FR2882660A1 - Vertical evaporator/reactor for domestic and industrial effluents has dynamic core with driven spiral screw and inner injection tube - Google Patents

Abstract

The evaporator/reactor consists of a vertical chamber (1) containing one or more dynamic cores (2), each comprising a tubeless spiral screw (3) turned by a motor (4) at the top or bottom and surrounding a double or multiple injection tube (5). The screw spiral can be conical or not, and its pitch can be progressive or simple, while the tube allows the injection of effluent (6) and heating fluid (7). The vertical chamber is e.g. about 150 cm in diameter by 300 cm high.

Description

The present invention relates to a vertical device for evaporation and

  reaction of domestic and industrial effluents.

  The treatment of domestic and industrial effluents is traditionally carried out using devices for physicochemical treatment, drying and thermal destruction.

  Some manufacturers offer devices for physicochemical treatment by aeroflotation and sand filters, ultrafiltration with ceramic membranes, reverse osmosis with one or more stages and treatment with activated carbons. Others propose drying devices by centrifugation, vacuum evaporation, rotary drying drum, flash dryer, belt dryer, fluidized bed, Archimedes screw heat exchangers. Others finally propose thermal destruction devices by incineration, by vapoincinération.

  However, these devices are currently limited to concentrating the treated liquid effluents, reject large gaseous flows that are harmful to the quality of the environment and produce toxic ash. In addition, they are often susceptible to fouling.

  The device according to the invention overcomes these disadvantages. It comprises in fact according to a first characteristic, a vertical chamber equipped with a dynamic evaporated core. This core centralizes the action of the thermal fluid and the evapo-reactive substrate on the effluent to be treated. It consists of a spiral of screw without tube and an injection rod. The diameter and the rotational speed of this turn make it possible to adapt the evaporation and reaction time to the effluent flow rate to be treated. The overflow circulation of the substrate between the outside of the core tube and the inner wall of the vertical chamber allows its homogenization and creates a natural thermal insulation limiting heat losses.

  According to particular embodiments: implantation of one or more dynamic evapo-reactive cores, machining or injection rod positioned at the top or bottom, double-jacketed or multi-tube injection pipe, -Wire screw without conical or non-conical tube, single pitch or progressive pitch, metal construction or not, cylindrical or not, insulated or not, heated or not, - evacuation of steam by natural draft, by suction, by pressure , supply and / or extraction of the evapo-reactive substrates from above, from below, - fasteners of the actuator and the injection rod by bolted flanges to facilitate their maintenance.

  The attached drawing illustrates the invention: FIG. 1 represents in section, the device of the invention.

  With reference to this drawing, the device comprises a vertical chamber (1) equipped with a dynamic dynamic evapo-reactive core (2). This core consists of a screw turn without tube (3) driven by a motor (4) and an injection rod (5). This rod allows the injection of the effluent to be treated (6) and the thermal fluid (7). The supply of the evapo-reactive substrate (8) is carried out through the orifice (9) and the extraction takes place via the orifice (10).

  By way of non-limiting example, the vertical chamber will have dimensions of the order of 150 cm for the diameter and 300 cm for the height.

  The device according to the invention is particularly intended to treat leachates from the landfill of household waste.

Claims (5)

  1) Vertical evaporation and reaction device for domestic and industrial effluents characterized in that it comprises a vertical chamber (1) equipped with a dynamic evapo-reactive core (2) consisting of a spiral of screws without tubes (3) driven by a motor (4) and an injection rod (5).   2) Device according to claim 1 characterized in that the vertical chamber (1) can accommodate one or more dynamic evaporative cores (2), 3) Device according to claim Lou claim 2 10 characterized in that the motorization (4) or the injection rod (5) is positioned in the upper part, 4) Device according to claim 1 or claim 2 characterized in that the motor (4) or the injection rod (5) is positioned in the lower part, 5) Device according to any one of the preceding claims, characterized in that the injection rod (5) is of double jacketed or multiple tube type, 6) characterized conical, 7) Device according to any one of the claims 1 to 6, characterized in that the screw turn without tube (3) is of conical type, 8) Device according to any one of claims 1 to 6, characterized in that the screw turn without tube (3) is single pitch type, in that the screw turn without tube (3) is of the step type Device according to any one of claims 1 to 6 in that the screw turn without tube (3) is not type 9) Device according to any one of claims 1 to 6 characterized progressive.