Compound and efficient flocculating agent, preparation method and application thereof

A coagulation and chemical technology, applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, natural water treatment, etc. Wide range of use, less dosage of chemicals, good removal effect

Inactive Publication Date: 2018-10-16
华夏碧水环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a compound and efficient coagulation agent and its preparation method, which is used for the advanced treatment of chemical and pharmaceutical wastewater, and solves the problems of poor flocculation effect of existing flocculants and low removal rate of chemical oxygen demand (CODcr), etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of compound efficient coagulation agent, by volume, comprises 47% ferrous sulfate solution, 20% industrial sulfuric acid, 33% aluminum chloride solution, and the mass concentration of described ferrous sulfate solution is 25%, so The mass concentration of described aluminum chloride solution is 8%.

[0020] Its preparation method comprises the following steps:

[0021] (1) Ferrous sulfate is dissolved in water, is made into the solution that mass concentration is the concentration of 25%;

[0022] (2) solid aluminum chloride is dissolved in water, is made into the aluminum chloride solution that mass concentration is 8%;

[0023] (3) get prepared ferrous sulfate and aluminum chloride solution and all add reactor, add industrial sulfuric acid, mix;

[0024] (4) Oxygen is introduced into the reaction kettle, and the mixing reaction time is 3.5 hours. After the solution is cooled, it can be extracted from the reaction kettle.

[0025] The coagulant agent prepared...

Embodiment 2

[0027] A kind of compound efficient coagulation agent, by volume, comprises 45% ferrous sulfate solution, 20% industrial sulfuric acid, 35% aluminum chloride solution, and the mass concentration of described ferrous sulfate solution is 30%, so The mass concentration of described aluminum chloride solution is 5%.

[0028] Its preparation method comprises the following steps:

[0029] (1) Ferrous sulfate is dissolved in water, is made into the solution that mass concentration is the concentration of 30%;

[0030] (2) solid aluminum chloride is dissolved in water, is made into the aluminum chloride solution that mass concentration is 5%;

[0031] (3) get prepared ferrous sulfate and aluminum chloride solution and all add reactor, add industrial sulfuric acid, mix;

[0032] (4) Oxygen is passed into the reaction kettle, and the mixing reaction time is 4 hours. After the solution is cooled, it can be extracted from the reaction kettle.

[0033] The coagulant agent prepared in th...

Embodiment 3

[0035] A kind of compound efficient coagulation agent, by volume, comprises 46% ferrous sulfate solution, 19% industrial sulfuric acid, 35% aluminum chloride solution, and the mass concentration of described ferrous sulfate solution is 28%, so The mass concentration of the aluminum chloride solution is 6%.

[0036] Its preparation method comprises the following steps:

[0037] (1) Ferrous sulfate is dissolved in water, is made into the solution that mass concentration is the concentration of 28%;

[0038] (2) solid aluminum chloride is dissolved in water, is made into the aluminum chloride solution that mass concentration is 6%;

[0039] (3) get prepared ferrous sulfate and aluminum chloride solution and all add reactor, add industrial sulfuric acid, mix;

[0040] (4) Oxygen is passed into the reaction kettle, and the mixing reaction time is 5 hours. After the solution is cooled, it can be extracted from the reaction kettle.

[0041] The coagulant agent prepared in this exa...

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PUM

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Abstract

The invention relates to a compound and efficient flocculating agent. The flocculating agent comprises the following materials in percent by volume: 45 to 47 percent of a ferrous sulfate solution, 18to 20 percent of industrial sulphuric acid, and 33 to 35 percent of an aluminum chloride solution, wherein the mass concentration of the ferrous sulfate solution is 25 to 30 percent; the mass concentration of the aluminum chloride solution is 5 to 8 percent. The flocculating agent is brown yellow to yellow brown, the density is within a range of 1.2 to 1.45g / mL, and the pH of a solution is 2.2 to2.6 after the flocculating agent is diluted for 100 times. The flocculating agent can be applied to a deep treatment unit for pharmaceutical and chemical wastewater subjected to biochemical treatment,has the purpose of removing insoluble COD in wastewater, and has the advantages that the removal effect is good, discharged water is clear, formed alum floc is dense, and the settling velocity is high.

Description

technical field [0001] The invention relates to a compound and high-efficiency coagulation agent and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] With the continuous development of new wastewater treatment technologies and wastewater reuse technologies, coagulants are more and more widely used in wastewater treatment, especially in pharmaceutical and chemical wastewater treatment. Since the reform and opening up, China's economy has developed rapidly. Achievements that have attracted worldwide attention. At present, chemical and pharmaceutical wastewater is still one of the more difficult industrial wastewater to treat. Its wastewater is characterized by high content of ingredients and organic matter, high toxicity, high salt content, especially poor biodegradability, and the discharge of production wastewater is intermittent. type emission. With the development of my country's pharmaceutical industry, che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/34
CPCC02F1/5236C02F2103/343
Inventor 张传兵徐亚慧王慧芳侯亚平徐漫漫张新艳周东博纪宏涛邵建彬廖庆花苏继明王存彦孙振洲崔珊珊侯亚龙关亚坤
Owner 华夏碧水环保科技股份有限公司
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