CN108126834B - Dewatering, deoiling and deslagging three-phase horizontal spiral sedimentation centrifuge - Google Patents
Dewatering, deoiling and deslagging three-phase horizontal spiral sedimentation centrifuge Download PDFInfo
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- CN108126834B CN108126834B CN201711414631.8A CN201711414631A CN108126834B CN 108126834 B CN108126834 B CN 108126834B CN 201711414631 A CN201711414631 A CN 201711414631A CN 108126834 B CN108126834 B CN 108126834B
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- 238000004062 sedimentation Methods 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 238000005238 degreasing Methods 0.000 claims abstract description 15
- 239000004576 sand Substances 0.000 claims abstract description 15
- 239000002893 slag Substances 0.000 claims description 15
- 239000007787 solid Substances 0.000 claims description 12
- 230000004323 axial length Effects 0.000 claims description 4
- 238000000926 separation method Methods 0.000 abstract description 14
- 239000000571 coke Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 10
- 238000007670 refining Methods 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 78
- 239000012071 phase Substances 0.000 description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 239000007790 solid phase Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000012028 Fenton's reagent Substances 0.000 description 1
- 208000016285 Movement disease Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005235 decoking Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B7/00—Elements of centrifuges
- B04B7/08—Rotary bowls
- B04B7/12—Inserts, e.g. armouring plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
- B04B1/20—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles discharging solid particles from the bowl by a conveying screw coaxial with the bowl axis and rotating relatively to the bowl
- B04B2001/2083—Configuration of liquid outlets
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- Centrifugal Separators (AREA)
Abstract
A dewatering, degreasing and deslagging three-phase horizontal spiral sedimentation centrifuge belongs to the technical field of oil-water separation in petrochemical industry. 15 vertical plates are welded on the column section and the cone section of the screw conveyor, and large screw blades are welded on the vertical plates. An oil baffle plate with a cone structure is welded at the 3/4 axial distance of the wall surface of the cone section. A cylindrical conical small rotary drum is arranged on the inner end face of the large end flange, 15 small vertical plates are welded on the leftmost end wall face of the spiral conveyor in a circumferential direction in the cylindrical conical small rotary drum, and small spiral blades are welded on the small vertical plates. An annular water guide plate and an annular sand baffle are welded on the inner wall surface of the large end of the rotary drum. The large end of the rotary drum is provided with 12 circular radial water outlets, and the wall surface of the large end flange is provided with 12 circular axial oil outlets. The horizontal spiral sedimentation centrifuge is suitable for separating oilfield produced liquid, separating oil-containing scum and separating cold coke wastewater in oil refining process.
Description
Technical Field
The invention relates to a dewatering, deoiling and deslagging three-phase horizontal spiral sedimentation centrifuge, belonging to the technical field of oil-water separation in petrochemical industry.
Background
With the rapid development of oil refining technology, the delayed coking process becomes one of the main methods for deep processing of heavy oil. The processing technology is that high carbon residue is used as raw material, and crude gasoline, diesel oil and coke are produced by reaction at high temperature. The coke in the coke tower is washed by adopting a hydraulic decoking technology in the production process, and a large amount of coke cooling water is generated in the process. In order to solve the problems, a closed circulation treatment process is adopted for the coke cooling water at present, and the key technology is to separate coke powder, oil and water in a closed space. At present, before air cooling is carried out in actual production, the coke powder and oil are separated out through a cyclone coke powder separator and an oil remover. However, most of the problems do not consider the phenomenon of oil floating of oil and coke powder in the cyclone in the coke cooling water, and the aim of efficiently separating the oil and the coke powder is difficult to achieve by using a cyclone coke remover to connect an oil remover in series. The three-phase horizontal spiral sedimentation centrifuge has wide application prospect in the aspect of coking oil-containing scum treatment.
The separation of the three-phase horizontal spiral sedimentation centrifuge is mainly liquid-solid-liquid separation and liquid-solid separation. The density of the solid phase in the liquid-solid-liquid separation is between the densities of the two liquids, so that the solid-phase slag layer in the liquid pool is in the middle, the light-phase liquid layer is close to the wall of the screw conveyor at the innermost layer, and the heavy-phase liquid layer is close to the wall of the rotary drum at the outermost layer. In the liquid-solid separation, the density of the solid phase is greater than that of the two liquids, so that a light phase liquid layer, a heavy phase liquid layer and a slag layer are sequentially arranged from the wall surface of the screw conveyor to the inner wall surface of the rotary drum.
Patent CN205032289U and patent CN106622687a disclose a liquid-solid-liquid three-phase horizontal spiral decanter centrifuge, which is mainly used for separating medium with solid specific gravity between two liquid phases, but specific application fields are not mentioned, and the structure has certain limitations, and it is not explicitly proposed how to collect the liquid separating structures of the respective pipelines after two liquids are discharged, and the design of the heavy liquid discharge channel is to be further clarified. Patent CN106673401a discloses a method for dewatering oil-containing scum in petrochemical industry, after demulsification of the oil-containing scum, adding Fenton reagent to make oxidation treatment, finally making dewatering treatment of the oil-containing scum in three-phase horizontal spiral sedimentation centrifuge, but the structure of three-phase horizontal spiral sedimentation centrifuge used in the method is not described in this patent, and needs to be further described.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides a dewatering, deoiling and deslagging three-phase horizontal spiral sedimentation centrifuge, which is additionally provided with different structures in a rotary drum and outside the rotary drum, improves the liquid-solid separation effect, and is suitable for separating produced liquid of an oil field, separating scum containing oil and separating cold coke wastewater in an oil refining process.
The technical scheme adopted by the invention is as follows: the three-phase horizontal spiral sedimentation centrifuge comprises a rotary drum, a large spiral blade, a spiral conveyer, a large end flange, a small end flange, a left spiral shaft neck, a right spiral shaft neck and a cycloidal tooth needle differential mechanism, wherein a liquid pool is sequentially provided with a light liquid layer, a heavy liquid layer and a solid sediment layer from inside to outside along the radial position in the rotary drum, the spiral conveyer comprises a spiral conveyer column section and a spiral conveyer cone section, 15 column section vertical plates are welded on the wall surface of the spiral conveyer column section in a circumferential direction, and 15 cone section vertical plates are welded on the wall surface of the spiral conveyer cone section in a circumferential direction; the large spiral blades of the spiral conveyor are welded on the column section vertical plate and the cone section vertical plate; an oil baffle is welded at the 3/4 axial distance of the wall surface of the conical section of the screw conveyor; a column conical small rotary drum is arranged on the inner end face of the large end flange; 15 small vertical plates are welded in the circumferential direction in the cylindrical conical small rotary drum and on the leftmost end wall surface of the screw conveyor, and a gap of 3.0-12mm is formed between the small vertical plates and the tail ends of the vertical plates of the cylindrical section; a small spiral blade is welded on the small vertical plate; an annular water guide plate and an annular sand baffle are welded on the inner wall surface of the large end of the rotary drum; the large end of the rotary drum is provided with 12 circular radial water outlets, and the wall surface of the large end flange is provided with 12 circular axial oil outlets; the column section and the cone section of the screw conveyor are welded into a whole and are respectively connected with the left screw shaft neck and the right screw shaft neck; the left spiral journal and the right spiral journal are respectively supported by bearings arranged in the large end flange and the small end flange; the large end flange and the small end flange are connected with the rotary drum through screws and are supported by bearings in bearing seats at the left end and the right end.
The oil baffle is of a conical structure, and a gap of 2.0-10mm is formed between the oil baffle and the tail end of the conical section vertical plate.
The axial length of the cone section of the small cylindrical cone drum is 1/2 of the length of the cylindrical section of the small cylindrical cone drum.
The small spiral blade has a structure in a cylindrical cone shape corresponding to the cylindrical cone type small rotary drum, and the top gap between the small spiral blade and the cylindrical cone type small rotary drum is 1.0-1.5mm.
The annular water guide plate is provided with 12 elliptical holes which are distributed in an annular direction, and the axial positions of the elliptical holes correspond to the joint of the cylindrical cones of the cylindrical cone type small rotary drum.
The annular sand baffle is axially spaced from the annular water guide plate, and has an annular space with the cylindrical conical small rotary drum.
The radial position of the axial oil outlet is between the inner edge of the small vertical plate and the cylindrical conical small rotary drum, and the diameter of the radial water outlet is 2-3mm larger than that of the axial oil outlet.
The beneficial effects of the invention are as follows: the spiral conveyer of the dewatering, degreasing and deslagging three-phase horizontal spiral sedimentation centrifuge comprises a spiral conveyer column section and a spiral conveyer cone section, 15 column section vertical plates are welded on the wall surface of the spiral conveyer column section in a circumferential direction, 15 cone section vertical plates are welded on the wall surface of the spiral conveyer cone section in a circumferential direction, and large spiral blades of the spiral conveyer are welded on the column section vertical plates and the cone section vertical plates. An oil baffle plate with a conical structure is welded at the 3/4 axial distance of the wall surface of the conical section of the screw conveyor. A cylindrical conical small rotary drum is arranged on the inner end face of the large end flange, 15 small vertical plates are welded on the leftmost end wall face of the spiral conveyor in a circumferential direction in the cylindrical conical small rotary drum, and small spiral blades are welded on the small vertical plates. An annular water guide plate is welded on the inner wall surface of the large end of the rotary drum, and 12 elliptical holes are formed in the annular water guide plate. An annular sand baffle is welded on the inner wall surface of the large end of the rotary drum. The large end of the rotary drum is provided with 12 circular radial water outlets, and the wall surface of the large end flange is provided with 12 circular axial oil outlets. The horizontal spiral sedimentation centrifuge is additionally provided with different structures in the rotary drum and outside the rotary drum, improves the liquid-solid separation effect, and is suitable for separating produced liquid in an oil field, separating scum containing oil and separating cold coke wastewater in an oil refining process.
Drawings
FIG. 1 is a block diagram of a three-phase horizontal spiral decanter centrifuge for dewatering, degreasing and deslagging.
FIG. 2 is an enlarged view of the left half of a three-phase horizontal spiral decanter centrifuge for dewatering, degreasing and deslagging.
FIG. 3 is an enlarged view of the right half of a three-phase horizontal spiral decanter centrifuge for dewatering, degreasing and deslagging.
Fig. 4 is a block diagram of the large end of the drum.
Fig. 5 is a cross-sectional view A-A of fig. 4 (annular deflector position).
Fig. 6 is a general assembly diagram of a three-phase horizontal screw decanter centrifuge.
In the figure: 1. drum, 2, big helical blade, 2a, screw conveyer column section, 2b, screw conveyer cone section, 3, big end flange, 4, small end flange, 5, left helical journal, 6, right helical journal, 7, cycloidal tooth needle differential, 8, column section riser, 9, cone section riser, 10, oil baffle, 11, small cylindrical cone drum, 12, small riser, 13, small helical blade, 14, annular water guide plate, 15, oval hole, 16, annular sand baffle, 17, radial water outlet, 18, axial oil outlet, 19, drainage channel, 20, oil discharge channel, 21, sand discharge channel.
Detailed Description
The following detailed description of the invention refers to the accompanying drawings,
fig. 1, 2, 3, 4 and 5 show the structure diagram of a dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge. In the figure, the dewatering, degreasing and deslagging three-phase horizontal spiral sedimentation centrifuge comprises a rotary drum 1, a large spiral blade 2, a spiral conveyer, a large end flange 3, a small end flange 4, a left spiral shaft neck 5, a right spiral shaft neck 6 and a cycloidal tooth needle differential mechanism 7, wherein a liquid pool is sequentially provided with a light liquid layer, a heavy liquid layer and a solid sediment layer from inside to outside along the radial position in the rotary drum 1. The screw conveyer comprises a screw conveyer column section 2a and a screw conveyer cone section 2b, 15 column section vertical plates 8 are welded on the wall surface of the screw conveyer column section 2a in a circumferential direction, 15 cone section vertical plates 9 are welded on the wall surface of the screw conveyer cone section 2b in a circumferential direction, and large spiral blades 2 of the screw conveyer are welded on the column section vertical plates 8 and the cone section vertical plates 9. An oil baffle plate 10 with a conical structure is welded at the axial distance of 3/4 of the wall surface of the conical section 2b of the screw conveyor, and a gap of 2.0-10mm is formed between the oil baffle plate and the tail end of the conical section vertical plate 9. The inner end face of the large end flange 3 is provided with a cylindrical conical small rotary drum 11, and the axial length of the conical section of the cylindrical conical small rotary drum 11 is 1/2 of the length of the cylindrical section of the cylindrical conical small rotary drum 11. 15 small vertical plates 12 are welded on the leftmost end wall surface of the spiral conveyor in a circumferential direction in the cylindrical conical small rotary drum 11, and a gap of 3.0-12mm is formed between the small vertical plates and the tail ends of the cylindrical section vertical plates 8; the small vertical plate 12 is welded with a small spiral blade 13, the structure of the small spiral blade is in a cylindrical cone shape corresponding to the cylindrical cone type small rotary drum 11, and the top gap between the small spiral blade and the small spiral blade is 1.0-1.5mm. An annular water guide plate 14 is welded on the inner wall surface of the large end of the rotary drum, 12 elliptical holes 15 are formed in the annular water guide plate, the elliptical holes 15 are distributed in an annular mode, and the axial positions of the elliptical holes correspond to the joint of the cylindrical cones of the cylindrical cone type small rotary drum 11. An annular sand baffle 16 is welded on the inner wall surface of the large end of the drum, and is axially spaced from the annular water guide plate 14 and has an annular space with the cylindrical cone-shaped small drum 11. The large end of the rotary drum is provided with 12 circular radial water outlets 17, the wall surface of the flange at the large end is provided with 12 circular axial oil outlets 18, the radial position of the axial oil outlets 18 is between the inner edge of the small vertical plate 12 and the cylindrical conical small rotary drum 11, and the diameter of the radial water outlets 17 is 2-3mm larger than that of the axial oil outlets 18. The screw conveyor column section 2a and the cone section 2b are welded into a whole and are respectively connected with a left screw shaft neck 5 and a right screw shaft neck 6; the left spiral journal 5 and the right spiral journal 6 are respectively supported by bearings arranged in the large end flange 3 and the small end flange 4; the large end flange 3 and the small end flange 4 are connected with the rotary drum 1 through screws and are supported through bearings in bearing seats at the left end and the right end.
By adopting the technical scheme, 15 column section risers 8 are welded on the wall surface of the column section 2a of the screw conveyer in the circumferential direction, 15 cone section risers 9 are welded on the wall surface of the cone section 2b of the screw conveyer in the circumferential direction, and large spiral blades 2 of the screw conveyer are welded on the column section risers 8 and the cone section risers 9. The setting of 15 risers has reduced the sedimentation distance of oil drop in the liquid bath, has increased sedimentation time, is favorable to the separation of oil phase and aqueous phase more. The height of the riser can vary depending on the oil content of the feed.
An oil baffle 10 with a conical structure is welded at the axial distance of 3/4 of the wall surface of the conical section 2b of the screw conveyor, a gap of 2.0-10mm is reserved between the oil baffle 10 and the tail end of the conical section vertical plate 9, and the oil baffle 10 is required to be higher than the conical section vertical plate 9 by a small distance. Compared with an oil baffle plate with a column structure, the structure can effectively prevent oil from moving towards the slag hole direction, so that the solid phase oil content of the slag hole is reduced, and the oil content of the oil outlet is improved.
The inner end face of the large end flange 3 is provided with a cylindrical conical small rotary drum 11, the axial length of the small conical section of the cylindrical conical small rotary drum 11 is 1/2 of the length of the small cylindrical section, meanwhile, the starting end of the large spiral blade 2 is guaranteed to be 'lapped' on the small conical wall surface for a small part, and gaps exist between the two parts due to different rotating speeds. The oil phase and the water phase are separated by the cylindrical small conical rotary drum, the oil phase is migrated and discharged in the direction of the oil outlet in the cylindrical small conical rotary drum 11, and the water phase is moved and discharged in the direction of the water outlet outside the cylindrical small conical rotary drum 11. The liquid pool is divided into two parts by the cylindrical cone-shaped small rotary drum 11, because numerical calculation proves that the horizontal spiral sedimentation centrifuge has poor separation efficiency when only the large end flange is provided with the oil outlet and the water outlet and no other special structure exists, and most oil drops can flow out to the water outlet. And the small cone section is inclined outwards rather than inwards, and the calculation proves that most oil drops move along the 'climbing' of the outer wall of the small cone section towards the water outlet when inclined inwards, so that the oil content of the discharged water is increased. The taper angle of the small cone section can be changed according to the oil content of the feed.
Inside the cylindrical conical small rotary drum 11, 15 small vertical plates 12 are welded on the leftmost end wall surface of the screw conveyor in a circumferential direction, and a gap of 3.0-12mm is formed between the small vertical plates and the tail ends of the cylindrical section vertical plates 8. The height of the small vertical plate is 1/2 of the height of the vertical plate 8 of the right end column section. The arrangement of the small vertical plates enables the oil phase which is separated in the liquid pool of the vertical plate 8 of the right end post section to move continuously and regularly when transiting into the small vertical plate area, so that the movement disorder is avoided, and even the oil layer which is settled is caused to float, thereby affecting the separation efficiency of the oil outlet.
The small vertical plate 12 is welded with a small helical blade 13, the structure of the small helical blade is in a cylindrical cone shape corresponding to the cylindrical cone type small rotary drum 11, and the top gap between the small helical blade and the small helical blade is 1-1.5mm. The pitch of the small spiral blade is 1/3-1/2 of the pitch of the large spiral blade 2, and the small spiral blade 13 is close to the top end of the small cone section of the cylindrical cone-shaped small rotary drum 11 starting from the leftmost end of the small vertical plate 12. The arrangement of the small spiral blades ensures that a part of sediment settled on the wall of the small rotary drum can be smoothly conveyed out without being discharged from the oil discharge port along with accumulation of sediment quantity.
An annular water guide plate 14 is welded on the inner wall surface of the large end of the rotary drum, 12 elliptical holes 15 are formed in the annular water guide plate and distributed in an annular mode, and the axial positions of the annular water guide plate correspond to the joint of the cylindrical cones of the cylindrical cone type small rotary drum 11. The arrangement of the water guide plate enables a small part of oil phase passing along with liquid water to be blocked in the area near the wall surface of the cone section of the small rotary drum by the water guide plate, and meanwhile, the oil phase is extruded back into the oil phase channel by water so as to avoid entering the water phase channel and being discharged along with water. The inner edge of the water guide plate is in sealing connection with the small rotary drum by adopting an O-shaped sealing ring (not shown in the figure), so that oil leakage is avoided.
An annular sand baffle 16 is welded on the inner wall surface of the large end of the rotary drum, and is axially spaced from the water guide plate and has a certain annular space with the cylindrical conical small rotary drum. The top end of the sand baffle should be higher than the inner edge of the oval hole of the water guide plate, so that a small part of oil drops passing through with liquid water can be blocked in the area near the wall surface of the small cone section by the water guide plate, and meanwhile, the oil drops are squeezed back into the oil phase channel by the water so as to avoid entering the water phase channel and being discharged with the water.
The large end of the rotary drum is provided with 12 circular radial water outlets 17, the wall surface of the flange at the large end is provided with 12 circular axial oil outlets 18, the radial positions of the oil outlets are between the inner edge of the small vertical plate and the small rotary drum, the diameter of the water outlets is 2-3mm larger than that of the oil outlets, and the water outlets are arranged at the left end of the annular water guide plate 14 and have axial distances between the two.
The working principle of the dewatering, degreasing and deslagging three-phase horizontal spiral sedimentation centrifuge is as follows: as shown in fig. 2, 3 and 6, under the action of the strong centrifugal force generated by the rotation of the rotary drum, the oil phase is gradually thrown into the channel of the vertical plate 8 of the column section due to the lowest density of the three mixed materials, and further oil-water separation is continued in the area of the vertical plate liquid pool. Gradually moves towards the large end of the rotary drum along the axial direction in the vertical plate channel, then enters the areas of the small vertical plates 12 and the small spiral blades 13, finally is discharged from the axial oil outlet 18, flows into the oil phase channel of the casing, and is discharged from the casing to be collected from the oil phase channel 20 of the casing. When the oil phase passing through the area of the cone-section vertical plate 9 moves to the left end area of the oil baffle plate 10, the oil phase is blocked by the oil baffle plate 10 and is prevented from continuing to move towards the slag hole. The water phase moves to the large end of the rotary drum along the axial direction at the outer layer of the oil phase, firstly enters the annular space between the cylindrical cone-shaped small rotary drum 11 and the annular sand baffle 16, then passes through the elliptical holes 15 on the annular water guide plate 14, finally is discharged from the radial water outlet 17, flows into the water phase channel of the shell, and is discharged from the shell to be collected outside through the shell drainage channel 19. The solid-phase particles are gradually thrown to the wall surface area of the rotary drum 1 along with the rotation of the rotary drum 1 due to the maximum density, and are pushed to the rightmost slag hole to be discharged by the large spiral blade 2 under the action of the rotation speed difference of the rotary drum and the spiral conveyor, and are discharged out of the shell from the shell sand discharge channel 21 to be collected. In the process, the slag layer moving to the wall areas of the annular sand baffle 16 and the rotary drum 1 is blocked by the annular sand baffle 16 to prevent the slag layer from moving towards the water outlet, a part of solid particles are deposited on the wall surface of the cylindrical cone-shaped small rotary drum 11, the solid slag is gradually pushed out by the small spiral blades 13 along the cylindrical cone wall surface of the cylindrical cone-shaped small rotary drum 11 under the action of the rotating speed difference of the cylindrical cone-shaped small rotary drum 11 and the small spiral blades 13 arranged on the small vertical plate 12, then the solid slag is continuously settled in the area near the wall surface of the rotary drum 1, then the large spiral blades 2 which are 'lapped' at the starting end on the wall surface of the small cone section are conveyed to the slag outlet for discharging, and finally the solid slag is conveyed by a cleaning truck for centralized treatment. Thus, the purposes of dewatering an oil outlet, deoiling at a water outlet and deslagging at a slag outlet are achieved, and the separation of oil, water and slag is realized.
Claims (7)
1. The three-phase horizontal spiral sedimentation centrifuge for dewatering, degreasing and deslagging comprises a rotary drum (1), a large spiral blade (2), a spiral conveyer, a large end flange (3), a small end flange (4), a left spiral journal (5), a right spiral journal (6) and a cycloidal tooth needle differential mechanism (7), wherein a light liquid layer, a heavy liquid layer and a solid slag layer are sequentially arranged in the rotary drum (1) from inside to outside along a radial position liquid pool, and the horizontal spiral sedimentation centrifuge is characterized in that the spiral conveyer comprises a spiral conveyer column section (2 a) and a spiral conveyer cone section (2 b), 15 column section vertical plates (8) are welded on the wall surface of the spiral conveyer column section (2 a) in a circumferential direction, and 15 cone section vertical plates (9) are welded on the wall surface of the spiral conveyer cone section (2 b) in a circumferential direction; the large spiral blade (2) of the spiral conveyor is welded on the column section vertical plate (8) and the cone section vertical plate (9); an oil baffle (10) is welded at the axial distance of 3/4 of the wall surface of the spiral conveyor cone section (2 b); a column conical small rotary drum (11) is arranged on the inner end face of the large end flange (3); 15 small vertical plates (12) are welded in the circumferential direction on the leftmost end wall surface of the spiral conveyor inside the cylindrical conical small rotary drum (11), and a gap of 3.0-12mm is formed between the small vertical plates and the tail ends of the cylindrical section vertical plates (8); a small spiral blade (13) is welded on the small vertical plate (12); an annular water guide plate (14) and an annular sand baffle (16) are welded on the inner wall surface of the large end of the rotary drum; the large end of the rotary drum is provided with 12 circular radial water outlets (17), and the wall surface of the large end flange (3) is provided with 12 circular axial oil outlets (18); the screw conveyor column section (2 a) and the cone section (2 b) are welded into a whole and are respectively connected with the left screw shaft neck (5) and the right screw shaft neck (6); the left spiral journal (5) and the right spiral journal (6) are respectively supported by bearings arranged in the large end flange (3) and the small end flange (4); the large end flange (3) and the small end flange (4) are connected with the rotary drum (1) through screws and are supported by bearings in bearing seats at the left end and the right end.
2. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein the oil baffle (10) has a conical structure, and a gap of 2.0-10mm is arranged between the oil baffle and the tail end of the conical section vertical plate (9).
3. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein the axial length of the cone section of the small cylindrical cone drum (11) is 1/2 of the length of the column section of the small cylindrical cone drum (11).
4. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein the small spiral blades (13) are in a cylindrical cone shape corresponding to the cylindrical cone small rotary drum (11), and the top gap between the small spiral blades is 1.0-1.5mm.
5. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein 12 elliptical holes (15) are arranged on the annular water guide plate (14), the elliptical holes (15) are distributed in an annular way, and the axial positions of the elliptical holes correspond to the joint of the cylindrical cones of the cylindrical cone type small rotary drum (11).
6. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein the annular sand baffle (16) is axially spaced from the annular water guide plate (14) and has an annular space with the cylindrical cone-shaped small drum (11).
7. The dewatering, degreasing and deslagging three-phase horizontal spiral decanter centrifuge according to claim 1, wherein the radial position of the axial oil outlet (18) is between the inner edge of the small vertical plate (12) and the cylindrical conical small rotary drum (11), and the diameter of the radial water outlet (17) is 2-3mm larger than the diameter of the axial oil outlet (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| WO2007074076A1 (en) * | 2005-12-22 | 2007-07-05 | Westfalia Separator Gmbh | Screw-type solid bowl centrifuge |
| CN102363137A (en) * | 2011-10-24 | 2012-02-29 | 湘潭离心机有限公司 | Horizontal decanter solid-bowl centrifuge |
| CN103586142A (en) * | 2013-11-15 | 2014-02-19 | 上海普锐通实业有限公司 | Horizontal type spiral sedimentation three-phase separation centrifugal machine |
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| CN205217150U (en) * | 2015-12-20 | 2016-05-11 | 西安科迅机械制造有限公司 | Horizontal helical unloading and depositing centrifuge |
| CN206404919U (en) * | 2016-12-20 | 2017-08-15 | 新疆绿润达农产品加工有限公司 | Horizontal spiral discharge sedimentation centrifuge |
| CN207786831U (en) * | 2017-12-25 | 2018-08-31 | 大连理工大学 | A kind of dehydration, oil removing and deslagging triphase horizontal screw settling centrifuge |
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| WO2007074076A1 (en) * | 2005-12-22 | 2007-07-05 | Westfalia Separator Gmbh | Screw-type solid bowl centrifuge |
| CN102363137A (en) * | 2011-10-24 | 2012-02-29 | 湘潭离心机有限公司 | Horizontal decanter solid-bowl centrifuge |
| CN104084317A (en) * | 2013-08-15 | 2014-10-08 | 飞翼股份有限公司 | Special solid-liquid separator for underground coal mine |
| CN203565209U (en) * | 2013-09-18 | 2014-04-30 | 巨能机械(中国)有限公司 | Three-phase horizontal type helical-conveyer centrifugal with adjustable depth of liquid pool |
| CN103586142A (en) * | 2013-11-15 | 2014-02-19 | 上海普锐通实业有限公司 | Horizontal type spiral sedimentation three-phase separation centrifugal machine |
| CN205217150U (en) * | 2015-12-20 | 2016-05-11 | 西安科迅机械制造有限公司 | Horizontal helical unloading and depositing centrifuge |
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| CN207786831U (en) * | 2017-12-25 | 2018-08-31 | 大连理工大学 | A kind of dehydration, oil removing and deslagging triphase horizontal screw settling centrifuge |
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| CN108126834A (en) | 2018-06-08 |
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