SU927108A3 - Method for processing wastes - Google Patents

Description

I

This invention relates to methods for treating wastewater, in particular helmets, precipitated from wastewater in pulping processes and other combustible materials.

It is known a technical solution according to which waste is treated in a fluidized bed, with the particles forming the layer from the flue gases being fed back into the fluidized bed chamber til.

The disadvantage of this method is the cumbersome equipment for condensing moisture from flue gases.

The purpose of the invention is to increase the efficiency of the process.

This goal is achieved in that the treatment of wastewater is carried out in a fluidized bed reactor with the return of solid hot particles from the flue gases to the wastewater in front of the reactor.

The processed material - wastewater - comes in contact with the particles.

separated from the flue gases that have passed the fluidized bed reactor, which is mixed with the material before being introduced into the reactor. 6 Chemical and / or thermal reactions may occur. Useful components can be separated from gases and vapors by treatment with known methods. The psev10 reactor with a fluidized bed operates at an air flow rate through the reactor of 1-10 m / cm. Since the moisture in the processed material evaporates before the combustion process, the temperature

18 is increased and, due to the high heat transfer of the particles of the layered material, the surface of the heat carrier for the steam generator is less. The pressure decreases in a fluidized bed reactor and the required force for blowing becomes less. This method makes it possible to use heat of vaporization for heating purposes.

Claims (1)

⁴⁰ claims Example 2. Processing is applied to the spent solution from the sodium alkaline pulping process with the image _{<5 of} Na _a (X) _a . 1, 24 kg / s of the spent solution with a 45% solids content is fed into the mixer, in which 0.2 kg / s of aluminum hydrate is supported. The spent liquid mixture aluminum is fed into a pre-reactor, to which 5.8 kg / s of sodium aluminate powder from a heated boiler is also added. Oxidation proceeds in A method of processing waste in a fluidized bed reactor with the return of solid hot particles from flue gases, characterized in that, in order to increase the efficiency of the process, hot particles from flue gases are introduced into the waste in front of the reactor.