CS243424B1 - Technological line for production of bituminous mixtures - Google Patents

Abstract

The equipment concerns a technological line for the production of bituminous mixtures and solves the problem paralyzed the environment by helping of the invention, a substantial reduction is achieved sulfur dioxide emissions. Existing bitumen production facilities the mixture was not equipped with any equipment on reduce sulfur dioxide emissions. The device according to the invention operates continuously and represents an additional device by which can be at a low investment cost equip each production line bituminous mixtures. The present invention relates to a desulfurization dispenser the composition, optionally supplemented with a mill, which dispenses the composition into the coupling channel or conveyor belt wet aggregate or on a separate conveyor a passport or a dust separator or a mixer with compressed air. In addition to environmental protection by using vynólezu to achieve confusion of the more valuable fuel and therefore more expensive fuel less fuel β with higher sulfur content. This can result in significant financial savings. The invention is intended for the operation of bituminous plants mixtures.

Description

(54) Bituminous mixture production line

The device relates to a process line for the production of bituminous mixtures and solves the problem of environmental protection by the fact that by the invention a significant reduction of sulfur dioxide emissions is achieved.

Existing bituminous mixture plants have not been equipped with any sulfur dioxide reduction device.

The device according to the invention operates continuously and represents an additional device which can be equipped with every bituminous mixture production line at low investment costs.

The present invention is directed to a desulfurization agent dispenser, optionally supplemented by a mill, which dispenses the agent into a duct or onto a conveyor belt of wet aggregate or on a separate conveyor belt or dust collector or into a compressed air mixer.

In addition to protecting the environment, the invention can also be used to replace more valuable fuel and therefore more expensive fuel with less valuable fuel β with a higher sulfur content. This can achieve significant financial savings.

The invention is intended for the operation of asphalt mixing plants.

AND

243424 2

The invention relates to a process line for the production of bituminous mixtures comprising a wet aggregate transporter and an aggregate dryer connected to a bituminous aggregate mixer and a duct with dust separators.

So far known technology lines for production of bituminous mixtures, such as Teltomat - GDR, Uerini - Italy, Berber Green - England, are not equipped with a device for reducing the content of sulfur dioxide in gaseous emissions.

This circumstance has serious consequences for the environment, especially in those cases where bituminous mix plants are located inside or near protected landscape areas.

Sulfur dioxide has an adverse effect on living organisms, roatlinstvo, especially conifers, on the human organism and also does not fall on technical materials.

These drawbacks are eliminated by the production line for the production of bituminous compositions according to the invention, which is characterized in that it is provided with a dispenser of active sodium carbonate or sodium bicarbonate as a desulfurization agent.

The main advantage of the solution according to the invention is the protection of the environment, which results in a substantial reduction of sulfur dioxide emissions and the possibility of substituting a lower sulfur content for a lower sulfur fuel with a lower sulfur content.

An exemplary embodiment of a process line for the production of bituminous compositions according to the invention is shown in the accompanying drawings, wherein FIG. 1 represents a schematic of the process line: a substantial part of the desulfurization plant is not located in the dotted border area; Fig. 4 shows the dispenser orifice into a dust separator and Fig. 5 shows the dispenser orifice into a pressurized gas desulfurizer mixer.

The main parts of the process line equipped with desulphurisation equipment, shown in Fig. 1, are drum dryers of aggregate 1, coarse dust separator 2, cyclones and multicyclones or filters 2, resin / hot aggregate mixer g, wet aggregate conveyor g, fan 12. chimney 14 a desulfurizing agent container Jg, an intermediate desulfurizing agent container Jg, a dispenser;

JS and mill Jg.

FIG. 2 shows a part of a process line equipped with a desulfurization plant, where the outlet of the dosing unit JS ⁸ or of the built-in mill Jg is connected to a conveyor belt of wet aggregate g.

Referring to FIG. 3, the outlet of the dispenser 16 and of the optional mill 19 is directed to a separate transporter 22. 4 shows a device in which the outlet of the dispenser JSe or of the built-in mill 12 is connected via a line 22 to the gravity separator g.

FIG. 5 shows an apparatus consisting of a dosing unit JS, optionally a downstream mill 18, a desulfurizing agent / compressed air mixer 26 and a tube 25 opening into an aggregate dryer.

In the burner 2 located at the front of the drum dryer J, liquid fuel containing sulfur compounds is combusted. At the opposite end of the drier, wet aggregate is carried by conveyor g into the drier. The heat of the flue gas achieves drying of the aggregate and its heating.

The dry and heated aggregates leave at the opposite end of the dryer χ to mixer g, where they mix with the bitumen. The flue gases leave the dryer after passing through the connecting duct 4 and enter the gravity separators of coarse dust g.

The separated dust is returned to the transporter 3 via the discharge £ and together with the wet aggregate goes back to the dryer 1. The coarse dust separators 1 do not have to be included and the connecting line 4 then transfers the gas from the dryer directly to the dust separators 2.

The fine dust gas flows from the gravity separator 1 via line g to a cyclone or multicyclone battery or filters 2 from which the entrapped fine flow is discharged by the transport device 10 to the dust container.

The flue gas is extracted from the separation device 2 via a duct 11 by means of a fan 12 and blown through a duct 13 into a chimney 14. The active sodium carbonate or sodium bicarbonate is transported from the container 12 to the auxiliary container 12 from there.

From there it enters at one or more locations into line 4 where active sodium carbonate or sodium bicarbonate is dispersed into the gas stream. To improve this dispersion, a turbulence shield 20 may be incorporated in the conduit 4.

Other possible inputs of active sodium carbonate or sodium bicarbonate to the system are: according to FIG. 2, a conveyor belt 1 of wet aggregate with direct access to the dryer 1, according to FIG. 3, not a separate conveyor belt 22 with direct access to the dryer 1, according to FIG.

5 into the gravity separator 2 and, according to FIG. 5, into the mixer 26, from which it is introduced into the drier 1 via a pressure gas 25 through a tube 25. This device achieves a degree of purification of the sulfur dioxide gas 74 9.

The invention can be advantageously used in particular in the production of bituminous mixtures, where, in addition to a significant reduction in sulfur dioxide emissions, it is possible to substitute more valuable and therefore more expensive fuel, i.e. lower S content, for less valuable, i.e. higher S content. significant replacement of less available fuel and significant financial savings.

Claims (8)

SUBJECT OF THE INVENTION A process line for the production of bituminous mixtures comprising a wet aggregate transporter and an aggregate dryer connected by a connection channel with a dust separator and an aggregate with a bitumen, characterized in that it is equipped with a dispenser (18) of active sodium carbonate or sodium bicarbonate. 2. A process line according to claim 1, characterized in that the outlet of the active sodium carbonate or sodium bicarbonate dispenser (18) is introduced into the connecting channel (4) between the dryer (1) and the dust separator (5, 9). 3. A process line according to claim 2, characterized in that a turbulization shield (20) is provided in the connecting channel (4) downstream of the dispenser (18) of the active sodium carbonate or sodium bicarbonate. The process line according to claim 1, characterized in that the outlet of the dispenser 08) of active sodium carbonate or sodium hydrogen carbonate is fed to a conveyor (3) of wet aggregate. 5. A process line according to claim 1, characterized in that the outlet of the dispenser (18) of active sodium carbonate or sodium bicarbonate is led to a separate conveyor (22) which leads to an oven (1). 6. A process line according to claim 1, characterized in that the outlet of the active sodium carbonate or sodium bicarbonate dispenser (18) is connected to a dust separator (5). 7. A process line according to claim 1, characterized in that the outlet of the active sodium carbonate or sodium bicarbonate dispenser (18) is introduced into the desulfurizer / pressure gas mixer (26) built into the pressure gas supply (24), the outlet (25). ) of the mixer is led to the drying chamber (l). A process line according to claims 1 to 7, characterized in that a mill (19) is arranged between the dispenser (18) of the active sodium carbonate or sodium bicarbonate and the end of its outlet.