CN210386218U - Compound exhaust structure for horizontal screw centrifuge - Google Patents
Compound exhaust structure for horizontal screw centrifuge Download PDFInfo
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- CN210386218U CN210386218U CN201920796036.3U CN201920796036U CN210386218U CN 210386218 U CN210386218 U CN 210386218U CN 201920796036 U CN201920796036 U CN 201920796036U CN 210386218 U CN210386218 U CN 210386218U
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 56
- 239000007788 liquid Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 4
- 239000007790 solid phase Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000007792 gaseous phase Substances 0.000 abstract description 10
- 208000027418 Wounds and injury Diseases 0.000 abstract description 2
- 230000006378 damage Effects 0.000 abstract description 2
- 208000014674 injury Diseases 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 28
- 239000012071 phase Substances 0.000 description 22
- 230000000694 effects Effects 0.000 description 6
- 238000000926 separation method Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- 239000000706 filtrate Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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Abstract
A compound exhaust structure for a horizontal screw centrifuge comprises a feed pipe, a screw conveyor, a rotary drum, a housing, a differential mechanism, a front main bearing, a screw front bearing, a screw rear bearing and a rear main bearing; the feeding pipe comprises a conical flow passage upper wall surface, a conical flow passage lower wall surface, a straight pipe section and a bent pipe; the spiral conveyor comprises a spiral conveying shaft and a spiral blade; the spiral conveying shaft is a hollow shaft, and a first material distribution chamber and a second material distribution chamber are arranged in the hollow shaft; the root of the first circle of helical blade of the helical blade close to the big end of the rotary drum is provided with fan-shaped holes with the same shape and size, and one blade is fixed in each fan-shaped hole; the utility model discloses can effectively solve the gaseous phase and be detained the problem in the spiral shell centrifuge that crouches, alleviate the corrosivity gaseous phase and cause the injury to equipment.
Description
Technical Field
The utility model belongs to the centrifuge field, concretely relates to spiral shell centrifuge for crouching uses compound exhaust structure.
Background
When a horizontal screw centrifuge is used for processing gas-solid-liquid three-phase materials with large gas content and small solid content, the gas phase separated from the materials to be separated needs to be ensured to be discharged from the spiral flow channel in time. Patent CN204841980U has considered the exhaust problem of horizontal screw centrifuge, has set up the blast pipe on the housing top that is close to the rotary drum overflow mouth position and has discharged the interior gas of housing, and horizontal screw centrifuge only is linked together through overflow mouth and row cinder notch and housing inner chamber, and the inner chamber that forms between horizontal screw centrifuge birotor also has certain hindrance effect for the flow of spiral runner to the gaseous phase, and this patent does not consider from horizontal screw centrifuge inside quickening gaseous phase discharge. When materials containing a large amount of corrosive gas phase are separated, if the gas phase cannot be discharged from the interior of the horizontal screw centrifuge in time, the gas phase is retained in the spiral flow channel, certain corrosion is caused to equipment in the horizontal screw centrifuge, and more serious, the excessive air pressure in the horizontal screw centrifuge can be caused, the sealing effect is reduced, a bearing is corroded, and the operation of the horizontal screw centrifuge is damaged; on the other hand, in the process that the material enters the material distribution chamber from the feeding pipe and enters the rotary drum separation chamber through the material distribution chamber discharge port, the gas phase is mixed in the liquid phase and cannot be discharged, and due to the impact effect of the material on the horizontal screw centrifuge inlet separation area liquid pool, the inlet separation area liquid pool generates a large amount of bubbles which are finally accumulated at the overflow port, and the discharge of filtrate and the gas phase is blocked.
Therefore, in order to improve the separation effect of the gas phase in the horizontal screw centrifuge and accelerate the exhaust speed, certain optimization and improvement must be carried out on the internal structure of the horizontal screw centrifuge.
Disclosure of Invention
In order to solve the spiral shell centrifuge gas phase separation effect that crouches among the prior art poor, the problem that the gaseous phase is detained in the spiral runner, the utility model provides a compound exhaust structure is used to the spiral shell centrifuge crouches.
The above technical problem of the utility model is solved through following technical scheme:
the embodiment of the application provides a compound exhaust structure for a horizontal screw centrifuge, which is characterized in that the horizontal screw centrifuge comprises a feed pipe 1, a screw conveyor 2, a rotary drum 5, a housing 6, a differential mechanism 7, a front main bearing 15, a screw front bearing 16, a screw rear bearing 17 and a rear main bearing 18;
the rotary drum 5 is rotatably arranged in the housing 6, the screw conveyor 2 is rotatably arranged in the rotary drum 5, and the axes of the screw conveyor 2, the rotary drum 5 and the housing 6 are overlapped;
a spiral flow passage is formed between the spiral conveyor 2 and the rotary drum 5; the housing 6 is divided into a left chamber, a middle chamber and a right chamber, the left chamber is communicated with the spiral flow channel through an overflow port 51, and the left chamber is communicated with the outside through a clear liquid outlet 19; the right chamber is communicated with the spiral flow channel through a slag discharge port 52, and is communicated with the outside through a solid phase outlet 20;
the left end of the rotary drum 5 is connected with a driving device in a motor driving mode, the right end of the rotary drum 5 is connected with a differential mechanism 7, an output shaft of the differential mechanism 7 is connected with a spiral conveying shaft 21, and the differential mechanism 7 can ensure that the spiral conveyor 2 and the rotary drum 5 rotate in the same direction at a certain rotation speed difference;
the screw conveyor 2 comprises a screw conveying shaft 21 and a screw blade 22;
the spiral conveying shaft 21 is a hollow shaft, the cylindrical surface of the spiral conveying shaft 21 close to the large end side of the rotary drum 5 is provided with air outlets 31 and discharge outlets 41 which are uniformly distributed in a ring shape, a first material distribution chamber 3 and a second material distribution chamber 4 are arranged in the hollow shaft, the first material distribution chamber 3 is communicated with the spiral flow channel through the air outlets 31, and the second material distribution chamber 4 is communicated with the spiral flow channel through the discharge outlets 41;
preferably, the followingThe spiral blade 22 close to the large end of the rotary drum is the starting point of counting the number of turns of the spiral blade, the axial distance from the air outlet 31 to the overflow port 51 is the pitch of the 1 st turn of the spiral, the shape of the air outlet 31 is square, the number of the air outlet is 8, and the side length is the diameter of the spiral conveying shaft
The discharge hole 41 is arranged between the 4 th spiral;
the root part of the first circle of helical blades of the helical blade 22 close to the large end of the rotary drum is provided with sector holes with the same shape and size, the circle center of each sector hole is positioned on the axis of the helical conveying shaft, and the sector holes are respectively arranged at the positions of 90 degrees, 180 degrees, 270 degrees and 360 degrees of the first circle of helical blades; and a blade c is fixed in each fan-shaped hole.
Preferably, the short arc end of the sector hole coincides with the root of the helical blade 22, the central angle of the sector hole is 10-20 degrees, and the length of the generatrix of the sector hole is the height of the helical blade 22
The blade c is welded in the fan-shaped hole, the outlet edge of the blade c is coincided with the symmetrical line of the fan-shaped hole on the suction surface of the spiral blade 22, the section of the blade c is arc-shaped, the radius of the arc is 30mm, the central angle is 120 degrees, the thicknesses are equal to 2mm, and the included angle between the gas flow speed direction of the inlet edge of the blade c and the axis of the spiral conveyor is 45-60 degrees.
The feeding pipe 1 is concentrically arranged in a cylindrical section of a spiral conveying shaft 21, the feeding pipe 1 is not in contact with the spiral conveying shaft 21, the first material distribution chamber 3 and the second material distribution chamber 4, and the feeding pipe 1 comprises a conical flow channel upper wall surface 11, a conical flow channel lower wall surface 12, a straight pipe section 13 and a bent pipe 14;
the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12 form a conical flow channel, the conical flow channel is communicated with the feeding pipe 1 and the first material distribution chamber 3, and the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12 are positioned in the first material distribution chamber 3; one end of the straight pipe section 13 is connected with an elbow 14, the outlet of the other end is positioned in the second material distribution chamber 4, and the elbow 14 is arranged outside the housing 6;
the inlet end small arc of the conical flow channel upper wall surface 11 is fixed on the straight pipe section 13, the conical flow channel lower wall surface 12 comprises an opening ring 121 and a flow deflector 122, the opening ring 121 is in an omega shape and is fixed in the straight pipe section 13, and the inlet end arc of the flow deflector 122 is connected with the upper arc of the opening ring 121;
as shown in fig. 5, the conical flow passage upper wall surface 11 and the conical flow passage lower wall surface 12 are both 180 ° rotary bodies, and the 0 ° (or 180 °) plane thereof is parallel to the horizontal ground; the axial line of the inlet section of the feeding pipe 1 is vertical to the horizontal ground, and the inlet direction of the material to be separated is the same as the gravity direction;
the bent pipe 14 is a 90-degree bent pipe, and the bending radius of the central line of the bent pipe 14 is 2 times of the diameter of the bent pipe;
preferably, the inclination angle α of the conical surface of the upper wall surface 11 of the conical flow passage is 30-45 degrees, the radius of the circular arc at the inlet of the upper wall surface 11 of the conical flow passage is equal to the radius of the feed pipe 1, the radius of the circular arc at the outlet of the upper wall surface 11 of the conical flow passage is 3 times of the radius of the feed pipe 1, a plurality of circles of air dispersing holes a with the diameter of 3mm are uniformly distributed on the upper wall surface 11 of the conical flow passage in a semi-annular manner, each half circle of air dispersing holes a are arranged at equal intervals, the inclination angle β of the conical surface of the lower wall surface 12 of the conical flow passage is 25-35 degrees, and the radius of
The plane of the outlet arc of the conical flow channel lower wall surface 12 is superposed with the plane of the outlet arc of the conical flow channel upper wall surface 11, and the circle center of the conical flow channel lower wall surface 12 is shifted down by 2mm compared with the circle center o of the conical flow channel upper wall surface 11; and a support rod b is fixed at the center of the circular arcs of the outlet ends of the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12 for reinforcement.
The utility model discloses a theory of operation:
the gas-solid-liquid three-phase material with large gas content to be separated firstly enters the feeding pipe 1, because the bent pipe 14 is arranged at the inlet section, three phases in the material generate certain layered flow under the influence of density difference, most of gas phase with the minimum density flows close to the upper part of the feeding pipe, when the gas phase flows to the position of the first material distribution chamber 3, most of the gas phase enters the conical flow channel formed between the upper wall surface 11 of the conical flow channel and the lower wall surface 12 of the conical flow channel under the guide of the opening ring 121, the gas phase flows above the flow channel, is separated from the solid-liquid phase material and discharged under the guide of the air diffusing holes and enters the spiral flow channel from the air outlet 31, meanwhile, the arc surface and the inclination angle of the lower wall surface 12 of the conical flow channel enable part of the material to flow back into the conical flow channel, the outflow quantity of the solid-liquid phase material in the first material distribution chamber, and enters the spiral flow channel from the discharge port 41 for centrifugal separation;
because the blade c is arranged at the root part of the first circle of the spiral blade 22 close to the large end of the rotary drum and rotates along with the spiral blade 22, the flow guiding effect is achieved on the gas in the spiral flow channel close to the overflow port, the axial flow speed of the gas phase in the spiral flow channel is accelerated, the discharge of the gas phase from the rotary drum is accelerated, and finally the gas phase is discharged from the gas outlet 61.
The beneficial effects of the utility model are embodied in:
the spiral blade of the traditional horizontal screw centrifuge has certain obstruction to the gas phase flow in the spiral flow channel, most of the material distribution chambers are arranged near the middle section of the spiral conveying shaft, and the gas phase is retained after entering the spiral flow channel from the material distribution chambers; the utility model discloses to the gas phase problem of being detained, be equipped with first material ration room 3 being close to a pitch position of rotary drum overflow mouth, guarantee through inlet pipe 1's use that most gaseous phases preferentially get into first material ration room 3 to get into the spiral runner by gas outlet 31, discharge from the overflow mouth under blade c's drive, shortened gaseous phase axial flow's distance, accelerated gaseous phase axial flow speed, reduce gaseous phase exhaust time, alleviate the corrosivity gaseous phase and cause the injury to equipment.
On the other hand, the gas phase in the material to be separated is discharged in advance by arranging the first material distribution chamber 3, so that the bubble amount generated by gas-liquid phase mixing when the material to be separated enters the second material distribution chamber 4 is reduced, the bubbles are prevented from being accumulated at an overflow port, and the smoothness of discharging the filtrate and the gas phase is improved.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of a decanter centrifuge;
FIG. 2 is P of FIG. 11A partial enlarged view;
FIG. 3 is a schematic illustration of a feed tube of an embodiment of a decanter centrifuge;
FIG. 4 is a cross-sectional view of FIG. 3 at section A-A;
FIG. 5 is a front view of FIG. 3 in the direction B;
fig. 6 is a three-dimensional view of a guide vane;
FIG. 7 is a schematic illustration of a screw conveyor of an embodiment of a horizontal decanter centrifuge;
FIG. 8 is P of FIG. 72A partial enlarged view;
fig. 9 is a front view of fig. 7 in the direction C.
The reference numbers indicate 1-feeding pipe, 11-conical flow passage upper wall surface, 12-conical flow passage lower wall surface, 121-opening ring, 122-flow deflector, 13-straight pipe section, 14-bend pipe, 2-screw conveyor, 21-screw conveying shaft, 22-screw blade, 3-first material distribution chamber, 31-air outlet, 4-second material distribution chamber, 41-discharge port, 5-rotary drum, 51-overflow port, 52-slag discharge port, 6-housing, 61-air outlet hole, 7-differential mechanism, 15-front main bearing, 16-screw front bearing, 17-screw rear bearing, 18-rear main bearing, 19-clear liquid outlet, 20-solid phase outlet, α -air dispersing sheet cone angle, β -flow deflector cone angle, a-air dispersing hole, b-supporting rod and c-blade.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to figures 1 to 9:
as shown in fig. 1, the horizontal decanter centrifuge of the present invention comprises a feeding pipe 1, a screw conveyor 2, a rotary drum 5, a housing 6, a differential 7, a front main bearing 15, a screw front bearing 16, a screw rear bearing 17, and a rear main bearing 18;
a rotary drum 5 is rotatably arranged in the housing 6, a screw conveyor 2 is rotatably arranged in the rotary drum 5, and the axes of the screw conveyor 2, the rotary drum 5 and the housing 6 are superposed;
a spiral flow passage is formed between the spiral conveyor 2 and the rotary drum 5; the housing 6 is divided into a left chamber, a middle chamber and a right chamber, the left chamber is communicated with the spiral flow passage through the overflow port 51, and the left chamber is communicated with the outside through the clear liquid outlet 19; the right chamber is communicated with the spiral flow channel through a slag discharge port 52, and is communicated with the outside through a solid phase outlet 20;
the left end of the rotary drum 5 is connected with a driving device in a motor driving mode, the right end of the rotary drum 5 is connected with a differential mechanism 7, an output shaft of the differential mechanism 7 is connected with a spiral conveying shaft 21, and the differential mechanism 7 can ensure that the spiral conveyor 2 and the rotary drum 5 rotate in the same direction at a certain rotation speed difference;
the screw conveyor 2 shown in fig. 1 and 7 includes a screw conveying shaft 21 and a screw blade 22;
the spiral conveying shaft 21 is a hollow shaft, the cylindrical surface of the spiral conveying shaft 21 close to the large end side of the rotary drum 5 is provided with air outlets 31 and discharge outlets 41 which are uniformly distributed in a ring shape, a first material distribution chamber 3 and a second material distribution chamber 4 are arranged in the hollow shaft, the first material distribution chamber 3 is communicated with the spiral flow channel through the air outlets 31, and the second material distribution chamber 4 is communicated with the spiral flow channel through the discharge outlets 41;
specifically, the spiral blade 22 close to the large end of the rotary drum is taken as the starting point of counting the number of turns of the spiral blade, the axial distance from the air outlet 31 to the overflow port 51 is the pitch of the 1 st turn of the spiral, the shape of the air outlet 31 is square, the number of the air outlets is 8, and the side length is the diameter of the spiral conveying shaft
The discharge hole 41 is arranged between the 4 th spiral;
as shown in fig. 7, 8 and 9, the root of the first circle of helical blades of the helical blade 22 close to the large end of the rotary drum is provided with sector holes with the same shape and size, the circle center of the sector hole is positioned on the axis of the helical conveying shaft, and the sector holes are respectively arranged at 90 degrees, 180 degrees, 270 degrees and 360 degrees of the first circle of helical blades; a vane c is fixed in each sector hole.
Specifically, the short arc end of the sector hole coincides with the root of the helical blade 22, the central angle of the sector hole is 10 °, and the length of the generatrix of the sector hole is the height of the helical blade 22
The blade c is welded in the fan-shaped hole, the outlet edge of the blade c is superposed with the symmetrical line of the fan-shaped hole on the suction surface of the helical blade 22, the section of the blade c is arc-shaped, the radius of the arc is 30mm, and the central angle is120 degrees and equal thickness of 2mm, and the included angle between the flow speed direction of the gas at the inlet edge of the blade c and the axial line of the screw conveyer is 45 degrees.
As shown in fig. 1 to 6, the feeding pipe 1 is concentrically arranged in a cylindrical section of the spiral conveying shaft 21, the feeding pipe 1 is not in contact with the spiral conveying shaft 21, the first material distribution chamber 3 and the second material distribution chamber 4, and the feeding pipe 1 comprises a tapered flow passage upper wall surface 11, a tapered flow passage lower wall surface 12, a straight pipe section 13 and a bent pipe 14;
a conical flow channel is formed between the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12, the conical flow channel is communicated with the feeding pipe 1 and the first material distribution chamber 3, and the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12 are positioned in the first material distribution chamber 3; one end of the straight pipe section 13 is connected with a bent pipe 14, the outlet of the other end is positioned in the second material distribution chamber 4, and the bent pipe 14 is arranged outside the housing 6;
the inlet end small arc of the tapered runner upper wall surface 11 is fixed on the straight pipe section 13, the tapered runner lower wall surface 12 comprises an opening ring 121 and a deflector 122, the opening ring 121 is in an omega shape and is fixed in the straight pipe section 13, and the inlet end arc of the deflector 122 is connected with the upper arc of the opening ring 121;
the bent pipe 14 is a 90-degree bent pipe, and the bending radius of the central shaft of the bent pipe 14 is 2 times of the diameter of the bent pipe;
the upper wall surface 11 and the lower wall surface 12 of the conical flow channel are both 180-degree rotating bodies, and the 0-degree (or 180-degree) plane of each rotating body is parallel to the horizontal ground; the axial line of the inlet section of the feeding pipe 1 is vertical to the horizontal ground, and the inlet direction of the material to be separated is the same as the gravity direction;
specifically, the inclination angle α of the conical surface of the upper wall surface 11 of the conical flow channel is 45 degrees, the radius of the circular arc at the inlet of the upper wall surface 11 of the conical flow channel is equal to the radius of the feeding pipe 1, the radius of the circular arc at the outlet of the upper wall surface 11 of the conical flow channel is 3 times of the radius of the feeding pipe 1, a plurality of circles of air dispersing holes a with the diameter of 3mm are uniformly distributed in a semi-annular mode and are arranged on the upper wall surface 11 of the conical flow channel, each half circle of air dispersing holes a are arranged at equal intervals, the inclination angle β of the conical surface of the lower wall surface 12 of
The plane of the outlet arc of the conical flow channel lower wall surface 12 is superposed with the plane of the outlet arc of the conical flow channel upper wall surface 11, and the circle center of the conical flow channel lower wall surface 12 is shifted down by 2mm compared with the circle center o of the conical flow channel upper wall surface 11; and a support rod b is fixed at the arc center positions of the outlet ends of the conical flow channel upper wall surface 11 and the conical flow channel lower wall surface 12 for reinforcement.
The data in the above examples, and the specific operation manner, are only used to show a practical case, and are not used to limit the present invention, and the operation in any detail, or the corresponding modification of the data, should not be considered as the improvement of the present invention.
Claims (4)
1. The utility model provides a spiral shell centrifuge is with compound exhaust structure crouches which characterized in that: the horizontal screw centrifuge comprises a feeding pipe (1), a screw conveyor (2), a rotary drum (5), a housing (6), a differential (7), a front main bearing (15), a screw front bearing (16), a screw rear bearing (17) and a rear main bearing (18);
the rotary drum (5) is rotatably arranged in the housing (6), the screw conveyor (2) is rotatably arranged in the rotary drum (5), and the axes of the screw conveyor (2), the rotary drum (5) and the housing (6) are overlapped;
a spiral flow channel is formed between the spiral conveyor (2) and the rotary drum (5); the housing (6) is divided into a left chamber, a middle chamber and a right chamber, the left chamber is communicated with the spiral flow channel through an overflow port (51), and the left chamber is communicated with the outside through a clear liquid outlet (19); the right chamber is communicated with the spiral flow channel through a slag discharge port (52), and is communicated with the outside through a solid phase outlet (20);
the left end of the rotary drum (5) is connected with a driving device, the driving mode is motor driving, the right end of the rotary drum (5) is connected with a differential mechanism (7), an output shaft of the differential mechanism (7) is connected with a spiral conveying shaft (21), and the differential mechanism (7) can ensure that the spiral conveyor (2) and the rotary drum (5) rotate in the same direction at a certain rotation speed difference;
the spiral conveyor (2) comprises a spiral conveying shaft (21) and a spiral blade (22);
the spiral conveying shaft (21) is a hollow shaft, a cylindrical surface of the spiral conveying shaft (21) close to the large end side of the rotary drum (5) is provided with air outlets (31) and discharge outlets (41) which are uniformly distributed in a ring shape, a first material distribution chamber (3) and a second material distribution chamber (4) are arranged in the hollow shaft, the first material distribution chamber (3) is communicated with the spiral flow channel through the air outlets (31), and the second material distribution chamber (4) is communicated with the spiral flow channel through the discharge outlets (41);
the feeding pipe (1) is concentrically arranged in a cylindrical section of a spiral conveying shaft (21), the feeding pipe (1) is not in contact with the spiral conveying shaft (21), the first material distribution chamber (3) and the second material distribution chamber (4), and the feeding pipe (1) comprises a conical flow channel upper wall surface (11), a conical flow channel lower wall surface (12), a straight pipe section (13) and a bent pipe (14);
the conical flow channel upper wall surface (11) and the conical flow channel lower wall surface (12) form a conical flow channel, the conical flow channel upper wall surface (11) is communicated with the feeding pipe (1) and the first material distribution chamber (3), and the conical flow channel upper wall surface (11) and the conical flow channel lower wall surface (12) are positioned in the first material distribution chamber (3); one end of the straight pipe section (13) is connected with an elbow pipe (14), the outlet of the other end of the straight pipe section is positioned in the second material distribution chamber (4), and the elbow pipe (14) is arranged outside the housing (6);
the inlet end small arc of the conical flow channel upper wall surface (11) is fixed on the straight pipe section (13), the conical flow channel lower wall surface (12) comprises an opening ring (121) and a flow deflector (122), the opening ring (121) is in an omega shape and is fixed in the straight pipe section (13), and the inlet end arc of the flow deflector (122) is connected with the upper arc of the opening ring (121).
2. The compound exhaust structure for the horizontal screw centrifuge according to claim 1, characterized in that: the root part of a first circle of spiral blades of the spiral blade (22) close to the large end of the rotary drum is provided with fan-shaped holes with the same shape and size, the circle center of each fan-shaped hole is positioned on the axis of the spiral conveying shaft, and the fan-shaped holes are respectively arranged at 90 degrees, 180 degrees, 270 degrees and 360 degrees of the first circle of spiral blades; a blade (c) is fixed in each fan-shaped hole;
the short arc end of the sector hole and the helical blade(s) ((22) The central angle of the sector hole is 10-20 degrees, and the length of the generatrix of the sector hole is the height of the helical blade (22)
The blade (c) is welded in the fan-shaped hole, the outlet edge of the blade (c) coincides with the symmetrical line of the fan-shaped hole on the suction surface of the helical blade (22), the blade section of the blade (c) is arc-shaped, the radius of the arc is 30mm, the central angle is 120 degrees, the thickness is equal to 2mm, and the included angle between the gas flow speed direction of the inlet edge of the blade (c) and the axis of the helical conveyor is 45-60 degrees.
3. The compound exhaust structure for the horizontal screw centrifuge according to claim 1, characterized in that: the spiral blade (22) close to the large end of the rotary drum is taken as the starting point for counting the number of turns of the spiral blade, the axial distance from the air outlet (31) to the overflow port (51) is the pitch of the 1 st turn of the spiral, the air outlet (31) is square in shape, the number of the air outlet is 8, and the side length of the air outlet is the diameter of the spiral conveying shaft
The discharge hole (41) is arranged between the 4 th spiral.
4. The compound exhaust structure for the horizontal screw centrifuge according to claim 1, characterized in that: the bent pipe (14) is a 90-degree bent pipe, and the bending radius of the central line of the bent pipe (14) is 2 times of the diameter of the bent pipe;
the upper wall surface (11) and the lower wall surface (12) of the conical flow channel are both 180-degree rotating bodies, and the 0-degree or 180-degree plane of each rotating body is parallel to the horizontal ground; the axial line of the inlet section of the feeding pipe (1) is vertical to the horizontal ground, and the inlet direction of the material to be separated is the same as the gravity direction;
the conical surface inclination angle α of the conical flow channel upper wall surface (11) is 30-45 degrees, the inlet arc radius of the conical flow channel upper wall surface (11) is equal to the radius of the feeding pipe (1), and the outlet arc radius of the conical flow channel upper wall surface (11) isThe radius of the feeding pipe (1) is 3 times of that of the feeding pipe, a plurality of circles of air dispersing holes (a) with the diameter of 3mm are uniformly distributed in a semi-annular mode on the upper wall surface (11) of the conical flow passage, each half circle of air dispersing holes (a) are arranged at equal intervals, the inclined angle β of the conical surface of the lower wall surface (12) of the conical flow passage is 25-35 degrees, and the arc radius of the inlet end of the lower wall surface (12) of the conical flow passage is the radius of the feeding pipe (1)
The plane of the outlet arc of the conical flow channel lower wall surface (12) is superposed with the plane of the outlet arc of the conical flow channel upper wall surface (11), and the circle center of the conical flow channel lower wall surface (12) is shifted down by 2mm compared with the circle center (o) of the conical flow channel upper wall surface (11); and a support rod (b) is fixed at the arc center positions of the outlet ends of the upper wall surface (11) and the lower wall surface (12) of the conical flow channel for reinforcement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796036.3U CN210386218U (en) | 2019-05-29 | 2019-05-29 | Compound exhaust structure for horizontal screw centrifuge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920796036.3U CN210386218U (en) | 2019-05-29 | 2019-05-29 | Compound exhaust structure for horizontal screw centrifuge |
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| CN210386218U true CN210386218U (en) | 2020-04-24 |
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| CN201920796036.3U Withdrawn - After Issue CN210386218U (en) | 2019-05-29 | 2019-05-29 | Compound exhaust structure for horizontal screw centrifuge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142149A (en) * | 2019-05-29 | 2019-08-20 | 浙江工业大学 | A kind of compound exhaust structure of decanter centrifuge |
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2019
- 2019-05-29 CN CN201920796036.3U patent/CN210386218U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142149A (en) * | 2019-05-29 | 2019-08-20 | 浙江工业大学 | A kind of compound exhaust structure of decanter centrifuge |
| CN110142149B (en) * | 2019-05-29 | 2024-05-03 | 浙江工业大学 | Compound exhaust structure for horizontal decanter centrifuge |
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Granted publication date: 20200424 Effective date of abandoning: 20240503 |