Efficient coagulant special for emulsified oil waste water and preparation method of efficient coagulant

A technology of emulsified oil and coagulant, applied in chemical instruments and methods, water treatment of special compounds, water/sewage treatment, etc., can solve the complex production process, low efficiency of emulsified oil wastewater treatment, limited range of applicable oil content, etc. problems, to achieve the effect of simple preparation process, shortening the floating time of flocs, and easy control of the production process

Active Publication Date: 2016-06-08
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a special coagulant for high-efficiency emulsified oil wastewater treatment in order to solve the problems of low efficiency of the existing coagulant for the treatment of emulsified oil wastewater, complex production process, and limited range of applicable oil content. One purpose is to provide the preparation method of above-mentioned coagulant

Method used

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  • Efficient coagulant special for emulsified oil waste water and preparation method of efficient coagulant
  • Efficient coagulant special for emulsified oil waste water and preparation method of efficient coagulant
  • Efficient coagulant special for emulsified oil waste water and preparation method of efficient coagulant

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example 1

[0020] Example 1: Preparation of special coagulant for high-efficiency emulsified oil

[0021] At 20°C, weigh 28 parts of sodium silicate solution (0.5mol / L) and gradually add it to 18 parts of 20% sulfuric acid solution, adjust the pH value of the activated silicic acid to 1.0, stir at 200r / min for 40min, and then Stand for 24 hours and set aside; weigh 20 parts of aluminum sulfate, 18 parts of ferrous sulfate, and 2 parts of sodium chlorate and mix them thoroughly, add 9 parts of 20% sulfuric acid solution, and stir at 20°C at a speed of 200r / min until Completely dissolve; weigh 2 parts of manganese chloride and add to the solution prepared in the previous step, and stir at 200r / min for 40min; slowly add the solution prepared in the previous step to activated silicic acid at a temperature of 20°C at 200r / min Min speed stirring for 60 min; then weighed 3 parts of sodium hydroxide and added to the solution prepared in the previous step at a temperature of 20 ° C at a speed of ...

example 2

[0022] Example 2: Preparation of special coagulant for high-efficiency emulsified oil

[0023] At 25°C, weigh 16 parts of sodium silicate solution (0.5mol / L) and gradually add it to 16 parts of 25% dilute acid solution. When the pH value of the acid reaches 2.0, stir at 300r / min for 30min, then let it stand for 36h for later use; after weighing 37 parts of aluminum sulfate, 8 parts of ferrous sulfate, and 6 parts of sodium chlorate, add 8 parts of dilute acid Place it in the solution at 25°C and stir at 300r / min until completely dissolved; weigh 6 parts of manganese nitrate and add it to the solution prepared in the previous step, and stir at 25°C at 300r / min for 40min ; Slowly add the solution prepared in the previous step to the activated silicic acid and stir at a speed of 300r / min for 50min; then weigh 3 parts of sodium hydroxide and add it to the solution prepared in the previous step and stir at a speed of 300r / min at 25°C 50min; Finally, the prepared coagulant solution...

example 3

[0024] Example 3: Preparation of special coagulant for high-efficiency emulsified oil

[0025] At 40°C, weigh 22 parts of sodium silicate solution (0.3mol / L) and gradually add it to 15 parts of 20% sulfuric acid solution, adjust the pH value of activated silicic acid to 3.0, and stir at 400r / min for 40min. Then it was left to stand for 24 hours for later use; 16 parts of aluminum sulfate, 15 parts of ferrous sulfate, 4 parts of sodium chlorate, and 7 parts of 20% sulfuric acid solution were weighed and stirred at 400 r / min until Completely dissolve; weigh 19 parts of manganese chloride and add to the solution prepared in the previous step, and stir at 400r / min for 20min; slowly add the solution prepared in the previous step to the activated silicic acid at 40°C at 400r / min Stir at a rotating speed for 30 minutes; then weigh 2 parts of sodium hydroxide and add it to the solution prepared in the previous step and stir for 30 minutes at 40°C at a rotating speed of 400r / min; final...

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Abstract

The invention relates to efficient coagulant special for emulsified oil waste water and a preparation method of the efficient coagulant. The efficient coagulant comprises, by weight percentage, 8-18% of ferrous sulfate, 16-37% of aluminum sulfate, 1-6% of sodium chlorate, 2-19% of manganese salt, 20-30% of acid, 16-28% of sodium silicate solution and 1-3% of sodium hydroxide. The preparation method of the efficient coagulant includes: using the sodium silicate and acid as raw materials to prepare activated silicate, and dissolving the aluminum sulfate, ferrous sulfate, manganese salt and the like in the acid to have polymerization reaction with the activated silicate so as to finally produce the efficient coagulant special for emulsified oil waste water. The efficient coagulant used for treating the emulsified oil waste water of different concentration is applicable to the treatment of other waste water, low in use amount and high in oil removing efficiency as compared with like products, stable in treatment effect, simple in preparation process, safe, free of pollution, and the like.

Description

technical field [0001] The invention discloses a high-efficiency emulsified oil wastewater treatment special coagulant and a preparation method thereof, belonging to the technical field of water treatment. Background technique [0002] Emulsified oil wastewater is generally composed of heavy oil and light oil, emulsifier and water. Due to the use of a large amount of surfactants in oily industrial wastewater, an oil-water mixture emulsified oil that is difficult to separate is formed, which increases the difficulty of wastewater treatment. If it is not properly treated and discharged into the natural water body, it will block the gas exchange between the water body and the atmosphere, affect the progress of photosynthesis, and then destroy the ecological balance of the water body and cause serious harm to the environment. [0003] As an efficient chemical pretreatment method, coagulation can effectively remove emulsified oil, suspended solids, COD, turbidity, etc. in oily wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F103/36
CPCC02F1/5236C02F1/5245C02F2103/365C02F2303/22C02F2305/00
Inventor 尤朝阳张路广张攀夏钱华
Owner NANJING UNIV OF TECH
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