Renovation to the desulphurisation equipment in Unipetrol to complete soon
As early as July 2017 TENZA, a.s., signed a contract for the preparation, delivery, installation, and services connected with the renovation and modification to the existing desulphurisation of the K13 through K20 boilers on the premises of the refinery in Litvínov. Simultaneous desulphurisation was selected consisting in controlled injection of dry powder sorbent into the existing semi-dry desulphurisation absorber. The purpose was to decrease SO2 emissions below 130 mg/Nm3, an emission limit in force from 2020. The project also included the construction of a new sorbent storage silo having a storage capacity of 800 m3, installation of two new compressors and two independent lines ensuring controlled sorbent injection, replacement of output breakers and extension of the existing control system.
The implementation of the project started in May 2018 by relocations of energy and media connections, followed by construction work on new buildings, upgrades of existing equipment and technology, deliveries and installations of new machinery in new and existing desulphurisation buildings. Installation and assembly work including all checks, tests, and inspections was completed at the end of May 2019, individual checks and comprehensive tests fourteen days later. Tests of machinery and setting of the machinery have been conducted since mid-June when pilot operation started. Also the setting of the existing equipment control system and control sequences of the new equipment have been finalized. The work has been going on under full and due operation of the source.
At present we are busy with preparations of the renovated desulphurisation for 24/7 operation and guarantee tests. The preparations require successful completion of many partial tests, their evaluation, adjustment of control algorithms of simultaneous desulphurisation processes, especially finding the correct proportion when injecting sorbents when using dry and the existing semi-dry technology for all operating conditions of the power source.