Jul 25, 2021 08:37
2 yrs ago
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English term
Reliable, Hardworking, On-time
Native in: Macedonian 
, Greek
Works in: English to Macedonian, English to Greek, Greek to Macedonian, and 3 more.
forward/reverse hydrocyclone
English to Greek
Tech/Engineering
Paper / Paper Manufacturing
Pulp machinery, hydrocyclones
This invention relates to systems and methods of using of hydrocyclone cleaners for cleaning and thickening a suspension of papermakers' fibers, otherwise commonly known as papermakers' stock. The methods and systems include a forward hydrocyclone cleaning subsystem followed by a reverse hydrocyclone cleaning subsystem. In each cleaner a feed flow is divided into at least one accepts and one rejects stream.
The terms "forward cleaning" and "reverse cleaning" have become well understood in the art of cleaning papermakers' stock, and relate to the manner in which a cyclone-type centrifugal cleaner is operated. Examples of cyclone-type cleaners connected and used as forward cleaners, in which an accept flow is removed at the base of the cone while a rejects flow is removed from the apex, are shown in Samson et al, U.S. Pat. No. 2,377,524 issued Jun. 5, 1945 and Grundelius et al, U.S. Pat. No. 3,486,619 issued Dec. 30, 1969. In a reverse cleaner system, a cyclone-type cleaner is operated in such a manner that the accept flow is removed from the apex of the cone, while the lighter rejects flow is taken out at the base, as shown in Braun, U.S. Pat. No. 3,912,579 issued Oct. 14, 1975, and in Braun et al, U.S. Pat. No. 3,557,956 issued Jan. 26, 1971.
Forward hydrocyclone cleaning systems are commonly employed to remove heavy particles and contaminants, while hydrocyclone reverse cleaning systems are utilized to remove lightweight contaminants. It is generally known that lower feed consistency leads to better contaminant removal efficiency, in both forward and reverse cleaners. In many installations, the stock preparation equipment includes both forward and reverse cyclone-type cleaners or cleaning systems at discrete locations within the system to produce the particular result for which the cleaning system is efficient. However, there remains a need for combining the forward and reverse cleaners into a single integrated cleaning system, in which the inherent operation characteristics of each system is used to enhance the efficiency of the other.
The terms "forward cleaning" and "reverse cleaning" have become well understood in the art of cleaning papermakers' stock, and relate to the manner in which a cyclone-type centrifugal cleaner is operated. Examples of cyclone-type cleaners connected and used as forward cleaners, in which an accept flow is removed at the base of the cone while a rejects flow is removed from the apex, are shown in Samson et al, U.S. Pat. No. 2,377,524 issued Jun. 5, 1945 and Grundelius et al, U.S. Pat. No. 3,486,619 issued Dec. 30, 1969. In a reverse cleaner system, a cyclone-type cleaner is operated in such a manner that the accept flow is removed from the apex of the cone, while the lighter rejects flow is taken out at the base, as shown in Braun, U.S. Pat. No. 3,912,579 issued Oct. 14, 1975, and in Braun et al, U.S. Pat. No. 3,557,956 issued Jan. 26, 1971.
Forward hydrocyclone cleaning systems are commonly employed to remove heavy particles and contaminants, while hydrocyclone reverse cleaning systems are utilized to remove lightweight contaminants. It is generally known that lower feed consistency leads to better contaminant removal efficiency, in both forward and reverse cleaners. In many installations, the stock preparation equipment includes both forward and reverse cyclone-type cleaners or cleaning systems at discrete locations within the system to produce the particular result for which the cleaning system is efficient. However, there remains a need for combining the forward and reverse cleaners into a single integrated cleaning system, in which the inherent operation characteristics of each system is used to enhance the efficiency of the other.