SI9300322A - An apparatus for producing the bricks from ceramic material - Google Patents

Abstract

A plant for producing bricks made of ceramic material has a device (12) for preparing the ceramic material with water and steam, a device (14) for pressing the bricks, a device (18) for drying the bricks and a device (34) for baking the dried bricks. In addition, a device (22) is provided in which the emissions from the drying device (18) are condensed.

Description

Wienerberger Ziegelindustrie Aktiengesellschaft

Ceramic masonry unit

The present invention relates to a plant for the manufacture of bricks from a ceramic material with a device for preparing ceramic material using water and steam, a device for compressing the masonry, a device for drying the masonry and a device for firing dried masonry.

Known installations of this type comprise three parts from which emissions from the environment can be emitted:

This is a steam boiler in which the steam required to plasticize the clay material is produced. However, since the emissions from the steam boiler are largely dependent on the fuel used in the boiler, they are known and can be controlled by conventional technologies. Until e.g. natural gas is used to produce the steam required for the preparation of the clay material, with almost no harmful emissions.

A further source of emission is that most of the moisture is absorbed after the compression of the clay material into the blocks in the intended preparation, especially in the tunnel dryer. The resulting steam thus naturally discharges portions of ceramic material which are unknown in their composition and extent and which have not been taken into account so far.

In the following, the bricks are burned in the intended preparation, in particular in the tunnel furnace, with their counter-flow with respect to the combustion gases. The emissions from the tunnel kiln thus contain, on the one hand, residual combustion and, on the other hand, also proportions of ceramic material. In order to avoid damaging the environment, it is known that emissions from the tunnel kiln, before being discharged through the chimney, are cleaned by means of filter devices.

The present invention is based on the realization that there is a requirement not only to emit emissions from the tunnel kiln before being emitted into the atmosphere, but that this requirement also relates to the emissions emitted by the masonry drying device, and bear in mind that the preparation of ceramic material requires water that has so far been extracted from external water sources in such plants. The object of the present invention is therefore to create a plant for the production of masonry ceramic material, from which less harmful emissions are emitted into the environment, as is the case with the known plants, in addition to which the water required is obtained from the plant itself for the preparation of the ceramic material.

According to the invention, these tasks are solved by providing a device in which the emitted emission is condensed from the drying apparatus. Further, a device is preferably provided for preparing the condensed water.

In particular, the steam emitted from the drying apparatus condenses in the heat exchanger. In this case, the water obtained by codification can lead to the preparation for the preparation of ceramic material. Further, condensation of the obtained water can lead to the preparation of a device from which it is delivered to a steam boiler for steam or water development. into the sewage canal. Mechanical and chemical purification by condensation of the obtained water may follow in the preparatory device.

The plant according to the invention is hereinafter presented in more detail with the aid of the embodiment shown in FIG. 1 is a schematic representation of such a plant, and FIG. 2 is a part of this plant which according to FIG. 1 shown on an enlarged scale.

As shown in FIG. 1, by means of a transport device, e.g. wheel loader 1, emits ceramic material such as clay, to a further conveyor such as e.g. trough feeder 2, which feeds the wheel crusher 3. In the wheel crusher 3, to which water is supplied through the conduit 4, plasticizing and homogenizing of the clay material is followed. From the wheel crusher 3, the material deposited is then fed to the first roller assembly 6 and then to the second roller assembly 7 in which it is subjected to coarse and fine grinding.

The ground material is fed from the second roller assembly 7 through a conveyor device, in particular conveyor belt 8, to an intermediate storage facility 10, which is stored for one to two weeks. In the intermediate storage 10, the subsequent crushing of clay particles is required for further processing of the material. For storage, the crushed clay material is removed from the intermediate storage 10 with an excavator 11 and then fed to a double-shaft mixer 12, in which water supplied to it is mixed via conduit 13. From the double shaft mixer 12, the material is fed to the worm press 14 in which a clay beam is produced, which is then divided into individual blocks 16 by the cutting device 15.

The bricks 16 thus formed are mounted on the drying wagons 17 and are thereby guided through the drying device, in particular the tunnel dryer 18. The saturated steam from 30 ° to 50 ° C is discharged from the tunnel dryer 18 through the exhaust line 19 to the preparation device 20. water vapor, which is further described by FIG. 2.

The resulting blocks from the tunnel dryer 18 are separated and in a further step applied to the furnace wagon 33 by means of a settling machine 32, through which they are guided through tunnel kiln 34. In the tunnel kiln 34, the bricks are fired, guided in the direction of the arrow. A, by contrast, the flue gases are countercurrently directed in the direction of arrow B. After filtering and preparation, the flue gases are discharged into the atmosphere via the fireplace 35. After the oven wagons 33 have left the tunnel furnace 34, the burned bricks are transferred to the pallets by means of a grab 36. 37. In the next step, the pallets 37 are moved to the container 38, which is surrounded by foil. With the help of the forklift 39, the pallets 37 are transferred to the storage 40, followed by the removal by the truck 41.

In FIG. 2 shows a device 20 for preparation from a tunnel dryer 18 via emitted 19 ducts consisting of a heat exchanger 22 in which the supply air is heated through the port 23, and in which condensed water vapor condenses through the conduit 19. Condensed water emitted from the condenser of a functioning heat exchanger 22 is discharged via conduit 24 to a water basin 25. From the water basin 25 a conduit 4 is passed to the wheel crusher 3. This removes the water required in the wheel crusher 3 from the water tank so that the thread does not need any external water source.

Through further conduit 27, water from the water basin 25 is directed to a preparatory device 28, in which water is mixed with a portion of the ceramic material by mechanical treatment, such as e.g. further purified by filtration and chemical treatment such that it can be discharged via conduit 29 to a steam boiler 30 which develops the steam required in the double shaft mixer 12 and, on the other hand, to a duct 31 waste water.

The condensation from the drying apparatus 18 of the emitted steam and the subsequent preparation in the condenser 22 of the recovered water thus prevents the emission of environmentally harmful constituents containing the emission from the drying device 18. In addition, the water required for the preparation of the clay material in the wheel crusher and, on the other hand, for the steam development in the steam boiler required in the double-shaft mixer, is recovered in the plant, thus there is no requires the supply of water from an external water source.

Wienerberger Ziegelindustrie

Claims (6)

PATENT APPLICATIONS A plant for the manufacture of bricks from a ceramic material, with a preparation for the preparation of ceramic material by means of water and water vapor, a device for compressing the masonry, a device for drying the masonry, and a device for firing dried masonry, characterized by the condensation device (22) preparation of (18) broadcast emissions. A plant according to claim 1, characterized by the preparation (28) in which the water obtained by condensation is prepared. Plant according to claims 1 and 2, characterized in that the water vapor emitted from the drying device (18) condenses in a heat exchanger (22). Plant according to claims 1 to 3, characterized in that the water obtained by condensation leads to a device (3) for preparing a ceramic material. Plant according to claims 2 to 4, characterized in that the water obtained by condensation is led to a treatment device (28), from which it is delivered to a steam boiler (30) for the development of steam or water. into the sewage canal. Plant according to claim 5, characterized in that the preparatory device (28) is followed by mechanical and dry-cleaning by condensation of the obtained water. Wienerberger Ziegelindustrie Aktiengesellschaft For him: 22908-V / 93-Iv SUMMARY The invention relates to a plant for the manufacture of bricks from a ceramic material with a device 12 for the preparation of ceramic material using water and water vapor, a device 14 for compressing the masonry, a device 18 for drying the masonry and a device 34 for firing dried masonry. Furthermore, there is provided a device 22 in which the emitted emissions 18 are condensed from the drying apparatus 18.