Device for burning liquid fuel waste

 

(57) Abstract:

The invention can be used in the chemical industry and other sectors of the economy that generate combustible liquid waste and requires disposal of the combustion installation. The device is equipped with an additional tier of secondary air nozzles located at the level of the average cross section of the hearth. 1 Il.

The invention relates to a device for neutralizing the liquid process waste method and can be used in chemical, petrochemical, industrial, energy and other sectors of the economy that generate combustible liquid waste with a high-boiling components.

Known burner device for fire decontamination liquid combustible wastes containing cylindrical prechamber with tier secondary air nozzles, and tub of bubbling smaller diameter provided with a conical chamber hearth. Due to located inside of the bath bubble lattice, made in the form of inverted perforated holes of the Cup when the device is in the bath creates a layer of frothy foam with favorable Herod the good performance of brythonic and improves the performance of the decontamination process. A large proportion of relatively small drops in brythons, allowing a high rate of evaporation, increases the completeness of the firing processing of substances with minimum dimensions of the combustion chamber.

The disadvantages of the mentioned devices is the coking burners in nadsloevom space (the separation zone, the nozzle, the walls of the pre-chamber near poda) when burning liquid process wastes containing high-boiling organic components that require periodic shutdown devices for the appropriate repairs. Coking predpremernogo separation space from waste incineration with high-boiling components is caused by the presence of the primary fuel-air mixture of coarse droplets waste that is larger than 300 μm. These droplets upon contact with the walls of the hearth after evaporation of light fractions of the waste form on them coke residue. After prolonged use of the device coke growths, continuously increasing, gradually terminate access of waste in the area of neutralizing them and require periodic removal.

The purpose of the invention improve the reliability of neutralization coking waste with the exception of coking walls of the pre-chamber below the secondary nozzles in the States creation in the separating space below the level of the secondary air nozzles aerodynamic environment promoting efficiency washer air flow surfaces, fencing around the perimeter of the separation zone. This deteriorates the contact of the droplets with the conical surface of the floor, which reduces the likelihood of coking. In addition, possible nabros drops on the surface of the conical pod eliminates the additional air flow fed parallel to the surface of a layer below the level of the input primary flow secondary air. To reduce energy losses for more air flow, improving the capture and transport of droplets of waste from the separation zone to the combustion zone with the exception of contact of the droplets with the walls of the hearth enter this thread close to the axis of the device.

The technical result of the invention is that the device for burning liquid combustible wastes containing a cylindrical chamber with secondary air nozzles, and tub of smaller diameter provided with a conical chamber hearth, the device is equipped with an additional tier of the secondary air nozzles. When this layer is located at the level of the average cross section of the hearth.

The purpose of this model is the protection of the inner surface of the inclined hearth from surge drops when podarilova zone baths.

In the case of approximation of the additional nozzles to the axis of the device, the distance between opposing nozzles additional tier lower than for the main nozzles, and a portion of the secondary air in pricelevel region is embedded in the Central part of the separation space, along with the main part of the generated droplets and carrying them up the center of the device, eliminating the contact of the droplets with the enclosing surfaces, and, consequently, preventing coking of the latter.

Such features as the additional tier of secondary air nozzles located at the level of the average cross section of the conical hearth with the approach of the nozzles to the axis of the device, in a known technical solution is available and claimed for the first time.

The drawing shows a device for burning liquid fuel waste.

The device includes a cylindrical chamber 1, is provided in the upper part of the recess 2 to output of products of combustion, and in the lower part of the conical hearth 3. Within the walls of the pre-chamber 1 above the hearth 3 around the perimeter of the completed secondary air nozzle 4 provided with a duct 5. At the level of the average cross section of the conical under 3 equipped DOPOLNITEL pipe 8 for supplying liquid waste and bubble bars 9, which is in communication with the bottom of the box 10 primary air.

The device operates as follows.

Liquid combustible waste through pipe 8 enters the tub 7 on the surface of the bubble lattice 9. Through the frame 10 beneath the grid 9 is served bubbling agent (primary air) in an amount proportional to the performance of the device.

After bubbling agent through the grid openings 9 into the bath 7 inside of the bath 7 is formed dynamic hatridge layer from the surface of which in the destruction of the tapes bubbles are entrained droplets and couples retreat. The consumption of liquid waste through the pipe 8, is set in accordance with the performance of the device such that when the initial layer height 60-80 mm height two-phase foam system exceeded protruding into the bath 7 a part of the bubble lattice 9. Consumption bubbling agent through the duct 10 through the hole lattice 9), so that when the speed of bubbling in the upper section of the bath 7 of the order of 0.9-1.3 m/s ensure reliable separation back into the bath 7 large droplets (diameter more than 600 μm). The stepped profile of the grating 9 with a projecting part in the bath center 7 provides the greatest density of brythonic along the axis of the device when the minimum is 1 enters through the main nozzle 4 (upper level) and additional nozzles 6 pod 3 (lower level) with a speed of 30-40 m/s Cross-section of the nozzles 4 and 6 take such that the flow rate of secondary air supplied into the chamber 1 through the lower tier (nozzle 6), accounted for 30-50% of total consumption, oxidation supplied through the duct 5.

The distributed supply of secondary air by tier (on the nozzles 4 and 6) at different removing them from the axis of the device in terms of conical hearth 3 (at offset nozzles in the vertical and radial direction) creates a favorable wind conditions between the nozzle 4 and an EN 7 when effective recirculation of air jets nozzles after 6 due to reverse currents radially washed air to the inner surface of the hearth 3. This prevents contact of the droplets with the hearth 3 when their possible application. In addition, converging toward the center of the jet of air emerging from the nozzles 6, push, shift brythons departing from the periphery of the base of the hearth 3 to the axis of the device, preventing the surge drops to under 3 and not allowing it to coking. Extra nozzles 6 in the vicinity of the axis of the device in contrast to the main nozzles 4 leads to the introduction of pricelevel area part of the secondary air in the Central part of the separation zone above the hearth 3. In this case, pairs and small drops of waste, transform the property carried up to the level of the nozzle 4 with the exception of contact of the droplets with the hearth 3.

The optimal location of additional tier nozzles 6 secondary air corresponds to an average cross-section of the conical pod 3. In the case of approximation tier nozzles 6 to the main nozzles 4 is deteriorating effect of interaction between adjacent streams of secondary air, which degrades air washes the surface of the hearth 3 and leads to the formation of coke buildup in the bottom of the hearth 3. In addition, deteriorating OTDELENIE drops departure from pod 3, which increases the rate of coking. Approximation tier nozzles 6 to the base of the hearth 3 contributes to stagnant zones at the surface of the conical hearth 3 between the tiers of the nozzles 4 and 6 and, as a consequence, to the formation of coke buildup. In addition, when approaching nozzles 6 to the surface layer of the waste bath 7 deteriorates the separation effect with the capture stream of large droplets and their application in under 3 with its subsequent carbonization.

Small drops and a couple of waste above the level of the nozzles 4 and 6 are burned in the volume of the pre-chamber 1 in the stream of secondary air supplied in an amount to provide an excess air factor of from 1.1 to 1.15, and subjected to firing ordnance. Products fire-processing of the pre-chamber 1 through the breach 2 is removed outside of the device for dalneishih is the notes bubbling device under fire decontamination fluid coking waste besporyadochniy way.

DEVICE FOR BURNING LIQUID COMBUSTIBLE WASTES containing a cylindrical chamber with secondary air nozzles, and tub of smaller diameter provided with a conical chamber floor, characterized in that it is provided with an additional layer of secondary air nozzles located at the level of the average cross section of the hearth.

 

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