CN2382744Y - Parallel spin double screw pulpe extruder - Google Patents

Abstract

The utility model relates to a homodromous rotation double screw pulp extruder which can complete pulp concentration, pulp washing or black liquor extraction in papermaking. The pulp extruder comprises a power transmission mechanism, a work spindle, a slurry propulsion conveyer on the work spindle, a conjugation rotor, a compression dewatering screw which has a certain compression ratio, a material inlet, a material outlet, a discharge port, etc. The technical scheme of the pulp extruder is characterized in that the conjugation rotator on the work spindle is in a tangential fit with the inner wall of a casing, and a sealed spiral flow channel which enables pulp materials to be axially propelled is formed in the work section. The pulp extruder has the advantages of high work efficiency, good reliability and water and electricity saving, and is used for processing wheat straw pulp.

Description

The co-rotating twin screw press master

The utility model relates to the twin-screw press master paper making equipment that in the papermaking operation, to realize the concentrating of slurry, washing and black liquid extraction.

In the paper making equipment, also can be described as thickener or black liquid extraction machine etc. according to the different this equipment of purposes.It forms structure: the working-spindle that is driven by motor, reductor is provided with two intermeshing twin-screws that compress dehydrations, the twin-screw front portion also is provided with slurry and advances auger and have the conjugation rotor that contains the arc helical blade of engagement mutually fully, conjugation rotor and twin-screw place are provided with and its corresponding screen cloth of circular arc profile radially, and charging aperture one end of working-spindle connects with the output axle head of reductor.The major defect of the following several respects of this original same category of device ubiquity: this equipment is because the compression ratio of screw rod is bigger, must adopt long working-spindle to realize its work, equipment volume is strengthened, and power consumption increases, when handling wood pulp or reed pulp slurry, it is dull slurry often to occur, skid or dewater difficult phenomenon, this phenomenon is even more serious so that can't carry out the processing of Straw Pulp when especially handling Straw Pulp, this is because the Straw Pulp content of ashes is big, the viscosity height, characteristics such as drainability difference cause, and therefore cause Straw Pulp to concentrate, the blank of treatment process such as washing and black liquid extraction; Its concentrated slurry discharging opening makes working-spindle bear excessive torque away from the installation site of motor and reductor, and this just makes equipment must mate high-power motor, the lost of life of working-spindle, fault rate height on the one hand.In addition, legacy equipment transmission mechanism and working-spindle have adopted hard draw bail mode, and this structure is difficult to adapt to the condition of work more than 80 ℃ in the black liquid extraction operation, the scope of application of equipment is restricted.Therefore, existing similar paper making equipment is owing to exist above weak point, adapts to the desirable duty that various slurries are handled and realized low power, low power consuming and be difficult to reach.

Goal of the invention of the present utility model is to provide a kind of co-rotating twin screw press master that makes it have stronger compression, dehydration task performance, reduction energy resource consumption.

Goal of the invention of the present utility model also is to provide a kind of its structure to be fit to various fibre stufves, especially be fit to handle the most unmanageable Straw Pulp or similar slurry, concentrate, during the work of washing and black liquid extraction, stable working, co-rotating twin screw press master reliably.

Realize the co-rotating twin screw press master of above-mentioned first goal of the invention, its technology is formed and is comprised: the power drive mechanism that motor and speed reducer etc. are formed, the two homodromal working-spindles that this mechanism drove, be provided with material by slurry feeding mouth to discharging opening on the working-spindle and advance auger with the operation of necessarily being meshing with each other, the compression dehydrating threaded rod of conjugation rotor and reducing varying pitch, the major technique characteristics of the technical program are the sealing casing inner wall tangent cooperations corresponding with its work section of the blade outer rim of conjugation rotor, form the sealing screw runner that slurry advances vertically at this work section.

On the technique scheme basis, second goal of the invention of the present utility model is to be realized by following technical characterstic, and promptly its compression dehydrating threaded rod employing convergent spiral shell footpath, pitch, compression ratio are 5～10: 1 compression dehydrating threaded rod.

Co-rotating twin screw press master of the present utility model is in design, low at original equipment compressed capability when handling wood pulp or reed pulp, the disadvantage that dehydration is difficult, contain the conjugation rotor of engagement arc helical blade mutually fully except that having adopted in the present technique, also the sealing casing inner wall of its helical blade outer rim and its work section is taked tangent fit structure, make this work section be completed into the axially sealing operation runner of the spiral charging of operation of slurry, thereby increased the axial motive force of slurry feed greatly, improved the dewatering efficiency of this equipment compression screw rod to wooden slurry or reed pulp, greatly reduce equipment operation power, make concentrating of slurry, washing and black liquid extraction operation become more light.In the present technique design, being designed to of canned rotor conjugation runner handled the Straw Pulp of drainability extreme difference and created condition, through repeatedly experiment repeatedly, when its compression ratio that rotates the compression screw rod in the same way is 5～10: in the time of 1, can be completely achieved washing to Straw Pulp, concentrate or the operation of black liquid extraction, when the compression ratio that compresses screw rod is 7～9: in the time of 1, better processing effect to Straw Pulp, thereby changed the present situation that existing same category of device can't be handled Straw Pulp, and shortened the effective length of working-spindle, dwindled equipment volume, the work energy consumption of making further reduces, high efficiency, good reliability.This co-rotating twin screw press master is owing to adopted technique scheme, its washing, ability to work concentrated or black liquid extraction obviously improve, the utility model type is carrying out the black liquid extraction application experiment at Straw Pulp, the entrance concentration of Straw Pulp is 6%～12%, exit concentration can reach 20%～35%, wood pulp: entrance concentration is 3%～8%, and exit concentration is 20～40%, reaches oven dry stock; And can save a large amount of water, electricity, and to compare with traditional vacuum pulp washing machine, the power consumption of Straw Pulp is reduced to 9KWH by 26KWH, and the power consumption of wood pulp is reduced to 8KWH by 22KWH, and water consumption is by original 80m ³/ t reduces to 25m ³/ t.Thereby thoroughly changed the present situation of existing paper making equipment technology.

Describe technology contents of the present utility model below in conjunction with accompanying drawing in detail to embodiment.

Fig. 1 looks cross-sectional view for the master of this co-rotating twin screw press master

Fig. 2 overlooks direction sectional structure schematic diagram for this co-rotating twin screw press master.

As shown in the figure, co-rotating twin screw press master of the present utility model comprises slurry propelling auger 2, the conjugation rotor 4 on working-spindle power drive mechanism, the working-spindle 6 and has the compression dehydrating threaded rod 5 of reducing varying pitch, and charging aperture 1, floss hole and discharging opening 8 are formed, its power drive mechanism includes formations such as motor, variable-frequency governor and reductor 10, and the axle head that two homodromal output shafts of reductor 10 and working-spindle 6 are positioned at discharging opening 8 places links.At the diaxon place that links, gear coupling 9 connects in can adopting, wherein internal tooth casing 91 is provided with for internal gear 92 axially movable displacement spaces, like this when this equipment work more than 80 ℃ during the black liquid extraction working environment, its working-spindle 6 flexible can by should in gear coupling 9 automatically realize temperature change compensate function.In the present technique, its conjugation rotor 3 is two to have the rotor that mutually contains the arc helical blade of engagement fully, and its helical blade outer rim is tangent the cooperation with its casing inner wall 4, and the spiral that makes it to constitute the slurry feed of sealing moves runner.Twin-screw 5 on two working-spindles 6 of the present utility model is homodromal intermeshing change spiral shell footpath, varying pitch has the compression dehydrating threaded rod of certain compression ratio, its periphery is provided with multistage screen cloth 7, connect by its rib 71, this twin-screw 5 has looser pan feeding spiral input port at conjugation rotor 3 outputs, adopted tapering type structure to its discharging opening 8, make its input, delivery outlet has certain compression ratio, in this real an ancient swallowtailed flag example, for this equipment can be concentrated Straw Pulp, operations such as washing or black liquid extraction, the compression ratio range of its twin-screw is 5～10: 1, and its optimum range value is 7～9: 1.

Claims (5)

1, a kind of co-rotating twin screw press master, it includes the power drive mechanism that motor and speed reducer (10) etc. is formed, the two homodromal working-spindles (6) that this mechanism drove, working-spindle (6) is gone up by slurry feeding mouth (1) to discharging opening (8) and is provided with the compression dehydrating threaded rod (5) that the material with the operation of necessarily being meshing with each other advances auger (2), conjugation rotor (3) and reducing varying pitch, it is characterized in that; The tangent cooperation of sealing casing inner wall (4) that the blade outer rim of conjugation rotor (3) is corresponding with its work section forms the sealing screw runner that slurry advances vertically at this work section.

2, co-rotating twin screw press master according to claim 1 is characterized in that the compression ratio of the compression dehydrating threaded rod (5) of its convergent spiral shell footpath, pitch is 5～10: 1.

3, co-rotating twin screw press master according to claim 2 is characterized in that the compression ratio of the compression dehydrating threaded rod (5) of its convergent spiral shell footpath, pitch is 7～9: 1.

4, co-rotating twin screw press master according to claim 1 and 2 is characterized in that reductor (10) output shaft is connected in the axle head at working-spindle (6) discharging opening place.

5, co-rotating twin screw press master according to claim 4 is characterized in that being provided with interior gear coupling (9) between the output shaft of reductor (10) and the working-spindle (6), and its internal tooth casing (91) is provided with for the axially movable displacement space of internal gear (92).