Two options for emergency shutdown of the restoration workshop in polysilicon production

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There are two situations for emergency shutdown of the reduction workshop in polysilicon production:: A, A Hydrogen stop 1 The sight glass of the peephole of the reduction furnace and hydrogenation furnace is broken 2 The flange on the furnace body leaks 3 Cooling water enters the furnace body 4 The furnace body cooling water and electrode cooling water suddenly have no flow 5 The DCS of a certain equipment fails 6 Arcing occurs, and the material leaks out 7 The whole plant has a power outage 8 CDI failure cannot provide H2 In this case, the shutdown operation process: Power off → cut off SiHCl3 and H2 → close the valve to CDI → open VG1 → open N2 replacement B Hydrogen needs to be stopped 1. Invert the silicon rod 2. The temperature of the furnace cooling water and electrode cooling water is very high, but the cause cannot be found in time 3. Arcing, no material leakage 4. Insufficient SiHCl3 supply. In this case, the shutdown operation process: Turn off the power → cut off SiHCl3 → reduce the H2 flow to reduce the temperature of the silicon rod to 500°C → close the valve to CDI → open the VG1 valve → cut off H2 - → turn on N2 replacement