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Production process of solid composite ferric sulfate polymer

A technology for polymerizing ferric sulfate and a production method, which is applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of high energy consumption of solid products, inconvenient transportation, poor stability of liquid products, etc. The effect of alum flower

Inactive Publication Date: 2007-09-05
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The produced liquid product has poor stability and inconvenient transportation, and the solid product obtained by spray drying has high energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 900kg of sulfuric acid slag, 600kg of water and 800kg of concentrated sulfuric acid with a concentration of 92.5 to 98% into the reactor, heat and stir, the reaction temperature is controlled at 140±5°C, the pressure is 0.4±0.05MPa, and the reaction conditions are maintained. For 3.0 hours, add 160kg of calcium oxide and 10kg of sodium carbonate as additives, react for another 20 minutes, then cool down the system temperature below 80°C; put the reactants into the solidification and drying reaction tank, after 4 hours of drying, crush and pack Obtain solid composite polyferric sulfate. The total iron content in the product is 14%, the basicity is greater than 8-14%, and the appearance of the product is earth red or earth yellow powder or block.

Embodiment 2

[0024] Put 600kg of sulfuric acid slag, 300kg of water and 700kg of concentrated sulfuric acid with a concentration of 92.5 to 98% into the reactor, heat and stir, the reaction temperature is controlled at 120±5°C, the pressure is 0.3±0.05MPa, and the reaction conditions are maintained. For 4.0 hours, add 100kg of sodium carbonate and 40kg of calcium carbonate as additives, react for another 40 minutes, then cool down to lower the system temperature below 80°C; put the material into the solidification and drying reaction tank, after 2 hours of drying, crush and pack to obtain a solid Composite polyferric sulfate. The total iron content in the product is 12%, the basicity is greater than 9-13%, and the appearance of the product is earth red or earth yellow powder or block.

Embodiment 3

[0026] Put 850kg of sulfuric acid slag, 580kg of water and 750kg of concentrated sulfuric acid with a concentration of 92.5 to 98% into the reactor, heat and stir, the reaction temperature is controlled at 130±5°C, the pressure is 0.3±0.05MPa, and the reaction conditions are maintained. After 3.5 hours, add 50kg of aluminum oxide, 20kg of sodium aluminate and 50kg of calcium carbonate as additives, react for another 30 minutes, then cool down to lower the system temperature below 80°C; put the reactants into the solidification and drying reaction tank for 4 to 5 hours After puffing, coagulation and drying, it is crushed and packaged to obtain the product. The total iron content in the product is 14%, the basicity is greater than 8-14%, and the appearance of the product is earth red or earth yellow powder or block.

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PUM

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Abstract

The production process of solid composite ferric sulfate polymer includes the following technological steps: the reaction of sulfuric acid cinder, water and concentrated sulfuric acid in certain weight proportion inside a reactor in temperature 100-150 deg.c and pressure not higher than 0.5 MPa for 3.0-5.0 hr; adding additive in certain amount to react for further 20-60 min; cooling to below 80 deg.c, puffing, solidifying, drying and crushing to obtain the product. The present invention obtain solid ferric sulfate polymer product in a short process, and the product may be used in water treatment for pre-treatment, decolorizing, deodorizing, eliminating COD, heavy metal and algae and in treatment of various kinds of waste water. It has obvious treating effect and fast deposition.

Description

technical field [0001] The invention belongs to the field of inorganic salt chemical industry, and in particular relates to a production method of a novel high-efficiency composite solid water purifying agent. Background technique [0002] On the one hand, the treatment effect of low-molecular inorganic brine treatment agents is not ideal, and it is not as good as high-molecular inorganic brine treatment agents, such as: polymer aluminum series, polymer iron series; on the other hand, the production cost of polymer inorganic brine treatment agents is lower than that of low-molecular Inorganic brine treatment agent. [0003] Polyferric sulfate is an inorganic polymer water treatment agent. Most of the products on the market are liquid products prepared by oxidation or catalytic oxidation with ferrous sulfate as the main raw material, or liquid products are obtained by spray drying and other processes to obtain solid products. The oxidants or cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/52
Inventor 李明玉李善得
Owner JINAN UNIVERSITY
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