WO2004089548A1

WO2004089548A1 - Device for treatment of assorted glass and electronic waste

Info

Publication number: WO2004089548A1
Application number: PCT/CZ2003/000075
Authority: WO
Inventors: Vaclav Hrabak; Lubomir Stolc; Dana Hrabakova; Jan Hess; Jiri Grabovsky
Original assignee: Aquatest A. S.
Priority date: 2003-04-07
Filing date: 2003-12-18
Publication date: 2004-10-21
Also published as: CZ2003975A3; AU2003294606A1; CZ293644B6

Abstract

The device for dry treatment of assorted glass and electronic waste, particularly of cone and metallic screens using the invention, consists of a horizontally placed rotary rasping drum (1), at least partly enclosed in the suction bell (3); the drum (1) is equipped with the receiving hopper (5). The drum (1) is connected to the sorting part, where there are at least two sieves of different mesh sizes and the sorting part and the suction part and the bell (3) are dust-proof sealed and equipped with suction equipment; the drum (1) is located on the supporting frame (6) and the drum (1) is firmly connected to the drive (13) shaft (4) also located on the supporting frame (6). The mesh size of the first sieve (2) is 3 through 10 mm and the vibration sieve (17) is 0.3 through 3 mm. The equipment may be both continuous and discontinuous.

Description

Device for treatment of assorted glass and electronic waste

Field of technology

The invention is a device for treatment of assorted glass and electronic waste, particularly of cone and metallic screens, in order to recycle the glass at a glass factory manufacturing glass screen parts.

Colour picture screens consist of two parts - a metallic screen made of barium glass and a cone made of lead glass. Inside the picture tube there is a so-called mask (steel metal sheets) and on the inner side of the metallic screen, there is a layer of colour luminophore (red, blue and green) or also aluminium micro layer. The cone glass is covered by graphite, Fe oxides and an acrylate binder layer (active layers). Black and white screens are made up of a metallic screen and a cone of the same glass material bound by fusion. There is no structure inside the screen. On the inner s ide, there is a luminophore layer, which is zinc blend and zinc-cadmium sulphide. The cone glass is covered by graphite, Fe oxides and an acrylate binder layer.

Current status of technology

At present, the sorting of cone and screen glass is done manually, including monitoring of other mechanical sorting methods based on different properties of the glass material. Cleaning of the glass followed by removal of unwanted components from the glass is done using wet and dry methods. When using the wet method, the layers on the glass are removed in a water environment through mechanical rasping or treatment by chemicals releasing the layers from the glass surface, impurities are concentrated in this aqueous environment as sludge. Wet technologies are commonly used abroad. In the aqueous environment, the impurities of the layers are removed and pass into fine components. However, there are problems with water management in winter, with sedimentation of fine sludge components due to the micron size of graphite, luminophore and Fe oxides and with draining of the sludge. The wastewaters show levels of dissolved Pb from the glass over the limits allowed by the relevant Decree of the Ministry of the Environment. Also, there are technological problems with magnetic separation of wet products.

The dry method involves mechanical rasping of the layers on the glass. The impurities are removed by suction during rasping. One disadvantage of this method is that the material being processed should be dry; any moisture could lead to the impurities sticking, resulting in imperfect cleaning. In addition, excellent dust removal must be provided.

This method is not yet used in practice.

Summary of the invention

The device for dry treatment of assorted glass and electronic waste, particularly of cone and metallic screens using the invention, consists of a horizontally placed rotary rasping drum, at least partly closed in the suction bell; the drum is equipped with a receiving hopper. The dram is connected to the sorted part where there are at least two sieves of different mesh sizes. The sorting part, the suction part, and the bell are dust-proof sealed and equipped with suction equipment; the drum is located on a supporting frame and connected to a drive shaft also located on the supporting frame. The mesh size of the first sieve is 3 through 10 mm and the second vibration sieve is 0.3 through 3 mm.

For more intensive glass rasping, the drum has a built-in extension allowing increased contact with the surface of the material during rotation.

The device can work in continuous and discontinuous modes.

The continuous device consists of a horizontal rotary rasping drum whose first frontal side is equipped with a receiving hopper. On the second frontal side is the first discharger followed by the first cone-shaped sieve, whose narrower side is fixed to the drum using a ring and the wider side is freely open to the enclosed dust-proof space of the suction bell. On the top, the bell is equipped with a hole for air suction and in the lower part of the bell under the first sieve, there is the second discharger of waste material connected to the second vibration sieve. In the remaining space of the suction bell there i s the third d ischarger o f cleaned glass; the discharging end o f the rasping drum with the cone-shaped sieve is fixed using the ring, from which at least three arms are guided inside the drum to grasp the electric-motor driven shaft. On the opposite side of the drum equipped with the hopper there is a rasping drum installed on at least two non-driven rolls located on the frame. The suction bell is also equipped with the first sealed opening for the shaft and the second sealed opening for the drum ring. It is advantageous that the inclination of the supporting frame is adjustable towards the horizontal level.

The hopper freely goes through the opening in the first frontal side of the drum.

The discontinuous device has the whole drum including the hopper located in the suction bell; the first frontal side of the drum is firmly connected to the hollow shaft not going through the drum; the second frontal side is connected to the hollow shaft reversibly located on the frame; the suction bell is connected to the sorting part, where there are at least two vibration sieves.

One advantage of the dry method is that the cleaning products are dry and can be melted down in a furnace without additional drying. The efficiency of rasping dry impurities is significantly higher.

Pneumatic separation of paper and plastic coats is more efficient.

There are no problems with running the technology in winter.

Summary of figures Figure 1 depicts the discontinuous version Figure 2 depicts the continuous version List of items

1 drum

2 first sieve

3 suction bell

4 shaft

5 receiving hopper

6 supporting frame

8 suction opening

9 second discharger

10 third discharger 11 first sealed opening

12 second sealed opening

13 drive

14 rolls

15 arms

16 first discharger

17 second vibrating sieve

18 separation part

19 drum first front side

20 drum second front side

21 suction equipment

Design examples

Example 1

The discontinuous device for treatment of assorted glass electronic waste, especially of cone and metallic screen parts, using the dry method is depicted on Figure 1 and consists of the horizontally placed rotary rasping dram i, which includes the receiving hopper 5 located in the suction bell 3. The dram 1 is located on the supporting frame 6; the dram 1 is firmly connected to the drive 13 shaft 4 also located on the supporting frame 6. The first frontal side 19 of the dram I is firmly connected to the hollow shaft 4 not going through the drum I. The shaft 4 is driven by the electric motor 13. The hollow shaft 4 is connected to the internal part of the dram L The second frontal side 20 is connected to the hollow shaft 4 reversibly located on the frame 6. The suction bell 3 is connected to the sorting part 18_^ where there are at least two vibration sieves; the mesh size of the first sieve 2 is 5 mm and the second sieve 17 0.5 mm. On the top, the suction bell 3 is equipped with a suction opening 8 for sucking out the dust, and suction equipment 21 from the space of the suction drum 3 and from the sorting part 1_8. The assorted dry material is dumped into the dram 1 using the receiving hopper 5, where the material is dry rasped and where impurities or active luminophore layers are rasped off. During the process, dust is sucked through the opening 8 and captured by the suction equipment filter 21. The receiving hopper 5 also works as a discharger for cleaned glass materials, which are then sorted in the sorting part 1_8 where the vibration sieves are located. The first sieve 2 has mesh size 5 mm and the second sieve 17 has mesh size 0.5 mm. The impurities are caught on the second sieve 17. The cleaned glass is obtained from the first upper part of the sieve 2 and the second sieve 17. Air is sucked from the device environment using the hollow shaft 4 and openings for discharge of cleaned glass to the space of the separation part 18 and the suction bell 3.

Chemical composition of colour picture tube glass fragments cleaned using this equipment:

BaO 0.0 - 4.1 % PbO 19.4 - 28.1 %

Batch weight: 200 kg, cleaning time 15 min.

After 15 minutes, cleaned glass fragments were obtained from the first and second sieve of size over 5 mm; weight: 188.8 kg, which is 94.4% of the fragments charge.

Dust impurities 0.1 - 5 mm under the second vibration sieve T7 weighed 4.4 kg, i.e. 2.2% of the batch weight.

The impurities captured by the filter of the suction device 21 weighed 6.8 kg, which is

3.4% of the batch weight. Quality of cleaned glass fragments with respect to weight of the cleaned fragments:

Organic substance content max 0.001 % Coats (graphite etc.) 0 %

Fe/Fe₂O₃ (surface contamination) max 0.0002 %

Metal Fe 0 %

Other contamination 0 %

The quality of the cleaned glass fragments conforms to the standard for further processing of waste glass in glassworks.

Example 2

Using the same equipment, metallic screens from colour TV sets were cleaned. Chemical composition: BaO 0.8 - 4.6 % PbO 6.5 - 10.3 %

Batch weight: 200 kg, cleaning time 10 min. After 10 minutes, cleaned glass fragments were obtained from the first and second sieve of size over 5 mm; weight: 192.7 kg, which is 96.35 % of the fragments charge.

Dust impurities 0.1 - 5 mm under the second vibration sieve 17 weighed 3.4 kg, i.e.

1.7% of the batch weight. The impurities captured by the filter of the suction device 21 under 0.1 mm weighed 3.9 kg, which is 1.95% of the batch weight.

Quality of cleaned glass fragments with respect to weight of the cleaned fragments

Organic substance content max 0.001 %

Coats (graphite etc.) 0 % Fe/Fe₂O₃ (surface contamination) max 0.0002 %

Metal Fe 0 %

Other contamination 0 %

The quality of the cleaned glass fragments confoπns to the standard for further processing of waste glass in glassworks.

Example 3

Using the same equipment, fragments from metallic screens and cones of TV sets were cleaned.

Chemical composition: BaO 5.6 - 7.3 % PbO 7.1 - 10.0 %

Batch weight: 200 kg, cleaning time 10 min.

After 10 minutes, cleaned glass fragments were obtained from the first and second sieve of size over 5 mm; weight: 190.7 kg, which is 95.35 % of the batch weight.

Dust impurities 0.1 - 5 mm under the second vibration sieve J 7 weighed 4.4 kg, i.e. 2.2% of the batch weight.

The impurities captured by the filter of the suction device 21 under 0.1 mm weighed 4.9 kg, which is 2.45% of the batch weight.

Organic substance content max 0.001 % Coats (graphite etc.) 0 %

Fe/Fe₂0₃ (surface contamination) max 0.0002 %

Metal Fe 0 % Other contamination 0 %

Example 4

Using the same equipment, fragments from black and white metallic screens of TV sets were cleaned.

Chemical composition: Si0₂ 65 +/- 10 % A1₂0₃ 4.0 +/- 0.5 %

Na₂O 8.5 +/- 0.5 % BaO 12.0 +/- 2.0 %

K₂0 7.0 +/- 0.5 %

Fe₂0₃ max. 0.02 %

Batch weight: 200 kg, cleaning time 22 min.

After 22 minutes, cleaned glass fragments were obtained above the first and second sieve of size over 5 mm; weight: 186.7 kg, which is 93.35 % of the batch weight. Dust impurities 0.1 - 5 mm under the second vibration sieve 17 weighed 5.4 kg, i.e. 2.7% of the batch weight.

The impurities captured by the filter of the suction device 2! under 0.1 mm weighed 7.9 kg, which is 3.95% of the batch weight.

Quality of cleaned glass fragments with respect to weight of the cleaned fragments Organic substance content max 0.001 % Coats (graphite etc.) 0 %

Fe/Fe O (surface contamination) max 0.0002 %

Metal Fe 0 %

Other contamination 0 %

The quality of the cleaned glass fragments conforms to the standard for further processing of waste glass in glassworks. The discontinuous e quipment i s p articularly used for smaller quantities of processed waste. Example 5

The continuous devices consist of the horizontal rotary rasping dram 1, whose first frontal side 19 is equipped with the receiving hopper 5 and the second frontal side 20 is the first discharger 1_6 followed by the first cone-shaped sieve 2, whose narrower side is fixed to the drum I using a ring 7 and the wider side is freely open to the enclosed dust- proof space of the suction bell 3. On the top, the bell 3 is equipped with a hole 8 for air suction and in the lower part of the bell 3 under the first sieve 2, there is the second discharger 9 of waste material connected to the second vibration sieve 17_i in the remaining space of the suction bell 3, there is the third discharger 10 of cleaned glass; the discharging end of the rasping dram i with the cone-shaped sieve 2 is fixed using the ring 7, from which at least three arms 15 are guided inside the drum to grasp the electric-motor 1_3 driven shaft 4; on the opposite side of the dram I equipped with the hopper 5, there is a rasping drum installed on at least two non-driven rolls 14 located on the frame 6; the suction bell 3 is also equipped with the first sealed opening 1_1 for the shaft and the second sealed opening 12 for the drum ring 7.

It is advantageous that the inclination of the supporting frame 6 is adjustable towards the horizontal level. The hopper 5 freely goes through the opening in the first frontal side _19 of the dram . The assorted dry material is dumped into the dram using the receiving hopper 5, where the material is dry rasped and where the i mpurities or the active luminophore layers are rasped off. The fragments go through the glass drum using the first discharger 16 to the rotating cone-shaped sieve 2; undersized fragments fall into the third discharger 10. The cone sieve 2 with mesh size 5 mm allows 5 mm-sized fragments to drop through the second discharger 9 to the second vibration sieve 17 dividing the fractions into glass sizes 0.5 - 5 mm and impurities. During the process, dust is sucked through the opening 8 and captured by the suction equipment filter 2J_. The frontal side _19 around the hopper 5 sucks air into the equipment. The impurities are caught on the second sieve 17. The cleaned glass is received from the first upper part of the sieve 2 and the second sieve 1_7.

The continuous equipment can process 0.7t and 1.5t of glass fragments per hour and can clean to a quality identical with discontinuous equipment. The continuous equipment is designed particularly for manufacturing TV screens made from production waste.

Industrial use

The equipment is designed for treatment of assorted glass electronic waste, particularly for cone and metallic screens, in order to recycle them in the glassworks of TV screen manufacturers.

Claims

Patent claims

1. The device for dry treatment of assorted glass and electronic waste, particularly of cone and metallic screens, using the invention consists of a horizontally placed rotary rasping dram (1), at least partly enclosed in the suction bell (3); the dram (1) is equipped with the receiving hopper (5). The drum (1) is connected to the sorting part, where there are at least two sieves of different mesh sizes and the sorting part and the suction part and the bell (3) are dust-proof sealed and equipped with suction equipment; the dram (1) is located on the supporting frame (6) and the dram (1) is connected to the drive (13) shaft (4) located on the supporting frame as well (6).

2. The device according to claim 1 characterised by the mesh size of the first sieve

(2) is 3 through 10 mm and the vibration sieve (17) is 0.3 through3 mm.

3. The device according to claims 1 and 2 characterised by thatfor more intensive glass rasping, the drum has a built-in extension allowing increased contact with the surface of the material during rotation.

4. The device according to claims 1 through 3 characterised by the continuous device consists of a drum (1) whose first frontal side (19) is equipped with the receiving hopper (5) and the second frontal side (20) of the dram (1) is the first discharger (16) followed by the first cone-shaped sieve (2), whose naπower side is fixed to the dram (1) using the ring (7) and the wider side is freely open to the enclosed dust-proof space of the suction bell (3); on the top, the bell (3) is equipped with a hole (8) for air suction and in the lower part of the bell (3) under the first sieve (2), there is the second discharger (9) of waste material connected to the second vibration sieve (17) and in the remaining space of the suction bell

(3) there is the third discharger (10) of cleaned glass; the discharging end of the rasping dram (1) with the cone-shaped sieve (2) is fixed using the ring (7), from which at least three arms (15) are guided inside the drum (1) to grasp the electric-motor (13) driven shaft (4); on the opposite side of the drum (1) equipped with the hopper (5) there is the rasping dram (1) installed on at least two non-driven rolls (14) located on the frame (6); the suction bell (3) is also equipped with the first sealed opening (11) for the shaft (4) and the second sealed opening (12) for the drum (1) ring (7).

5. The device according to claim 4 characterised by the inclination of the supporting frame (6) is adjustable towards the horizontal level

6. The device according to claims 4 through 5 characterised by the hopper (5) freely goes through the opening in the first front side (19) of the dram (1).

7. The device according to claims 1 through 3 characterised by the discontinuous device has the whole dram (1) including the hopper (5) located in the suction bell (3); the first frontal side (19) of the dram (1) is firmly connected to the hollow shaft (4) not going through the dram (1); the second frontal side (20) is connected to the hollow shaft (4) reversibly located on the frame (6); the suction bell (3) is connected to the sorting part (18) where there are at least two vibration sieves; the mesh size of the first sieve (2) is 3 through 10 mm and the second sieve (17) is 0.3 through 3 mm.