A continuous production device for ferric sulfate and polyferric sulfate solid products and its production process

Abstract

The invention discloses a ferric sulfate and polymerized ferric sulfate solid product continuous production device, which comprises a second dryer, a first dryer, a mixing tank and a reaction kettle.One side of the mixing tank is provided with a water inlet pipeline, a sulfuric acid inlet pipe is arranged on the other side of the mixing tank, and a ferrous sulfate pipeline is arranged in the middle of the mixing tank. Ferric sulfate heating, drying and polymerization are realized through conduction oil in an internal jacket of the first dryer, a double screw stirrer performs opposite mixing in a heating process to enable continuous evaporation of moisture in liquid, and high heat efficiency, low energy consumption and short drying time are realized. Solid materials can be cooled by cooling water in the second dryer, and cooled solids directly enter an automatic packaging procedure, so that a full-automatic production process from drying to packaging is completely realized, and production efficiency is remarkably improved. In addition, the production device is simple in structure, occupied area and space are sharply saved, and investment is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a continuous production device for ferric sulfate and polyferric sulfate solid products and a production process thereof. Background technique [0002] Flocculants are divided into two categories: inorganic and organic. Organic flocculants can only be used for the treatment of industrial water and industrial wastewater. Commonly used inorganic flocculants are low-molecular aluminum sulfate, ferrous sulfate, iron trioxide, etc. and polymeric flocculants. Polyaluminum chloride (PAC), polyferric sulfate, etc.; due to the large dosage of low-molecular flocculants, accompanied by the phenomenon of iron and aluminum ions moving backward, which affects water quality and high treatment costs, they are being phased out; Aluminum chloride, although its water purification effect is twice as high as that of low molecular flocculants, but there is a water phase transfer ...

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Problems solved by technology

[0002] Flocculants are divided into two categories: inorganic and organic. Organic flocculants can only be used for the treatment of industrial water and industrial wastewater. Commonly used inorganic flocculants are low-molecular aluminum sulfate, ferrous sulfate, iron trioxide, etc. and polymeric flocculants. Polyaluminum chloride (PAC), polyferric sulfate, etc.; due to the large dosage of low-molecular flocculants, accompanied by the phenomenon of iron and aluminum ions moving backward, which affects water quality and high treatment costs, they are being phased out; Aluminum chloride, although its water purification effect is twice as high as that of low molecular flocculants, but there is a water phase transfer of chloride ions, which is harmful to people's health, so PAC has been downgraded to a water treatment agent; for this reason, it is used as a new high-efficiency purification agent The polyferric sulfate of the dewatering agent has received general attention. Since the production of polyferric sulfate, liquid polyferric sulfate (PFS) has always been the main method, and the production method of solid polyferric sulfate (SPFS) has not been mature.

[0003] There are following problems in the connection production device of ferric sulfate and polymerized ferric sulfate solid products in the prior art: at present, the production of ferric sulfate and polymerized ferric sulfate solid products mostly adopts spray drying, and a large amount of steam will be generated during the drying process, and the investment of steam equipment is large, and the production High cost and huge waste of energy

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