Patent ID: 11866345
Assignee: TONGJI UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 5:
6. A continuous production method of the polyferric chloride, using the continuous production device according to claim 1, wherein the continuous production method comprises the following steps:
(1) adding waste hydrochloric acid, ferric chloride and sodium nitrite into the first mixing pipeline, stirring and mixing to obtain a mixed liquid; using the reflux pump to extract a first partial liquid of the mixed liquid from the first mixing pipeline and then transport the first partial liquid to the atomizer on a top of the first mixing pipeline, driving the atomizer by a pressure of the reflux pump or a drive motor to atomize the first partial liquid; during a first atomization process, continuously supplying oxygen for performing a preliminary reaction on the first partial liquid to obtain a preliminary reacted liquid; at the same time of the first atomization process and the preliminary reaction of the first partial liquid, passing the preliminary reacted liquid into the second reaction pipeline;
(2) after the preliminary reacted liquid flows into the second reaction pipeline, using the reflux pump to extract a second partial liquid of the preliminary reacted liquid from the second reaction pipeline and then transport the second partial liquid to the atomizer on a top of the second reaction pipeline, driving the atomizer by the pressure of the reflux pump or the drive motor to atomize the second partial liquid; during a second atomization process, continuously supplying the oxygen and adding the sodium nitrite for performing a first catalytic oxidation reaction on the second partial liquid to obtain an oxidized mixed liquid; at the same time of the second atomization process and the first catalytic oxidation reaction of the second partial liquid, passing the oxidized mixed liquid into the third reaction pipeline;
(3) after the oxidized mixed liquid flows into the third reaction pipeline, using the reflux pump to extract a third partial liquid of the oxidized mixed liquid from the third reaction pipeline and then transport the third partial liquid to the atomizer on the top of the third reaction pipeline, driving the atomizer by the pressure of the reflux pump or the drive motor to atomize the third partial liquid; during a third atomization process, continuously supplying the oxygen and adding the polymerizing agent for performing a second catalytic oxidation reaction and a polymerization reaction on the third partial liquid to obtain a polymerized mixed liquid; at the same time of the third atomization process, passing the polymerized mixed liquid into the concentration device for a concentration of the polymerized mixed liquid; and
(4) passing the polymerized mixed liquid into the concentration device for the concentration of the polymerized mixed liquid to obtain the polyferric chloride liquid; collecting steam generated during the concentration of the polymerized mixed liquid, and pre-heating the first mixing pipeline; after the concentration of the polymerized mixed liquid, the polyferric chloride liquid is obtained; when a solid polyferric chloride is needed, concentrating the polyferric chloride liquid to a predetermined concentration to obtain a concentrated polyferric chloride liquid, and then natural cooling the concentrated polyferric chloride liquid under a sealed condition and room temperature to obtain the solid polyferric chloride with a block shape.