CN110683621A - Flocculating agent inlet pipe for horizontal screw centrifuge - Google Patents
Flocculating agent inlet pipe for horizontal screw centrifuge Download PDFInfo
- Publication number
- CN110683621A CN110683621A CN201910972425.1A CN201910972425A CN110683621A CN 110683621 A CN110683621 A CN 110683621A CN 201910972425 A CN201910972425 A CN 201910972425A CN 110683621 A CN110683621 A CN 110683621A
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- China
- Prior art keywords
- pipe
- flocculant
- feeding
- inlet
- straight pipe
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000008394 flocculating agent Substances 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 49
- 239000000872 buffer Substances 0.000 claims abstract description 24
- 239000007853 buffer solution Substances 0.000 claims abstract description 11
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 230000008676 import Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
Abstract
A flocculant feeding pipe for a horizontal screw centrifuge comprises a feeding pipe and a flocculant buffer pipe which are positioned at the feeding end of the horizontal screw centrifuge; in the feeding pipe, an inlet straight pipe is positioned at the inlet position of the feeding pipe, the head end of the inlet straight pipe is connected with a flange ring, the inlet straight pipe is respectively connected with a material conveying end and a reducing pipe through a flange, and the reducing pipe is connected with a mixing pipe; in the mixing pipe, the thin straight pipe is connected with the divergent pipe, the connecting hole is connected with the flocculating agent buffer pipe, the divergent pipe is connected with the outlet straight pipe, and the outlet of the outlet straight pipe is arranged in the material distribution chamber; in the flocculating agent buffer tube, the oval nozzle is arranged in the mixing tube, and the flocculating agent is mixed with the materials in the mixing tube through the overflow hole and the flocculating agent inlet surface. The invention increases the contact surface of the flocculant buffer solution and the material to be separated, and reduces the influence on the normal feeding of the material to be separated through the bullet-like structure of the nozzle to the maximum extent, thereby improving the binding degree of the flocculant buffer solution and the material to be separated.
Description
Technical Field
The invention belongs to the field of centrifuges, and particularly relates to a flocculant feeding pipe for a horizontal decanter centrifuge.
Background
The solid-liquid separation capacity of the horizontal screw centrifuge is influenced by the physical properties such as the particle size of the material to be separated, the water content of the material and the like. In the traditional process, before the separated materials enter a horizontal screw centrifuge distribution bin, a flocculating agent needs to be added into the materials to be separated, so that the dehydration efficiency of the materials to be separated is improved, and the materials are further transported.
The material to be separated and the flocculating agent are combined through a three-way pipe, mixed flocculation is carried out at a feeding pipe and a material distribution bin, and then the material is separated at a rotary drum. This mixing mode is only let in the flocculating agent in waiting to separate the material, has the flocculating agent and waits to separate the not high and then be difficult to guarantee that the material that waits to separate obtains abundant preliminary treatment's problem of degree of binding, and partial flocculating agent is wasted, has promoted the separation cost.
Therefore, in order to improve the binding degree of the flocculant and the material to be separated and further improve the separation effect of the material, improve the efficiency of the horizontal screw centrifuge and reduce the separation cost, a certain improvement needs to be carried out on the flocculant feeding pipe for the horizontal screw centrifuge.
Disclosure of Invention
In order to overcome the defect that the mixing efficiency of a flocculant buffer solution and a material to be separated in the traditional horizontal screw centrifuge is not high, the invention provides the flocculant feeding pipe for the horizontal screw centrifuge, which has higher mixing efficiency.
The technical scheme adopted by the invention is as follows:
a flocculant feeding pipe for a horizontal screw centrifuge comprises a feeding pipe and a flocculant buffer pipe which are positioned at the feeding end of the horizontal screw centrifuge;
the feeding pipe comprises an inlet straight pipe, a reducing pipe, a mixing pipe, a gradually expanding pipe and an outlet straight pipe, the flowing direction of the material is defined to be the positive direction, the inlet straight pipe is positioned at the inlet position of the feeding pipe, the head end of the inlet straight pipe is connected with a flange ring, the inlet straight pipe is respectively connected with a material conveying end and the reducing pipe through flanges, and the reducing pipe is connected with the mixing pipe; the mixing pipe comprises a fine straight pipe and a connecting hole, the fine straight pipe is connected with an expanding pipe, the connecting hole is connected with a flocculating agent buffer pipe, the expanding pipe is connected with an outlet straight pipe, and an outlet of the outlet straight pipe is arranged in the material distribution chamber;
the flocculant buffer tube comprises an oval nozzle, a connecting tube and a flocculant conveying tube which are sequentially connected; the elliptical nozzle comprises an elliptical pipe, an overflow hole and a flocculating agent inlet face, the elliptical nozzle is arranged in the mixing pipe, and the flocculating agent passes through the overflow hole and the flocculating agent inlet face to be mixed with the materials in the mixing pipe.
Further, the flocculating agent conveyer pipe is a bypass pipe, is fixed in the flocculating agent conveyer pipe by one section of support, and the other end is fixed in the import straight tube.
Preferably, the inlet straight pipe is of a circular pipe type structure, the reducer is of a conical structure, and the radius of the inlet section is greater than that of the outlet section; the mixing pipe is of a circular pipe type structure; the thin straight pipe is of a circular pipe type structure, and the central axis of the thin straight pipe is superposed with the feeding pipe; the gradually expanding pipe is of a round table structure, and the radius of an inlet section of the gradually expanding pipe is smaller than that of an outlet section; the outlet straight pipe is of a circular pipe type structure.
The conical surface inclination angle alpha of the reducing pipe and the gradually expanding pipe of the feeding pipe1＝α270-85 degrees, the outer diameter D1 of the inlet straight pipe is 110-150mm, the outer diameter D2 of the mixing pipe is D1-50mm, and the outer diameter D3 of the outlet straight pipe is D1+10 mm; the length of the inlet straight pipe is L1-470-600 mm, the length of the reducer is L2-L1-270 mm, the length of the mixing pipe is L3-L1-370 mm, the length of the divergent pipe is L4-L1-270 mm, and the length of the outlet straight pipe is L5-L1 +800 mm.
Still further, the connecting hole of inlet pipe with the connecting pipe of flocculating agent buffer tube is fixed mutually through welded connection, the direction change entering oval nozzle of flocculating agent buffer solution is passed through 90 return bends behind anterior segment D4 ═ 15 mm's thin straight tube section to the flocculating agent conveyer pipe.
As shown in fig. 4, a rectangular coordinate system is established by taking the feeding direction of the material as the x direction, the feeding direction of the flocculating agent as the y direction and the center of a circle of the interface of the elliptical nozzle and the flocculating agent conveying pipe as a far point, and the cross section of the outer wall of the elliptical nozzle is formed by
As determined by the equation (a), and the wall thickness is the same as the flocculant delivery tube. The oval nozzle is welded on the flocculant conveying pipe after being manufactured and formed.
Preferably, overflow holes with the aperture of 2mm and the total number of 24 are arranged on the surface of the elliptical nozzle at intervals of 60 degrees, and the overflow holes are cylindrical through holes.
The invention has the beneficial effects that:
(1) an elliptical nozzle 21 is adopted to mix the flocculant buffer solution with the materials to be separated, 24 overflow holes 212 with the aperture of 2mm are arranged on the surface of the nozzle to increase the contact surface of the flocculant buffer solution and the materials to be separated, and meanwhile, the influence on the normal feeding of the materials to be separated is reduced to the maximum extent through the bullet-like structure of the nozzle, so that the combination degree of the flocculant buffer solution and the materials to be separated is improved.
(2) The feed pipe 1 takes the form of a reducer 12, a mixing pipe 13, and a reducer 14. The material to be separated is accelerated by the reducing pipe 12, lower pressure is generated at the position of the mixing pipe 13, and then the pressure at the position of the mixing pipe 13 is lower than that of the flocculant buffer liquid pipe 2, so that the flocculant buffer liquid is mixed with the material to be separated at a higher speed, and the binding degree of the flocculant buffer liquid and the material to be separated is improved.
(3) This scheme is actually a bypass structure, adopts three supports to fix and makes the atress distribution of flocculating agent conveyer pipe more stable.
Drawings
FIG. 1 is a cross-sectional view of an embodiment of a decanter centrifuge;
FIG. 2 is a schematic diagram of a flocculant feed pipe configuration in one embodiment;
FIG. 3 is a schematic diagram of a feed pipe and flocculant surge tank in one embodiment;
FIG. 4 is a left side view of a flocculant buffer tube in one embodiment;
FIG. 5 is a front view of a flocculant buffer tube in one embodiment;
FIG. 6 is a schematic diagram of the feed tube configuration in one embodiment;
FIG. 7 is a schematic diagram of the structure of the support in one embodiment;
description of reference numerals: 1-feeding pipe, 11-inlet straight pipe, 111-flange ring, 12-reducing pipe, 13-mixing pipe, 131-thin straight pipe, 132-connecting hole, 14-reducing pipe and 15-outletStraight tube, 2-flocculating agent buffer tube, 21-elliptical nozzle, 211-elliptical tube, 212-overflow hole, 213-flocculating agent inlet surface, 22-connecting tube, 23-flocculating agent conveying tube, 3-material distribution bin, 4-spiral pusher, 5-rotary drum, 6-bracket, alpha1-angle of taper angle, α2-angle of taper of divergent tube, a-flow direction of material to be separated, b-flow direction of buffer solution of flocculant, x-feed direction of material, y-feed direction of flocculant, D1-outer diameter of straight inlet tube 11, D2-outer diameter of mixing tube 13, D3-outer diameter of straight outlet tube 15, D4-outer diameter of flocculant delivery tube 23, L1-length of straight inlet tube 11, L2-length of convergent tube 12, L3-length of mixing tube 13, L4-length of divergent tube 14, L5-length of straight outlet tube 15.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 7, a flocculant feeding pipe for a horizontal decanter centrifuge comprises a feeding pipe 1 and a flocculant buffer pipe 2 which are positioned at the feeding end of the horizontal decanter centrifuge;
the feeding pipe 1 specifically comprises an inlet straight pipe 11, a reducing pipe 12, a mixing pipe 13, a gradually expanding pipe 14 and an outlet straight pipe 15;
defining the material flowing direction as a positive direction, wherein the head end of an inlet straight pipe 11 (which is located at the inlet position of the feeding pipe and is specifically of a circular pipe type structure) is connected with a flange ring 111, the inlet straight pipe 11 is respectively connected with a material conveying end and a reducing pipe 12 through the flange ring 111, the reducing pipe 12 (which is specifically of a conical structure and is specifically larger than the inlet section in radius) is connected with a mixing pipe 13 (which is specifically of a circular pipe type structure);
the mixing pipe 13 comprises a thin straight pipe 131 (which is a circular pipe type structure and the central axis of the thin straight pipe coincides with the feeding pipe) and a connecting hole 132, the thin straight pipe 131 is connected with a divergent pipe 14 (which is a circular table type structure, and the radius of an inlet section of the thin straight pipe is smaller than that of an outlet section of the thin straight pipe), the connecting hole 132 is connected with a flocculating agent buffer pipe 2 through welding, the divergent pipe 14 is connected with an outlet straight pipe 15, and the outlet of the outlet straight pipe 15 (which is a circular pipe type structure) is arranged in the material distribution chamber 3.
The flocculating agent buffer tube 2 comprises an oval nozzle 21, a connecting tube 22 and a flocculating agent conveying tube 23; the elliptical nozzle 21 comprises an elliptical pipe 211, an overflow hole 212 and a flocculating agent inlet surface 213, the elliptical nozzle 21 is arranged in the mixing pipe 13, and flocculating agent is mixed with materials in the mixing pipe 13 through the overflow hole 212 and the flocculating agent inlet surface 213.
The flocculating agent conveyer pipe 23 is a bypass pipe, and is fixed in the flocculating agent conveyer pipe 23 by one section of support 6, and the other end is fixed in the import straight tube 11.
The taper angle α of the reducing pipe 12 and the expanding pipe 14 of the feeding pipe 11＝α270-85 degrees, the outer diameter D1 of the inlet straight pipe 11 is 110-150mm, the outer diameter D2 of the mixing pipe 13 is D1-50mm, and the outer diameter D3 of the outlet straight pipe 15 is D1+10 mm; the length of the inlet straight pipe 11 is L1-470-600 mm, the length of the reducer 12 is L2-L1-270 mm, the length of the mixing pipe 13 is L3-L1-370 mm, the length of the divergent pipe 14 is L4-L1-270 mm, and the length of the outlet straight pipe 15 is L5-L1 +800 mm.
The connecting hole 132 of the feeding pipe 1 is fixed with the connecting pipe 22 of the flocculating agent buffer pipe 2 through welding connection. The flocculant conveying pipe 23 changes the direction of a flocculant buffer solution into the elliptical nozzle 21 through a 90-degree bent pipe after a thin straight pipe section with the front section D4 being 15 mm.
As shown in FIG. 4, a rectangular coordinate system is established by taking the feeding direction of the material as the x direction, the feeding direction of the flocculating agent as the y direction and the center of the interface of the elliptical nozzle 21 and the flocculating agent conveying pipe 23 as a far point, and the cross section of the outer wall of the elliptical nozzle is formed by
As determined by the equation (a), and the wall thickness is the same as the flocculant delivery tube. The oval nozzle 21 is formed and welded to the flocculant delivery pipe 23.
The work flow of the flocculant feeding pipe for the horizontal decanter centrifuge of the embodiment is as follows:
(1) the material to be separated enters from the inlet straight pipe 11 of the feeding pipe 1 and is accelerated to the mixing pipe 13 through the reducing pipe 12.
(2) The flocculant buffer liquid flows from the flocculant conveying pipe 23 of the flocculant buffer liquid pipe 2, one part reaches the mixing pipe through the flocculant inlet face 213 of the elliptical nozzle 21, and the other part reaches the mixing pipe 13 through the overflow hole 212 of the elliptical nozzle 21.
(3) The flocculant buffer is mixed with the material to be separated in the mixing pipe 13.
(4) The material to be separated and the flocculant buffer solution reach the material distribution chamber 3 through the divergent pipe 14 and the outlet straight pipe 15.
Claims (8)
1. A flocculant feeding pipe for a horizontal screw centrifuge is characterized by comprising a feeding pipe and a flocculant buffer pipe which are positioned at the feeding end of the horizontal screw centrifuge;
the feeding pipe comprises an inlet straight pipe, a reducing pipe, a mixing pipe, a gradually expanding pipe and an outlet straight pipe, the flowing direction of the material is defined to be the positive direction, the inlet straight pipe is positioned at the inlet position of the feeding pipe, the head end of the inlet straight pipe is connected with a flange ring, the inlet straight pipe is respectively connected with a material conveying end and the reducing pipe through flanges, and the reducing pipe is connected with the mixing pipe; the mixing pipe comprises a fine straight pipe and a connecting hole, the fine straight pipe is connected with an expanding pipe, the connecting hole is connected with a flocculating agent buffer pipe, the expanding pipe is connected with an outlet straight pipe, and an outlet of the outlet straight pipe is arranged in the material distribution chamber;
the flocculant buffer tube comprises an oval nozzle, a connecting tube and a flocculant conveying tube which are sequentially connected; the elliptical nozzle comprises an elliptical pipe, an overflow hole and a flocculating agent inlet face, the elliptical nozzle is arranged in the mixing pipe, and the flocculating agent passes through the overflow hole and the flocculating agent inlet face to be mixed with the materials in the mixing pipe.
2. The flocculant feeding pipe for the horizontal decanter centrifuge as claimed in claim 1, wherein the flocculant conveying pipe is a bypass pipe, and is fixed to the flocculant conveying pipe at one end by a bracket, and is fixed to the inlet straight pipe at the other end.
3. The flocculant feeding pipe for the horizontal decanter centrifuge as claimed in claim 1 or 2, wherein said inlet straight pipe is of a circular pipe type structure, said reducer is of a conical type structure, and particularly, the radius of the inlet section is larger than that of the outlet section; the mixing pipe is of a circular pipe type structure; the thin straight pipe is of a circular pipe type structure, and the central axis of the thin straight pipe is superposed with the feeding pipe; the gradually expanding pipe is of a round table structure, and the radius of an inlet section of the gradually expanding pipe is smaller than that of an outlet section; the outlet straight pipe is of a circular pipe type structure.
4. The flocculant feed pipe for a horizontal decanter centrifuge as claimed in claim 3, wherein the tapered angle α of the reducing pipe and the diverging pipe of the feed pipe is set to be smaller than the taper angle α1＝α270-85 degrees, the outer diameter D1 of the inlet straight pipe is 110-150mm, the outer diameter D2 of the mixing pipe is D1-50mm, and the outer diameter D3 of the outlet straight pipe is D1+10 mm; the length of the inlet straight pipe is L1-470-600 mm, the length of the reducer is L2-L1-270 mm, the length of the mixing pipe is L3-L1-370 mm, the length of the divergent pipe is L4-L1-270 mm, and the length of the outlet straight pipe is L5-L1 +800 mm.
5. The flocculant feeding pipe for the horizontal decanter centrifuge as claimed in claim 4, wherein the connecting hole of the feeding pipe is fixed to the connecting pipe of the flocculant buffer pipe by welding, and the flocculant conveying pipe changes the direction of a flocculant buffer solution into the elliptical nozzle by a 90 ° bent pipe after a thin straight pipe section with a front section of D4 being 15 mm.
6. The flocculant feeding pipe for the horizontal decanter centrifuge as claimed in claim 1 or 2, wherein a rectangular coordinate system is established with the center of the interface of the elliptical nozzle and the flocculant conveying pipe as a far point by taking the feeding direction of the material as the x direction and the feeding direction of the flocculant as the y direction, and the cross section of the outer wall of the elliptical nozzle is formed by
And the wall thickness is the same as that of the flocculant conveying pipe, and the oval nozzle is welded on the flocculant conveying pipe after being manufactured and formed.
7. A flocculant feed pipe for a horizontal decanter centrifuge as claimed in claim 1 or 2, wherein 24 overflow holes each having a hole diameter of 2mm and the total number thereof are provided on the surface of the elliptical nozzle at intervals of 60 °.
8. The flocculant feeding pipe for a horizontal decanter centrifuge according to claim 1 or 2, wherein said overflow hole is a cylindrical through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910972425.1A CN110683621B (en) | 2019-10-14 | 2019-10-14 | Flocculant feed pipe for horizontal decanter centrifuge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910972425.1A CN110683621B (en) | 2019-10-14 | 2019-10-14 | Flocculant feed pipe for horizontal decanter centrifuge |
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| Publication Number | Publication Date |
|---|---|
| CN110683621A true CN110683621A (en) | 2020-01-14 |
| CN110683621B CN110683621B (en) | 2024-04-16 |
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| CN110683621B (en) | 2024-04-16 |
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