SYSTEM OF THERMAL RECOVERY RELATING TO THE OPERATION OF A DISSOLVER OF A CHEMICAL RECOVERY BOILER

The disclosed solution relates to recovering thermal energy from the operation of a dissolver of a chemical recovery boiler used in pulp manufacturing. According to the solution， a primary fluid circuit conveys green liquor from the dissolver to an external process such as causticizing and solvent such as weak white liquor back to the dissolver， and from this circuit solvent is diverted into a secondary fluid passageway comprising a heat exchanger which cools the solvent by recovering heat from it and transfers the heat to a heat-consuming process. After heat recovery， solvent may be used for further processes before it is at least partly conveyed back to the dissolver.

本公开的技术方案涉及从制浆生产中所用化学回收锅炉的溶解器的运行过程中回收热能。根据该方案，一次流体回路（primary fluid circuit）将来自溶解器的绿液（green liquor）输送至苛化（causticizing）等外部工序，同时将稀白液（weak white liquor）等溶剂送回溶解器；此外，从该回路中分出溶剂进入搭载换热器（heat exchanger）的二次流体通道，该换热器通过从溶剂中回收热量来冷却溶剂，并将所得热量传递至需热工艺。完成热回收后，溶剂可先用于其他后续工序，再至少部分被送回溶解器。