Specifications and Product Details:

HS Series Arc Screen for pulp and paper machine

I. Overview

The pulping process cannot get away the pulp concentration while the fiber recovery of waste water also is the concentration process of pulp. The available pulp concentration equipment such as the round mesh thickener, side pressure thickener and various fiber recovery machines, has complex structure, occupies large floor area and requires external power driving. While this machine is designed by improving the introduced like products and suitable for various pulp concentration washing and paper waste fiber recovery. As the newest generation product, it has the advantages of simple structure, small floor area, high processing capacity and little power consumption.

II. Working Principle

The pulp delivered under a certain pressure first passes the pulp inlet on the sieve bend top to flow into the pulp distributing plate, where the pulp is accelerated and then flows to the arc filtration zone in tangential direction. In this zone, the pulp is subjected to the action of centrifugal force and repeated dewatering and then enters the outlet under the gravity action to discharge. The filtrated waste water is discharged through the waste water outlet.

III. Main Specifications and Parameters

Specification/Model Parameter		HS-1	HS-2	HS-3	HS-4
Dewatering area (m²)		1	2	3	4
Pulp concentration	Production capacity T/D	20-40	40-80	60-120	80-160
	Concentration of Feeding Pulp %	0.5-3
	Concentration of Outgoing Pulp %	3-6
Waste water fiber recovery	Processing capacity (m³/h)	100-200	200-400	300-600	400-800
Waste water fiber recovery	Concentration of Outgoing Pulp %	1.5-3
Pulp (water) inlet pressure (MPa)		≥0.25
Water spraying pressure (MPa)		≥0.15
Pulp inlet flange		DN150×1	DN150×2	DN150×3	DN150×4
Pulp outlet flange		DN200	DN200×2	DN200×3	DN200×4
External dimension (L×W×H) mm		906×1496×2356	1664×1496×2356	2416×1496×2356	3174×1496×2356

IV. Structure description

This machine consists of machine body provided with pulp inlet and outlet, arc filter plate mounted on the body, pulp distributing plate to regulate the pulp spray angle and speed and the movable sector nozzle to clean the filter plate (refer to equipment external installation dimension Figure 1).

V. Installation

The installation foundation of sieve bend should be designed and constructed according to the total weight, taking the operating space for the operation and maintenance staff into account. Figure 2 shows the installation foundation dimensions for reference. With the side plate vertical plane of the sieve bend as reference, after installation, the longitudinal levelness deviation of sieve should be ≤0.1mm/1000mm and the lateral levelness deviation should be ≤0.2mm/1000mm.

VI. Operation

(I) Test running:

Switch on the spray water pipe swing motor, connect the spray water to check whether the sector nozzle can cover the entire arc filter plate back and adjust it if not.

(II) Operation under load

1. Switch on the spray water pipe swing motor and open the washing water valve.

2. Start to feed pulp (water).

3. Adjust the pulp distributing plate opening and spray water pressure according to the pulp outlet concentration requirement or replace the water spraying nozzle of different opening.

(III) Stop

1. Stop feeding pulp (water).

2. Close the washing water valve about 1 minute later and stop the spray water pipe swing motor.

VII. Repair

Depending on the nature of pulp and waste water, this machine may adopt H0.1 - 0.25mm arc filter plate, the surface of which is applied with 0.25mm wearing coat to ensure more than 5 years' normal service life. Therefore, this machine requires little repair.

VIII. With drawing attached.

Figure 1: Equipment external installation dimensions

Figure 2: Installation foundation dimensions