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Preparation method of flocculating agent for petroleum refining delayed coking oily sewage treatment

A technology for delayed coking and oily sewage, applied in water/sewage treatment, water treatment parameter control, water/sludge/sewage treatment, etc., can solve the problem of large dosage, many dosing tanks, and long sewage treatment process and other problems, to achieve the effect of less dosage, shortened water treatment process, and reduced equipment

Active Publication Date: 2019-12-24
常州市振邦化工制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some oil refineries use flocculation and demulsification for treatment, but three times of dosing are required, and the dosage is large, and there are many dosing tanks and dosing devices, making the sewage treatment process long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for preparing a flocculant for oil refining delayed coking oily sewage treatment, comprising the following steps:

[0017] S1: 17 mass parts dimethyl diallyl ammonium chloride aqueous solution is mixed with 25 mass parts epichlorohydrin, and logical nitrogen is protected, wherein the mass concentration of dimethyl diallyl ammonium chloride aqueous solution is 60 %;

[0018] S2: Mix 0.5 parts by mass of initiator with 42.5 parts by mass of water to make an initiator mixed solution. Under water bath conditions, control the temperature at 45-55°C, add part of the initiator mixed solution to the reaction system in S1, and mix Stir for 60 minutes, heat up to 75-85°C, add the remaining initiator mixture, mix and stir for 60 minutes, wherein the initiator is a mixture of ammonium persulfate, sodium bisulfite, sodium sulfite and potassium persulfate, and the part of the initiator added first is mixed The mass ratio of the solution to the remaining initiator mixed solu...

Embodiment 2

[0021] A method for preparing a flocculant for oil refining delayed coking oily sewage treatment, comprising the following steps:

[0022] S1: 50 mass parts dimethyl diallyl ammonium chloride aqueous solution is mixed with 20 mass parts epichlorohydrin, and logical nitrogen is protected, wherein the mass concentration of dimethyl diallyl ammonium chloride aqueous solution is 30 %;

[0023] S2: Mix 0.5 parts by mass of initiator with 14.5 parts by mass of water to make an initiator mixed solution. Under water bath conditions, control the temperature at 45-55°C, add part of the initiator mixed solution to the reaction system in S1, and mix Stir for 60 minutes, heat up to 75-85°C, add the remaining initiator mixture, mix and stir for 50 minutes, wherein the initiator is a mixture of ammonium persulfate, sodium bisulfite, sodium sulfite and potassium persulfate, the part of the initiator added first is mixed The mass ratio of the solution to the remaining initiator mixed solution...

Embodiment 3

[0026] A method for preparing a flocculant for oil refining delayed coking oily sewage treatment, comprising the following steps:

[0027] S1: 33.5 mass parts dimethyl diallyl ammonium chloride aqueous solution is mixed with 25 mass parts epichlorohydrin, and logical nitrogen is protected, wherein the mass concentration of dimethyl diallyl ammonium chloride aqueous solution is 30 %;

[0028] S2: Mix 0.5 parts by mass of initiator with 21 parts by mass of water to make an initiator mixed solution. Under water bath conditions, control the temperature at 45-55° C., add part of the initiator mixed solution to the reaction system in S1, and mix Stir for 60 minutes, heat up to 75-85°C, add the remaining initiator mixture, mix and stir for 50 minutes, wherein the initiator is a mixture of ammonium persulfate, sodium bisulfite, sodium sulfite and potassium persulfate, the part of the initiator added first is mixed The mass ratio of the solution to the remaining initiator mixed soluti...

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Abstract

The invention provides a preparation method of a flocculating agent for petroleum refining delayed coking oily sewage treatment, which comprises the following steps: S1, mixing a dimethyl diallyl ammonium chloride water solution with epoxy chloropropane, and introducing nitrogen for protection; S2, uniformly mixing an initiator with water to prepare an initiator mixed solution, controlling the temperature to be 25-55 DEG C under a water bath condition, adding a part of the initiator mixed solution into the reaction system in the step S1, mixing and stirring the components for 30-90 minutes, heating the mixture to 55-90 DEG C, adding the rest initiator mixed solution, and mixing and stirring the components for 30-60 minutes; S3, continuing to add liquid ferric sulfate, and mixing and stirring the components for 30-60 minutes. The flocculating agent provided by the invention is small in dosage, contributes to reducing the oil content and COD (Chemical Oxygen Demand) of sewage, is good inusing effect, and can effectively reduce devices and equipment and shorten a water treatment process; the preparation method of the flocculating agent is simple and can be suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a preparation method of a flocculant for delayed coking oily sewage treatment in petroleum refining. Background technique [0002] In the field of petrochemical industry, delayed coking is currently one of the main means to convert cheap heavy oil into high value-added light oil products. However, it is difficult to treat the sewage generated by the delayed coking unit. Most of the delayed coking units in domestic oil refineries use empty sewage and treat it through gravity settling tanks and degreasers. The treated sulfur-containing sewage still contains a large amount of emulsified oil, which will This brings a large processing load to subsequent devices. Some oil refineries use flocculation and demulsification for treatment, but three times of dosing are required, and the dosage is large, and there are many dosing tanks and dosing devices, which makes the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52C02F1/54C02F103/36
CPCC02F1/5245C02F1/54C02F2103/365C02F2209/08
Inventor 曹意卢惠娟是欢芬汤苗冠
Owner 常州市振邦化工制造有限公司