Polymeric ferric sulfate reaction device

Abstract

A polymeric ferric sulfate reaction device comprises a reaction kettle and a circulating pipeline, wherein an exhaust port, a manhole, a feeding port and a discharging port are formed in a kettle body of the reaction kettle. The polymeric ferric sulfate reaction device comprises a circulating pipe, a circulating pump, a discharging pipe and a catalyst feeding pipe. A porous sieve plate unit and an aeration unit are arranged in the inner cavity of the reaction kettle, the porous sieve plate unit consists of a top layer sieve plate, a bottom layer sieve plate and a filling body, and the aeration unit consists of an air supply pipe and a plurality of aeration discs arranged on the air supply pipe. The polymeric ferric sulfate reaction device has the advantages that the porous sieve plate unit and the aeration unit are added in a traditional reaction kettle, the air-liquid contact area and air-liquid contact time are increased, and the reaction speed and production efficiency are improved. Non-dissolved solid particles involved in reaction are left on the porous sieve plate unit and are effectively prevented from hitting against the wall of the reaction kettle, abrasion is reduced, and the service life of the reaction kettle is prolonged. Preliminary-stage heat supply can be conducted on the circulating pipe through a heat tracing cable, and crystallized ferrous sulfate is effectively prevented from blocking the pipe.

Description

technical field [0001] The invention relates to a reaction device, in particular to a reaction device for producing polyferric sulfate. Background technique [0002] Polyferric sulfate is an efficient sewage treatment agent, and its excellent flocculation effect makes it more and more used in the sewage and sludge industry. At present, there are many methods for producing polyferric sulfate, but the method widely used in industrial production is catalytic oxidation method, that is, ferrous sulfate and sulfuric acid are used as raw materials, and with the help of catalysts, the catalyst is mainly sodium nitrite, and the oxidant oxygen is used Or air oxidizes ferrous sulfate to ferric sulfate, then hydrolyzes and polymerizes to produce polyferric sulfate. [0003] In the preparation mechanism of polyferric sulfate, the main catalytic oxidation is oxygen and nitrogen oxides, which is a typical gas-liquid reaction. Therefore, increasing the gas-liquid contact area or increasing...

AI Technical Summary

Problems solved by technology

In the preparation process of polyferric sulfate, the raw material solid ferrous sulfate is easy to crystallize, especially in winter, when feeding through pipelines, the solution encounters cold pipelines, and it is easy to crystallize and block the pipelines, causing the reaction to slow down, and even lead to React system crashes

In addition, oxygen is fed through the intake pipe, resulting in uneven oxygen flow, resulting in partial reaction of the material, and a small gas-liquid contact area, resulting in low reaction efficiency.

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