Solenis LLC , Wilmington, Del., USA, recently purchased PulpEye’s  (Örnsköldsvik, Sweden) 100th Dynamic Drainage Analyzer (DDA). The DDA is a dynamic drainage tester that gives drainage values comparable to drainage in a wire section. The tester is used by paper and board producers as well as chemical and filler suppliers around the world.

With the aid of the DDA, drainage conditions for different pulp mixtures, refining levels, chemicals, and filler additives, etc. can be studied. Optimal drainage and retention are important parameters for paper production. Both productivity and quality are improved with correct amounts of chemicals at the right place in stock preparation. Studies of drainage for different stock mixtures with different additives and their respective effects can quickly be carried out without disturbing production. 

"We have customers all over the world using our DDA in production as well as in development projects," said Öjvind Sundvall, managing director, PulpEye. "We are pleased to have delivered more than 100 DDA testers with more orders pending. Last year we launched the DDA 5, the latest version of our dynamic drainage analyzer with much success due to its number of new, even more efficient, drainage tests."

John Bujold, platform launch manager, N.A. Pulp and Paper, Solenis LLC, said that "Solenis uses the tester for wet end chemistry studies at their customers  to optimize retention, a characteristic that affects product quality as well as economy for paper and board producers." 

DDA 5 has a compact design and is equipped with a variety of new features including retention via a turbidity sensor. Drainage rate can be determined for selected time spans and chemical dosage is automated. Equipment cleaning is carried out automatically after each analysis, allowing more analyses to be performed per hour compared with previous versions. All input and presentation of the results are done through a new, user-friendly interface.

 

 

John F Bujold, platform launch manager N.A., Pulp and Paper (left), and Mark Laurint, applications engineer retention/drainage/clarification, both with Solenis, with the certificate showing that Solenis bought DDA tester No. 100.

For more information, contact Öjvind Sundvall, MD PulpEye, +46 70 618 63 02.