DEFIBRATOR WITH SEPARATED BLOW VALVE

• US 20190309471A1
• Filed: 06/01/2017
• Published: 10/10/2019
• Est. Priority Date: 06/13/2016
• Status: Abandoned Application

• Current Assignee: Valmet AB
• Original Assignee: Valmet AB
• Inventors: WALLIN, Per, AHLGREN, Orjan, NYBERG, Per, ERIKSSON, Per, GRANNAS, Mattias
• Application Number:
  US16/308,977
• Publication Number:
  US 20190309471A1
• Time in Patent Office: Days
• CPC Class Codes: D21B 1/14 Disintegrating in mills
• CPC Class Codes: D21B 1/30 Defibrating by other means
• CPC Class Codes: D21C 3/22 Other features of pulping processes
• CPC Class Codes: D21C 3/222 Use of compounds accelerating the pulping processes
• CPC Class Codes: D21D 1/30 Disc mills
• CPC Class Codes: D21D 1/303 Double disc mills

Abstract

The invention relates to a pulp refining system for mechanically refining of lignocellulosic material, comprising a defibrator, a defibrator housing, in which the defibratoris arranged, a blow valve having an inlet and an outlet and being adapted for regulating a flow of pulp therethrough, and a discharge pipe having an inlet, which is connected to the outlet (12) of the blow valve, wherein a mounting pipe having an inlet, which is connected to the defibrator housing, is arranged between the defibrator housing and the blow valve, said mounting pipe having a length of at least about 0.2 meter.

Claims

1. A pulp refining system for mechanically refining of lignocellulosic material, comprising:

a defibrator,

a defibrator housing, in which the defibrator is arranged,

a blow valve having an inlet and an outlet and being adapted for regulating a flow of pulp therethrough, and

a discharge pipe having an inlet which is connected to the outlet of the blow valve, characterized in that a mounting pipe having an inlet, which is connected to the defibrator housing, is arranged between the defibrator housing and the blow valve, said mounting pipe having a length (L) of at least about 0.2 meter.

2. The pulp refining system according to claim 1, characterized in that the length (L) of the mounting pipe is at least about 0.5 meter.

3. The pulp refining system according to claim 1, characterized in that the length (L) of the mounting pipe is such that 0.2 m≤

L≤

1.5 m.

4. The pulp refining system according to claim 1, characterized in that the mounting pipe is provided as a separate component.

5. The pulp refining system according to claim 1, characterized in that the mounting pipe is configured as an inlet portion of the blow valve.

6. The pulp refining system according to claim 1, characterized in that the mounting pipe is configured as a combination of a separate component and an inlet portion of the blow valve.

7. The pulp refining system according to claim 1, characterized in that the length of the mounting pipe is measured from the defibrator housing to a closest side of a valve member arranged in the blow valve.

8. The pulp refining system according to claim 1, characterized in that the mounting pipe has a cross-section, which is essentially equal, both in shape and size, to the cross-section of an interior flow channel in the blow valve.