Apparatus for processing a material mixture comprising of alternative fuel and contaminants

Abstract

The present invention relates to a device for treatment of a material mixture consisting of substitute fuel and impurities, having a vertically aligned central feeder (1), a separating unit (2) arranged underneath the central feeder (1), a rotor mill (3), wherein the rotor mill (3) is arranged above the separating unit (2) and surrounds the central feeder (1), a flow device (4) for generating an upwardly directed gas flow, wherein the rotor mill (3) has a multistage design, and a respective separating device (6) is arranged between the stages (5.1, 5.2) of the rotor mill (3), wherein material mixture not held back by the separating device (6) is further comminuted in the following stage (5.2).

Claims

1. A device for treatment of a material mixture comprising substitute fuel and impurities, the device having a vertically aligned central feeder (1), a separating unit (2) arranged underneath the central feeder (1), a rotor mill (3), wherein the rotor mill (3) is arranged above the separating unit (2) and surrounds the central feeder (1), a flow device (4) for generating an upwardly directed gas flow, wherein the material mixture is introducible into the feeder (1), and sinks to the separating unit (2) after introduction into the feeder (1), wherein in the separating unit (2) the impurities are separated at least partially from the material mixture as an impurity fraction, and the material mixture separated from the separated impurities rises with the gas flow to the rotor mill (3), wherein the rising material mixture is comminuted in the rotor mill (3), wherein the rotor mill (3) has a multistage design, wherein a respective separating device (6) is arranged between a first stage (5.1) of the rotor mill (3) and a second stage (5.2) of the rotor mill (3), wherein the separating device (6) holds back material mixture having a first particle size in the first stage (5.1), and wherein material mixture having a second particle size that is smaller than the first size that is not held back by the separating device (6) is further comminuted in the second stage (5.2).

2. The device according to claim 1, wherein at least one outlet (7.1, 7.2) is allocated to each stage (5.1, 5.2) of the rotor mill (3).

3. The device according to claim 1, wherein the separating device (6) comprises at least one sieve between the stages (5.1, 5.2) of the rotor mill (3).

4. The device according to claim 1, wherein at least the first stage (5.1) of the rotor mill (3) has an annular chamber (9) surrounding tools (8a, 8b), wherein the annular chamber (9) is separated from the tools (8a, 8b) by a grid arrangement (10).

5. The device according to claim 1, wherein the device further comprises a cleaning that is allocated to the separating device (6) between the stages (5.1, 5.2) of the rotor mill (3), and further wherein the cleaning device is configured to detach held back material mixture from the separating device (6).

6. The device according to claim 1, wherein the feeder (1), the separating unit (2) and the rotor mill (3) are together rotatably drivable around a vertically aligned axis.

7. The device according to claim 1, wherein the separating unit (2) comprises a rotatably drivable spreading plate (14).

8. The device according to claim 7, wherein the material mixture is spun from the spreading plate (14) into a chamber that surrounds the spreading plate (14), in which the gas flow rises.

Description

(1) The invention along with the technical environment will be exemplarily explained below based on the figures. Schematically shown in

(2) FIG. 1: is a device for preparing a material mixture consisting of substitute fuel and impurities,

(3) FIG. 2: is a sectional view through the device, and

(4) FIG. 3: is a detailed view of the device.

(5) The device for treatment of a material mixture consisting of substitute fuel and impurities shown on the figures has a vertically aligned feeder 1, which is radially bordered by a hollow cylinder 12. A funnel is formed above the feeder 1, through which the material mixture is introduced into the feeder 1.

(6) A separating unit 2 is formed underneath the central feeder 1, and comprises a spreading plate 14. The spreading plate 14 is non-rotatably connected with the hollow cylinder 12, so that the spreading plate 14 and the hollow cylinder 12 can together be rotatably driven.

(7) Tools are arranged on the exterior side of the hollow cylinder 12 in the form of wing elements 8a and wires 8b, so that they can be rotatably driven along with the hollow cylinder 12 around the hollow cylinder longitudinal axis. The tools 8a, 8b form a rotor mill 3 arranged above the separating unit 2.

(8) The device also comprises a flow device 4 with an inlet 15, a first outlet 7.1 and a second outlet 7.2. The flow device 4 can be operated by blowing in a gaseous operating medium at the inlet 15 or by siphoning the gaseous operating medium at the outlets 7.1 and 7.2. The interior of the device is here configured in such a way that operating medium entering through the inlet 15 flows upwardly past the radially outer edge of the spreading plate 14 and into the rotor mill 3.

(9) The rotor mill 3 has a first stage 5.1, which is allocated to the first outlet 7.1. The rotor mill 3 also has a second stage 5.2, which is allocated to the second outlet 7.2. The tools 8a and 8b of the first stage 5.1 are radially surrounded by a grid arrangement 10, which separates the tools from an annular chamber 9. A separating device 6 in the form of a sieve is also formed between the first stage 5.1 and the second stage 5.2.

(10) The first stage 5.1 and the second stage 5.2 of the rotor mill 3 each comprise a plurality of grouped wing elements 8a helically secured to the exterior side of the hollow cylinder 12, which extend radially outward from the exterior side of the hollow cylinder. The wing elements 8a are aligned at an angle of attack to a horizontal plane. Platelike impact elements 13 are secured to the outer ends of the wing elements 8a. By contrast, scraper elements 11 are secured to several wing elements 8a, and can be used to remove constituents of the material mixture held back by the grid arrangement 10 from the grid arrangement 10. In the upper area of the first stage 5.1, scraper elements can also be indirectly secured to the hollow cylinder 12 as a cleaning device, and used to remove material held back by the separating device 6. The first stage 5.1 and the second stage 5.2 each have wires 8b as tools in the upper area, which are secured to the exterior side of the hollow cylinder 12.

(11) During operation, a material mixture consisting of substitute fuel and impurities is introduced into the vertically aligned central feeder 1, in which the material mixture sinks down to the separating unit 2 comprising the spreading plate 14. The combined rotational movement of the spreading plate 14 and the hollow cylinder 12 bordering the feeder 1 accelerates the material mixture radially outward upon reaching the spreading plate 14 at the latest. The material mixture traversing the outer radial edge of the spreading plate 14 is sifted by the rising gas flow, so that impurities sink down in the chamber surrounding the spreading plate 14, while the remaining material mixture having primarily substitute fuel enters into the first stage 5.1 of the rotor mill 3 along with the gas flow.

(12) In the first stage 5.1, the material mixture is comminuted through interaction with the tools 8a and 8b and among each other. Because the tools 8a, 8b are arranged offset vertically and in a circumferential direction, an effective comminution can take place, wherein comminuted material can pass through the grid arrangement 10 into the annular chamber 9, wherein this part of the material mixture is removed from the first outlet 7.1.

(13) The material mixture passing through the separating device 6 is further comminuted in the second stage 5.2, so that the material mixture exiting the second outlet 7.2 has a smaller average particle size than the material mixture exiting the first outlet 7.1.

(14) Therefore, the device not only allows an especially efficient comminution to take place, but can rather also be used to provided a material mixture with different particle size.

REFERENCE LIST

(15) 1 Feeder 2 Separating unit 3 Rotor mill 4 Flow device 5.1 First stage 5.2 Second stage 6 Separating device 7.1 First outlet 7.2 Second outlet 8a Wing element 8b Wire 9 Annular chamber Grid arrangement 11 Scraper element 12 Hollow cylinder 13 Impact element 14 Spreading plate 15 Inlet