SPICON 2012 MECHANICAL (31st May-2nd June 2012) International Conference on Recent Advances in Engineering, Technology and Management Department of Mechanical Engineering, Sardar Patel College of Engineering, Mumbai HEAT INTEGRATION STUDY OF A PHOSPHORUS TRICHLORIDE (PCl3) PLANT Y.P.Bhalerao 1 , S.J. Kulkarni 2 , Amey S. Wagh 3 , S.V. patil 4 1,2 Assistant Professor, Department of chemical Engineering, Datta Meghe College of Engineering, Airoli, Navi Mumbai, 400708, Maharashtra, India. ypb199 @ yahoo.co.in, sunil_kulkarni2004@indiatimes.com 3 Assistant Professor, Department of Mechanical Engineering,Sabu Siddiki College of Engineering,Bhaikula,Mumbai,Maharashtra,India.,amey_s_wagh@yahoo.com 4 Associate Professor & Head,Chemical Engineering Department Gharda Institute of Technology Lavel, Maharashtra- 41570, suhasvinayak72@gmail.com ABSTRACT: This paper presents an energy integration and retrofit case study of an existing PCl3 Plant, using recent advances in Pinch technology. Retrofit designs involve revamping an existing flow scheme to debottleneck the plant to increase capacity, decrease energy consumption, reduce emissions or change the process to introduce a new technology. Unlike a new design that starts with a clean sheet of paper, a Retrofit study starts with an existing, previously optimized process. The objective here is to perform energy integration to reduce use of energy with minimum capital investment. This is accomplished by minimizing the use of utilities and maximizing process-to- process heat transfer between existing hot and cold streams. One important constraint in the Retrofit study is to utilize available heat transfer areas as far as possible. KEYWORDS: Pinch Technology, Problem Table Algorithm (PTA), Phosphorus Trichloride (PCl3) Plant, INTRODUCTION: During the last decades chemical industry has had to face growing competition driven by rapid globalization, rising public concern for the environment, and increasing regulatory efforts of national governments concerning the environment, health, and safety. In response to these conditions and with regard to the capital intensive nature of chemical industry, constant optimization through redesign of existing production plants has emerged as a key strategy. This task is known as retrofitting and is especially carried out on continuous processes for the production of bulk products. While other techniques involve trial and error methods to achieve a better design, pinch technology enables the design engineer to fix targets and then set out to achieve it. Starting point for an energy integration analysis by pinch technology is to calculate the minimum heating and cooling requirements for a heat exchanger network. These calculations can be performed without having to specify a heat exchanger network. Similarly we can calculate the minimum energy requirements without having to specify a network. Then the minimum energy requirements and the minimum number of exchangers provide targets to subsequent design of a heat exchanger network. The basic data required for optimization are the input and output temperatures of the hot and cold streams along with their mass heat capacity values.