Horizontal paddle dryer

Abstract

The object of the invention is a horizontal paddle dryer that is used for normal or vacuum drying of soaked substances that are in the form of dry powder mixtures or granulates in a manufacturing process and are soaked and mixed (normally with solvents) due to technological needs. Once drying is completed, the interior of the dryer needs to be washed due to various types of substances that differ from each other in content and properties. The construction of the horizontal paddle dryer of the invention allows simple and effective washing of the horizontal paddle dryer without an additional removal of washing heads during the washing of the dryer. The horizontal paddle dryer of the invention has a specially shaped interior wall (1) of the drum (2) that passes on the upper part through two surfaces (1a, 1b) that extend tangentially to the interior wall (1) into a horizontal final surface (1c) of the internal wall (1), such that a slightly concave part is created in the interior of the drum (2) in the wall (1), in which concave part retractable washing heads (3) are arranged that do not hinder functioning of the rotor (4) with paddles (5) either during drying or during washing.

Claims

1. A horizontal paddle dryer, comprising: a drum; a rotor with paddles arranged in the drum; an internal wall within the drum, the internal wall comprising: a circular lower portion, two diagonal surfaces that each tangentially extend on opposite sides of the circular lower portion, and a horizontal surface between and connecting opposite distal ends of the diagonal surfaces, wherein the circular lower portion, the diagonal surfaces, and the horizontal surface of the internal wall of the drum form a concavity; and washing heads arranged at the opposite distal ends of the horizontal surface at points in which the horizontal surface connects to and meets the diagonal surfaces, wherein the horizontal surface is in between the washing heads.

2. The horizontal paddle dryer according to claim 1, wherein the washing heads are arranged as to not hinder functioning of the rotor with paddles.

3. The horizontal paddle dryer according to claim 2, wherein the washing heads are arranged within the drum during both a drying phase and a washing phase.

Description

(1) The invention will be explained in more detail by way of an embodiment and the enclosed drawings, on which

(2) FIG. 1 shows a view of a horizontal paddle dryer of the invention without a front cover;

(3) FIG. 2 shows a side view of a horizontal paddle dryer of the invention in partial cross-section;

(4) FIG. 3 shows a top view of a horizontal paddle dryer of the invention.

(5) A horizontal paddle dryer of the invention that is shown in the enclosed figures has an internal wall 1 of an oblong, substantially cylindrically shaped drum 2 that is reshaped at the top as shown in FIG. 1. The internal wall 1 passes from a round shape into two sections 1a, 1b that extend tangentially to the internal wall 1, said sections merging at the top with a horizontally arranged section 1c of the internal wall 1. A concave part of the internal wall 1 along the entire length of the drum 2 is thus created.

(6) A rotor 4 with paddles 5 is arranged within the drum 2. It is evident from FIG. 1 that the paddles 4 which closely touch the internal wall 1 of the drum 2 do not touch the arranged retractable washing heads 3.

(7) In this way a space is created at the top of the internal wall of the dryer of the invention that allows a permanent insertion of the retractable washing head 3 in the dryer's drum 2 in the area of sections 1a and 1b of the internal wall 1 without the heads disturbing the functioning of the dryer.

(8) Due to the permanently inserted retractable washing heads 3 which are in a closed-tighten position during the drying phase and allow undisturbed operation of the dryer, washing of the interior of the drum 2 is simplified as the washing heads need not be inserted and removed in each individual washing phase. Besides, the rotor with the paddles can rotate during the washing and this provides for a more rapid and more effective washing of the horizontal dryer. Additionally, there are no covered surfaces that cannot be reached by the washing head during washing.