CA1120895A - Hydrocyclone with dilution liquid inlet in a compound heavies outlet chamber thereof - Google Patents
Hydrocyclone with dilution liquid inlet in a compound heavies outlet chamber thereofInfo
- Publication number
- CA1120895A CA1120895A CA000322680A CA322680A CA1120895A CA 1120895 A CA1120895 A CA 1120895A CA 000322680 A CA000322680 A CA 000322680A CA 322680 A CA322680 A CA 322680A CA 1120895 A CA1120895 A CA 1120895A
- Authority
- CA
- Canada
- Prior art keywords
- chamber
- cyclone
- collecting
- foreign matters
- equipment
- 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.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
- D21D5/24—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force in cyclones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/12—Construction of the overflow ducting, e.g. diffusing or spiral exits
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/14—Construction of the underflow ducting; Apex constructions; Discharge arrangements ; discharge through sidewall provided with a few slits or perforations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Cyclones (AREA)
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
HYDROCYCLONE WITH-DILUTION LIQUID INLET IN
A COMPOUND HEAVIES OUTLET CHAMBER THEREOF
ABSTRACT OF THE DISCLOSURE
Equipment for continuously separating foreign matters from unpurified liquid papermaking materials. Cyclone separators are disposed radially around and equidistantly from a central structure. Each of these cyclone separators has a chamber for collecting purified liquid papermaking materials, a cyclone chamber for separating liquid papermaking materials, and a cyclone vortex chamber for separating heavy foreign matters further into relatively light foreign matters and relatively heavy foreign matters, these chambers being disposed in this order from above. The central structure is partitioned into intermediate chambers. Main pipes enter respective intermediate chambers which are connected by branch pipes to the chambers of all the cyclone separators. A pressurized fresh water supply pipe is tangentially connected to the upper portion of the cyclone vortex chamber. A re-collecting port is provided at the center of the bottom of the vortex chamber. A portion of the bottom around the re-collecting port is made lower than the re-collecting port and an outlet pipe for waste is connected to this portion. A pressure balance is maintained near the bottom of the cyclone chamber between the clear water in the vortex chamber and the material in the cyclone chamber. In this way the papermaking material on the border is diluted.
A COMPOUND HEAVIES OUTLET CHAMBER THEREOF
ABSTRACT OF THE DISCLOSURE
Equipment for continuously separating foreign matters from unpurified liquid papermaking materials. Cyclone separators are disposed radially around and equidistantly from a central structure. Each of these cyclone separators has a chamber for collecting purified liquid papermaking materials, a cyclone chamber for separating liquid papermaking materials, and a cyclone vortex chamber for separating heavy foreign matters further into relatively light foreign matters and relatively heavy foreign matters, these chambers being disposed in this order from above. The central structure is partitioned into intermediate chambers. Main pipes enter respective intermediate chambers which are connected by branch pipes to the chambers of all the cyclone separators. A pressurized fresh water supply pipe is tangentially connected to the upper portion of the cyclone vortex chamber. A re-collecting port is provided at the center of the bottom of the vortex chamber. A portion of the bottom around the re-collecting port is made lower than the re-collecting port and an outlet pipe for waste is connected to this portion. A pressure balance is maintained near the bottom of the cyclone chamber between the clear water in the vortex chamber and the material in the cyclone chamber. In this way the papermaking material on the border is diluted.
Description
11~08gS
The present invention relates to equipment for continuously separating foreign matters from unpurified liqlaid papermaking materials.
Unpurified liquid papermaking materials contain unnecessary things besides fibers. Recently in particular, such unnecessary things have become more and more diversi-fied because papermaking materials have become richer in variety and utilization has been made of, for instance, waste-paper. There has been almost no equipment that can remove all these diversified foreign matters at one time. Previous efforts to cope with the diversification of foreign matters have included the separate use of two different types of e~uipment, one for removing light foreign matters and the other for removing heavy foreign matters. This has had disadvantages that it involves a great cost for equipment and needs a large space therefor. On the other hand, cyclone separators are limited in size because of their function. Therefore, several cyclone separators have been used at the same time if liquid papermaking materials are to be handled in quantity. Also in this case, the above-mentioned disadvantages have been lnevitable. Furthermore, the cyclone separators have been arranged in a row and pipes for the supply of liquid papermaking materials, etc. have ; branched off to them, but the distances between the branch point and the cyclone separators have been different.
Therefore, even if the cyPlone separators are adjusted to the same operating conditions, they have not always per-formed uniform separating action and they have often given uneven purification. To obtain uniform purification, each cyclone separator has had to be adjusted individually.
This adjustment has been very difficult to make, and it has been impossible to make it perfectly. As a result, it 8gS
has been impossible to purify liquid papermaking materials satisfactorily.
It is therefore a main object of this invention to provide equipmentwhich obviates at least some of the above-mentioned disadvantages.
It is another object of this invention to provide equipment which effectively removes heavy foreign matters from unpurified liquid papermaking material9.
It is still another specific object of this invention to provide equipment~hich further separates the heavy foreign matters into relatively light matters and relatively heavy matters.
It is an additional object of this invention to provide equipment which collects said relatively light foreign matters and puts them in new liquid papermaking materials to be purified in order to obtain a better yield.
It is an additional object of this invention to provide equipment which re-collects foreign matters in a uniform ,.
state.
According to the invention, equipment for separating foreign matters from liquid papermaking materials comprises .. . .
cyclone separators disposed so as to form a.single ~tage, each separator compri~ing a separator body, a first supply pipe for supplying liquid papermaking materials tangentially connected to the upper portion of said separator body, a coliecting chamber for liquid papermaking materials dispo9ed at the top of said separator body, a collecting pipe extending out of said collecting chamber, a cyclone vortex chamber having a bottom and disposed under said separator body, a second supply pipe for providing fresh water under pressure and connected tang-enti~lly to the upper portion of said vortex chamber, a ,~.,,,,~
The present invention relates to equipment for continuously separating foreign matters from unpurified liqlaid papermaking materials.
Unpurified liquid papermaking materials contain unnecessary things besides fibers. Recently in particular, such unnecessary things have become more and more diversi-fied because papermaking materials have become richer in variety and utilization has been made of, for instance, waste-paper. There has been almost no equipment that can remove all these diversified foreign matters at one time. Previous efforts to cope with the diversification of foreign matters have included the separate use of two different types of e~uipment, one for removing light foreign matters and the other for removing heavy foreign matters. This has had disadvantages that it involves a great cost for equipment and needs a large space therefor. On the other hand, cyclone separators are limited in size because of their function. Therefore, several cyclone separators have been used at the same time if liquid papermaking materials are to be handled in quantity. Also in this case, the above-mentioned disadvantages have been lnevitable. Furthermore, the cyclone separators have been arranged in a row and pipes for the supply of liquid papermaking materials, etc. have ; branched off to them, but the distances between the branch point and the cyclone separators have been different.
Therefore, even if the cyPlone separators are adjusted to the same operating conditions, they have not always per-formed uniform separating action and they have often given uneven purification. To obtain uniform purification, each cyclone separator has had to be adjusted individually.
This adjustment has been very difficult to make, and it has been impossible to make it perfectly. As a result, it 8gS
has been impossible to purify liquid papermaking materials satisfactorily.
It is therefore a main object of this invention to provide equipmentwhich obviates at least some of the above-mentioned disadvantages.
It is another object of this invention to provide equipment which effectively removes heavy foreign matters from unpurified liquid papermaking material9.
It is still another specific object of this invention to provide equipment~hich further separates the heavy foreign matters into relatively light matters and relatively heavy matters.
It is an additional object of this invention to provide equipment which collects said relatively light foreign matters and puts them in new liquid papermaking materials to be purified in order to obtain a better yield.
It is an additional object of this invention to provide equipment which re-collects foreign matters in a uniform ,.
state.
According to the invention, equipment for separating foreign matters from liquid papermaking materials comprises .. . .
cyclone separators disposed so as to form a.single ~tage, each separator compri~ing a separator body, a first supply pipe for supplying liquid papermaking materials tangentially connected to the upper portion of said separator body, a coliecting chamber for liquid papermaking materials dispo9ed at the top of said separator body, a collecting pipe extending out of said collecting chamber, a cyclone vortex chamber having a bottom and disposed under said separator body, a second supply pipe for providing fresh water under pressure and connected tang-enti~lly to the upper portion of said vortex chamber, a ,~.,,,,~
2--11;~08~S
re-collecting port provided at the center of said bottom of said vortex chamber, said bottom having a portion around said re-collecting port lower than said re-collecting port, and an outlet pipe for waste connected to said portion.
In the drawings, Fig. 1 is a side view illustrating an embodiment of ~he present invention.
Fig. 2 is a plan view illustrating the same.
Fig. 3 is an enlarged side view, partly in vertical section, of equipment of the invention.
The present invention will now be described with reference to embodiments illustrated in the drawings. In Fi~s.l and 2, numeral 1 represents a cyclone separator.
A plurality of cyclone separators (six in Fig~ 2) are lS disposed, for instance, radially around and equidistantly from a central structure 2. Referring first to the cyclone separator 1, this has a separator body 3 tapering toward the bottom, and a supply pipe 4 for liquid papermaking materials is tangentially connected to its upper portion.
An exhaust pipe 5 for light foreign matters comes from above into the upper central portion of a cyclone chamber 3a with its open end positioned slightly lower than the above-mentioned supply pipe 4 for liquid papermaking materials. A collecting chamber 6 for liquid papermaking materials is diposed at the top of the separator body 3, and is connected to the cyclone chamber 3a by a collecting nozzle 7 which surrounds said exhaust pipe 5 for light foreign matters. By the way, the exhaust pipe 5, which is provided for removing light foreign matters as mentioned later, is not necessarily essential to this invention. This is because of the fact that, in some kinds of liquid paper-~;J~
,
re-collecting port provided at the center of said bottom of said vortex chamber, said bottom having a portion around said re-collecting port lower than said re-collecting port, and an outlet pipe for waste connected to said portion.
In the drawings, Fig. 1 is a side view illustrating an embodiment of ~he present invention.
Fig. 2 is a plan view illustrating the same.
Fig. 3 is an enlarged side view, partly in vertical section, of equipment of the invention.
The present invention will now be described with reference to embodiments illustrated in the drawings. In Fi~s.l and 2, numeral 1 represents a cyclone separator.
A plurality of cyclone separators (six in Fig~ 2) are lS disposed, for instance, radially around and equidistantly from a central structure 2. Referring first to the cyclone separator 1, this has a separator body 3 tapering toward the bottom, and a supply pipe 4 for liquid papermaking materials is tangentially connected to its upper portion.
An exhaust pipe 5 for light foreign matters comes from above into the upper central portion of a cyclone chamber 3a with its open end positioned slightly lower than the above-mentioned supply pipe 4 for liquid papermaking materials. A collecting chamber 6 for liquid papermaking materials is diposed at the top of the separator body 3, and is connected to the cyclone chamber 3a by a collecting nozzle 7 which surrounds said exhaust pipe 5 for light foreign matters. By the way, the exhaust pipe 5, which is provided for removing light foreign matters as mentioned later, is not necessarily essential to this invention. This is because of the fact that, in some kinds of liquid paper-~;J~
,
3 --ll;~O~S
making materials, light foreign matters have almost no ill effect and do not have to be removed. What is necessary in this connection is only to take out heavy foreign matters that have a harmful effect and further separate them into two parts: relatively light matters and relatively heavy matters. A collecting pipe 8 extends tangentially, for instance, out of the collecting chamber 6. The routes of the collecting pipe 8 and exhaust pipe 5 will be described later.
Referring next to a cyclone vortex chamber 9 disposed under the separator body 3, this is substantially cylindrical in shape and is connected at its central top to the cyclone chamber3a. A pressurized fresh water supply pipe 10 enters the cyclone vortex chamber 9 tangentially at its upper portion. The bottom of the cyclone vortex chamber 9 has a re-collecting port 11 at the center, an accumulating portion 12 for waste disposed around and slightly lower than the re-collecting port 11, and an outlet port 15 is connected to the outlet port 13. Incidentally, each of these pipes is fitted with a valve halfway in a conventional manner.
Referring now to the aforesaid central structure 2, this is a hollow structure with, for instance, a circùlar cross section, and is partitioned into a plurality of intermediate chambers 20 disposed one on top of the other. These intermediate chambers 20, provided with letters a, b, c ---for indentification, are arranged, for instance, in the following order from the top: an intermediate chamber 20a for accumulating light foreign matters, intermediate chamber 20b for distributing liquid papermaking materials, intermed-iate chamber 20c for supplying pressurized clear water, intermediate chamber 20d for re-collection, and intermediate chamber 20e for outlet. A collecting intermediate tank 21
making materials, light foreign matters have almost no ill effect and do not have to be removed. What is necessary in this connection is only to take out heavy foreign matters that have a harmful effect and further separate them into two parts: relatively light matters and relatively heavy matters. A collecting pipe 8 extends tangentially, for instance, out of the collecting chamber 6. The routes of the collecting pipe 8 and exhaust pipe 5 will be described later.
Referring next to a cyclone vortex chamber 9 disposed under the separator body 3, this is substantially cylindrical in shape and is connected at its central top to the cyclone chamber3a. A pressurized fresh water supply pipe 10 enters the cyclone vortex chamber 9 tangentially at its upper portion. The bottom of the cyclone vortex chamber 9 has a re-collecting port 11 at the center, an accumulating portion 12 for waste disposed around and slightly lower than the re-collecting port 11, and an outlet port 15 is connected to the outlet port 13. Incidentally, each of these pipes is fitted with a valve halfway in a conventional manner.
Referring now to the aforesaid central structure 2, this is a hollow structure with, for instance, a circùlar cross section, and is partitioned into a plurality of intermediate chambers 20 disposed one on top of the other. These intermediate chambers 20, provided with letters a, b, c ---for indentification, are arranged, for instance, in the following order from the top: an intermediate chamber 20a for accumulating light foreign matters, intermediate chamber 20b for distributing liquid papermaking materials, intermed-iate chamber 20c for supplying pressurized clear water, intermediate chamber 20d for re-collection, and intermediate chamber 20e for outlet. A collecting intermediate tank 21
- 4 1~4)895 is provided at the top of the central structure 2. All the collecting pipes 8 from all the cyclone separators 1 enter the collecting intermediate ~ank 21, while a main collect-ing pipe 22 is connected to it at its central top. The S intermediate chamber 20a under the collecting intermediate tank 21 is connected both to all the exhaust pipes 5 for light foreign matters extending from all the cyclone separators 1 and to a main exhaust pipe 23 for light foreign matters.
The intermediate chamber 20b for distributing liquid papermaking materials located under the intermediate chamber 20a is connected both to all the supply pipes 4 for liquid papermaking materials extending to all the cyclone separators 1 and to a main supply pipe 24 for liquid papermaking materials. An elbow is used to connect the main supply pipe 24 to the intermediate chamber 20b in an embodiment of this invention illustrated in Fig. 3, but they may be connected together in other ways, such as connecting a straight pipe directly to the intermediate chamber 20b, according to the pressure, velocity of flow, etc. of liquid papermaking materials. The intermediate chamber 20c for supplying pressurized clear water located under the inter-mediate chamber 20b is connected both to all the pressurized clear water supply pipes 10 extending to all the cyclone separators 1 and to a main pressurized clear water supply pipe 25. The intermediate chamber 20d for re-collection located under the intermediate chamber 20c is connected both to all the re-collecting pipes 14 from all the cyclone separators I and to a main re-collecting pipe 26. The main re-collecting pipe 26 is connected to the main supply pipe 24 for liquid papermaking materials as required.
All the outlet pipes 15 from all the cyclone separators 1 are connected to the intermediate chamber 20e for outlet, 112~)89S
and a main outlet pipe 27 is connected to it at its bottom.
Most of the things taken out of the cyclone.
vortex chamber 9 are heavy foreign matters. In the case of liquid papermaking materials, however, such heavy foreign matters may contain useful materials and therefore they need to be further separated and purified. Relat~vely light matters in the heavy foreign matters are taken out through the re-collecting port 11 and, as mentioned above, put in new liquid papermaking materials for further separation.
On the other hand, relatively heavy matters in the heavy foreign matters are taken out through the outlet pQrt 13 and, as shown in Fig. 3, further separated and purified to increase yield. The latter function is performed by secondary cyclone separators 1', about the same in construct-ion as the aforesaid cyclone separator 1, which areconnected so as to form subsequent stage or stages for m~ltistage operation. Each of the secondary cyclone separators ; 1' is connected to the end of the main outlet pipe 27 by a supply pipe 4' which enters a separator body 3'. By the way, each part of the secondary cyclone separator 1' is , represented by the same numeral, with a prime ('), as the cyclone separator 1 because these separators are about the same in construction. The secondary cyclone separator 1' differs from the cyclone separator 1 in the following points:
The secondary cyclone separator 1' in the embodiment illustrated in Fig. 3 does not have a means of removing light foreign matters because materials separated by it contain almost no light foreign matters. Also it has a sedimentation tank 28 for heavy foreign matters to which an outlet pipe 15' for heavy foreign matters is connected.
~ ~ - 6 -The equipment describe~ above separates foreign matters from liquid papermaking materials as follows: By proper value operations, liquid papermaking material is sent through the main supply pipe 24 to the intermediate chamber 20b from which it is distributed through ~he supply pipe 4 to each cyclone separator 1. The ~iquid papermaking material enters the cyclone chamber 3a tangentially, and therefore in the cyclone chamber 3a it comes down in a whirl. Light foreign matters concentrate in the center of the vortex, move up with the flow, pass through the exhaust pipe 5, enter the inter-mediate chamber 20a for accumulating light foreign matters, and come out of the equipment. On the other hand, heavy foreign matters sink down, come out of the cyclone chamber 3a and enter the cyclone vortex chamber 9.
Referring in detail to the last step, pressuri~ed clear water is sent into the cyclone vortex chamber 9, and pressure balance is maintained near the bottom of the cyclone chamber 3a between the clear water in the cyclone vortex chamber 9 and the liquid papermaking material in the cyclone chamber 3a. The liquid papermaking material on the border is diluted, and only heavy foreign matters with large specific gravity separate from the liquid papermaking material and drop into the cyclone vortex chamber 9.
In the cyclone vortex chamber 9, the clear water sent in under pressure through the pressurized clear water supply pipe 10 forms a vortex, ~hich concentrates relatively light matters in the heavy foreign matters to its center and gathers relatively heavy matters on the circumference of the bottom. The relatively light matters in the heavy for-eign matters enter the re-collecting port 11, pass through the re-collecting pipe 14, and come into the intermediate chamber 20d for re-collection. In the chamber 20d they ~i 11'~0895 mix with similar matter from other cyclone separators 1.
The mixture then moves into the main re-collecting pipe 26 and enters the main supply pipe 24 again. On the other hand, the relatively heavy matters in the heavy foreign matters come out through the outlet port 13 and enter the intermediate chamber 20e for outlet. In the chamber 20e they mix with heavy matter from other cyclone separators 1.
The heavy matter mixture is then sent to secondary cyclone separators 1' to undergo similar separation and purification again. In the meanwhile, liquid papermaking material, from which foreign matter~ have thus been removed, comes out through the collecting nozzle 7, provided at the top of the cyclone chamber 3a, into the collecting chamber 6, and moves through the collecting pipe 8 into the collecting intermediate tank 21 at the top of the ¢entral structure 2, where it mixes with liquid papermaking material from other cyclone separators 1. Then the mixture comes out through the main collecting pipe 22.
The present invention so far described in detail has ~ 20 the following advantages. Heavy foreign matters and light foreign matters are properly separated both from liquid papermaking materials and from each other because the cyclone separator has both the cyclone chamber and cyclone vortex chamber. The heavy foreign matters are further separated in the cycIone vortex chamber and part of them are re-collected and put in new liquid papermaking material to be purified, so that a larger recovery percentage of useful materials and better yield are obtained. It is possible to further increase the accuracy of separation by taking out the heaviest foreign matters and putting them in secondary cyclone separators.
In addition, a plurality of cyclone separators are disposed radially around the central structure which is partitioned into intermediate chambers. All their pipes, such as the supply pipes, exhaust pipes, re-collecting pipes and outlet pipes, enter respective intermediate chambers which are connected to main pipes such as the main collecting pipe, main exhaust pipe and main supply pipe.
This means that all materials are completely mixed in their respective intermediate chambers and they are supplied to the cyclone separators and taken out from the equipment in a uniform state.
Furthermore, where the intermediate chambers are provided inside the central structure, it is possible to make the whole apparatus small and to decrease the number of its parts.
Many different embodiments of this invention may be made without departing from the spirit and scope thereof.
It is to be understood that the invention is not limited to the specific embod~i~ents described above.
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The intermediate chamber 20b for distributing liquid papermaking materials located under the intermediate chamber 20a is connected both to all the supply pipes 4 for liquid papermaking materials extending to all the cyclone separators 1 and to a main supply pipe 24 for liquid papermaking materials. An elbow is used to connect the main supply pipe 24 to the intermediate chamber 20b in an embodiment of this invention illustrated in Fig. 3, but they may be connected together in other ways, such as connecting a straight pipe directly to the intermediate chamber 20b, according to the pressure, velocity of flow, etc. of liquid papermaking materials. The intermediate chamber 20c for supplying pressurized clear water located under the inter-mediate chamber 20b is connected both to all the pressurized clear water supply pipes 10 extending to all the cyclone separators 1 and to a main pressurized clear water supply pipe 25. The intermediate chamber 20d for re-collection located under the intermediate chamber 20c is connected both to all the re-collecting pipes 14 from all the cyclone separators I and to a main re-collecting pipe 26. The main re-collecting pipe 26 is connected to the main supply pipe 24 for liquid papermaking materials as required.
All the outlet pipes 15 from all the cyclone separators 1 are connected to the intermediate chamber 20e for outlet, 112~)89S
and a main outlet pipe 27 is connected to it at its bottom.
Most of the things taken out of the cyclone.
vortex chamber 9 are heavy foreign matters. In the case of liquid papermaking materials, however, such heavy foreign matters may contain useful materials and therefore they need to be further separated and purified. Relat~vely light matters in the heavy foreign matters are taken out through the re-collecting port 11 and, as mentioned above, put in new liquid papermaking materials for further separation.
On the other hand, relatively heavy matters in the heavy foreign matters are taken out through the outlet pQrt 13 and, as shown in Fig. 3, further separated and purified to increase yield. The latter function is performed by secondary cyclone separators 1', about the same in construct-ion as the aforesaid cyclone separator 1, which areconnected so as to form subsequent stage or stages for m~ltistage operation. Each of the secondary cyclone separators ; 1' is connected to the end of the main outlet pipe 27 by a supply pipe 4' which enters a separator body 3'. By the way, each part of the secondary cyclone separator 1' is , represented by the same numeral, with a prime ('), as the cyclone separator 1 because these separators are about the same in construction. The secondary cyclone separator 1' differs from the cyclone separator 1 in the following points:
The secondary cyclone separator 1' in the embodiment illustrated in Fig. 3 does not have a means of removing light foreign matters because materials separated by it contain almost no light foreign matters. Also it has a sedimentation tank 28 for heavy foreign matters to which an outlet pipe 15' for heavy foreign matters is connected.
~ ~ - 6 -The equipment describe~ above separates foreign matters from liquid papermaking materials as follows: By proper value operations, liquid papermaking material is sent through the main supply pipe 24 to the intermediate chamber 20b from which it is distributed through ~he supply pipe 4 to each cyclone separator 1. The ~iquid papermaking material enters the cyclone chamber 3a tangentially, and therefore in the cyclone chamber 3a it comes down in a whirl. Light foreign matters concentrate in the center of the vortex, move up with the flow, pass through the exhaust pipe 5, enter the inter-mediate chamber 20a for accumulating light foreign matters, and come out of the equipment. On the other hand, heavy foreign matters sink down, come out of the cyclone chamber 3a and enter the cyclone vortex chamber 9.
Referring in detail to the last step, pressuri~ed clear water is sent into the cyclone vortex chamber 9, and pressure balance is maintained near the bottom of the cyclone chamber 3a between the clear water in the cyclone vortex chamber 9 and the liquid papermaking material in the cyclone chamber 3a. The liquid papermaking material on the border is diluted, and only heavy foreign matters with large specific gravity separate from the liquid papermaking material and drop into the cyclone vortex chamber 9.
In the cyclone vortex chamber 9, the clear water sent in under pressure through the pressurized clear water supply pipe 10 forms a vortex, ~hich concentrates relatively light matters in the heavy foreign matters to its center and gathers relatively heavy matters on the circumference of the bottom. The relatively light matters in the heavy for-eign matters enter the re-collecting port 11, pass through the re-collecting pipe 14, and come into the intermediate chamber 20d for re-collection. In the chamber 20d they ~i 11'~0895 mix with similar matter from other cyclone separators 1.
The mixture then moves into the main re-collecting pipe 26 and enters the main supply pipe 24 again. On the other hand, the relatively heavy matters in the heavy foreign matters come out through the outlet port 13 and enter the intermediate chamber 20e for outlet. In the chamber 20e they mix with heavy matter from other cyclone separators 1.
The heavy matter mixture is then sent to secondary cyclone separators 1' to undergo similar separation and purification again. In the meanwhile, liquid papermaking material, from which foreign matter~ have thus been removed, comes out through the collecting nozzle 7, provided at the top of the cyclone chamber 3a, into the collecting chamber 6, and moves through the collecting pipe 8 into the collecting intermediate tank 21 at the top of the ¢entral structure 2, where it mixes with liquid papermaking material from other cyclone separators 1. Then the mixture comes out through the main collecting pipe 22.
The present invention so far described in detail has ~ 20 the following advantages. Heavy foreign matters and light foreign matters are properly separated both from liquid papermaking materials and from each other because the cyclone separator has both the cyclone chamber and cyclone vortex chamber. The heavy foreign matters are further separated in the cycIone vortex chamber and part of them are re-collected and put in new liquid papermaking material to be purified, so that a larger recovery percentage of useful materials and better yield are obtained. It is possible to further increase the accuracy of separation by taking out the heaviest foreign matters and putting them in secondary cyclone separators.
In addition, a plurality of cyclone separators are disposed radially around the central structure which is partitioned into intermediate chambers. All their pipes, such as the supply pipes, exhaust pipes, re-collecting pipes and outlet pipes, enter respective intermediate chambers which are connected to main pipes such as the main collecting pipe, main exhaust pipe and main supply pipe.
This means that all materials are completely mixed in their respective intermediate chambers and they are supplied to the cyclone separators and taken out from the equipment in a uniform state.
Furthermore, where the intermediate chambers are provided inside the central structure, it is possible to make the whole apparatus small and to decrease the number of its parts.
Many different embodiments of this invention may be made without departing from the spirit and scope thereof.
It is to be understood that the invention is not limited to the specific embod~i~ents described above.
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Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Equipment for separating foreign matters from liquid papermaking materials comprising cyclone separators disposed so as to form a single stage, each separator comprising a separator body, a first supply pipe for supplying liquid papermaking materials tangentially connected to the upper portion of said separator body, a collecting chamber for liquid papermaking materials disposed at the top of said separator body, a collecting pipe extending out of said collecting chamber, a cyclone vortex chamber having a bottom and disposed under said separator body, a second supply pipe for providing fresh water under pressure and connected tangentially to the upper portion of said vortex chamber, a re-collecting port provided at the center of said bottom of said vortex chamber, said bottom having a portion around said re-collecting port lower than said re-collecting port, and an outlet pipe for waste connected to said portion.
2. Equipment as claimed in Claim 1, wherein said cyclone separators are disposed radially and said pipes branch off equidistantly from respective main pipes.
3. Equipment as claimed in Claim 2, wherein said cyclone separators are disposed around a central structure partitioned into a plurality of intermediate chambers from which said pipes branch off respectively and to which said main pipes are connected respectively.
4. Equipment as claimed in Claim 1, 2, or 3, wherein each of said cyclone separators is provided with an exhaust pipe for light foreign matters the open end of which is located at the upper central position of a cyclone chamber and slightly lower than said first supply pipe.
5. Equipment as claimed in Claim 1, 2, or 3, wherein said re-collecting port is connected by a re-collecting pipe to an intermediate chamber for re-collection which chamber is further connected by a main re-collecting pipe to a main supply pipe.
6. Equipment as claimed in Claim 1, 2, or 3, wherein said outlet pipe is connected to an intermediate chamber for outlet from which a main outlet pipe extends and branches off to secondary cyclone separators having a construction similar to the first mentioned separators and connected so as to form a subsequent stage.
7. Equipment as claimed in Claim 1, 2, or 3 including secondary cyclone separators having a construction similar to the first mentioned separators and connected so as to form a subsequent stage.
8. Equipment as claimed in Claim 1, 2, or 3 including secondary cyclone separators connected to treat the waste passing out each outlet pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8234778A JPS5512831A (en) | 1978-07-06 | 1978-07-06 | Debris sorting apparatus from paper making stock |
| JP82347/1978 | 1978-07-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1120895A true CA1120895A (en) | 1982-03-30 |
Family
ID=13772026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000322680A Expired CA1120895A (en) | 1978-07-06 | 1979-03-02 | Hydrocyclone with dilution liquid inlet in a compound heavies outlet chamber thereof |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5512831A (en) |
| CA (1) | CA1120895A (en) |
| DE (1) | DE2926751C2 (en) |
| GB (1) | GB2024664B (en) |
| MX (1) | MX148959A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1137925A (en) * | 1980-04-01 | 1982-12-21 | Johannes J. Richters | Header arrangement for hydrocyclones having concentric accept outlet arrangements |
| GB8327218D0 (en) * | 1983-10-12 | 1983-11-16 | Beloit Corp | Reject handling in cyclones &c |
| DE4334527A1 (en) * | 1993-10-09 | 1995-04-13 | Voith Gmbh J M | Vortex flow separators |
| DE4342289A1 (en) * | 1993-12-11 | 1995-06-14 | Hans Joachim Dr Ing Schultz | Method and device for continuously separating desired from undesired substances contained in a substance suspension |
| GB9419484D0 (en) * | 1994-09-28 | 1994-11-16 | Serck Baker Ltd | Treatment of particulate material |
| SE9702913D0 (en) * | 1997-08-12 | 1997-08-12 | Kvaerner Pulping Tech | sand trap |
| US8875903B2 (en) * | 2007-03-19 | 2014-11-04 | Palo Alto Research Center Incorporated | Vortex structure for high throughput continuous flow separation |
| FI123139B (en) * | 2011-09-07 | 2012-11-30 | Andritz Oy | Latch unit in a vortex cleaner plant |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL43368C (en) * | 1935-03-22 | |||
| US2765918A (en) * | 1953-05-11 | 1956-10-09 | Stamicarbon | Multiple hydrocyclone |
| GB772303A (en) * | 1954-09-20 | 1957-04-10 | Smidth & Co As F L | Improvements in the separation of slurries into fractions of differing particle content |
| US3335860A (en) * | 1964-07-27 | 1967-08-15 | Black Clawson Co | Centrifugal cleaner for paper making stock and the like |
-
1978
- 1978-07-06 JP JP8234778A patent/JPS5512831A/en active Pending
-
1979
- 1979-03-02 CA CA000322680A patent/CA1120895A/en not_active Expired
- 1979-07-03 DE DE19792926751 patent/DE2926751C2/en not_active Expired
- 1979-07-04 GB GB7923295A patent/GB2024664B/en not_active Expired
- 1979-07-06 MX MX17837979A patent/MX148959A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| DE2926751C2 (en) | 1985-12-05 |
| MX148959A (en) | 1983-07-28 |
| DE2926751A1 (en) | 1980-01-31 |
| GB2024664A (en) | 1980-01-16 |
| JPS5512831A (en) | 1980-01-29 |
| GB2024664B (en) | 1982-06-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |