The following are the processes involved in the Chemical industry that require heat energy to generate steam and hot air where we can use concentrated solar power technologies for meeting demand of heat energy:
- Endothermic chemical reaction
- Distillation, evaporation and drying
- Cooling and refrigeration
- Effluent treatment
The Chemical Industry includes basic chemicals and its products, petrochemicals, paints and varnishes, gases, fertilizers and alcohol. It is one of the most diversified of all industrial sectors covering thousands of commercial products. It plays an important role in overall development of Indian economy. It provides chemicals to various other industries such as paper, paint and textiles. The huge agricultural sector also depends heavily on the chemical industry through fertilizers. The chemical manufacturing process is quite complex due to wide variety of outputs having different properties. The typical energy intensive processes in the chemical plant are distillation, evaporation, packaging, centrifuging and drying. Heat is required in almost all forms such as low and high pressure steam, hot water and hot air. In addition, there is large demand for refrigeration and air conditioning, for process and storage requirements of some chemicals. The solar assisted vapor absorption system is perfectly suitable for the air conditioning loads in the plant. The generic process flow diagram is not possible for the chemical industry due to wide range of the products and different manufacturing processes required for these products.
The typical processes in the chemical industry are depicted in the following figure.