2 ОРГАНИЗАЦИЯ И МЕТОДИКА РАБОТ - Courrier international

technical liquids.
Initial decontamination of condensers and transformers is carried out by flushing a capacitive
PCB-containing equipment in pairs of methylene chloride up to the required level of security.
According to the system adopted by the developer of technology, technological scheme includes:
collection of transformers (condensers) and placing them in a special place;
preheating of each transformer (condenser), emptying it at the expense of gravity and the
collection of liquid PCB in a separate tank for disposal;
carrying out the cleaning cycle of the transformer (condenser) with vapors of methylene
chloride;
disassembly of the transformer (condenser) and sorting of components. Established that the
cleaning process pairs of methylene chloride metal parts inside the transformer (condenser)
cleaned up to such an extent that they are not considered hazardous waste and can be recycled
without any problems;
details of wood construction, cardboard and paper, which may still contain a residual amount of
PCB, are sent for incineration.
However, in order to maintain ecological safety of the Arctic zone flowsheet washing
transformers (condensers) of PCB disposal technology, complemented by a solvent after the
washing of PCB-containing equipment, which will intensify the work site cleaning of
transformers (condensers) to regenerate the solvent up to environmentally acceptable standards
for impurity content of PCB.
For these purposes, uses technology developed by LLC NIITS "Synthesis." The general
technological scheme for cleaning PCB-containing transformers (condenser) is shown in Figure
11.3.2 and comprises the following steps:
discharge of PCB;
washing equipment with methylene chloride,
regeneration of the solvent.
In the third stage of technology by the direct elimination of collected spent oils and technical
liquids containing sovtol, and other PCB-containing liquids.
The elimination process is solved by the implementation of two ways:
operating mobile plant high-temperature oxidation directly at the site of Alexandra Island;
carrying out chemical processing of the collected waste to transfer them to a lower class of
danger.
Select the direction of the third stage of technology is determined by the concentration of PCBcontaining
liquids. When the concentration of active ingredient of PCB 90% oleum sulfonation
technology is used in excess relative to sovtol oleum, followed by neutralization of the saltforming
agent triethanolamine. Sulfonation process is conducted at a temperature of 100-180 ° C
to yield a result of an organic compound triethanolamine salts of sulfonated sovtol PHDS-T.
11.3.3.1 PCB discharge stage
The first step in the processing of transformers (condensers), containing PCB, is draining
dielectric fluid from them. In the presence of lower discharge valve and the upper vent valve
such an operation seems to drain fairly simple. In fact, this operation is not simple for several
reasons:
FINAL REPORT for Contract No. CS-NPA-Arctic-13/2009 of December 01, 2009 within the framework of pilot project Development
of Technology of clean up of the area of Decommissioned Sites of The Russian Federation Ministry of Defense in the Arctic by the
Example of Alexanra Island of Franz Josef Land Archipelago from Hazardous Waste
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