CN2394946Y

CN2394946Y - Double screw pulp extruder

Info

Publication number: CN2394946Y
Application number: CN 99222398
Authority: CN
Inventors: 何炳义; 孙炳伟
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-22
Filing date: 1999-09-22
Publication date: 2000-09-06
Anticipated expiration: 2009-09-22

Abstract

The utility model relates to a double-screw pulp extruder which is an extruding device for removing black liquor from the pulp of paper making. The double-screw pulp extruder comprises screw shafts, a sieve plate, a sieve drum and a machine base, wherein, the left and the right screw shafts are supported on the machine base, and the wall of a hollow tube at the middle of each of the left and the right screw shafts is provided with a thin slit and a black liquor opening; the periphery of the circumference of the hollow tube is provided with the oppoiste-open type sieve drum for fixing the sieve plate, and screw vanes are distributed from a feed inlet in the axial direction of the screw shaft, wherein, the screw shaft is meshed and linked by a gear. The utility model is suitable for the extraction of the black liquor of paper pulp which uses wood, bamboo, bagasse, wheatgrass, reed, etc. as raw materials, and has the advantages of simple structure, continuous work, high extraction rate of black liquor, and high productive efficiency.

Description

Double screw pulp extruder

The utility model Double screw pulp extruder relates to two screw rods are extruded liquid from contain liquid substance forcing press, and specifically a kind of extrusion equipment of removing black liquor from paper-making pulping includes helical axis, sieve plate, screen cylinder and support.

In the waste water treatment of paper industry, black liquid extraction is a key link, and whether it directly affects can qualified discharge, and the extraction rate of black liquor of existing black liquor extraction equipment is lower, is difficult to satisfy instructions for use.

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of simple in structure, paper-making pulping equipment that extraction rate of black liquor is high is provided, and enterprise realizes few investment, reaches the hope that black liquid extraction requires.

A kind of Double screw pulp extruder of the utility model, include helical axis, sieve plate, screen cylinder and support, the technical scheme that realizes the utility model purpose is: left and right helical axis by bearings on support, the elongate slot and the black liquor mouth that are interlinked to the outside in the hollow tube wall in left and right helical axis middle part is provided with, left and right helical axis middle part hollow pipe periphery is equipped with the opposite opened screen cylinder in order to fixed screen deck, along left and right helical axis axially be distributed with the descending helical blade of pitch from the charging aperture beginning, left and right helical axis is driven by gears engaged.

The utility model has adopted extrusion principle, paper pulp is entered the charging aperture of the utility model Double screw pulp extruder by the grout outlet of the discharging opening of jetting storehouse or high density hydraulic pulper, by a left side, the rotation of right-hand screw axle, paper pulp enters the hollow cylindrical zone of being made up of axis body and sieve plate, because the axial separation of helical blade, form seal cavity one by one, because blade pitch from large to small, thereby slurry is subjected to continuously extruded in the process of forward impelling, black liquor on outer surface sieve plate eyelet and inner surface axle the elongate slot extrudate flow outside black liquor mouth discharge machine, the slurry of being extracted is finished paper pulp and is extracted black liquor technology outside discharge end discharge machine.Have simple in structure, work continuously and extraction rate of black liquor height, characteristics that production efficiency is high.

Below in conjunction with accompanying drawing the utility model and embodiment are described further.

Fig. 1 is example structure generalized section of the utility model;

Fig. 2 is an A-A generalized section among Fig. 1:

Fig. 3 be among Fig. 1 B to schematic diagram.

Embodiment as a kind of Double screw pulp extruder of the utility model, shown in Fig. 1～3, include helical axis, sieve plate, screen cylinder and support, a left side, right-hand screw axle 6 is by bearing 5,13 are supported on the support 14, on a left side, the elongate slot 10 and the black liquor mouth 12 that are interlinked to the outside in the hollow tube wall in right-hand screw axle 6 middle parts is provided with, a left side, right-hand screw axle 6 middle part hollow pipe periphery are equipped with the opposite opened screen cylinder 9 in order to fixed screen deck 8, along a left side, right-hand screw axle 6 axially be distributed with the descending helical blade of pitch 7 from 11 beginnings of charging aperture, a left side, right-hand screw axle 6 is driven by gear 4 engagements, can be to drive meshing gear 4 by buncher 1 by decelerator 2 and shaft coupling 3 to drive a left side, 6 rotations of right-hand screw axle.A left side, right-hand screw axle 6 rotating speeds are identical, switched in opposite, between left-hand screw axle blade 7 is positioned among right-hand screw axle two blades 7 distances simultaneously, carry out smoothly to keep running, spiral shaft vane 7 adopts not equidistant version, and form by axis body and blade welding fixed combination, blade 7 forms a continuous helical form curved surface along the axis body surface, blade 7 on two helical axis 6 is respectively dextrorotation and left-handed, helical axis 6 two ends are by rolling bearing 5,13 are supported on the support 14, helical axis 6 middle part hollow pipe periphery are opposite opened screen cylinder 9, with bolting on support 14, normally dewater with the sieve plate 8 that supports in the extrusion process, screen cylinder 9 and sieve plate 8 stitch bonds, for further improving de-watering of slurries efficient, be designed to hollow-core construction at blade 7 working portions on the helical axis 6, and the elongate slot 10 that is interlinked to the outside in being processed with, so that slurry dewaters internally.Be works fine environment around the realization equipment, preferably as Fig. 1, shown in 2, be provided with black liquid outlet 15 and discharging opening 16 in support 14 bottoms, on a left side, the elongate slot 10 that is provided with on the hollow tube wall in right-hand screw axle 6 middle parts communicates with charging aperture 11 and black liquor mouth 12 on the support 14, black liquor mouth 12 also communicates with the black liquid outlet 16 of support 14 bottoms, like this, the black liquor that squeezes out can flow out from sieve plate 8 eyelets and black liquor mouth 12, be pooled to support 14 bottoms and concentrate discharge from black liquid outlet 15 again, the slurry of being extracted is discharged to compile through support 14 bottom discharge mouths 16 from the discharge end of helical axis 6 and is discharged outside the machine.Can more unimpededly discharge from the discharge end of helical axis 6 for making the slurry of being extracted, as shown in Figure 1, preferably the discharge end at left and right helical axis 6 is set with discharging blade 17, and discharging blade 17 is accelerated to discharge from discharging opening 16 with the slurry that promotes to be extracted in helical axis 6 rotations.

The utility model Double screw pulp extruder is applicable to the black liquor extraction for raw material such as wood, bamboo, bagasse, wheat straw, reed, simple in structure, easy to operate, floor space is little, use is reliable, extraction rate of black liquor is high, is the ideal equipment of pulping and paper-making factory black liquid comprehensive utilization.

Claims

1, a kind of Double screw pulp extruder, include helical axis, sieve plate, screen cylinder and support, it is characterized in that a left side, right-hand screw axle (6) is by bearing (5,13) be supported on the support (14), on a left side, the elongate slot (10) and the black liquor mouth (12) that are interlinked to the outside in the hollow tube wall in right-hand screw axle (6) middle part is provided with, a left side, right-hand screw axle (6) middle part hollow pipe periphery is equipped with the opposite opened screen cylinder (9) in order to fixed screen deck (8), along a left side, right-hand screw axle (6) axially be distributed with the descending helical blade of pitch (7), a left side from charging aperture (11) beginning, right-hand screw axle (6) is driven by gear (4) engagement.

2, Double screw pulp extruder as claimed in claim 1, it is characterized in that the elongate slot (10) that is provided with on the hollow tube wall in left and right helical axis (6) middle part communicates with charging aperture (11) and black liquor mouth (12) on the support (14), black liquor mouth (12) the also black liquid outlet (16) bottom support (14) communicates.

3, Double screw pulp extruder as claimed in claim 1 or 2 is characterized in that being set with discharging blade (17) at the discharge end of left and right helical axis (6).

4, Double screw pulp extruder as claimed in claim 1 or 2 is characterized in that it drives meshing gear (4) by buncher (1) by decelerator (2) and shaft coupling (3) and drives left and right helical axis (6) rotation.

5, Double screw pulp extruder as claimed in claim 3 is characterized in that it drives meshing gear (4) by buncher (1) by decelerator (2) and shaft coupling (3) and drives left and right helical axis (6) rotation.