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Preparation method of polymerization chlorination zinc iron sulfate flocculating agent

A technology of chlorinated zinc sulfate and flocculant, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the problems of unexplained preparation method, conversion rate, stability and flocculation effect, etc. Large, fast settling effect

Active Publication Date: 2014-05-07
深圳市佳耀生态环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual production process, it is found that for different inorganic acids, oxidants and stabilizers, different dosages and dosage methods will affect Fe( ) conversion rate, stability, and flocculation effect have a great impact, but the patent does not specify the specific preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of polychlorozinc-iron sulfate flocculant comprises the following steps:

[0028] 1) Weigh 63g of ferrous sulfate heptahydrate and place it in a beaker, then add 49ml of industrial hydrochloric acid (1+1), stir at 60°C at a speed of 60r / min for acidification and dissolve completely;

[0029] 2) Weigh 3.55g NaClO 3 Dissolve the solid in 5ml water to prepare NaClO 3 aqueous solution, and add the configured NaClO in step 1) at a rate of 1ml / min 3 Aqueous solution, continue to stir for 10 minutes to complete the chlorination;

[0030] 3) According to the Zn / Fe molar ratio of 1:7, slowly add 8.2g of zinc sulfate heptahydrate in step 2), stir to dissolve and polymerize for 20 minutes to obtain polymerized zinc iron sulfate chloride liquid, and continue to stir;

[0031] 4) Add slow polysilicic acid solution in step 3), stir and mix evenly at 60°C, then add NaHCO with a degree of alkalinity of 0.3 under stirring conditions 3 Solid 5.1g; of which NaHCO ...

Embodiment 2

[0037] A kind of preparation method of polychlorozinc-iron sulfate flocculant is characterized in that, comprises the following steps:

[0038]1) Weigh 63g of ferrous sulfate heptahydrate and place it in a beaker, then add 49ml of industrial hydrochloric acid (concentrated hydrochloric acid is diluted by 1+1), stir at 70°C at a speed of 60r / min for acidification and dissolution;

[0039] 2) Weigh 3.55g NaClO 3 The solid was dissolved in 5ml of water, and NaClO was added at a speed of 1ml / min 3 Add the aqueous solution to the reaction solution in step 1), and continue to stir for 10 minutes to complete the chlorination;

[0040] 3) According to the Zn / Fe molar ratio of 1:6, slowly add 9.69g of zinc sulfate heptahydrate in step 2), stir to dissolve and polymerize for 20 minutes to obtain polymerized zinc iron sulfate chloride liquid, and continue to stir;

[0041] 4) Add slow polysilicic acid solution in step 3), stir and mix evenly in a water bath at 70°C, and then add NaHCO ...

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Abstract

The invention discloses a polymerization chlorination zinc iron sulfate flocculating agent. The polymerization chlorination zinc iron sulfate flocculating agent is prepared from ferrous sulfate septihydrate, technical hydrochloric acid, water glass and zinc sulfate used as main raw materials and is low in cost, high in sedimentation speed and good in effect. Fe is oxidized by using sodium chlorate in a hydrochloric acid environment through accurate metering and design of a dosing method of an oxidizing agent. A preparation technology is simple, and the unit preparation cost of the flocculating agent is lower than that of a commercially available product. The content of an active ingredient, namely the full iron in the flocculating agent is relatively high; the flocculating agent does not contain potential harmful elements; and a beneficial element zinc is used as a complex, and polysilicic acid serving as a stabilizing agent and a coagulant agent participates in a preparation and flocculation reaction process. Experiments prove that the flocculating agent can be used for effectively treating feedwater and wastewater and has a very strong removal effect on turbidity, chemical oxygen demand (COD), total phosphorous (TP), total nitrogen (TN) and algae and chlorophyll a in alga wastewater.

Description

technical field [0001] The invention relates to the technical field of preparation of water treatment agents, in particular to a polymerized zinc-iron chloride sulfate flocculant and a preparation method thereof. Background technique [0002] Flocculation and sedimentation are widely used as a low-cost water treatment method. The flocculation process is one of the most widely used and most common unit operations in many water treatment processes at home and abroad, and is one of the key links in the process of water supply and wastewater treatment. The quality of the flocculation effect often determines the operation status of the subsequent process, the final effluent water quality and cost, and the choice of flocculant has important technical and economic value for improving the effluent water quality and reducing the cost of water production. [0003] At present, there are many types of water purifiers used, among which inorganic flocculants play a leading role in the us...

Claims

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Application Information

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IPC IPC(8): C02F1/52
Inventor 郑怀礼陈伟薛文文杨青青孙永军李风亭周于皓范伟唐晓旻
Owner 深圳市佳耀生态环保科技有限公司
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