SI9200068A2 - A heating source of thermoreactor - Google Patents

Abstract

A pyrolysis and combustion installation for disposing of hazardous wastes, especially of non-recyclable, organic wastes, having - a proportioning installation in which the wastes are accommodated for further processing; - a pyrolysis chamber for the pyrolysis process, the wastes being heated, dried and cracked; - a thermal reactor for the oxidation process, in which the flue gas produced from the wastes is combusted; and - a control device for monitoring and setting process parameters is characterised in that there is provided, for the thermal reactor in its inlet section, a burning device which consists of a multiplicity of individual burners which are arranged around the circumference of the chamber of the thermal reactor, the nozzles of the individual burners each being aligned at an angle alpha with respect to the direction of the gas stream and at an angle beta with respect to the normal to the circumference. <IMAGE>

Description

THERMORACTOR HEAT SOURCE

The process falls within the scope of Incineration of Special Technological Waste

The incineration process - thermal recovery of special waste consists of the following stages:

- heating, drying and gasification of waste in the primary pyrolysis chamber

- mixing, ignition and combustion of the resulting gas in the thermo-reactor

Full combustion in the thermo-reactor requires high temperatures (800 - 1200 celsius), a certain reaction time, proper - complete mixing of secondary air throughout the section, a special chamber design and proper placement of heat sources.

The problems that arise in the incineration of special waste are:

to achieve satisfactory gas mixing and to ensure complete combustion

- evenly distribute the heat input

- Provide necessary burner power control

- Long reactor lengths are required (long reaction time) Previous solutions have been implemented with one higher power burner mounted at a certain angle with respect to the reactor axis. The disadvantages of these procedures are:

- poor gas mixing and incomplete combustion

- Uneven heat input (one load of fireclay)

- Poor regulation of burner power

- large lengths of reactors

Our solution, however, contains a large number of smaller burners (A), that is, partial heat input into the combustion chamber of the thermoreactor (B). By installing burners at the inlet around the perimeter of the chamber (B) at a diameter (D) oriented at an appropriate angle (alpha) with respect to the gas flow direction and at an angle (beta) with respect to the center of the thermo-reactor, four basic advantages are achieved:

- uniform heat intake throughout the section, more favorable loading of the cladding liner,

- higher turbulence - the mixing of the gases and thus more complete combustion,

- the rotational flow of gases and the corresponding increase in the required residence time in the combustion chamber,

- the possibility of reducing the power of the burners (only operates as many burners as are necessary for the process of complete combustion; at startup they operate at full power, feeding the computer).

Claims (1)

PATENT APPLICATION The thermal source of the thermo-reactor (second chamber) is mounted on the inlet part of the chamber, which is coated with a shamotte coating, characterized in that the required amount of heat is divided into an appropriate number of smaller burner sources (A) which are mounted around the perimeter of the chamber (8). (D) directed at an appropriate angle (alpha) with respect to the direction of flow of the gases in the chamber and at an angle (beta) with respect to the center of the thermoreactor.