SU1435890A1 - Apparatus for fire disposal of combustible liquid waste - Google Patents

Abstract

The invention is intended for the fire disposal of waste and can be used in chemical plants. electrical industry and other branches of the national economy, where liquid waste with high-boiling components is formed. The purpose of the invention is to ensure the disposal of coking waste with increased productivity of the device. The bubbling bath 1 is tangentially connected to the end of the combustion chamber 5, which is divided by a flat ring 10 into two chambers 11 and 12. Inside the chamber I, adjacent to the bubbling bath, coaxially with the chamber along its entire length, the cylindrical perforated insert 13 is placed, and surface inserts are made tangentially. The device separates the coarsely dispersed droplets from the flow of the generated wide fractional composition as a result of the centrifugal effect when the waste is fed into the grooves / L stuffed vortex flow. 2 Il.

Description

/ J

G /

OO SP

00

g

eleven

9и.г.1

The invention relates to devices for the disposal of liquid TexHOv4orH4ec-waste by the fire method and can be used in the chemical, petrochemical industry, in industrial energy and in other households, where combustible waste is generated and is used by the heat of the installation.

The purpose of the invention is to ensure the disposal of coking waste with an innovative device performance.

FIG. a device structure is presented, a longitudinal section; in fig. 2 shows section A-A in FIG. one.

The device contains a bubbling bath 1 provided with a distribution pen 2 and 2 and pipes 3 and 4 for supplying waste and a bubbling agent (primary air) respectively. Bath 1 is tangentially connected to a horizontally arranged cylindrical combustion chamber 5, equipped with an outlet embrasure 6 and two dushes of nozzles 7, which are enclosed in an air duct 8. An air heater 9 is installed in the air duct 8 before the first nozzles. Inside the combustion chamber 5 there is a flat ring 10, which divides the combustion chamber into the left 11 and right 12 chambers. Inside the left chamber 11, along its entire length, with a gap in relation to the walls of the combustion chamber 5, a cylindrical perforated insert 13 is installed, provided with holes that are tangentially formed.

The device works as follows.

Through pipe 3 into bath 1, liquid combustible waste flows to the surface of distribution grid 2. Through the nozzle 4, bubbling agent (primary air) is supplied under the distribution grid. The proportion of the living cross section of the distribution grid 2 is. so that the speed of the bubbling agent in the holes of the lattice is not less than 8 m / s according to the condition of preventing the "dip of the waste. the flow rate of the bubbling agent through the nozzle 4 is set to such that the speed on the surface of the waste layer does not exceed 16 m / s, and the patch (non-sparged) height from the waste layer in the bath 1 is maintained in the order of 60/80 mm. As a result of the 2-jets of the bubbling agent inside the vapna 1 passing through the holes of the distribution grid, a dynamic gas-liquid layer is formed, from the surface of which into the left chamber 11 a stream of a bubbling agent pours out a pair of waste and drops of a wide fractional composition. Inside the left chamber 11, on its axis, stir, e) 1a is a perforated insert 13, made of refractory material and installed in a gap of 30-50 mm relative to the walls of the combustion chamber 5. Living section for passage of secondary air ie5

5 5

0

0

5 5 0 g

the cut holes of the insert take in the order of 15-20%.

The length of the insert is approximately equal to its diameter. A portion of the secondary air entering the duct 8 is heated in the air preheater 9 to 100-200 ° C, then through the left nozzle 7 enters the gap between the perforated insert 13 and the wall of the combustion chamber S and twists there at a speed of 25-30 m / c. through the openings of the insert in the form of jets is tangentially inserted into the left chamber 11. Thus, an air-gas vortex is created in chamber II within the hot perforated insert 13. In the left chamber 11, waste vapors are ignited and the small droplets begin to burn out, which are flowed through the opening of the flat ring 10 into the right chamber 12. The flat ring 10 retains large droplets of waste in the left chamber 11, ensuring their preliminary preparation for incineration. The diameter of the orifice of the flat ring 10 is half the diameter of its outer bore. Due to the centrifugal effect, large upli move in the gas-air flow within the perforated insert 13. At the same time, they are evaporated to the smallest droplets, which are carried by the gas-air flow through the hole of the flat ring 10 into the right after-burner 12.

To prevent the perforated insert from being coked by 13 large drops of waste, its temperature should be in the order of 1000 ° C. To this end, the insert is prevented from contacting the relatively cold walls of the left part of the combustion chamber 5 (an air gap is provided) and the heating of the air outside the insert is necessary. The presence of the gauge 11, which is an important function of the separation zone for large drops, allows the bubbling of waste in the bath 1 at elevated speeds of 1.1 -1.6 m / s, which ensures inserts high specific performance of the bath and the device as a whole. Part of the secondary air from the air duct 8 through the right russian nozzles 7 at a speed of 25-30 m / s enters the right chamber 12, in the flow of which the burning of small droplets and gaseous neutralization products coming from the left chamber 11 finishes. Fire decontamination products from the combustion chamber are removed outside the device through an output embrasure 6.

A flat ring, dividing the camera into two parts, holds coarse droplets in the left part, only small drops in the first part, which have time to burn. The large drops retained by the ring, repeatedly rotating in the gas-air flow, burn in the left chamber (within the perforated insert) not the coke of the insert walls, the temperature of which

well above the temperature of the inner walls of the cylindrical chamber.

The device is preliminarily separated from the flow of generated droplets of a wide fractional composition of coarse droplets as a result of the centrifugal effect when the waste is fed into the air-gas vortex flow. At the same time, small droplets, which require, by the condition of completeness of neutralization of small volumes and short duration of evaporation, have time to completely burn within the furnace volume. The residence time and evaporation in the zone of neutralization of large droplets is significantly increased due to preliminary centrifugal separation.

The design of the device makes it possible to neutralize liquid coking waste under conditions of atomized spraying of substances with an increased productivity of the device.

Claims (1)

Invention Formula A device for fire disposal of liquid combustible waste containing a bubble bath and a horizontally arranged cylindrical combustion chamber with two nozzles enclosed in an air duct, which is tangentially connected to the chamber end to ensure the disposal of coking waste with increased device performance the combustion, which is divided by a flat ring between two nozzles into two chambers, while inside the chamber adjacent to the bubbling bath 5, coaxially A cylindrical perforated insert is placed along the entire length of the chamber with a gap, and the holes along the surface of the insert are tangential. 0 /five ten  9i, g. 2