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Preparation method for solid polymer ferric sulfate flocculating agent

A technology of solid polymerization and ferric sulfate, which is applied in the field of water treatment, can solve the problems of inconvenient storage, packaging and transportation, restrict popularization and use, etc., and achieve the effects of small impact, high turbidity removal rate and high removal rate.

Inactive Publication Date: 2016-07-27
王建国
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AI Technical Summary

Problems solved by technology

However, liquid polyferric sulfate (PFS) flocculant is usually produced, and its popularization is limited due to the inconvenience of storage, packaging and transportation.

Method used

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  • Preparation method for solid polymer ferric sulfate flocculating agent
  • Preparation method for solid polymer ferric sulfate flocculating agent

Examples

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Embodiment

[0019] Example: Set the stirring speed of the six-way electric stirrer and ask in time: 300r / min, stirring for 1min, 150r / min, stirring time for 3min, 40r / min, stirring for 5min, and timing of dosing. Settled for 30 minutes after stirring, took the supernatant, measured the turbidity with a double-beam ultraviolet-visible spectrophotometer, and measured its COD with a HACHDR2800 COD instrument.

[0020] Table 1

[0021]

[0022] The optimal conditions of the platform are found out through the product treatment of raw sewage through the orthogonal test platform. The wastewater was taken from the domestic sewage of a chemical plant in Taiyuan. The water quality is light yellow and has a strong odor. The pH value is 8.1~8.7, and the turbidity is 100~120NTU. COD is 320-430mg / L, total nitrogen is 1.1-1.9mg / L, and total phosphorus is 2.2-2.7mg / L.

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Abstract

The invention provides a preparation method for a solid polymer ferric sulfate flocculating agent. The method is characterized by comprising the following steps: (1) weighing a certain amount of FeSO4.7H2O, putting the weighed FeSO4.7H2O in a container, adding distilled water in proportion and slowly adding concentrated H2SO4 drop by drop for acidifying; (2) stirring liquid in the container at a certain water-bath temperature and stirring speed; (3) adding a catalytic oxidizing agent, continuing stirring for 5 to 15 min, then adding diatomite and carrying out a reaction for 10 to 30 min; and (4) putting a reaction product in a vacuum drying box for drying, grinding the dried product so as to obtain a yellowiest powdery product and putting the yellowiest powdery product in a packaging bag for curing and preservation. The polymer ferric sulfate (PFS) flocculating agent provided by the invention has flocculation performance obviously better than flocculation performance of liquid PFS. Experimental results show that the PFS flocculating agent loaded with diatomite has the advantages of high deturbidity rate, high COD and total phosphor removal rate, small influence on the pH value of a water body, etc.

Description

technical field [0001] The invention belongs to the field of water treatment, in particular to a preparation method of a solid polyferric sulfate flocculant used for water treatment. Background technique [0002] Flocculation is one of the most important water pollution control methods. Iron-based inorganic polymer flocculant is one of the effective flocculants with good development and application prospects, and can be used in various industrial wastewater, domestic sewage and drinking water treatment processes. Compared with traditional inorganic flocculants, it has the advantages of large alum flowers, dense flocs, fast sedimentation, wide range of applicable pH values, less consumption, good effect, non-toxic, and cheap price, and has been favored by the water treatment industry. of favor. However, liquid polyferric sulfate (PFS) flocculant is usually produced, and its popularization is limited due to the inconvenience of storage, packaging and transportation. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
Inventor 王建国
Owner 王建国
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