CA2003768A1 - Device for chip washing - Google Patents
Device for chip washingInfo
- Publication number
- CA2003768A1 CA2003768A1 CA 2003768 CA2003768A CA2003768A1 CA 2003768 A1 CA2003768 A1 CA 2003768A1 CA 2003768 CA2003768 CA 2003768 CA 2003768 A CA2003768 A CA 2003768A CA 2003768 A1 CA2003768 A1 CA 2003768A1
- Authority
- CA
- Canada
- Prior art keywords
- chute
- tank
- chips
- outlet
- scrap
- Prior art date
- 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.)
- Abandoned
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/02—Pretreatment of the raw materials by chemical or physical means
- D21B1/023—Cleaning wood chips or other raw materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/62—Washing granular, powdered or lumpy materials; Wet separating by hydraulic classifiers, e.g. of launder, tank, spiral or helical chute concentrator type
- B03B5/626—Helical separators
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/02—Pretreatment of the finely-divided materials before digesting with water or steam
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Detergent Compositions (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
Abstract A chips washing device comprising a cylindric tank (1) provided upwardly with inlet for chips and water directly in front of a chute (2), which extends in screw-shape down-ward at least half a twirl along the inside of the tank (1).
The chute (2) is defined outwardly by the tank wall and inwardly by an edge (4), the height of which decreases downward along the chute. At the end of the chute adjacent the tank wall a scrap outlet (5) is located. The tank bottom slopes downward to a central outlet (7).
The chute (2) is defined outwardly by the tank wall and inwardly by an edge (4), the height of which decreases downward along the chute. At the end of the chute adjacent the tank wall a scrap outlet (5) is located. The tank bottom slopes downward to a central outlet (7).
Description
I 1;33~
22626~259 Device fox chip washing quiz invention relates to the washing of chips from wood material.
The manufacture of pulp normally proceeds from wood material, which was chipped to small pieces, so-called chips. With these chips also follow along heavy impurity its (scrap) such as rival metal pieces and the like.
These impurities must ye removed before the chips comma-icily or mechanically are disintegrated to pulp. This removal takes place in a so-called chip washer, which can be designed in different ways.
The washing of the chips usually is carried out in two steps, The first step comprises the removal of heavy impurities in a container, in which chips and water are stirred by a rotor provided with blades, whereby the impurities sink to the bottom. Thereafter sand and finer impurities are removed in a screw thickener.
Between these steps the chips are collected in a tank, from which they are pu~peG to the second step.
This conventional equipment hat its weakness, because MU at a smaller size and weight of the impurities the spear-anion is uncertain, due to the fact that the particles to ye separated are not caused to move to some separation zone, but are stirred together with the chips.
The present invention offers a solution of the aforesaid problem. By using a task equipped with a screw-shaped chute for chips and water the impurities can be separated along a relatively long sedimentation path and simultan-easily be affected by the centrifugal force. Chips and water, besides, are discharged continuously while at the same time the impurities ore concentrated and thereby their separation is facilitated.
The invention implies thaw the first separation step and the pump tank in a conventional arrangement can be , . . .. ... . . . . . ..
37~;~
replaced by a device, which can be connected directly to the subsequent thickener According to a broad aspect of the invention, there is disclosed a device for washing chips, comprising a cylindric Tenneco, which upwardly is provided with an inlet for chips and water and at its bottom with an outlet for washed chips, characterized in that a chute extends in screw-shape downward at least half a turn along the inside of the tank from the inlet, that the chute is defined outwardly by the tank wall and inwardly by an edge, the lo height of which decreases downward along the chute, that a scrap outlet is located at the end of the chute adjacent the tank wall, and that the tank bottom slopes down to the outlet, which is located centrally.
The invention is described in greater detail in the following, with reference to the accompanying drawing, in which:
Figure 1 is a section through a device according to the invention, and Figure 2 is a section II~II of the same device as shown in Figure l.
This embodiment of the invention comprises a cylindric tank l, the size of which, of course, depends on the desired capacity. The tank can have a diameter, for example of 1,5-3 m.
In its interior the tank is provided with a chute 2, which extends in the form of a screw slightly more than one turn about the tank wall. For achieving a satisfactory separation effect, the length of the chute 2 in the tank should be at least half a turn.
Preferably the length should be at least one turn. An inlet 3 2 2~1~376~3 for chips and water is located upwardly in the tank 1 at the upper end ox the chute 2. The chute is outwardly defined by the tank wall and inwardly ho an edge 4, the height of which decreases downward along the chute. The chute bottom is inclined outward to the tank wall, which inclination increases along the chute.
The chute can be steeper at the beginning. In its first part, preferably in its first quarter, the chute can also be provided with unevennesses or steps in the bottom, while its subsequent part should be smooth.
At the end of the chute adjacent the tan wall, a scrap outlet 5 is located. Said scrap outlet preferably is designed for interval discharge/ i.e. provided with two valves opening alternatingl~v. A water supply conduit 6 is connected to the scrap outlet 5 in order to bring about a counterfoil through the scrap outlet.
2~337G~3 The bottom of the tank l is shaped conically so as to slope down to a central outlet 7 for washed chips. About the outlet 7 possibly one or several additional annular scrap traps 8 can be arranged. In connection to these traps openings can be located for manual emptying.
The chips to be washed are supplied together with water through the inlet l down into the chute 2 and follow the chute downward. Heavy objects and particles are collected by sedimentation on the chute bottom. The separation of scrap is increased by action of the centrifugal force and by the fact, that the chute bottom is inclined outward to the tank wall. Unevennesses in the bottom of the first part of the chute and a steeper inclination promote the scrap removal in this part of the chute, while in the subsequent part of the chute sedimentation is desired.
it the same time as the impurities are directed to the bottom of the chute and outward to the tank wall, an overflow Or chips and water from the surface over the edge 4 takes place. This edge should have a continuously degrees-in height so dimensioned that only 30-50% of the incoming flow of chips and water remains at the end of the chute.
The impurities collected on the chute bottom adjacent the tank wall are removed through the scrap outlet 5. The counterfoil through the conduit 6 should be 0,1-0~2 m/s.
The flow of chips and water free of scrap is taken out through the outlet 7 and conveyed by means of a pump 9 to subsequent processing steps, which normally are thicken -in steps The additional scrap traps 8, which can be arranged about the central outlet, are a safety at extreme scrap loads which in exceptional cases can arise. Such loads may for example, occur when the chips are taken with a bottom scraping device of a chip bucket from a chip plane.
- 2~37~3 The invention of course, is not restricted to the embodim-en shown, but can be varied within the scope of the in-mention idea.
22626~259 Device fox chip washing quiz invention relates to the washing of chips from wood material.
The manufacture of pulp normally proceeds from wood material, which was chipped to small pieces, so-called chips. With these chips also follow along heavy impurity its (scrap) such as rival metal pieces and the like.
These impurities must ye removed before the chips comma-icily or mechanically are disintegrated to pulp. This removal takes place in a so-called chip washer, which can be designed in different ways.
The washing of the chips usually is carried out in two steps, The first step comprises the removal of heavy impurities in a container, in which chips and water are stirred by a rotor provided with blades, whereby the impurities sink to the bottom. Thereafter sand and finer impurities are removed in a screw thickener.
Between these steps the chips are collected in a tank, from which they are pu~peG to the second step.
This conventional equipment hat its weakness, because MU at a smaller size and weight of the impurities the spear-anion is uncertain, due to the fact that the particles to ye separated are not caused to move to some separation zone, but are stirred together with the chips.
The present invention offers a solution of the aforesaid problem. By using a task equipped with a screw-shaped chute for chips and water the impurities can be separated along a relatively long sedimentation path and simultan-easily be affected by the centrifugal force. Chips and water, besides, are discharged continuously while at the same time the impurities ore concentrated and thereby their separation is facilitated.
The invention implies thaw the first separation step and the pump tank in a conventional arrangement can be , . . .. ... . . . . . ..
37~;~
replaced by a device, which can be connected directly to the subsequent thickener According to a broad aspect of the invention, there is disclosed a device for washing chips, comprising a cylindric Tenneco, which upwardly is provided with an inlet for chips and water and at its bottom with an outlet for washed chips, characterized in that a chute extends in screw-shape downward at least half a turn along the inside of the tank from the inlet, that the chute is defined outwardly by the tank wall and inwardly by an edge, the lo height of which decreases downward along the chute, that a scrap outlet is located at the end of the chute adjacent the tank wall, and that the tank bottom slopes down to the outlet, which is located centrally.
The invention is described in greater detail in the following, with reference to the accompanying drawing, in which:
Figure 1 is a section through a device according to the invention, and Figure 2 is a section II~II of the same device as shown in Figure l.
This embodiment of the invention comprises a cylindric tank l, the size of which, of course, depends on the desired capacity. The tank can have a diameter, for example of 1,5-3 m.
In its interior the tank is provided with a chute 2, which extends in the form of a screw slightly more than one turn about the tank wall. For achieving a satisfactory separation effect, the length of the chute 2 in the tank should be at least half a turn.
Preferably the length should be at least one turn. An inlet 3 2 2~1~376~3 for chips and water is located upwardly in the tank 1 at the upper end ox the chute 2. The chute is outwardly defined by the tank wall and inwardly ho an edge 4, the height of which decreases downward along the chute. The chute bottom is inclined outward to the tank wall, which inclination increases along the chute.
The chute can be steeper at the beginning. In its first part, preferably in its first quarter, the chute can also be provided with unevennesses or steps in the bottom, while its subsequent part should be smooth.
At the end of the chute adjacent the tan wall, a scrap outlet 5 is located. Said scrap outlet preferably is designed for interval discharge/ i.e. provided with two valves opening alternatingl~v. A water supply conduit 6 is connected to the scrap outlet 5 in order to bring about a counterfoil through the scrap outlet.
2~337G~3 The bottom of the tank l is shaped conically so as to slope down to a central outlet 7 for washed chips. About the outlet 7 possibly one or several additional annular scrap traps 8 can be arranged. In connection to these traps openings can be located for manual emptying.
The chips to be washed are supplied together with water through the inlet l down into the chute 2 and follow the chute downward. Heavy objects and particles are collected by sedimentation on the chute bottom. The separation of scrap is increased by action of the centrifugal force and by the fact, that the chute bottom is inclined outward to the tank wall. Unevennesses in the bottom of the first part of the chute and a steeper inclination promote the scrap removal in this part of the chute, while in the subsequent part of the chute sedimentation is desired.
it the same time as the impurities are directed to the bottom of the chute and outward to the tank wall, an overflow Or chips and water from the surface over the edge 4 takes place. This edge should have a continuously degrees-in height so dimensioned that only 30-50% of the incoming flow of chips and water remains at the end of the chute.
The impurities collected on the chute bottom adjacent the tank wall are removed through the scrap outlet 5. The counterfoil through the conduit 6 should be 0,1-0~2 m/s.
The flow of chips and water free of scrap is taken out through the outlet 7 and conveyed by means of a pump 9 to subsequent processing steps, which normally are thicken -in steps The additional scrap traps 8, which can be arranged about the central outlet, are a safety at extreme scrap loads which in exceptional cases can arise. Such loads may for example, occur when the chips are taken with a bottom scraping device of a chip bucket from a chip plane.
- 2~37~3 The invention of course, is not restricted to the embodim-en shown, but can be varied within the scope of the in-mention idea.
Claims (6)
1. A device for washing chips, comprising a cylindric tank, which upwardly is provided with an inlet for chips and water and at its bottom with an outlet for washed chips, characterized in that a chute extends in screw-shape downward at least half a turn along the inside of the tank from the inlet, that the chute is defined outwardly by the tank wall and inwardly by an edge, the height of which decreases downward along the chute, that a scrap outlet is located at the end of the chute adjacent the tank wall, and that the tank bottom slopes down to the outlet, which is located centrally.
2. A device as defined in claim 1, characterized in that the bottom of the chute is inclined outward to the tank wall.
3. A device as defined in claim 2, characterized in that the inclination increases along the chute.
4. A device as defined in any one of claims 1,, 2 or 3, characterized in that the chute is steeper at the beginning nearest the inlet.
5. A device as defined in any one of claims 1, 2 or 3, characterized in that the first part of the chute, preferably the first quarter, at the bottom is provided with unevennesses or steps.
6. A device as defined in any one of claims 1, 2 or 3, characterized in that additional scrap traps are arranged annularly about the central outlet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8804261-9 | 1988-11-25 | ||
| SE8804261A SE462566B (en) | 1988-11-25 | 1988-11-25 | DEVICE FOR WASHING THE TIP |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2003768A1 true CA2003768A1 (en) | 1990-05-25 |
Family
ID=20374062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2003768 Abandoned CA2003768A1 (en) | 1988-11-25 | 1989-11-24 | Device for chip washing |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0445143A1 (en) |
| JP (1) | JPH04501891A (en) |
| AU (1) | AU4522189A (en) |
| CA (1) | CA2003768A1 (en) |
| FI (1) | FI912523A0 (en) |
| NZ (1) | NZ231500A (en) |
| SE (1) | SE462566B (en) |
| WO (1) | WO1990006394A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4857094B2 (en) * | 2006-12-01 | 2012-01-18 | 前澤工業株式会社 | Sand settling equipment |
| CN114180343A (en) * | 2021-10-29 | 2022-03-15 | 淮北矿业股份有限公司 | Method for improving ash conveying system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL153080B (en) * | 1949-07-14 | Gundernhausen Chemie | PROCESS OF MANUFACTURING FLOOR COVERING MATERIAL AND FLOOR COVERING MATERIAL THEREFORE. | |
| US3765532A (en) * | 1971-07-12 | 1973-10-16 | Rex Chainbelt Inc | Wood chip washer |
| NZ207756A (en) * | 1983-04-13 | 1986-01-24 | Mineral Deposits Ltd | Spiral separator:deflecting layer over concentrate layer |
-
1988
- 1988-11-25 SE SE8804261A patent/SE462566B/en not_active IP Right Cessation
-
1989
- 1989-11-20 AU AU45221/89A patent/AU4522189A/en not_active Abandoned
- 1989-11-20 WO PCT/SE1989/000669 patent/WO1990006394A1/en not_active Application Discontinuation
- 1989-11-20 JP JP51172989A patent/JPH04501891A/en active Pending
- 1989-11-20 EP EP19890912677 patent/EP0445143A1/en not_active Withdrawn
- 1989-11-23 NZ NZ23150089A patent/NZ231500A/en unknown
- 1989-11-24 CA CA 2003768 patent/CA2003768A1/en not_active Abandoned
-
1991
- 1991-05-24 FI FI912523A patent/FI912523A0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| AU4522189A (en) | 1990-06-26 |
| SE462566B (en) | 1990-07-16 |
| EP0445143A1 (en) | 1991-09-11 |
| WO1990006394A1 (en) | 1990-06-14 |
| NZ231500A (en) | 1991-07-26 |
| SE8804261A (en) | 1988-11-25 |
| FI912523A0 (en) | 1991-05-24 |
| SE8804261D0 (en) | 1988-11-25 |
| JPH04501891A (en) | 1992-04-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |