The utility model discloses a polyaluminum
ferric chloride liquid adding and
backwashing system, which comprises a
medicine inlet pipeline, a washing pipeline and a water drainage pipeline, the
medicine inlet pipeline (1) comprises a
medicine inlet
pipe, a medicine
storage tank and a medicine adding pipeline, the medicine inlet
pipe is connected with a main medicine
storage tank and a standby medicine
storage tank, and the washing pipeline is connected with the medicine adding pipeline; the water inlet end of the chemical adding pipeline is connected with the main
chemical storage tank and the standby
chemical storage tank, and the water outlet end of the chemical adding pipeline is connected to the
source water pipe; (2) a flushing pipeline which is mainly a high-pressure
backwashing pipe, a
water supply pipe inputs high-pressure water which just leaves a factory as flushing water to the high-pressure
backwashing pipe and the
chemical storage tank, and the high-pressure backwashing pipe is communicated with the chemical adding pipeline, so that the flushing water is backflushed into the chemical adding pipeline; one end of the drainage pipeline is connected with the chemical storage tank and the chemical adding pipeline, and the other end of the drainage pipeline is connected with a drainage
sewage pipe network. The utility model provides a polyaluminum
ferric chloride liquid adding and backwashing
system, which can be used for respectively washing a medicine storage tank and each section of medicine adding pipeline while adding medicine without stopping a pump, preventing the pipeline from being blocked, reducing the fault, not influencing the production, and reducing the production cost. Meanwhile, the operation intensity of maintenance personnel is relieved, and the working efficiency is improved.