High-consistency paper pulp bleaching tower bottom discharger

Abstract

The invention discloses a high-consistency paper pulp bleaching tower bottom discharger comprising a water inlet pipe, a rotating water inlet joint, a water spray tube, a rake arm, a support, a planetary gear mechanism, a variable frequency motor, a paper pulp discharge pipe, a rotating joint and a rotating paper pulp outlet pipe. The variable frequency motor is connected with the planetary gear of the planetary gear mechanism; the gear ring of the planetary gear mechanism is fixed on the support; the sun gear of the planetary gear mechanism is connected with the rotating paper pulp outlet pipe; the upper end of the rotating paper pulp outlet pipe is connected with the paper pulp outlet of the rake arm, and the lower end is connected with the paper pulp discharge pipe through the rotating joint; and the water spray pipe is connected with the rake arm. Adopting the planetary gear transmission mechanism, the high-consistency paper pulp bleaching tower bottom discharger has the advantages of uniform load distribution, high transmission ratio, compact structure, high efficiency, large carrying capacity and steady transmission, etc. A rotating paper pulp outlet cylinder has multiple functions of rotating a main shaft, conveying the moment of force and conveying the paper pulp. Discharging the paper pulp after diluting, the high-consistency paper pulp bleaching tower bottom discharger consumes less power and occupies less space because no diluting system needs to be arranged outside a high-consistency paper pulp bleaching tower.

Description

technical field [0001] The invention relates to a pulp unloader in pulping and papermaking, in particular to a bottom unloader of a high-consistency pulp bleaching tower in a downflow bleaching tower. Background technique [0002] At present, the unloading device at the bottom of the high-consistency pulp bleaching tower in my country mainly includes a screw unloading device: there are three horizontally parallel variable-diameter mandrel screw feeders at the bottom of the bleaching tower, which can evenly send the pulp to the pulp outlet. , The scraper unloader rotating at the bottom of the tower makes the reacted pulp be scraped from the inner periphery of the tower to the center and discharged. The high consistency pulp is sent out of the bleaching tower without dilution. The unloader usually consists of 2-3 rake arms and several spirals. The rake arm actually presses under the pulp throughout the bleaching tower. The speed is very slow, usually a few revolutions per mi...

AI Technical Summary

Problems solved by technology

Therefore, domestic high-concentration bleaching tower bottom unloaders generally have the following disadvantages: (1) A dilution tank must be added, and a uniform stirring system must be provided in the tank

(2) There are a few more screw propellers and dilution tanks, which increases the height of the tower a lot (3) Since the unloader unloads high-consistency pulp, the load is relatively large, which will cause relatively large motor power

(4) Since there are several spirals, unloaders and dilution tanks with thicker roots, the overall waste of materials

Foreign unloaders have the advantage of being able to discharge materials evenly, but they also have the following disadvantages: (1) A dilution system must be added

(2) The motor power is relatively large

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