Reaction kettle discharge system

The invention provides a reaction kettle discharge system. The reaction kettle discharge system comprises a reaction kettle body, a discharge pipe, a connecting pipe, a joint component and a hot air heating component. The fluid inlet end of the discharge pipe is communicated with a bottom discharge outlet of the reaction kettle body; a filtration device is arranged in the discharge pipe; a branchpipe connected to the discharge pipe is located on one side, facing a fluid inlet, of the filtration device, and is provided with an openable pipe cover; the connecting pipe is aligned with the fluidoutlet end of the discharge pipe; the joint component is hermetically connected with the discharge pipe and the connecting pipe; the hot air heating component comprises an outer pipe and a hot air pipeline, the outer pipe sleeves a region, close to the discharge outlet, of the discharge pipe, an airtight air separation layer is arranged between the outer pipe and the discharge pipe, and the hot air pipeline is used for inp