe more firm, reduce the lower floor's discharging pipe of shale shaker and advance the junction of thick liquid pipe and take place the possibility of leaking, reduce degasification shale shaker trouble probability, promote the usability.
Preferably, one side, far away from the degassing bin, of the inner wall of the inner pipe is provided with a limiting table, when the plug abuts against the limiting table, the length of the first spring is not less than the length of the first spring compressed to the working limit load, and at the moment, the plug is separated from the slurry outlet groove.
Through adopting above-mentioned technical scheme, the stopper of design protects first spring, avoids intaking in the gas storehouse and leads to blockking up the situation emergence of excessively extrudeing first spring too fast, avoids first spring impaired, guarantees the life of first spring.
Preferably, the side wall of the blockage close to one side of the degassing bin is protruded to form an arc surface.
Through adopting above-mentioned technical scheme, the lateral wall that will block up and be close to the degasification storehouse designs into the bellied cambered surface that makes progress for mud striking is blockked up and is sputtered around to, and the mud of being convenient for is discharged from the stock discharge groove, has promoted mud discharge efficiency, convenient and practical.
Preferably, it is provided with the fixed station to correspond into thick liquid pipe in the degasification storehouse, the fixed station pass through the connecting rod with degasification storehouse inner wall connection, be provided with between the fixed station and the play thick liquid mouth that advances thick liquid pipe and seal the boss, it is greater than to seal the boss diameter advance thick liquid intraductal diameter, it is provided with the second spring to seal between boss and the fixed station, the second spring makes it tends to be close to seal the boss advance the play thick liquid mouth direction of thick liquid pipe and remove.
By adopting the technical scheme, after the degassing vibrating screen is used, slurry enters the slurry inlet pipe and is blocked by the sealing boss, the slurry is accumulated in the slurry inlet pipe, the pressure applied to the sealing boss is gradually increased along with the accumulation of the slurry, when the slurry in the slurry inlet pipe is accumulated to a certain amount, the supporting force applied to the sealing boss by the second spring is smaller than the pressure applied to the sealing boss by the slurry and the gravity of the sealing boss, the sealing boss descends, the second spring contracts, the slurry inlet pipe is communicated with the inner cavity of the degassing bin, and the slurry enters the degassing bin; the designed second spring and the sealing boss block the slurry inlet pipe when no slurry or less slurry exists in the slurry inlet pipe, so that a negative pressure environment is formed in the degassing bin conveniently, and the slurry is impacted with the sealing boss when entering the degassing bin, so that the slurry is sputtered and dispersed, gas in the slurry is conveniently escaped, and the degassing quality and the degassing efficiency are improved; simultaneously, seal the boss in the mud extrusion for advance the thick liquid pipe and when the degasification storehouse communicates, carry out the elasticity according to advancing the thick liquid volume in real time to the clearance size between the play thick liquid mouth that seals the boss and advance the thick liquid pipe and adjust, realize the regulation to advancing the thick liquid speed, and make advance the thick liquid intraductal mud can realize dynamic liquid seal to advancing the thick liquid pipe, guarantee the negative pressure environment in the degasification storehouse, simple structure, convenient and practical.
Preferably, the fixed station is close to be provided with the stopper on the lateral wall of the boss of sealing, the stopper is followed the length of second spring flexible direction is greater than the length of second spring compression under the working limit load.
Through adopting above-mentioned technical scheme, the stopper of design protects the second spring, avoids intaking in the degasification storehouse and leads to sealing the situation emergence that the boss excessively extrudeed the second spring too fast, avoids the second spring impaired, guarantees the life of second spring.
Preferably, the side wall of the sealing boss close to the slurry inlet pipe is rotatably connected with a propeller, the propeller is arranged right opposite to a slurry outlet of the slurry inlet pipe, and the diameter of a rotating area of the propeller is smaller than the inner diameter of the slurry inlet pipe.
By adopting the technical scheme, when slurry enters the degassing bin through the slurry inlet pipe, the propeller is driven to rotate, and the slurry close to the propeller is thrown away in the rotating process of the propeller; the screw of design disperses mud, and the waste gas in the mud of being convenient for scatters, has promoted degassing quality and degasification efficiency, convenient and practical.
Preferably, be provided with the guide bar on the fixed station, the guide bar is followed advance the axis direction setting of thick liquid pipe grout outlet, just the guide bar is close to into thick liquid pipe one end set up in advance the thick liquid outside of managing, seal and seted up the confession on the boss the through-hole that the guide bar was pegged graft.
Through adopting above-mentioned technical scheme, the guide bar of design leads to sealing the boss lift, avoids sealing the boss and removes the in-process and take place the incline, and leads to the screw and advance thick liquid pipe to bump, seals the boss even and can't take place the condition of shutoff to advancing thick liquid pipe, ensures to seal the boss and can normal use.
Preferably, a filter screen is installed on an air inlet of the air exhaust pipe.
Through adopting above-mentioned technical scheme, the filter screen of design avoids mud to splash into the exhaust tube, guarantees that the exhaust tube is unblocked, and then ensures that the degasification storehouse can normal use, reduces the degasification shale shaker and maintains frequency, resources are saved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the designed degassing device is used for degassing the slurry filtered by the vibrating screen, accelerating the escape speed of gas in the slurry through a negative pressure environment, collecting and conveying the escaped gas, reducing the amount of the gas escaped to a working environment and further achieving the purpose of reducing the pollution of the gas in the slurry to the working environment; the designed slurry outlet mechanism is matched with the first spring to block the inner pipe through the block, so that the dust removal bin can conveniently form a negative pressure environment, and simultaneously, the slurry is not influenced to be discharged from the dust removal bin, and the structure is simple, convenient and practical; the designed water removal mechanism is used for dehumidifying the gas before the gas enters the high-pressure fan, so that the water content in the gas is reduced, and the high-pressure fan fault caused by overhigh water content of the gas is avoided;
2. the designed water removal mechanism reduces the water content in the waste gas through the natural condensation of water vapor when the waste gas passes through the filler, has a simple structure, does not need to additionally consume energy, is energy-saving and environment-friendly, and is convenient and practical;
3. the designed second spring and the sealing boss block the slurry inlet pipe when no slurry or less slurry exists in the slurry inlet pipe, so that a negative pressure environment is formed in the degassing bin conveniently, and the slurry is impacted with the sealing boss when entering the degassing bin, so that the slurry is sputtered and dispersed, gas in the slurry is conveniently escaped, and the degassing quality and the degassing efficiency are improved; meanwhile, when the slurry extrudes the sealing boss, so that the slurry inlet pipe is communicated with the degassing bin, the size of a gap between the sealing boss and a slurry outlet of the slurry inlet pipe is elastically adjusted in real time according to the slurry inlet amount, the slurry inlet speed is adjusted, the slurry in the slurry inlet pipe can be dynamically sealed by liquid, the negative pressure environment in the degassing bin is ensured, and the structure is simple, convenient and practical;
4. the screw of design disperses mud, and the waste gas in the mud of being convenient for scatters, has promoted degassing quality and degasification efficiency, convenient and practical.
Drawings
FIG. 1 is a schematic view of the overall mechanism of the degassing shaker of the present application.
Fig. 2 is a schematic sectional view taken along a-a in fig. 1.
Fig. 3 is an enlarged schematic view of a portion B in fig. 2.
Fig. 4 is an enlarged schematic view of a portion C in fig. 2.
Description of reference numerals: 1. vibrating screen; 2. a degassing device; 21. a degassing bin; 211. a pulp inlet pipe; 212. an air exhaust pipe; 2121. a high pressure fan; 2122. filtering with a screen; 3. a water removal mechanism; 31. a water removing chamber; 311. a grid plate; 312. an upper chamber; 3121. a filler; 313. a lower chamber; 3131. a drain pipe; 3132. a control valve; 4. a pulp outlet mechanism; 41. an inner tube; 411. a slurry outlet groove; 412. blocking; 413. a first spring; 414. a limiting table; 42. an outer tube; 5. a flexible tube; 6. a fixed table; 61. a connecting rod; 62. a guide bar; 63. sealing bosses; 631. a through hole; 632. a propeller; 64. a second spring; 65. and a limiting block.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a degassing vibrating screen. Referring to fig. 1, the degassing vibrating screen comprises a frame, a vibrating screen 1 and a degassing device 2 are mounted above the frame, and the degassing device 2 is mounted below the vibrating screen 1.
Referring to fig. 1 and 2, the degassing device 2 includes a degassing bin 21, a slurry inlet pipe 211 is installed on the top wall of the degassing bin 21, the slurry inlet pipe 211 is connected with the lower discharging pipe of the vibrating screen 1 through a flexible pipe 5, in this embodiment, the flexible pipe 5 is a corrugated pipe, and two ends of the corrugated pipe are respectively connected with the slurry inlet pipe 211 and the lower discharging pipe of the vibrating screen 1 through flanges. The bottom wall of the degassing bin 21 is provided with a slurry outlet mechanism 4. An exhaust pipe 212 is installed on one side, close to the vibrating screen 1, of the side wall of the degassing bin 21, a filter screen 2122 is installed on an air inlet of the exhaust pipe 212, a high-pressure fan 2121 is installed at one end, far away from the degassing bin 21, of the exhaust pipe 212, an air inlet of the high-pressure fan 2121 is communicated with the exhaust pipe 212, and an air outlet of the high-pressure fan 2121 is used for being connected with an air pipeline for conveying waste gas. The water removing mechanism 3 is arranged on the air exhaust pipe 212 between the high pressure fan 2121 and the air removing bin 21.
Referring to fig. 2, the water removing mechanism 3 includes a water removing chamber 31 communicated with the air exhaust pipe 212, a grid plate 311 is welded in the water removing chamber 31, the water removing chamber 31 is divided into an upper chamber 312 and a lower chamber 313 by the grid plate 311, and a filler 3121 is stacked in the upper chamber 312. A drain 3131 is installed on the bottom wall of the lower chamber 313, and a control valve 3132 is installed on the drain 3131.
Referring to fig. 3, the slurry outlet mechanism 4 includes an inner tube 41 communicating with the inner cavity of the degassing chamber 21 and an outer tube 42 covering the inner tube 41. An outer pipe 42 is welded to the bottom wall of the degassing vessel 21 for connection to a circulation pipe for transporting the slurry. A plurality of grout outlet slots 411 are arranged on the side wall of the inner pipe 41 at intervals along the circumferential direction, a mounting seat is welded on one side, away from the degassing bin 21, of the inner cavity of the inner pipe 41, a first spring 413 is mounted on the mounting seat, one side, close to the degassing bin 21, of the first spring 413 is hung and connected with a plug 412 capable of plugging the grout outlet slots 411, the plug 412 is connected with the inner pipe 41 in a sliding mode, and the side wall, close to one side of the degassing bin 21, of the plug 412 is protruded to form an arc surface. The inner wall of the inner pipe 41 is welded with a limit table 414 which is arranged in an annular mode, the plug 412 is separated from the slurry outlet slot 411 when the plug 412 abuts against the limit table 414, and the length of the first spring 413 is not less than the length of the first spring 413 compressed to the working limit load.
Referring to fig. 4, in order to facilitate the formation of a negative pressure environment in the degassing bin 21, a fixing table 6 is arranged in the degassing bin 21 corresponding to the slurry inlet pipe 211, the fixing table 6 is connected with the inner wall of the degassing bin 21 through a connecting rod 61, and the connecting rod 61 is welded and fixed with the fixing table 6 and the inner wall of the degassing bin 21. The second spring 64 is clamped on the top wall of the fixed table 6, one end, far away from the fixed table 6, of the second spring 64 is hung with the sealing boss 63 for plugging the slurry outlet of the slurry inlet pipe 211, the diameter of the sealing boss 63 is larger than the inner diameter of the slurry inlet pipe 211, and the second spring 64 enables the sealing boss 63 to tend to move towards the direction of the slurry outlet close to the slurry inlet pipe 211. The side wall of the sealing boss 63 close to the pulp inlet pipe 211 is rotatably connected with a propeller 632, the propeller 632 is arranged right opposite to the pulp outlet of the pulp inlet pipe 211, and the diameter of the rotating area of the propeller 632 is smaller than the inner diameter of the pulp inlet pipe 211.
Referring to fig. 4, in order to avoid the second spring 64 from being compressed excessively, a limit block 65 is welded on the side wall of the fixing table 6 close to the sealing boss 63, and the length of the limit block 65 along the extension and contraction direction of the second spring 64 is greater than the length of the second spring 64 compressed to the working limit load.
Referring to fig. 4, in order to avoid the sealing boss 63 from deviating relative to the slurry outlet of the slurry inlet pipe 211 during the movement process, a guide rod 62 is further welded on the side wall of the fixed platform 6 close to the sealing boss 63, the guide rod 62 is arranged along the axial direction of the slurry outlet of the slurry inlet pipe 211, one end of the guide rod 62 close to the slurry inlet pipe 211 is arranged outside the slurry inlet pipe 211, and a through hole 631 for the guide rod 62 to be inserted is formed in the sealing boss 63.
The implementation principle of the degassing vibrating screen in the embodiment of the application is as follows: before the drilling mud is processed, the high-pressure fan 2121 and the vibrating screen 1 are adjusted to be started, and the high-pressure fan 2121 is used for exhausting air to the degassing bin 21, so that the interior of the degassing bin 21 is in a negative pressure environment.
And (2) introducing the drilling mud pumped out from the underground into the vibrating screen 1 for vibrating screen, so that solid sediments such as mud, sand, broken stones and the like brought out from the underground through the drilling mud are discharged through an upper layer discharge hole of the vibrating screen 1 and are collected. The filtered slurry flows into the slurry inlet pipe 211 through the lower discharge pipe of the vibrating screen 1 under the action of gravity.
The mud that flows into thick liquid pipe 211 is blocked by sealing boss 63, gather in advancing thick liquid pipe 211, gather along with the mud, the pressure that seals boss 63 and receive increases gradually, after the thick liquid accumulates to a certain amount in advancing thick liquid pipe 211, the holding power that second spring 64 applyed on sealing boss 63 is less than the pressure that the thick liquid applyed on sealing boss 63 and seals boss 63 self gravity, it descends to seal boss 63, second spring 64 contracts, it communicates with degasification storehouse 21 inner chamber to advance thick liquid pipe 211, the thick liquid gets into degasification storehouse 21. When entering the degassing bin 21 through the slurry inlet pipe 211, the slurry collides with the sealing boss 63 and the propeller 632 and splashes around, and meanwhile, the slurry drives the propeller 632 to rotate, and the slurry close to the propeller 632 is thrown away in the rotating process of the propeller 632.
After the slurry enters the degassing bin 21, the waste gas in the slurry is accelerated to escape into the air under the negative pressure environment in the degassing bin 21, the waste gas escaping into the dedusting bin is pumped into the exhaust pipe under the action of the high-pressure fan 2121 and flows towards the direction close to the high-pressure fan 2121 along the exhaust pipe, the waste gas is introduced into the dewatering chamber 31 under the action of the high-pressure fan 2121 and flows towards the direction close to the high-pressure fan 2121 through gaps between the fillers 3121, during the flowing process of the waste gas, water vapor in the waste gas is contacted with the surfaces of the fillers 3121 and condensed and converged on the surfaces of the fillers 3121, so that the water content in the waste gas is reduced, the water vapor is condensed into water drops and flows downwards under the action of gravity, the water drops flow into the lower chamber 313 through the grating plate 311 for temporary storage, the control valve 3132 is periodically opened, and the condensed water in; the waste gas in the water removing chamber 31 is sent to a gas pipeline for conveying the waste gas through the high pressure fan 2121, and then sent to a waste gas treatment device along the conveying pipeline for treatment.
Along with the gradual accumulation of the slurry in the degassing bin 21, the pressure of the slurry on the plug 412 is gradually increased, so that the first spring 413 is gradually contracted, the plug 412 descends along the inner pipe 41, along with the descending of the plug 412, the plug 412 does not completely plug the slurry outlet slot 411 any more, the degassing bin 21 is communicated with the inner cavity of the outer pipe 42 through the slurry outlet slot 411, the slurry in the degassing bin 21 flows into the outer pipe 42 through the slurry outlet slot 411, and then flows to the next process through the outer pipe 42 for treatment.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A degassing shale shaker which characterized in that: comprises a vibrating screen (1) and a degassing device (2) arranged below the vibrating screen (1), wherein the degassing device (2) comprises a degassing bin (21), a slurry inlet pipe (211) and an air exhaust pipe (212) are arranged on the upper side of the degassing bin (21), the slurry inlet pipe (211) is connected with a lower discharging pipe of the vibrating screen (1), one end, far away from the degassing bin (21), of the air exhaust pipe (212) is provided with a high-pressure fan (2121), an air inlet of the high-pressure fan (2121) is communicated with the air exhaust pipe (212), a dewatering mechanism (3) is arranged on the air exhaust pipe (212) between the high-pressure fan (2121) and the degassing bin (21), a slurry outlet mechanism (4) is arranged on the bottom wall of the degassing bin (21), the slurry outlet mechanism (4) comprises an inner pipe (41) communicated with the inner cavity of the degassing bin (21) and an outer pipe (42) sleeved with the inner pipe (41), offer out thick liquid groove (411) on inner tube (41) lateral wall, be provided with in inner tube (41) can right go out thick liquid groove (411) and carry out jam (412) of shutoff, jam (412) with inner tube (41) sliding connection, jam (412) with be provided with first spring (413) between inner tube (41), just first spring (413) set up in jam (412) keep away from degasification storehouse (21) inner chamber one side.
2. The degassing vibratory screen of claim 1, wherein: dewatering mechanism (3) include with dewatering chamber (31) of exhaust tube (212) intercommunication, be provided with grid board (311) in dewatering chamber (31), grid board (311) will dewatering chamber (31) are separated for last cavity (312) and lower cavity (313), it is equipped with filler (3121) to go up the interior heap of cavity (312), be provided with drain pipe (3131) down on cavity (313), be provided with control valve (3132) on drain pipe (3131).
3. The degassing vibratory screen of claim 1, wherein: the slurry inlet pipe (211) is connected with a lower discharging pipe of the vibrating screen (1) through a flexible pipe (5).
4. The degassing vibratory screen of claim 1, wherein: one side, far away from the degassing bin (21), of the inner wall of the inner pipe (41) is provided with a limiting table (414), when the plug (412) abuts against the limiting table (414), the length of the first spring (413) is not smaller than the length of the first spring (413) compressed to the working limit load, and at the moment, the plug (412) is separated from the slurry outlet groove (411).
5. The degassing vibratory screen of claim 1, wherein: the side wall of the plug (412) close to one side of the degassing bin (21) is raised to form an arc surface.
6. The degassing vibratory screen of claim 1, wherein: it is provided with fixed station (6) to correspond into thick liquid pipe (211) in degasification storehouse (21), fixed station (6) through connecting rod (61) with degasification storehouse (21) inner wall connection, be provided with between fixed station (6) and the play thick liquid mouth of advancing thick liquid pipe (211) and seal boss (63), it is greater than to seal boss (63) diameter advance thick liquid pipe (211) internal diameter, it is provided with second spring (64) to seal between boss (63) and fixed station (6), second spring (64) make it tends to be close to seal boss (63) advance the play thick liquid mouth direction removal of thick liquid pipe (211).
7. The degassing vibratory screen of claim 6, wherein: the fixed station (6) is close to be provided with stopper (65) on the lateral wall of sealing boss (63), stopper (65) are followed the length of the flexible direction of second spring (64) is greater than second spring (64) compresses to the length under the working limit load.
8. The degassing vibratory screen of claim 6, wherein: seal boss (63) and be close to it is connected with screw propeller (632) to rotate on advancing the lateral wall of thick liquid pipe (211), screw propeller (632) are just right advance the play thick liquid mouth setting of thick liquid pipe (211), just screw propeller (632) rotate regional diameter and be less than advance thick liquid pipe (211) internal diameter.
9. The degassing vibratory screen of claim 8, wherein: be provided with guide bar (62) on fixed station (6), guide bar (62) are followed advance thick liquid pipe (211) play thick liquid mouthful axis direction setting, just guide bar (62) are close to advance thick liquid pipe (211) one end set up in advance the thick liquid pipe (211) outside, seal and seted up the confession on boss (63) through-hole (631) that guide bar (62) were pegged graft.
10. The degassing vibratory screen of claim 1, wherein: and a filter screen (2122) is arranged on an air inlet of the air exhaust pipe (212).
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| CN116752917A (en) * | 2023-08-17 | 2023-09-15 | 河南中正石油起重机械有限公司 | Negative pressure shale shaker for well drilling |
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| CN111794702B (en) | 2022-03-29 |
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Denomination of invention: A deaeration vibrating screen Granted publication date: 20220329 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: Shaanxi Aishu Machinery Manufacturing Co.,Ltd. Registration number: Y2024980010761 |