초록 ▼

The specification discloses an improved bleaching sequence which provides significant reduction in filtrate volumes and amounts of absorbable organic halide (AOX), color, and chemical oxygen demand (COD) in the effluent. These reductions are achieved without adversely affecting the brightness and vi

The specification discloses an improved bleaching sequence which provides significant reduction in filtrate volumes and amounts of absorbable organic halide (AOX), color, and chemical oxygen demand (COD) in the effluent. These reductions are achieved without adversely affecting the brightness and viscosity properties of the bleached pulp and without a high capital cost and operating cost penalty or impact on existing mill processes. The bleaching sequence according to the invention for reducing filtrate volumes is an EOD1EOPD2or EOPD1EOPD2bleaching sequence wherein substantially all of the filtrates from the later bleaching stages are recycled to earlier bleaching stages and eventually treated in the initial EOor EOPstage prior to discharge from the plant. An advantage of the invention is that pulp having a Kappa number of greater than about 25 for softwood and greater than about 15 for hardwood may be fed to the bleaching process while still providing a bleached pulp having sufficient brightness, viscosity characteristics and good pulp yield.

대표청구항 ▼

The specification discloses an improved bleaching sequence which provides significant reduction in filtrate volumes and amounts of absorbable organic halide (AOX), color, and chemical oxygen demand (COD) in the effluent. These reductions are achieved without adversely affecting the brightness and vi

The specification discloses an improved bleaching sequence which provides significant reduction in filtrate volumes and amounts of absorbable organic halide (AOX), color, and chemical oxygen demand (COD) in the effluent. These reductions are achieved without adversely affecting the brightness and viscosity properties of the bleached pulp and without a high capital cost and operating cost penalty or impact on existing mill processes. The bleaching sequence according to the invention for reducing filtrate volumes is an EOD1EOPD2or EOPD1EOPD2bleaching sequence wherein substantially all of the filtrates from the later bleaching stages are recycled to earlier bleaching stages and eventually treated in the initial EOor EOPstage prior to discharge from the plant. An advantage of the invention is that pulp having a Kappa number of greater than about 25 for softwood and greater than about 15 for hardwood may be fed to the bleaching process while still providing a bleached pulp having sufficient brightness, viscosity characteristics and good pulp yield. on and a guiding portion, which is disposed to surround said concave portion, and which has a proximate edge proximate to said concave portion, a distal edge distal from said concave portion, and an inclined surface that inclines downwardly from said proximate edge to said distal edge. 3. The shoe as claimed in claim 2, wherein said fastener engaging section of said first fastener includes a resilient latch member having a pivot end mounted pivotally on said mounting section, and a lock end opposite to said pivot end and formed with a convex protrusion that projects toward said mounting section, said latch member being pivotable about said pivot end so as to enable said convex protrusion on said lock end to move along said inclined surface and into said concave portion to inter engage said first and second fasteners when said second fastener is disposed on said mounting section. 4. The shoe as claimed in claim 1, wherein said mounting section of said first fastener includes a barrier which extends upwardly from a distal edge of said mounting section and which is formed with a limiting flange at a top edge of said barrier, said barrier being disposed to abut against said shoe lace stringing section of said second fastener to restrict movement of said second fastener relative to said first fastener. 5. The shoe as claimed in claim 1, wherein said mounting section and said fastener engaging section of said first fastener cooperate to impart said first fastener with a tubular configuration, said first fastener having an open insert end and being formed with a radial fastener hole, said fastener engaging section of said second fastener being formed with a resilient anchor member that is inserted into said open insert end and that is formed with a hook end for engaging removably said fastener hole. f the beach cleaner. 7. The beach cleaner according to claim 1, wherein said downwardly projecting members extending downwardly from said longitudinal members are arranged in a zigzag fashion and include reinforcing members to form triangularly shaped downwardly projecting members. 8. A beach cleaner for recovering waste scattered on sandy soil, said beach cleaner comprising: a travel body for carrying waste recovered during travel, said travel body having a plurality of longitudinal members and having in a front portion thereof a portion to be towed by traction vehicle, said longitudinal members being arranged in a hurdle shape spacedly extending in a traveling direction of the beach cleaner; and a scraper for scraping up waste together with sand during travel, said scraper extending in a transverse direction of said travel body for delivering waste upwardly and away from the sandy soil for removal of the waste; and a plurality of downwardly projecting members extending downwardly from said longitudinal members for engaging the sandy soil for dislodging waste therefrom. 9. The beach cleaner according to claim 8, and further including a net for separating waste from a waste-sand mixture scraped up by said scraper and for storing the waste is stretched on an upper surface of said travel body. 10. The beach cleaner according to claim 8, wherein the front portion of said travel body is provided with a slant portion which slants upward at said front portion of said traveling boby. 11. The beach cleaner according to claim 9, wherein the front portion of said travel body is provided with a slant portion which slants upward at said front portion of said traveling body. 12. The beach cleaner according to claim 9, wherein a rear portion of said travel body is provided with a slant portion which slants upward at said rear portion of said traveling body. 13. The beach cleaner according to claim 8, wherein said traveling body includes an outer frame including said front portion, a left side member, a right side member and a rear member connected together for supporting said plurality of longitudinal members extending in the traveling direction of the beach cleaner. 14. The beach cleaner according to claim 8, wherein said downwardly projecting members extending downwardly from said longitudinal members are arranged in a zigzag fashion and include reinforcing members to form triangularly shaped downwardly projecting members. efines an exhaust chamber, said exhaust chamber being in fluid communication with said exhaust passageway when said housing is inserted into said handle; and an endcap removably attached to said handle by a hook that engages a ledge located on an exterior surface of said handle substrate and having an outlet with at least one exhaust port in fluid communication with said exhaust chamber; and a seal disposed at an interface between said handle and said endcap. 5. The pneumatic tool according to claim 4 wherein said endcap is further attached to said handle by an inlet bushing that is removably attached to said housing through said endcap. 6. A pneumatic tool comprising: a housing having an exhaust passageway; a handle having a handle substrate with an inlet that receives said housing and an interior surface that defines an exhaust chamber, said exhaust chamber being in fluid communication with said exhaust passageway when said housing is inserted into said handle; and an endcap removably attached to said handle and having an outlet with at least one exhaust port in fluid communication with said exhaust chamber; and a seal disposed at an interface between said handle and said endcap and further comprising a grip surface disposed externally on said handle substrate, said grip surface having a lip provided between and in contact with said endcap and said handle when said endcap is attached to said housing. 7. The pneumatic tool according to claim 6 wherein said seal is formed integrally with said grip surface. 8. The pneumatic tool according to claim 7 wherein said seal and said grip surface are formed from an elastomeric material over-molded onto said handle substrate.