DE2600578A1 - Reactivation of satd. active carbon - by heating with mineral oil waste products in absence of oxygen - Google Patents

Abstract

Improvement and reactivation of satd. active carbon is by heating with used oil, tar, tar oils, mineral oil sludge, drilling oil, polymer sludge, mineral greases or other combustible mineral oil waste products, with exclusion of oxygen. Method is used in water purification and effluent treatment plants to remove impurities by adsorption and filleration. Cost of regeneration is reduced, the hesat required being generated within the process, and further active carbon is produced by carbonisation of the organic impurities. The waste oils, etc, are disposed of without causing pollution.

Description

PROCEDURE

for remuneration and reactivation of saturated active carbon Active carbon are becoming more and more important in industrial applications. To their use To make it economical, ongoing reactivation is required. This is done usually by backwashing or by thermal treatment. The thermal Regeneration is necessary, among other things, when organic on active coals Substance was deposited and coarse material was also absorbed.

The thermal decomposition of absorbed loads causes one Loss of substance in the amount of approx. 5% of the basic coal substance.

In addition, the fine dust fraction is reduced by the thermal treatment of the carbon granulate is considerably enlarged by abrasion, which leads to further losses and sometimes additional work processes become necessary (granulation).

The profitability of using activated carbon as a filter medium is finally still burdened by the fact that higher for thermal reactivation Heat demand arises.

The activation is completely independent of the facts described Concerning saturated activated carbons, causes the disposal of hazardous waste, yes toxic waste "substances such as waste oil, tar oil, tar, mineral oil sludge, Drilling oils, polymer slurries, etc., including flammable substances dissolved in water, significant problems and high costs.

The latter facts are in connection with this invention relevant, since the invention also includes hazardous waste and general waste BeeRiti problems can be solved.

The present invention not only solves a whole grater problematic Tasks of the described P complex, but also opens up business ichkeitst'orte i le and raw material and energy advantages that use of the previously too expensive, i.e. uneconomical filter medium "Active Coals" for water pollution control and wastewater treatment.

The method according to the invention is not only economical, it also gains ecological importance by a) making an important contribution to water pollution control and wastewater treatment is performed and b) waste materials in multiple ways used and disposed of in an environmentally friendly manner, c) raw material (crude oil) savings and d) energy is obtained.

Description: Used in sewage treatment plants for water filtration Activated charcoal is saturated by the adsorbtive accumulation of pollutants and by mechanical filtering out of coarse and suspended matter.

In order to make the coal usable again, it has to be reactivated.

The reactivation causes the carbon surface to be freed from accumulated especially organic pollutants. The reactivation must be like this be carried out that the coal is hard, that is, resistant and a suitable one Has grain.

According to the invention, the A reactivation takes place by heating the saturated Activated carbon together with tar waste, waste oil, tar oil, mineral oil sludge, polymer sludge, Drilling oils and other greases or oils.

The pollutants are degassed at the same time, if they are organic the added substances are used beneficially: they are also gasified and have an effect thereby hardening the activated carbon, while its entire gas volume is used for heating purposes can be used in the system and beyond for energy generation. From the according to the invention Degassing of the organic pollutants, deposited on the carbon during the filter insert A usable fuel gas is also produced, which is used as described above can be.

By degassing the oärganic substances deposited on the carbon in the filter Charcoal is also produced, which contributes to the cause of the cause To maintain volume to be reactivated saturated activated carbon.

The simultaneous gassing of polluting waste such as Tar oils, used oil, mineral oil sludge etc. also make them environmentally friendly Elimination, their economic utilization, excess energy during reactivation of saturated activated carbon.

The reactivation is carried out according to the invention in such a way that a £ Coal-mineral oil-tar oil mixture is produced, which in a closed Body is heated in the absence of oxygen.

The heating takes place in such a way that after the reaction vessel has been heated up the resulting gas is fed to a burner, which creates a gas-air mixture, which is then burned and the heating - Å A ß A S of Reaction container is used from the outside.

In contrast to known methods of regeneration, where by oxidation an activation is brought about, so where for example with superheated steam and pressure is worked, the present invention is a pure one Degassing process with exclusion of oxygen from air, i.e. pure thermal decomposition organic pollutants.

Claims (2)

Claims: 1. Process for remuneration and reactivation of saturated Activated carbons, indicating that one is saturated active carbons together with waste oil, tar, tar oils, mineral oil sludge, drilling oil, polymer sludge, Mineral fats and - or other combustible mineral oil wastes in the absence of oxygen heated and degassed. 2. Process for the remuneration and reactivation of saturated activated carbons, according to claim 1, that it is possible to do this when heating the mixture according to claim. 1 resulting gas for heating the reaction space or Reaction container used from the outside.