CN111348816A - Deoiling agent for oil-containing sludge and deoiling treatment process thereof - Google Patents
Deoiling agent for oil-containing sludge and deoiling treatment process thereof Download PDFInfo
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- CN111348816A CN111348816A CN202010257169.0A CN202010257169A CN111348816A CN 111348816 A CN111348816 A CN 111348816A CN 202010257169 A CN202010257169 A CN 202010257169A CN 111348816 A CN111348816 A CN 111348816A
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- oil
- oily sludge
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/127—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering by centrifugation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
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- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention relates to an oil removing agent for oily sludge and a deoiling treatment process thereof, which comprises polyacrylamide, nonylphenol polyoxyethylene ether and water which are mixed according to any proportion; the concentration of polyacrylamide is 0.5 per mill-1%. The oil content of the oily sludge with the oil content of more than 30 percent can be reduced to less than 5 percent after the oily sludge is treated by the method, and the oil recovery rate is more than 83 percent. The invention can remove and pull out the oil in the oily sludge, realizes the resource utilization of hazardous waste, changes waste into valuable, reduces the cost and improves the efficiency of enterprises; after the oil in the oily sludge is removed, the subsequent treatment difficulty and risk are greatly reduced, so that the method has great significance for environmental protection.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to an oily sludge deoiling agent for recycling oil-containing scum, pool bottom mud, tank bottom mud and the like generated in the sewage treatment process in the petrochemical industry and a deoiling treatment process thereof.
Background
In the process of petroleum processing and oily sewage treatment, a large amount of oily sludge is generated, which mainly comprises tank bottom sludge (oil separating tank, homogenizing tank, sedimentation tank and the like), tank bottom sludge and oily scum generated by an air floatation process, and the oily scum is usually referred to as oil sludge. The oil-containing sludge is mainly composed of water, suspended solid, oil and the like, contains toxic and harmful substances such as benzene series, phenols and the like, is listed in hazardous solid wastes (HW-08, 2016) by China, and is also required to be subjected to harmless treatment in national clean production promotion laws and solid waste environmental pollution prevention laws.
The oil sludge has complex components, greatly different physical and chemical properties and the like, and various treatment technologies. At present, methods such as incineration, coking and recycling, solvent extraction, thermal desorption, thermochemical cleaning and the like are mainly adopted. Through investigation, the domestic oil sludge outsourcing cost is more than 2000 yuan/t, part of oil refineries are limited by geographical positions, oil sludge treatment processes and the like, and the cost for treating oil sludge per ton is even more than 3000 yuan.
The method mainly aims at the sludge dewatering and reducing treatment, but for the oil-containing sludge deoiling treatment, the related technologies are not many at present, and particularly in industrial application.
Based on this, it is necessary to develop the research of the deoiling treatment process of the oil-containing sludge, which is the premise of the advanced treatment, reduction and harmless treatment of the oil sludge. Meanwhile, the oily sludge is rich in a large amount of hydrocarbons, and the implementation of oil sludge recycling meets the requirements of strategic guidelines of circular economy and sustainable development. If the comprehensive utilization of the oily sludge is reasonably carried out, the oily sludge becomes a valuable secondary resource. Therefore, the proper, reasonable and effective treatment of the oily sludge has attracted great attention, and the comprehensive utilization of the oily sludge is bound to become the key point of scientific and technological research at home and abroad.
Disclosure of Invention
The invention aims to provide an oil-containing sludge deoiling agent and an oil-removing treatment process thereof, which can remove and pull out oil in oil-containing sludge, realize resource utilization of dangerous waste, change waste into valuable, reduce cost and improve efficiency for enterprises, greatly reduce subsequent treatment difficulty and risk and are environment-friendly, aiming at the defects that the oil-containing sludge pollutes the environment in the prior art.
An oil removing agent for oily sludge, which comprises polyacrylamide, nonylphenol polyoxyethylene ether and water which are mixed according to any proportion;
the concentration of the polyacrylamide is 0.5 per mill-1%.
A deoiling treatment process for treating oily sludge by using the deoiling agent for oily sludge comprises the following steps:
1) the oily sludge is pretreated by a water injection and heating pretreatment unit to form a mixture with solid content of 90-98% and temperature of 25-90 ℃. The pretreatment comprises the following steps: injecting water, and then heating while stirring.
2) And (3) the mixture passes through a mixing demulsification unit, and is fully mixed with the oily sludge deoiling agent for reaction, so that oil molecules attached to the surfaces of oily sludge particles in the mixture are demulsified.
3) After demulsification, the mixture passes through a mechanical oil and solid removal unit, so that oil, solid and water are thoroughly separated.
In one embodiment, the mechanical oil removal and solids removal unit comprises a primary centrifugal device or a primary centrifugal device and a secondary centrifugal device connected in series.
In one embodiment, the water separated in step 3) can be recycled to the pretreatment water injection process in step 1).
The invention has the advantages and beneficial effects that:
1. the oil content of the oily sludge with the oil content of more than 30 percent can be reduced to less than 5 percent after the oily sludge is treated by the method, and the oil recovery rate is more than 83 percent. The invention can remove and pull out the oil in the oily sludge, realizes the resource utilization of hazardous waste, changes waste into valuable, reduces the cost and improves the efficiency of enterprises; after the oil in the oily sludge is removed, the subsequent treatment difficulty and risk are greatly reduced, so that the method has great significance for environmental protection.
2. The treatment objects of the invention are oil-containing scum, pool bottom mud, tank bottom mud and the like generated in the sewage treatment process in the petrochemical industry.
3. The deoiling agent for the oily sludge has the advantages of simple components, convenient operation and low cost, and is suitable for deoiling treatment of different oily sludge.
4. The polyacrylamide of the invention: the sludge phase solid particles in the oily sludge are adsorbed together by flocculation, adsorption bridging and surface adsorption principles, and the separation and dehydration of oil and sludge are facilitated. Polyoxyethylene nonyl phenyl ether: the surfactant is used for washing oil in oil sludge, and when oil sludge particles and oil drops are emulsified together, the oil and the sludge particles in the oil sludge are separated through the functions of penetration, wetting, emulsification and dispersion.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "disposed" on another element, it can be directly disposed or attached to the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Example 1
Referring to fig. 1, an oil-containing sludge degreasing agent 4 comprises polyacrylamide, nonylphenol polyoxyethylene ether mixed in any proportion, and water. The concentration of polyacrylamide is 0.5 per mill-1%.
A deoiling treatment process for treating oily sludge by using the deoiling agent for oily sludge comprises the following steps:
1) the oily sludge with the oil content of more than 30 percent is pretreated by a water injection heating pretreatment unit 1 to form a mixture with the solid content of 90 to 98 percent and the temperature of 25 to 90 ℃. The pretreatment comprises the following steps: injecting water, and then heating while stirring.
2) And (3) the mixture passes through a mixing demulsification unit 2, and is fully mixed with an oily sludge deoiling agent 4 for reaction, so that oil molecules attached to the surfaces of oily sludge particles in the mixture are demulsified.
3) After demulsification, the mixture passes through a mechanical oil and solid removal unit 3, so that oil 5, solid 7 and water 6 are thoroughly separated.
Wherein, the oil content in the solid 7 (namely in the mud) finally separated in the step 3) is reduced to below 5 percent, and the subsequent treatment difficulty and risk are greatly reduced.
The mechanical oil removal and solidification removal unit 3 in this embodiment 1 includes a primary centrifugal device. It should be noted that: in other embodiments, the mechanical oil removal and solids removal unit 3 may also be a primary centrifugal device and a secondary centrifugal device in series.
Specifically, the water 6 separated in the step 3) can be recycled to the pretreatment water injection process in the step 1) as shown in fig. 1.
Specifically, the water injection heating pretreatment unit, mix the breakdown of emulsion unit and the solid unit composition oiliness mud deoiling device of taking off of mechanical deoiling, the device adopts sled dress formula or modular design, and the removal of being convenient for is moved, has: high treatment efficiency, small occupied area, simple operation and the like.
The invention has the advantages and beneficial effects that:
1. the oil content of the oily sludge with the oil content of more than 30 percent can be reduced to less than 5 percent after the oily sludge is treated by the method, and the oil recovery rate is more than 83 percent. The invention can remove and pull out the oil in the oily sludge, realizes the resource utilization of hazardous waste, changes waste into valuable, reduces the cost and improves the efficiency of enterprises; after the oil in the oily sludge is removed, the subsequent treatment difficulty and risk are greatly reduced, so that the method has great significance for environmental protection.
2. The treatment objects of the invention are oil-containing scum, pool bottom mud, tank bottom mud and the like generated in the sewage treatment process in the petrochemical industry.
3. The deoiling agent for the oily sludge has the advantages of simple components, convenient operation and low cost, and is suitable for deoiling treatment of different oily sludge.
4. The polyacrylamide of the invention: the sludge phase solid particles in the oily sludge are adsorbed together by flocculation, adsorption bridging and surface adsorption principles, and the separation and dehydration of oil and sludge are facilitated. Polyoxyethylene nonyl phenyl ether: the surfactant is used for washing oil in oil sludge, and when oil sludge particles and oil drops are emulsified together, the oil and the sludge particles in the oil sludge are separated through the functions of penetration, wetting, emulsification and dispersion.
The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.
Claims (4)
1. The oil removing agent for the oily sludge is characterized by comprising polyacrylamide, nonylphenol polyoxyethylene ether and water which are mixed according to any proportion;
the concentration of the polyacrylamide is 0.5 per mill-1%.
2. A deoiling treatment process for treating oily sludge by using the deoiling agent for oily sludge according to claim 1, which is characterized by comprising the following steps of:
1) pretreating the oily sludge by a water injection heating pretreatment unit to form a mixture with the solid content of 90-98% and the temperature of 25-90 ℃;
the pretreatment comprises the following steps: injecting water, and then heating while stirring;
2) the mixture passes through a mixing demulsification unit, and after the mixture is fully mixed and reacted with the oily sludge deoiling agent, oil molecules attached to the surfaces of oily sludge particles in the mixture are demulsified;
3) after demulsification, the mixture passes through a mechanical oil and solid removal unit, so that oil, solid and water are thoroughly separated.
3. The deoiling process for treating oily sludge by using the deoiling agent for oily sludge according to claim 2, wherein the mechanical deoiling and desoliding unit comprises a primary centrifugal device or a primary centrifugal device and a secondary centrifugal device which are connected in series.
4. The deoiling treatment process for treating oil-containing sludge by using the deoiling agent for oil-containing sludge according to claim 2, wherein the water separated in the step 3) can be recycled to the water injection pretreatment process in the step 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257169.0A CN111348816A (en) | 2020-04-03 | 2020-04-03 | Deoiling agent for oil-containing sludge and deoiling treatment process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257169.0A CN111348816A (en) | 2020-04-03 | 2020-04-03 | Deoiling agent for oil-containing sludge and deoiling treatment process thereof |
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| CN111348816A true CN111348816A (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010257169.0A Pending CN111348816A (en) | 2020-04-03 | 2020-04-03 | Deoiling agent for oil-containing sludge and deoiling treatment process thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106957136A (en) * | 2017-03-02 | 2017-07-18 | 安徽省通源环境节能股份有限公司 | A kind of processing method of oily sludge |
| CN107601797A (en) * | 2017-11-03 | 2018-01-19 | 北京博惠通科技发展有限公司 | A kind of oil-sludge treatment agent and oil-sludge treatment method |
-
2020
- 2020-04-03 CN CN202010257169.0A patent/CN111348816A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106957136A (en) * | 2017-03-02 | 2017-07-18 | 安徽省通源环境节能股份有限公司 | A kind of processing method of oily sludge |
| CN107601797A (en) * | 2017-11-03 | 2018-01-19 | 北京博惠通科技发展有限公司 | A kind of oil-sludge treatment agent and oil-sludge treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 张光华: "《水处理化学品制备与应用指南》", 31 October 2003, 中国石化出版社 * |
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| CB03 | Change of inventor or designer information |
Inventor after: Zhou Fujian Inventor after: Tan Hong Inventor after: Yang Junwen Inventor after: Tan Chuanning Inventor before: Zhou Fujian Inventor before: Tan Hong Inventor before: Yang Junwen Inventor before: Li Weihang Inventor before: Tan Chuanning |
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Effective date of registration: 20230423 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Applicant after: CHINA PETROLEUM & CHEMICAL Corp. Applicant after: CHANGLING BRANCH, CHINA PETROLEUM CHEMICAL Corp. Applicant after: YUEYANG CHANGLING EQUIPMENT RESEARCH INSTITUTE Co.,Ltd. Address before: 414000 Changling, Yunxi District, Yueyang City, Hunan Province Applicant before: YUEYANG CHANGLING EQUIPMENT RESEARCH INSTITUTE Co.,Ltd. |
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