SU934160A2 - Method of burning waste water sediments - Google Patents

Description

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The invention relates to methods for treating sludge from municipal and industrial wastewater.

According to the main author. St. No. 812769 discloses a method for incineration of sewage sludge, which induces mechanical dewatering, drying the sludge, grinding it and feeding it into a cyclone furnace for incineration. .

The disadvantages of the known method of incineration of sewage sludge are the lack of possibility of diluting the water into hydrogen and oxygen, their transfer to the ionic state and, consequently, reducing the possibility of intensifying the process of burning precipitation and saving fuel on this process.

The purpose of the invention is to intensify the process of burning sewage sludge and save fuel during the combustion process by increasing the oxidative properties of oxygen.

This goal is achieved by the fact that, according to the sewage sludge incineration method, foam is impacted by oxygen-hydrogen bubbles.

10 by the field of high voltage 20100 kB / cm directly in the combustion process.

The method is carried out as follows.

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Claims (1)

A sludge or sludge to be incinerated with a moisture content of 98.0–99.9% is subjected to electro flotation compaction by hydrogen and oxygen bubbles released on the electro electrofloater electrodes. Particles of dry matter sediment, stuck to the PU-. Gas bubbles are carried to the surface of the sludge in the form of foam with a moisture content of 393–80–98%, pushing through the slots of the hermetic cover of the electrofloatator into the Drain Pipeline, from where it is fed, under pressure, the foam is directed directly into the furnace, for example, cyclone. with a diameter of 0.3-0.5 mm. In a cyclone furnace in a stream of burning fuel-air mixture, with a temperature of 600-1000 ° C, the foam jet is heated, hydrogen-oxygen bubbles explode and burn, breaking up, preventing intense evaporation moisture enveloping particles firmly of substances - the thin film steam. After the cyclone furnace starts operating at a stationary thermal mode, high voltages are applied to the electrodes located in the working volume of the furnace. At the same time, a field strength of 2010С kV / cm is created between the electrodes. As a result of this organization of the combustion process, solid particles of a sludge with a particle size of 500 µm are formed, the intensity of drying of which up to 5-40% of moisture per unit volume increases by 2-4 times. Dried organic particles of the sludge are easily burned. The process of burning the sediments in a cyclone furnace under the influence of a high-voltage electric field leads to the occurrence of intensely occurring ionization processes in the furnace working volume, as a result of which the molecular oxygen is converted to the following modifications: positive oxygen ion O, negative oxygen ion 0, positive ion of diatomic oxygen 0, negative ion of diatomic oxygen. Og, and ozone. In addition, the decomposition of water vapor into hydrogen and oxygen and the ionization processes of the combustible components of the fuel, accompanied by the separation of the electron from the electron shell, occur. The introduction of the process of burning combustible components at the ion level contributes to the acceleration of the combustion reaction, increasing the combustion temperature and, consequently, accelerating the process of burning sewage sludge. Example, non-compacted excess active sludge from secondary clarifiers with a humidity of 99%, is compacted to a humidity of 95%. The resulting compacted foam, oxyhydrogen bubbles, is pushed through the slots of the pressure cap of a flotation device under pressure of 0.1 bar and directed thin jet 0.3 mm thick directly into a cyclone furnace for incineration. A salt that is used as a liquid fuel is also simultaneously fed there. As a result of heating the foam jet to 100 ° C, vaporization from the surface of the jet and rupture of oxygen-hydrogen bubbles is observed. At the same time, solid particles of size-i, about 300 microns, are formed. The impact of a high voltage electric field with a voltage of 25 kV / cm on reactants in a cyclone furnace leads to the synthesis of water vapor and the conversion of the starting components and products of combustion to the ionized state with a concentration of ionized atomic gases, approximately 0.3 mg / l. As a result, the speed of drying processes will increase by 3 times, the temperature in the furnace rises to 1200 s and the consumption of fuel and air decreases, which corresponds to a decrease in energy consumption. atm to 20% compared to the energy consumption of the known process incinerating sewage sludge. Thus, the use of the proposed method will reduce fuel consumption by 15-25% due to maintaining the combustion process in an optimal mode, in particular eliminating the chemical and partial reduction of mechanical underburning, and reduce the dimensions of the combustion devices by 10-15% by reducing the length of the torch , due to the increase in the temperature of the flare by approximately 200250 G, the invention of the invention. A method for burning sewage sludge according to avtsev, no. 812769, about a tl and that, with the chain of intensification of the process of incineration of sewage sludge and oxazolidinone fuel to oxygen-saturated vodo59341606 native bubbles of foam influence. Sources of information the high-voltage electric field is taken into account in the examination of 20–100 kV / cm direct-I voltage. USSR author's certificate but in the process of burning. № 812769, cl. C 02 C 3/10, 1977,