CN110683621B - Flocculant feed pipe for horizontal decanter centrifuge - Google Patents
Flocculant feed pipe for horizontal decanter centrifuge Download PDFInfo
- Publication number
- CN110683621B CN110683621B CN201910972425.1A CN201910972425A CN110683621B CN 110683621 B CN110683621 B CN 110683621B CN 201910972425 A CN201910972425 A CN 201910972425A CN 110683621 B CN110683621 B CN 110683621B
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- Prior art keywords
- pipe
- flocculant
- tube
- inlet
- straight
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- 239000000463 material Substances 0.000 claims abstract description 51
- 239000000872 buffer Substances 0.000 claims abstract description 28
- 239000008394 flocculating agent Substances 0.000 claims abstract description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000011148 porous material Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 239000007853 buffer solution Substances 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000003466 welding Methods 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Centrifugal Separators (AREA)
- Treatment Of Sludge (AREA)
Abstract
A flocculant feed pipe for a decanter centrifuge comprises a feed pipe and a flocculant buffer pipe, wherein the feed pipe and the flocculant buffer pipe are positioned at a feed end of the decanter 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 tube, a thin straight tube is connected with an expanding tube, a connecting hole is connected with a flocculating agent buffer tube, the expanding tube is connected with an outlet straight tube, and the outlet of the outlet straight tube is arranged in a material distribution chamber; in the flocculant buffer tube, an elliptical nozzle is arranged in the mixing tube and the flocculant is mixed with the material in the mixing tube through an overflow hole and the flocculant inlet surface. The invention increases the contact surface of the flocculant buffer solution and the material to be separated, and reduces the influence of normal feeding of the material to be separated to the greatest extent through the bullet-like structure of the nozzle, thereby improving the combination 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 feed pipe for a horizontal decanter centrifuge.
Background
The solid-liquid separation capacity of the decanter centrifuge is influenced by the physical properties of the material to be separated, such as particle size, water content of the material, and the like. In the traditional process, flocculant is required to be added into the material to be separated before the separated material enters the distribution bin of the horizontal decanter centrifuge, so that the dehydration efficiency of the material to be separated is improved, and the material is convenient to further transport.
The materials to be separated and the flocculant are usually combined through a tee pipe, mixed flocculation is carried out at a feed pipe and a material distribution bin, and then the materials are separated at a rotary drum. The mixing mode is to only introduce the flocculant into the material to be separated, so that the problem that the degree of combination of the flocculant and the material to be separated is not high, and further, the material to be separated is difficult to ensure to be sufficiently pretreated is solved, part of flocculant is wasted, and the separation cost is increased.
Therefore, in order to improve the combination degree of the flocculant and the material to be separated and further improve the separation effect of the material, the efficiency of the decanter centrifuge is improved, the separation cost is reduced, and a flocculant feeding pipe for the decanter centrifuge needs to be improved to a certain extent.
Disclosure of Invention
In order to overcome the defect of low mixing efficiency of flocculant buffer solution and materials to be separated in the traditional decanter centrifuge, the invention provides the flocculant feed pipe for the decanter centrifuge, which has higher mixing efficiency.
The technical scheme adopted by the invention is as follows:
a flocculant feed pipe for a decanter centrifuge comprises a feed pipe and a flocculant buffer pipe, wherein the feed pipe and the flocculant buffer pipe are positioned at a feed end of the decanter centrifuge;
the feeding pipe comprises an inlet straight pipe, a reducing pipe, a mixing pipe, a reducing pipe and an outlet straight pipe, the material flowing direction 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 tube comprises a thin straight tube and a connecting hole, the thin straight tube is connected with a divergent tube, the connecting hole is connected with a flocculating agent buffer tube, the divergent tube is connected with an outlet straight tube, and the outlet of the outlet straight tube is arranged in a material distribution chamber;
the flocculant buffer tube comprises an oval nozzle, a connecting tube and a flocculant conveying tube which are connected in sequence; the oval nozzle comprises an oval pipe, an overflow hole and a flocculating agent inlet surface, the oval nozzle is arranged in the mixing pipe, and the flocculating agent is mixed with materials in the mixing pipe through the overflow hole and the flocculating agent inlet surface.
Further, the flocculant conveying pipe is a bypass pipe, one section of the bracket is fixed on the flocculant conveying pipe, and the other end of the bracket is fixed on the inlet straight pipe.
Preferably, the inlet straight pipe is of a circular pipe type structure, the reducing pipe is of a conical structure, and the radius of a specific inlet section is larger than that of an outlet section; the mixing tube is of a circular tube type structure; the thin straight pipe is of a circular pipe structure, and the central axis of the thin straight pipe coincides with the feeding pipe; the gradually-expanding pipe is of a truncated cone structure, and the radius of an inlet section of the gradually-expanding pipe is smaller than that of an outlet section of the gradually-expanding pipe; the outlet straight pipe is of a circular pipe type structure.
Conical surface inclination angle alpha of shrinkage reducing pipe and gradual enlarging pipe of the feeding pipe 1 ＝α 2 The external diameter d1 of the inlet straight pipe is 110-150mm, the external diameter of the mixing pipe is d2=d1-50 mm, and the external diameter of the outlet straight pipe is d3=d1+10mm; 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 flocculant buffer tube is fixed through welded connection mutually, the flocculant conveyer pipe passes through 90 return bend with the direction of flocculant buffer liquid and gets into oval nozzle behind the thin straight tube section of anterior segment d4=15mm.
As shown in figure 4, the 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 between the elliptical nozzle and the flocculating agent conveying pipe as the far point, and the cross section of the outer wall of the elliptical nozzle is formed byAnd the wall thickness is the same as the flocculant delivery pipe. The oval nozzle is welded on the flocculant conveying pipe after being manufactured and formed.
Preferably, the elliptical nozzle surface is provided with overflow holes with the aperture of 2mm and the total number of 24 at intervals of 60 degrees, and the overflow holes are cylindrical through holes.
The beneficial effects of the invention are as follows:
(1) The elliptical nozzle 21 is adopted to mix the flocculant buffer solution with the material to be separated, and the contact surface of the flocculant buffer solution and the material to be separated is enlarged by 24 overflow holes 212 with the aperture of 2mm on the surface of the nozzle, and meanwhile, the influence of normal feeding of the material to be separated is reduced to the greatest extent through the bullet-like structure of the nozzle, so that the combination degree of the flocculant buffer solution and the material to be separated is improved.
(2) The feed pipe 1 takes the form of a reducer 12, a mixer 13, and a reducer 14. The material to be separated is accelerated by the shrinkage reducing pipe 12, lower pressure is generated at the mixing pipe 13, so that the pressure at the mixing pipe 13 is lower than that of the flocculant buffer liquid pipe 2, the flocculant buffer liquid is mixed with the material to be separated at a faster speed, and the combination degree of the flocculant buffer liquid and the material to be separated is improved.
(3) The scheme is actually a bypass structure, and the three brackets are adopted for fixing so that the stress distribution of the flocculant conveying pipe is more stable.
Drawings
FIG. 1 is a cross-sectional view of a decanter centrifuge in one embodiment;
FIG. 2 is a schematic diagram of a flocculant feed pipe in an embodiment;
FIG. 3 is a schematic diagram of a feed tube and flocculant buffer tube in an embodiment;
FIG. 4 is a left side view of a flocculant buffer tube in an embodiment;
FIG. 5 is an elevation view of a flocculant buffer pipe in an embodiment;
FIG. 6 is a schematic view of the structure of a feed pipe in one embodiment;
FIG. 7 is a schematic view of the structure of the stand in one embodiment;
reference numerals illustrate: 1-feeding pipe, 11-inlet straight pipe, 111-flange ring, 12-reducing pipe, 13-mixing pipe, 131-fine straight pipe, 132-connecting hole, 14-reducing pipe, 15-outlet straight pipe, 2-flocculating agent buffer pipe, 21-elliptic nozzle, 211-elliptic pipe, 212-overflow hole, 213-flocculating agent inlet face, 22-connecting pipe, 23-flocculating agent conveying pipe, 3-material distributing bin, 4-spiral pusher, 5-rotary drum, 6-bracket and alpha 1 -taper cone inclination angle, alpha 2 -the inclination angle of the conical surface of the divergent pipe,a-flow direction of the material to be separated, b-flow direction of the flocculant buffer, x-feed direction of the material, y-feed direction of the flocculant, outer diameter of D1-inlet straight pipe 11, outer diameter of D2-mixing pipe 13, outer diameter of D3-outlet straight pipe 15, outer diameter of D4-flocculant conveying pipe 23, length of L1-inlet straight pipe 11, length of L2-reducer 12, length of L3-mixing pipe 13, length of L4-reducer 14, length of L5-outlet straight pipe 15.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 7, a flocculant feed pipe for a decanter centrifuge comprises a feed pipe 1 and a flocculant buffer pipe 2 at a feed end of the decanter centrifuge;
the feeding pipe 1 specifically comprises an inlet straight pipe 11, a reducing pipe 12, a mixing pipe 13, a diverging pipe 14 and an outlet straight pipe 15;
defining the material flow direction as a positive direction, wherein the inlet straight pipe 11 (which is positioned at the inlet position of the feeding pipe and is specifically a circular pipe type structure) is connected with a flange ring 111 at the head end thereof, the inlet straight pipe 11 is respectively connected with the material conveying end and the reducing pipe 12 through the flange 111, the reducing pipe 12 (which is specifically a conical structure and is specifically a radius of an inlet section of the reducing pipe is larger than that of an outlet section), and the reducing pipe 12 is connected with the mixing pipe 13 (which is specifically a circular pipe type structure);
the mixing tube 13 includes a thin straight tube 131 (which is specifically a circular tube structure and the central axis coincides with the feeding tube), and a connecting hole 132, the thin straight tube 131 is connected with a divergent tube 14 (which is specifically a circular table structure, and the specific radius of the inlet section is smaller than that of the outlet section), the connecting hole 132 is connected with the flocculant buffer tube 2 by welding, the divergent tube 14 is connected with an outlet straight tube 15, and the outlet of the outlet straight tube 15 (which is specifically a circular tube structure) is disposed in the material distribution chamber 3.
The flocculant buffer tube 2 comprises an elliptical nozzle 21, a connecting tube 22 and a flocculant conveying tube 23; the oblong nozzle 21 comprises an oblong tube 211, an overflow aperture 212 and a flocculant inlet face 213, the oblong nozzle 21 being arranged in the mixing tube 13 and the flocculant being mixed with the material in the mixing tube 13 through the overflow aperture 212 and the flocculant inlet face 213.
The flocculant delivery pipe 23 is a bypass pipe, one section of the bracket 6 is fixed on the flocculant delivery pipe 23, and the other end of the bracket is fixed on the inlet straight pipe 11.
Conical surface inclination angle alpha of the shrinkage reducing pipe 12 and the gradual enlarging pipe 14 of the feeding pipe 1 1 ＝α 2 The external diameter d1=110-150 mm of the inlet straight pipe 11, the external diameter d2=d1-50 mm of the mixing pipe 13, and the external diameter d3=d1+10mm of the outlet straight pipe 15; 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 diverging 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 tube 2 through welding connection. The flocculant transfer pipe 23 redirects the flocculant buffer into the elliptical nozzle 21 through a 90 ° bend after a straight thin pipe section with a front section d4=15 mm.
As shown in FIG. 4, the rectangular coordinate system is established by taking the feeding direction of the material as the x direction, the feeding direction of the flocculant as the y direction and the center of the interface between the elliptical nozzle 21 and the flocculant conveying pipe 23 as the far point, and the cross section of the outer wall of the elliptical nozzle is formed byAnd the wall thickness is the same as the flocculant delivery pipe. The oval nozzle 21 is welded to the flocculant transfer pipe 23 after being formed.
The surface of the elliptical nozzle 21 has overflow holes 212 each 60 ° having a diameter of 2mm and a total number of 24, and the overflow holes are cylindrical through holes.
The working flow of the flocculant feed pipe for the decanter centrifuge of the embodiment is as follows:
(1) The material to be separated enters from the inlet straight pipe 11 of the feed pipe 1 and is accelerated to the mixing pipe 13 through the reducing pipe 12.
(2) The flocculant buffer solution reaches the mixing pipe from the flocculant delivery pipe 23 of the flocculant buffer solution 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 on the elliptical nozzle 21.
(3) The flocculant buffer is mixed with the material to be separated in a mixing pipe 13.
(4) The material to be separated together with the flocculant buffer solution passes through a divergent pipe 14 and an outlet straight pipe 15 to the material distribution chamber 3.
Claims (7)
1. The flocculant feed pipe for the decanter centrifuge is characterized by comprising a feed pipe and a flocculant buffer pipe, wherein the feed pipe and the flocculant buffer pipe are positioned at the feed end of the decanter centrifuge;
the feeding pipe comprises an inlet straight pipe, a reducing pipe, a mixing pipe, a reducing pipe and an outlet straight pipe, the material flowing direction 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 tube comprises a thin straight tube and a connecting hole, the thin straight tube is connected with a divergent tube, the connecting hole is connected with a flocculating agent buffer tube, the divergent tube is connected with an outlet straight tube, and the outlet of the outlet straight tube is arranged in a material distribution chamber;
the flocculant buffer tube comprises an oval nozzle, a connecting tube and a flocculant conveying tube which are connected in sequence; the elliptical nozzle comprises an elliptical pipe, an overflow hole and a flocculating agent inlet surface, the elliptical nozzle is arranged in the mixing pipe, and the flocculating agent is mixed with materials in the mixing pipe through the overflow hole and the flocculating agent inlet surface; the overflow holes are arranged on the peripheral surface of the elliptical nozzle, and the spraying direction of the flocculant inlet surface is perpendicular to the material flowing direction.
2. A flocculant feed pipe for a decanter centrifuge as claimed in claim 1, wherein the flocculant feed pipe is a bypass pipe secured to the flocculant feed pipe at one end of the support and to the inlet straight pipe at the other end.
3. A flocculant feed pipe for a decanter centrifuge as claimed in claim 1 or 2, wherein the inlet straight pipe has a circular pipe structure, the reducer has a conical structure, and the radius of the inlet section is larger than that of the outlet section; the mixing tube is of a circular tube type structure; the thin straight pipe is of a circular pipe structure, and the central axis of the thin straight pipe coincides with the feeding pipe; the gradually-expanding pipe is of a truncated cone structure, and the radius of an inlet section of the gradually-expanding pipe is smaller than that of an outlet section of the gradually-expanding pipe; the outlet straight pipe is of a circular pipe type structure.
4. A flocculant feed pipe for a decanter centrifuge as claimed in claim 3, wherein the taper angle α of the reducer and the divergent pipe of the feed pipe 1 ＝α 2 The external diameter d1 of the inlet straight pipe is 110-150mm, the external diameter of the mixing pipe is d2=d1-50 mm, and the external diameter of the outlet straight pipe is d3=d1+10mm; 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. A flocculant feed pipe for a decanter centrifuge as claimed in claim 1 or 2, wherein the rectangular coordinate system is established by taking the feed direction of the material as the x direction, the feed direction of the flocculant as the y direction and the center of the interface between the elliptical nozzle and the flocculant delivery pipe as the origin, and the cross section of the outer wall of the elliptical nozzle is formed byAs determined by the equation of (2), x is more than 0 and less than 20, 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.
6. A flocculant feed pipe for a decanter centrifuge according to claim 1 or 2, wherein there are a total of 24 overflow holes with a pore size of 2mm at 60 ° intervals on the oval nozzle surface.
7. A flocculant feed pipe for a decanter centrifuge as claimed in claim 1 or 2, wherein the overflow aperture is a cylindrical through aperture.
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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110683621A CN110683621A (en) | 2020-01-14 |
| CN110683621B true CN110683621B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910972425.1A Active CN110683621B (en) | 2019-10-14 | 2019-10-14 | Flocculant feed pipe for horizontal decanter centrifuge |
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| CN110683621A (en) | 2020-01-14 |
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