CN108187394B - Device and method for adjusting height of screen mesh at filtering section of solid-liquid separator - Google Patents
Device and method for adjusting height of screen mesh at filtering section of solid-liquid separator Download PDFInfo
- Publication number
- CN108187394B CN108187394B CN201810096841.5A CN201810096841A CN108187394B CN 108187394 B CN108187394 B CN 108187394B CN 201810096841 A CN201810096841 A CN 201810096841A CN 108187394 B CN108187394 B CN 108187394B
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- Prior art keywords
- screen
- screen cloth
- rotary drum
- solid
- propeller
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- 239000007788 liquid Substances 0.000 title claims abstract description 27
- 238000001914 filtration Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 13
- 239000010959 steel Substances 0.000 claims abstract description 13
- 239000002245 particle Substances 0.000 claims description 27
- 239000007787 solid Substances 0.000 claims description 12
- 239000012065 filter cake Substances 0.000 claims description 9
- 239000000706 filtrate Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 12
- 238000000926 separation method Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/11—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
- B01D33/067—Construction of the filtering drums, e.g. mounting or sealing arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D33/00—Filters with filtering elements which move during the filtering operation
- B01D33/58—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element
- B01D33/62—Handling the filter cake in the filter for purposes other than for regenerating the filter cake remaining on the filtering element for drying
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention relates to a solid-liquid separator in the coal separation industry, in particular to a device and a method for adjusting the height of a screen mesh at a filtering section of the solid-liquid separator. Including discharge end pivot ring flange, screen cloth, rotary drum, set screw, connecting screw, terminal surface set screw and propeller, the screen cloth set up in the rotary drum upper end, the propeller set up in the rotary drum, discharge end pivot ring flange passes through terminal surface set screw and screen cloth screwed connection, be provided with the inlet pipe on the screen cloth, the inlet pipe is fixed in on the screen cloth through set screw, be provided with the steel sheet between screen cloth and the inlet pipe, steel sheet and inlet pipe screwed connection. The invention also discloses an adjusting method of the device for adjusting the height of the screen at the filtering section of the solid-liquid separator. The invention can meet the requirements of components, granularity, concentration and thickness of a filtering layer of various coal slime.
Description
Technical Field
The invention relates to a solid-liquid separator in the coal separation industry, in particular to a device and a method for adjusting the height of a screen mesh at a filtering section of the solid-liquid separator.
Background
The separation operation is one of important production links in many industrial departments such as metallurgy, coal, chemical industry, food processing and the like, the solid-liquid separator is applied to coal slime and flotation clean coal dehydration for years in a coal preparation plant, and the solid-liquid separator has the advantages of low product moisture, large processing capacity, small occupied area, no auxiliary equipment, simpler system, wide material concentration change range and the like. Plays an important role in realizing the reasonable utilization of coal resources, protecting the environment, creating economic benefits for coal enterprises and the like.
In the prior art, the adjustment of the screen of the filtering section of the solid-liquid separator is generally manual adjustment, the cost is increased because the screen is usually replaced or maintained in the operation process, and the screen of the solid-liquid separator in the prior art can not meet the requirement of the thickness of a filtering layer required by the change of the components, the granularity, the concentration and the like of various coal slime in the separation process.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a method for adjusting the height of a screen mesh at the filtering section of a solid-liquid separator, which are suitable for the requirements of components, granularity, concentration and thickness of a filtering layer of various coal slime.
In order to solve the technical problem, the device for adjusting the height of the screen cloth at the filtering section of the solid-liquid separator comprises a discharge end pivot flange plate, the screen cloth, a rotary drum, a fixing screw, a connecting screw, an end face fixing screw and a propeller, wherein the screen cloth is arranged at the upper end of the rotary drum, the propeller is arranged in the rotary drum, the discharge end pivot flange plate is connected with the screen cloth screw through the end face fixing screw, a feed pipe is arranged on the screen cloth and is fixed on the screen cloth through the fixing screw, a steel sheet is arranged between the screen cloth and the feed pipe, and the steel sheet is connected with the feed pipe screw.
Preferably, the method for realizing the screen height adjusting device at the filtering section of the solid-liquid separator comprises the steps that material pulp enters the middle of a rotating rotary drum from a feeding pipe, the pulp begins to settle under the action of centrifugal force, solid particles settle on the inner wall of the rotary drum, liquid passes through an overflow weir to form primary filtrate, a propeller which is the same as the rotary direction of the rotary drum but has a slightly lower speed is arranged in the rotary drum, the solid particles move forwards under the driving of the propeller, the steel sheet is adhered to the screen to adjust the height through a conical section in the rotary drum, the solid particles entering the screen are discharged through the screen under the action of the centrifugal force to form centrifugal liquid, and the solid particles continue to move forwards under the action of the propeller to be further dehydrated and discharged to a discharge port.
Preferably, the material entering the screen firstly forms a filter medium on the inner wall of the screen after discharging part of particles smaller than the size of the openings of the screen, when the size of the particles is larger than the aperture of the filter medium, a filter cake is formed, when the size of the particles is smaller than the aperture of the filter medium, part of the particles enter the pores of the filter medium at the beginning of filtration, the bridging phenomenon occurs rapidly, a small amount of particles pass through the filter medium and flow away with the filtrate, a filter cake layer is formed on the filter medium along with the gradual accumulation of the filter residues, and then the filter cake layer becomes an effective filter medium to obtain clear filtrate.
The device and the method for adjusting the height of the screen mesh at the filtering section of the solid-liquid separator have the following advantages: the invention has higher filter percentage open area and the minimum sieve sheet length with given filter degree, can reduce the downtime and cost without disassembling the rotating assembly, and avoid repairing or replacing the sieve sheet; in addition, the invention can provide a channel in the sieve sheet part for overhauling/repairing the damaged conveying section and other conveying components, and the thickness of the sieve sheet can be controlled by measuring the size from the inner wall of the perforated rotary drum to the top end of the spiral blade of the spiral conveyor through the gauge, so that the required thickness of the cake layer can be obtained; the invention also solves the problem that the existing screen can not adapt to the requirements of components, granularity, concentration and filter layer thickness of various coal slime, and the steel sheets are adhered to the outer framework nodes of the screen support plate, so that the clearance between the feeding screw and the screen sheet is effectively controlled under the condition that one set of screen sheet is adhered with steel sheets with different thicknesses, and the invention has the advantages of simple and practical operation and convenient maintenance and replacement.
Drawings
FIG. 1 is a schematic structural diagram of a device for adjusting the height of a screen at a filtering section of a solid-liquid separator according to the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, the device for adjusting the height of the screen cloth at the filtering section of the solid-liquid separator comprises a discharge end pivot flange 1, a screen cloth 2, a rotary drum 3, a fixing screw 4, a connecting screw 5, an end surface fixing screw 6 and a propeller 7, wherein the screen cloth 2 is arranged at the upper end of the rotary drum 3, the propeller 7 is arranged in the rotary drum 3, the discharge end pivot flange 1 is in screw connection with the screen cloth 2 through the end surface fixing screw 6, a feed pipe 8 is arranged on the screen cloth 2, the feed pipe 8 is fixed on the screen cloth 2 through the fixing screw 4, a steel sheet 9 is arranged between the screen cloth 2 and the feed pipe 8, and the steel sheet 9 is in screw connection with the feed pipe.
The invention is realized by the following method: the material slurry enters the middle part of the rotary drum 3 through the feeding pipe 8, the ore slurry begins to settle under the action of centrifugal force, solid particles settle on the inner wall of the rotary drum 3, liquid passes through the overflow weir to form primary filtrate, a propeller 7 which has the same rotating direction as the rotary drum 3 but has a slightly lower speed is arranged in the rotary drum 3, the solid particles move forward under the driving of the propeller 7, a steel sheet 9 is bonded on the screen mesh 2 to adjust the height through a conical section in the rotary drum 3, the solid particles entering the screen mesh 2 are discharged through the screen mesh 2 under the action of the centrifugal force to form centrifugal liquid, and the solid particles continue to move forward under the action of the propeller 7 to be further dehydrated and discharged to a discharge port.
The filter medium is formed on the inner wall of the screen 2 after the material entering the screen 2 is firstly discharged and part of particles smaller than the opening size of the screen 2 are discharged, when the particle size is larger than the aperture of the filter medium, a filter cake is formed, when the particle size is smaller than the aperture of the filter medium, part of particles enter the pore channel of the filter medium at the beginning of filtration, the bridging phenomenon occurs rapidly, a small amount of particles pass through the filter medium and flow away together with the filtrate, a filter cake layer is formed on the filter medium along with the gradual accumulation of the filter residues, and then the filter cake layer becomes an effective filter medium to obtain clear filtrate.
Wherein, the fixation of the screen 2 is divided into two types: radial fixation and end face fixation.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Claims (3)
1. A method for adjusting the height of a screen mesh at a filtering section of a solid-liquid separator is characterized by comprising the following steps: including discharge end pivot ring flange (1), screen cloth (2), rotary drum (3), set screw (4), terminal surface set screw (6) and propeller (7), screen cloth (2) set up in rotary drum (3) upper end, propeller (7) set up in rotary drum (3), discharge end pivot ring flange (1) is through terminal surface set screw (6) and screen cloth (2) screw connection, be provided with inlet pipe (8) on screen cloth (2), inlet pipe (8) are fixed in on screen cloth (2) through set screw (4), through pasting steel sheet (9) in the outer skeleton nodal point department of screen cloth layer board for on a set of screen cloth pasting under the condition of different thickness steel sheet (9), the clearance of effective control propeller (7) and screen cloth (2) to adjustment screen cloth (2) height.
2. The method for adjusting the height of a screen of a filtering section of a solid-liquid separator according to claim 1, wherein: the material slurry enters the middle part of a rotary drum (3) from a feeding pipe (8), the slurry begins to settle under the action of centrifugal force, solid particles settle on the inner wall of the rotary drum (3), liquid passes through an overflow weir to form primary filtrate, a propeller (7) which has the same rotating direction as the rotary drum (3) but has a slightly lower speed is arranged in the rotary drum (3), the solid particles move forwards under the drive of the propeller (7), the height of a screen (2) is adjusted through steel sheets (9) with different thicknesses through a conical section in the rotary drum (3), the solid particles entering the screen (2) are discharged under the action of centrifugal force, residual liquid is discharged through the screen (2) to form centrifugal liquid, and the solid particles continue to move forwards under the action of the propeller (7) to be further dehydrated and discharged to a discharge port.
3. The method for adjusting the height of a screen of a filtering section of a solid-liquid separator according to claim 1 or 2, wherein: the filter medium is formed on the inner wall of the screen (2) after partial particles smaller than the opening size of the screen (2) are discharged, when the particle size is larger than the aperture of the filter medium, a filter cake is formed, when the particle size is smaller than the aperture of the filter medium, partial particles enter the filter medium pore channel at the beginning of filtration, the bridging phenomenon occurs rapidly, a small amount of particles pass through the filter medium and flow away with the filtrate, a filter cake layer is formed on the filter medium along with the gradual accumulation of the filter residues, and then the filter cake layer becomes an effective filter medium to obtain clear filtrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096841.5A CN108187394B (en) | 2018-01-31 | 2018-01-31 | Device and method for adjusting height of screen mesh at filtering section of solid-liquid separator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810096841.5A CN108187394B (en) | 2018-01-31 | 2018-01-31 | Device and method for adjusting height of screen mesh at filtering section of solid-liquid separator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108187394A CN108187394A (en) | 2018-06-22 |
| CN108187394B true CN108187394B (en) | 2020-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810096841.5A Active CN108187394B (en) | 2018-01-31 | 2018-01-31 | Device and method for adjusting height of screen mesh at filtering section of solid-liquid separator |
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| Country | Link |
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| CN (1) | CN108187394B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201410414Y (en) * | 2009-06-03 | 2010-02-24 | 黄山华兰科技有限公司 | Novel horizontal spiral centrifuge |
| CN206597366U (en) * | 2017-01-20 | 2017-10-31 | 青岛银巢机械有限公司 | A kind of dirty solid-liquid separating machine of excrement |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK63196A (en) * | 1996-02-12 | 1997-08-13 | Povl Kaas | Endless band filter for microfiltration |
| JP3145935B2 (en) * | 1996-11-05 | 2001-03-12 | タナベウィルテック株式会社 | Cone type centrifuge |
| GB2505670A (en) * | 2012-09-06 | 2014-03-12 | Siemens Vai Metals Tech Gmbh | Dewatering slurry |
| CN106824745A (en) * | 2016-12-14 | 2017-06-13 | 安徽东健化工科技有限公司 | A kind of multiple drum-type seperator |
-
2018
- 2018-01-31 CN CN201810096841.5A patent/CN108187394B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201410414Y (en) * | 2009-06-03 | 2010-02-24 | 黄山华兰科技有限公司 | Novel horizontal spiral centrifuge |
| CN206597366U (en) * | 2017-01-20 | 2017-10-31 | 青岛银巢机械有限公司 | A kind of dirty solid-liquid separating machine of excrement |
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| Publication number | Publication date |
|---|---|
| CN108187394A (en) | 2018-06-22 |
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