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Process Integration and Pinch Analysis

Process integration is an analytical approach that can be applied to optimize the selection or modification of manufacturing steps and of interconnections within the goal of minimizing resource use. Pinch analysis is one of widely used process integration techniques. Pinch analysis uses a systematic approach to identify and correct the performance-limited constraint (or pinch) in any manufacturing environment. The critical innovation in the pinch analysis was the development of "composite curves" for heating and cooling which represent the overall heat energy demand and availability profiles for the process in general. When the two composite curves of heat and cooling are drawn on a temperature-enthylpy graph, they indicate the location of process pinch and the minimum thermodynamic and heating requirements. They are called energy targets.

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Process Integration and Pinch AnalysisCosts & Benefits

Parent Process:
Energy Savings Potential

An estimate shows that the pinch analysis can lead to energy savings of 10 to 35% in the pulp and paper industry. At a company pinch analysis identified 8 projects that could lead to savings. Annual steam savings of 718, 972 MMBtu and annual natural gas s

CO2 Emission Reduction Potential

Payback period corresponding to the savings in steam and natural gas was about 2.75 years. In an other estimate, capital investment of $1.8 million were reported with the payback period of around 1 year.