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Waterbased cleaning of mixing vessels

8. Cost Comparison between Water– and Solvent-based Cleaning

For a water-based cleaning plant, depending on its design, the procurement costs may be higher than for a solvent-based plant of equivalent capacity. But if all operating costs are taken into consideration, for example explosion protection, fume treatment, disposal of spent solvent etc., then the total costs for water-based cleaning are comparable. However, use of comparatively expensive special cleaning agents will lead to increased operating costs.

There follows, by way of example, a tabulated comparison of the specific costs as well as of the operating and capital costs for water- and solvent-based cleaning. These examples are taken from the practical experience of Renzmann, and are accordingly customer specific. Precise figures for capital and operating costs can only be determined when the prevailing constraints and conditions are known.

The capital costs stated in this project are based on costs in Germany and are converted from DM to DKK with a conversion rate of 4. Differences in the size of taxes etc. are not included.

8.1 Costs for water-based and alternative cleaning agents

The cost example is based on a cleaning system "SKM", manufactured by Renzmann. Further description of this plant can be seen in section 6.3.

Table 8.1
Assumptions for cost comparison in Table 8.2 and Table 8.4. Further assumptions and explanations can be seen in Table 8.3 and Table 8.5.

Table 8.2 Look here!
Cost comparison between solvent- and water-based cleaning agents for type SKM washing equipment. 20 washing operations per day.

Table 8.3
Assumptions/explanations.

Table 8.4 Look here
Cost comparison between solvent- and water-based cleaning agents for type SKM washing equipment. 10 washing operations per day

Table 8.5
Assumptions/explanations.

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