Rational use of energy in pulp and paper industry using cogeneration | |
| Author | Jain, Dileep Kumar |
| Call Number | AIT Thesis no. ET-88-1 |
| Subject(s) | Pulp mills--Power supply Cogeneration of electric power and heat |
| Note | A thesis submitted in partial fulfillment. of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Due to sharp rise ln energy prices a nd stricter environmental control regulations , some new efficient processes o f paper manufacturing have been developed in the recent past. These processes namely, pre-concentration of black liquor by mechanical vapour recompression (MVR, a h eat pump ), ozone u se for bleaching and waste water treatment , membrane processes for fibre recovery and water recycling , and methanisation of effluents offer opportunities for saving in chemicals , energy recovery and pollution abatement in pulp and paper industries. Their economic attractiveness largely depends on reliable and cheap source of electricity; their input energy requirement. Cogeneration, an efficient and reliable energy supply techno logy , could be considered in association with new processes. With this need, two studies, one in an Indian pulp and paper mill and the other in a Thai pulp company were carried out to evaluate achievable cogeneration potential and application potential of new processes with focus on rational use of energy. It has been found that Indian Kraft paper industries could economically generate 20-40% more electricity than their present demand by using coal boiler/steam turbine cogeneration system. Pre-concentration of black liquor by MVR s h owed a simple payback period of 2 year against project life o f more than 10 years. Similar results have been obtained for Thai pulp company also. Thus a judicious exploitations of cogeneration can easily meet the energy demand of new processes permitting optimal use of resources both of energy supply and paper manufacturing. I t should however be mentioned that technical and economic advantages , achievable by use of ozone, membrane processes and mechanization, need to be fully demonstrated under existing raw materials , pulping processes and current state of technological developments. |
| Year | 1988 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Mora, Jean-Claude |
| Examination Committee(s) | Bhattacharya, Sribas C. ;Prida Wibulswas |
| Scholarship Donor(s) | The Royal Netherlands Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |