PROBLEM Provided is a transportation method for a water-absorbing resin powder substance, which is capable of suppressing property decrease of the water-absorbing resin powder substance while suppressing blocking phenomenon and is suitable for long distance transportation. SOLUTION The present inven
PROBLEM Provided is a transportation method for a water-absorbing resin powder substance, which is capable of suppressing property decrease of the water-absorbing resin powder substance while suppressing blocking phenomenon and is suitable for long distance transportation. SOLUTION The present invention is a transportation method for a water-absorbing resin powder substance during a production step by pneumatic transportation via a transportation pipeline. In this transportation method, two or more pneumatic transportation apparatuses (A, B, C) are provided in one transportation section, and these pneumatic transportation apparatuses (A, B, C) are connected by the transportation pipelines (P1, P2, P3) in series.
대표청구항▼
1. A transportation method for conveying a water-absorbing resin powder substance during production thereof, the method comprising a step of pneumatically transporting the water-absorbing resin powder substance via transportation pipelines, wherein two or more plug-forming pneumatic transportation a
1. A transportation method for conveying a water-absorbing resin powder substance during production thereof, the method comprising a step of pneumatically transporting the water-absorbing resin powder substance via transportation pipelines, wherein two or more plug-forming pneumatic transportation apparatuses connected by the transportation pipelines in series are used in one transportation section for plug-forming pneumatic transportation. 2. The transportation method according to claim 1, wherein a total length Lt of the transportation pipelines included in the one transportation section is equal to or longer than 50 m. 3. The transportation method according to claim 1, wherein a length Lp of each transportation pipeline included in the one transportation section is equal to or shorter than 40 m. 4. The transportation method according to claim 1, wherein a linear velocity at a terminal of the transportation pipeline of the water-absorbing resin powder substance is equal to or lower than 15 m/s. 5. The transportation method according to claim 1, wherein the two or more plug-forming pneumatic transportation apparatuses each have a pressurized tank and a receiving hopper. 6. The transportation method according to claim 5, wherein a valve is provided between the pressurized tank and the receiving hopper, and operation of the valve and start-up of the two or more plug-forming pneumatic transportation apparatuses are automatically controlled, based on the powder level in the receiving hopper. 7. The transportation method according to claim 5, wherein a valve is provided between the pressurized tank and the receiving hopper, and operation of the valve and start-up of the two or more plug-forming pneumatic transportation apparatuses are automatically controlled, based on the pressure in the pressurized tank. 8. The transportation method according to claim 1, wherein a total length Lt of the transportation pipelines included in the one transportation section is equal to or longer than 100 m. 9. The transportation method according to claim 1, wherein the two or more plug-forming pneumatic transportation apparatuses are each a pneumatic transportation apparatus in high concentration. 10. The transportation method according to claim 1, comprising a step for storing the water-absorbing resin powder substance pneumatically transported. 11. The transportation method according to claim 1, wherein a transportation amount of the water-absorbing resin powder substance is equal to or higher than 1000 kg/hr. 12. The transportation method according to claim 1, wherein the water-absorbing resin powder substance has been surface cross-linked with a polyhydric alcohol. 13. The transportation method according to claim 1, wherein the water-absorbing resin powder substance comprises a polyvalent metal salt. 14. The transportation method according to claim 1, wherein the water-absorbing resin powder substance comprises an inorganic particle. 15. The transportation method according to claim 1, wherein the saline flow conductivities of a 0.69% by mass normal saline solution of the water-absorbing resin powder substance before and after transportation are each equal to or larger than 10 (×10−7·cm3·s≦g−1). 16. The transportation method according to claim 1, wherein the water-absorbing resin powder substance is a pulverized irregularly shaped polyacrylic acid (salt)-based water-absorbing resin obtained by continuous belt polymerization or continuous kneader polymerization. 17. The transportation method according to claim 1, wherein the water-absorbing resin powder substance is a polyacrylic acid (salt)-based water-absorbing resin obtained by a production step comprising a fine powder recycling step. 18. The transportation method according to claim 1, wherein the water-absorbing resin powder substance is a polyacrylic acid (salt)-based water-absorbing resin produced by a process including surface cross-linking at 150 to 250° C. 19. The transportation method according to claim 2, wherein a length Lp of each transportation pipeline included in the one transportation section is equal to or shorter than 40 m. 20. The transportation method according to claim 2, wherein a linear velocity at a terminal of the transportation pipeline of the water-absorbing resin powder substance is equal to or lower than 15 m/s.
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