Small to Medium Scale CTMP/Semi-chemical pulping turnkey solutions

Pulping Equipment

Twin Screw Pressurized Impregnator (TSPI)/Twin Screw Extruder

-Also known as High-Pressure Fiberizer for pulp & paper, and Plastic Extruder for Plastic Blending

The TSPI (High-Pressure Fiberizer or Extruder) is made with two parallel, intermeshing and co-rotating screws. Specially designed screw elements to apply dynamic compression upon the fiber during transportation, to separate fibers with kneading action under high pressure and concentration, and at the same time, the hot water dissolves or alkali extracts are discharged by the filter screen on the barrel.

Working principle

“Reverse compression”——Materials with different bulk weights can achieve efficient compression.
“Intermeshing”——Self-cleaning, no slippage.
“modular screw” ——Easy to adjust compression effect of different materials.
“Pulsing”kneading——Gradually compression of materials to reduce fiber damage.
“Metering”chemical injection——chemical agents are accurately measured.
“kneading mixing”——Efficient mixing to ensure uniform absorption of chemical agents.

Function & Application

Compressed, kneaded and Extruded wood chips

Compression-expansion-pressurized impregnation, enhanced chemicals immersion, ensures high efficiency impregnation.

Microscopic analysis of fiber after TSPI Extruder processing

Compression and kneading can reduce the rigidity and improve flexibility of fibers.
Compression and kneading process can result in fiber distortion, surface rupture, wrinkling and P-layer stripping.
Increase the surface roughness of wood chips, clean up the sediment in the grain holes, and effectively reduce the resistance of liquid penetration.
Lower the refining power consumption.

TSPI (High-Pressure Fiberizer or Twin Screw Extruder) specifications

Application of TSPI/Twin Screw Extruder

PULP & PAPER

CTMP/APMP or Semi-chemical Pulping

PLASTIC

Plastic blending and working as core Extruder equipment production

For CTMP/APMP or Semi-Chemical pulping Process using Double TSPI (High-Pressure Fiberizer or Extruder)

TSPI For CTMP/APMP or Semi-Chemical pulping Process is a proven technology, it is developed for chemi-mechanical pulping with the raw materials of wood chips, bamboo chips and agricultural residues, especially for air-dried raw materials：

Effectively increase the moisture content of the material, reduce the softening temperature of lignin, lower the power consumption of fiber refining, increase the proportion of long fibers and reduce the fine fiber components.
Effectively remove hot water or alkali extract from the material to lower the chemical consumption.
According to different uses of pulp, the physical strength index such as bulk or burst can be greatly improved, and it can be used in making white cardboard, boxboard paper, tissue paper etc.

Wide acceptability of Raw materials

Successful pulping projects

Wood chips pulping (Bleached or Unbleached) CTMP/APMP

Index	Unit	Result
Whiteness	%ISO	81
Canadian Freeness CSF	mL,CSF	320
Breaking Length	m	3950
Bulk	cm³/g	2.6
Tensile	N.m/g	38
Burst	kPa.㎡/g	2.83

Specs for Beating degree 45°SR and paper basis weight 60g/㎡

Wood chips pulping (Bleached or Unbleached) CTMP/APMP

Index	Unit	Result
Beating Degree	°SR	14
Whiteness	%ISO	18
Breaking Length	m	3020
Original Bulk	cm³/g	3
Tensile	N.m/g	29
Pulp Residual alkali	g/l	0.016
Dust each/3.8g odt	0.05-0.3mm2 Black	70
	0.1-0.3mm2 Black	9
	0.3-1.5mm2 Black	1
	＞1.5mm2 Black	0