Afterburner waste

 

(57) Abstract:

The invention relates to thermal treatment of waste. Afterburner waste contains metal cylindrical housing with end flanges and a lining 3 of refractory material. The enclosure is equipped with a shirt with fittings for the supply of the cooling agent. The lining has a Central axial channel is not less than 70 mm with holes for input and output gases in diameter (0.3 to 1.0)d, which is filled by a nozzle of the material lining the size of each element of the lining (0.15 to 0.3)d. 2 C.p. f-crystals, 2 Il.

The invention relates to a device for thermal processing of waste and can be used in the chemical industry and utilities to reduce the toxicity of emissions from reactor thermal waste treatment.

A device for combustion of a gaseous combustible wastes providing touch the flame front of the combustion chamber walls [1]

The device comprises a reaction chamber of a tunnel type with increased diameter and length: Dt3Dg, Lt(3 4)Dg. The Central angle of the straight torch is approximately equal to 25 degrees, which provides a touch of the torch on the wall, excluding the suction Gorna wall. However, due to heat exchange with the wall of the furnace combustion does not exclude the possibility of formation of parietal layer of gas, which is the preservation and (or) harmful organic compounds such as polychlorinated dioxins from unburned soot particles and radicals are always present in the flame.

A device for post-combustion of waste in the form of a lattice of refractory material, allowing to carry out the process at temperatures above 1250 K in aggressive and destructive wall surface cold layer by creating barriers to gas flow [2] However, immediately after the grating wall surface layer is formed again, resulting in this decision turns out to be unsuitable for processing toxinogenic waste requiring residence time of at least 2 to 4 in the zone with a temperature of 1400 to 1600 K. the Increase in the thickness of the grating is not effective because of the cold gas in the outer channels. Repair lattice is hampered by the necessity for its removal.

The closest in technical essence to the proposed device is the backburner containing the metal housing in the form of a cylinder with a diameter of 50 mm stainless steel IN the water heat-insulated on the outside with a layer of quartz glass wool. Inside the body cavity performs the function of the reaction chamber. The heating of the reaction chamber is carried out to the adiabatic temperature of combustion Dogileva mixture (1250 K) and is aimed at the destruction of the cold parietal layer of gas. In operation, the camera input serves the products of incomplete combustion of kerosene with a temperature of 750 to 850 K. the fullness of the afterburning is 55% [3]

The reason preventing people from getting in a known technical solution required technical result is the following.

The material of the afterburning zone does not provide the possibility of working in corrosive environments, formed, for example, incineration of chlorinated wastes. Heating by means of wire is not possible to work at temperatures above 1300 due To the possibility of entering the heater failure, this temperature is insufficient for combustion of polychlorinated dioxins, which effectively takes place at temperatures above 1400 K. the Low degree of afterburning is also likely related to the low temperature of the reaction zone. The operation of similar devices shows that in case of heater failure repair requires complete removal of teploizolaziya in improving reuse and simplifying repair backburner.

The technical result, which can be obtained by carrying out the invention, is that the improvement of the conditions of the combustion chamber is achieved through the destruction of the laminar cold parietal layer of the gas responsible for the formation and preservation of toxic compounds. If the cause of the destruction of the laminar layer is the gas exchange between the core flow and wall surface area and turbulence in near-wall layer showerhead.

The technical result is achieved by the fact that in the post combustion wastes containing metal housing in the form of a cylinder with end flanges, the inner surface of the chamber is provided with a lining of refractory material with a Central axial channel of diameter d is not less than 70 mm with holes for input and output gases in diameter (0,3 1,0)d, filled with a nozzle made of a material lining size of each element (0,15 0,3)d.

The technical result is also achieved by the fact that the nozzle is made in the form of Raschig rings, cylinders, balls or lump material, the inner diameter D of the camera has a size of not less than 200 mm and the length L (2 10)D, and the camera body is equipped with a jacket for cooling.

In Fig. 1 shows a General view of the proposed device is about the condition 1 with an inner diameter D of not less than 200 mm and length L, equal to from two to ten D with flanges 2 at the ends, with internal insulation lining 3 with a thickness up to 0.4 D from corrosion and heat - resistant material, such as silica, with a Central internal channel diameter d of not less than 70 mm, the ends of which are input and output openings for digemari gas in diameter from 0.3 to 1d. Inlet by means of a flange of the second combustor connected with the source of high temperature gas, for example, combustion of waste. The housing can be provided with a jacket 4 with fittings 5 for supplying a cooling agent, for example, water or air. The inner channel Converter-filled nozzle 6 from the same material of the lining, the size of each element (0,15 0,30)d. The nozzle may be made in the form of balls, cylinders, Raschig rings, lumpy material.

The device operates as follows.

Into the inlet serves exhaust gases from the combustion chamber waste with an average temperature of 1000 To 3000 and with a minimum speed of 30 m/s the Flow is broken by the nozzle 6 into separate streams, which are at different angles of attack are faced with each other and with the wall of the lining 3 along the length of the camera, not allowing to stabilize parietal and flow rate not lower than 30 m/s the flow of gas when driving to the wall through the nozzle retain a sufficient pressure to destabilize the process of formation of cold parietal layer, that ensures the efficiency of the afterburner. Lining reduces heat loss to the environment and protects the camera body from high temperature and corrosive environments. From the gas chamber via the outlet port is directed to further processing. The proposed device allows for proper selection of the thickness and material of the lining and tips to handle corrosive gases at temperatures above 1250 K, the nozzle contributes to the relative delay in the chamber solid carbon particles, which is the primary material for the resynthesis of dioxins and thus their active burnout, lack of cold parietal layer contributes to a better burnout heat resistant organic compounds, the required contact time is provided free choice of the internal volume of the channel lining. Repair is limited to desapareceu channel nozzle.

1. Afterburner waste, comprising a cylindrical metal housing with holes for input and output gas, lined with refractory material channel filled with gas-permeable nozzle, wherein the internal channel has a diameter d of not less than 70 mm, the hole sizes of the input and output gas diameter is Ipanema in the form of Raschig rings, balls or lumpy material.

3. Luggage under item 1, characterized in that the camera body with an inner diameter of not less than 200 mm is equipped with a jacket for cooling.

 

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