SU1296788A2 - Method for fire decontamination of waste in various physical states - Google Patents

Abstract

The invention makes it possible to increase the efficiency of the waste incineration process and to improve the working conditions during cyclic loading of solid waste due to stabilization of the hydrodynamic regime in the heat treatment chamber and the flow of blast air. For this, the pyrolysis products are supplied with a gas-liquid jet of sprayed liquid waste, the vacuum in the pyrolysis chamber is maintained by the flow rate of the spraying agent of the ejecting gas-liquid jet. To regulate the optimum air excess in the heat treatment chamber, it is supplied in an amount proportional to the flow rate of the spraying agent. N3; about 05 QO 00 NJ

Description

The invention relates to methods for the disposal of industrial wastes, can be used in the chemical, petrochemical and other sectors of the industry and is in addition to the author. St. No. 800493.

The aim of the invention is to increase the efficiency of the process and improve working conditions during cyclic loading of solid waste.

The method is carried out as follows.

Solid impurities are separated from the liquid waste, a suspension with a viscosity of 6-10 ° WU is prepared from the separated impurities, pasty waste and part of the liquid waste. In the heat treatment chamber sprayed with mechanical nozzles liquid waste that does not contain solid impurities, and pneumatic nozzles - suspension. Waste is incinerated. The products of combustion heat the solid wastes, which undergo pyrolysis. The products of pyrolysis due to the ejection of a gas-liquid jet of the sprayed suspension are fed into the heat treatment chamber, where they are used as fuel. The vacuum in the pyrolysis chamber is maintained by the flow rate of the spraying agent of the ejecting gas-liquid jet. At the same time, the flow rate of the spraying agent is functionally associated with a vacuum in the pyrolysis chamber.

Blowing air for the afterburning of the pyrolysis gases is supplied to the heat treatment chamber in an amount proportional to the flow rate of the spraying agent of the ejecting gas-liquid jet.

Example. The chemical production waste, which is wastewater containing up to 0.5% of solid impurities with a particle size of up to 20 mm in an amount of 1136 kg / h, paste-like waste, which is a bottoms residue with a particle size of 0.1 -1, is neutralized 0 mm and the amount of 166.7 kg / h, and solid waste, which is a mineralized residue with osmols, containing 9.5% of combustible substances and having a heat of combustion of 700 kcal / kg in the amount of 167 kg / h. Solid impurities with an equivalent diameter of more than 250 microns are separated from the wastewater. Solids with a moisture content of up to 60% are combined with pasty waste, and the suspension is prepared by wet grinding (total moisture 70-80%) and then diluted with waste water to an acid content of 6 ° W and classification by solid particles less than 250 microns. Solid residue with a particle size of more than 250 microns is returned to the wet grinding. The resulting suspension is fed into the cyclone reactor through 2 pneumatic nozzles. Wastewater is sprayed in a cyclone reactor by radially mechanical nozzles. To maintain the required temperature (1000 ° C)

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Additional heat is burned in the heat treatment chamber. Combustion air is fed into the cyclone reactor tangentially, which ensures the twisting of the gas stream. The solid waste is decomposed by heating with high temperature flue gases leaving the cyclone reactor under conditions that prevent the flue gases from contacting the solid waste. The gaseous pyrolysis products of solid waste are transported to the cyclone reactor due to the ejection of a gas-liquid jet of the sprayed suspension, by regulating the flow of compressed air, the vacuum in the pyrolysis chamber of solid waste is maintained at 5 kg / m. The consumption of compressed air for spraying the suspension through one of the nozzles is equal to 70, and through the other nozzle forming the ejecting gas-liquid jet, compressed air is supplied in an amount of 30-70.

The blast air for the afterburning of the pyrolysis gases is fed into the cyclone reactor in an amount proportional to the flow rate of the compressed air of the ejecting gas-liquid jet and equal to 120-280.

Combustion products are characterized by the presence of carbon monoxide (CO) less than 0.05% by volume.

The supply of pyrolysis products to the heat treatment chamber using a gas-liquid jet of sprayed liquid waste improves the efficiency of the process by stabilizing the flow of blast air and the mode of burning liquid waste and thereby reducing the associated level of environmental pollution.

Maintaining the vacuum in the pyrolysis chamber with the flow rate of the spraying agent of the ejecting gas-liquid jet, which is functionally related to the vacuum in the pyrolysis chamber, reduces the loss of the compressed gas during a period when the volume of gases released during pyrolysis is small, i.e. at the beginning and end of the cycle loading solid waste into the pyrolysis chamber. At the same time, the functional relationship between the flow rate of the spraying agent and the vacuum in the pyrolysis chamber allows for improved working conditions, since the vacuum in the pyrolysis chamber is maintained optimal both during the pyrolysis period and during the waste loading period.

The supply of blast air for the afterburning of pyrolysis gases in an amount proportional to the flow rate of the spraying agent with low inertia ensures the regulation of optimal excess air in the heat treatment chamber and, as a result, high sanitary and hygienic indicators of the process of thermal waste disposal.

The waste is burned by a known method without taking into account the irregularity of the pyrolysis products, which is associated with the frequency of the pyrolysis process and

waste loading, which leads to gas release to the service area during the period of maximum release of pyrolysis products and air suction into the pyrolysis chamber during the period of their minimum release;

When solid waste is loaded, the supply of the proposed invention permits Yuduktov pyrolysis into the heat treatment chamber

improve working conditions by maintaining-using gas-liquid

Neither the optimal dilution in the period of dispersed liquid waste, rastipyrolysis, or during the loading period, the flow in the pyrolysis chamber is maintained

Dov. In addition, the use of the invention by the flow rate of the spraying agent ejects the ability to burn various gas-liquid jets that are different in aggregate, and into the chamber

In this state, with stable heat treatment, blown air is supplied for

the byteka of the blast air, which is beneficial for the amount of pyrolysis gases in the amount of

but influences the mode of their combustion and is proportional to the consumption of the sprayed

Mym increases the effectiveness of the fire bez-agent.

waste incineration and reduce environmental pollution.

Claims (1)

Invention Formula The method of fire disposal of waste of various aggregates according to ed. St. No. 800493, characterized in that, in order to increase the efficiency of the process and improve the working conditions during cycling