Deep dechlorination system for dimethyldichlorosilane hydrolysate

The deep dechlorination system comprises a hydrolysis device and a degassing device, a gas outlet of the degassing device is connected with an absorption tower through an exhaust pipe, and a liquid outlet of the degassing device is connected with a first-stage washing device, a second-stage washing device and a third-stage washing device through a first liquid discharge pipe. A desalted water inlet pipe is arranged on the third-stage washing device, a liquid outlet of the third-stage washing device is communicated with a liquid inlet of the second-stage washing device through a first return pipe, and a liquid outlet of the second-stage washing device is communicated with a liquid inlet of the absorption tower through a second return pipe; a liquid outlet of the absorption tower is communicated with a liquid inlet of the first-stage washing device through a second liquid discharge pipe, a hydrochloric acid supplementing pipe is arranged on the first washing device, and a liquid outlet of the first-stage washin