Pulp - MoRe and Eurocon in cooperation to offer customized analysis, studies and design of system for collection of DNCG.

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Eurocon and MoRe Research in cooperation offer analysis, mapping and system design for collection and destruction of pulp mills’ diluted non-condensable gases. For pulp mills this means a complete and simplified project process.

The need for a cost efficient way of collection and destruction of diluted non-condensable gases, DNCG, has increased due to tougher EU demands forcing the industry to use best available technology, BAT. According to EU directive 2010/75/EU, the requirements of the BAT conclusions must be met by 30 September 2018. All pulp mills must identify and quantify the emissions of DNCG and report how the requirements are followed or the plan how to follow them. 

“What we usually call weak odorous gases are diluted total reduced sulphur gases containing a mixture of different sulphurous substances such as hydrogen sulphide, methylmercaptan, dimethylsulphide (DMS) and dimethyldisulphide (DMDS),” says Michael Sjögren, Project Engineer, MoRe Research. “The pulp mills can reduce the emission of malodorous gases by collecting the different emissions, e.g. at the recovery boiler, for combustion. However, in order to be able to dimension a plant for this, the size and composition of the gas streams must be determined and mapped.”

“These diluted non-condensable gases, DNCG are released from for example tanks, washing filters, chip bins, lime mud filters or drying machines. Together with Eurocon we have therefore developed flow measurement methods as well as analyses of sulphur content in the pulp mills’ DNCG. Based on the analysis results Eurocon dimensions, designs and constructs a technical solution for an efficient gas collection for immediate destruction.”

“We have more than fifty years of collective experience within the non-condensable gases area, NCG,” says Lars-Eric Myrman, Manager Process, Eurocon. “This includes concentrated non-condensable gases, CNCG as well as diluted non-condensable gases, DNCG. The pipe construction for these aggressive gases differs considerably from traditional pipe construction. In the case of NCG the gases are moist, poisonous and explosive which puts demands on special competence regarding construction of pipeing for gas collecting systems.”

“It is unique that a complete concept for analysis and design of a technical solution is offered. Without a reliable set of analysis data an efficient system cannot be designed and now we can together offer a complete package. This is possible due to close cooperation between Eurocon and MoRe,” Lars-Eric Myrman concludes.

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