CN111440644A - Harmless recycling treatment method for oily sludge - Google Patents
Harmless recycling treatment method for oily sludge Download PDFInfo
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- CN111440644A CN111440644A CN202010321676.6A CN202010321676A CN111440644A CN 111440644 A CN111440644 A CN 111440644A CN 202010321676 A CN202010321676 A CN 202010321676A CN 111440644 A CN111440644 A CN 111440644A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/324—Dispersions containing coal, oil and water
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
- C10L1/326—Coal-water suspensions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/093—Coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0913—Carbonaceous raw material
- C10J2300/0946—Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention is a harmless resource treatment method for oil-containing sludge, the invention can directly use the oil-containing sludge as the raw material of coal water slurry without special treatment steps such as dehydration and flocculation, and the oil-containing sludge is firstly slurried and then mixed with the coal water slurry according to the amount of water. The method has the advantages of simple operation, less energy consumption, low cost, no secondary pollution, capability of changing waste into valuable, economy and practicality, better economic benefit and environmental protection value and wide application prospect.
Description
Technical Field
The invention relates to the field of environmental protection and petrochemical coal gasification, in particular to a harmless recycling treatment method for oily sludge, which has the advantages of simple operation, low energy consumption, low cost and no secondary pollution.
Background
The oil sludge mainly refers to oil-containing sludge formed by crude oil or other oil products, soil and the like due to various reasons, oil-containing silt and the like carried out by a system in normal production of an oil field, and is solid waste rich in mineral oil, and the main components of the oil sludge are crude oil, mud and water. The solid particle size may range from less than a few microns to several inches, mostly between 1 and 100 microns, the composition of the oil depending on the crude oil type, refinery configuration and operating conditions, and the composition of the sludge may vary over time. The sludge usually contains a certain amount of crude oil (concentration mass 5-80%), heavy metal ions (such as iron, copper, nickel and the like) and inorganic salt compounds (concentration mass 5-20%), and the like. These oil sludges generally contain benzene series, phenols and other substances, along with malodor and toxicity, and if the oil sludges directly contact with the natural environment, the oil sludges, acidifies or alkalifies the land, so that the soil and the soil texture structure are changed, the growth of plant roots is hindered, water and vegetation are greatly polluted, and meanwhile, the waste of oil resources is also implied.
In petroleum refining enterprises and oil field ground treatment systems, crude oil or finished oil is stored in a storage tank for a long time, inorganic impurities such as high-melting-point wax, asphaltene, colloid and entrained silt in the crude oil and water can be changed into precipitates together, and oily sludge is formed at the bottom of the tank. The oil-containing sludge at the tank bottom is rich in organic matters and complex in components, easily causes environmental pollution and is difficult to reuse, the oil sludge at the tank bottom is a heavy burden of oil field enterprises all the time, and the oil sludge at the tank bottom has great harm to the environment and is confirmed to belong to dangerous waste in the national hazardous waste record at present. The oily sludge must be treated.
The prior technology for treating the oily sludge mainly comprises resource recovery, harmless treatment, comprehensive utilization technology and the like. The resource recovery treatment technology comprises a solvent extraction method, a water washing method, a microemulsion washing method, a demulsification method and the like. The harmless treatment technology of the oil sludge comprises the technologies of immobilization treatment, biological treatment, incineration and the like. Comprehensive utilization techniques include pyrolysis, brick-making paving, and other uses. The treatment technology of the oil sludge is various, and each method has respective advantages and disadvantages and application range. With the increasingly strict and perfect environmental protection regulations, the oil field oil-containing sludge treatment technology draws high attention, and the oil-containing sludge treatment technology with harmlessness, recycling and comprehensive utilization becomes a necessary trend for the development of the oil sludge treatment technology.
The treatment technology of the oily sludge is numerous, but different problems exist, such as a hot water washing method, the oily sludge with serious emulsification is difficult to treat, and secondary pollution can be generated; the burning method can reduce the treatment to the maximum extent, but the low heat utilization rate has requirements on the heat value of the raw materials and can generate dust and gas pollution; the dissolution extraction method has the defects of high cost, high treatment cost, loss in the process, long treatment period of the biological treatment method, poor treatment effect on partial organic matters, incapability of utilizing resources and the like. Therefore, a method which has high applicability, low cost and can effectively utilize resources is needed.
China patent 'method for producing synthesis gas by taking oil sludge as raw material' (application number: CN201010222414.0) proposes a method for producing synthesis gas by taking oil sludge as raw material, and pretreated oil sludge and coal water slurry are mixed and enter a gasification furnace for gasification.
Chinese patent ' a method for harmless treatment of dewatered coal slurry of oily sludge ' (application number: 201710110330.X) ' adds flocculant to oil sludge, dries and dehydrates the oil sludge, and then uses the oil sludge as a raw material to carry out pulping gasification. The oily sludge is required to be dehydrated, the energy consumption in the process is high, and the oily sludge with low concentration is not suitable for oily sludge.
Chinese patent 'a compound water washing agent for extracting crude oil from waste oil sludge' (application No. CN100386271C) introduces a compound water washing agent prepared from raw materials such as an anionic surfactant (sodium dodecyl sulfate), a nonionic surfactant (fatty alcohol-polyoxyethylene ether and alkylphenol ethoxylate), an auxiliary agent (sodium carboxymethylcellulose), a solvent (propylene glycol methyl ether acetate), water and the like. Under normal temperature and pressure, the oil content of the oil sludge is less than 1 percent after the oil sludge is treated.
The Niren minister (journal of national university of southwest (Nature science edition), volume 29 and increase in 2003, 17-18) reports a low-cost solidification and incineration innocent treatment technology for oil sludge sand, after oil sludge is collected, oil sludge is solidified by using a curing agent for special equipment, the solidified oil-containing sludge sand and boiler coal are mixed and enter a boiler for combustion, the waste residue after combustion is used as a building material waste residue, and the waste gas is discharged into the atmosphere after dust removal of a coal-fired boiler dust removal system reaches the standard.
The existing mud oil treatment methods have the defects of complex process, high treatment cost, low utilization of effective components and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention discloses a harmless resource treatment method suitable for oily sludge with different components. After the collected oily sludge is pretreated, large impurity (larger than 1mm) particles are filtered out, and the rest is used as gasification pulping raw materials to be prepared into coal water slurry for a gasification furnace together with coal.
In order to achieve the purpose, the invention adopts the following technical scheme:
a harmless resource treatment method for oily sludge comprises the following steps:
(1) pretreating oil-containing sludge;
(2) preparing coal water slurry: mixing and stirring coal powder, an additive and water to prepare coal water slurry;
(3) preparing oil-containing slurry coal slurry: mixing and stirring the oily sludge obtained in the step (1) and the coal water slurry obtained in the step (2) to prepare oily sludge water coal slurry;
(4) and (4) carrying out gasification reaction on the oil-containing slurry coal slurry prepared in the step (3).
In the invention, the oily sludge with the solid content of less than 10 percent has the main component of water and low solid content, can be used as water and coal powder to prepare the coal water slurry, is designed into the slurry concentration, ensures the gasification performance, and can be prepared into the coal water slurry with stable performance.
The solid content is between 10 and 30 percent, the oily sludge which can flow well can be directly mixed with the fully mixed coal water slurry according to the designed concentration, the solid content is higher than 30 percent, the viscosity of the oily sludge which is difficult to flow is reduced after the oily sludge is heated at 60 to 80 ℃, the fluidity of the oily sludge is improved, the oily sludge and the coal water slurry are scientifically and reasonably mixed, the oily sludge is added into the mixed coal water slurry, the mixture is stirred into slurry, and the prepared mixed slurry has low viscosity, better fluidity and better stability.
And finally, the sludge is sent into a gasification furnace for high-temperature gasification to generate heat value gas, so that harmless recycling treatment of the sludge is realized.
Preferably, the oil-containing slurry coal slurry comprises the following components in parts by weight: 10-20 parts of oily sludge, 50-56 parts of coal powder, 0.3-0.5 part of additive and 0-34.5 parts of water.
Preferably, the pretreatment in step (1) is to filter out particles with a particle size of more than 1 mm; directly mixing the oil-containing sludge with the solid content of 10-30% with the coal water slurry; the oily sludge with the solid content of more than 30 percent is heated or added with water and then mixed with the coal water slurry.
Preferably, the additive in the step (2) is prepared from the following raw materials in parts by weight: 50-100 parts of lignosulfonate, 5-10 parts of acrylic acid, 5-10 parts of sodium bisulfite, 5-20 parts of acrylate and 30-50 parts of naphthalenesulfonate.
The lignosulfonate can be selected from a series of lignosulfonate such as sodium lignosulfonate, calcium lignosulfonate or ammonium lignosulfonate; the acrylate can be selected from sodium acrylate, potassium acrylate or magnesium acrylate; the naphthalenesulfonate can be selected from a series of acrylates such as sodium naphthalenesulfonate, potassium naphthalenesulfonate or calcium naphthalenesulfonate.
The acrylic acid grafted on the lignosulfonate macromolecules contains carboxyl with strong electron-withdrawing capability, so that hydrogen bonds are easily formed with the surfaces of coal particles, and meanwhile, the hydrophobicity of the surfaces of the coal particles is reduced, so that the viscosity of the coal water slurry is reduced.
Preferably, the coal powder in the step (2) is the nakedflower coal, and the particle size of the coal powder is less than or equal to 1 mm.
Preferably, in the step (2) and the step (3), the rotation speed of mixing and stirring is 200-600rpm, and the stirring time is 5-20 min.
Preferably, the viscosity of the mixed water-coal-slurry prepared in the step (3) is lower than 800mPa.s, and the final solid content is 55-62%.
Preferably, the gasification reaction temperature in the step (4) is 1100-1500 ℃, the gasification pressure is 0.8-4.0MPa, and the gasification reaction time is 6-10 s. The organic matters in the oily sludge are fully decomposed and gasified, and a small amount of heavy metals in the sludge can be solidified in the glassy gasification slag, so that the harmless treatment is realized.
The invention has the beneficial effects that: the invention can directly use the oily sludge as the raw material of the coal water slurry by adjusting the slurry forming sequence without special treatment steps, energy consumption dehydration, flocculant addition and the like, can further save the step of sewage treatment according to the amount of water, and fully utilizes the heat and the water of the oily sludge. When the mixed slurry is prepared, in order to avoid high viscosity, the coal water slurry is prepared first, and then the oil-containing slurry is added for mixing, so that the viscosity of the slurry is reduced. And meanwhile, the prepared mixed slurry is gasified by using a gasification furnace, and finally, harmless resource treatment of the oily sludge is realized. The method has the advantages of simple operation, less energy consumption, low cost, no secondary pollution, capability of changing waste into valuable, economy and practicality, better economic benefit and environmental protection value and wide application prospect.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The invention is further illustrated by the following specific examples, but the invention is not thereby limited within the scope of the examples.
Example 1
Referring to fig. 1, the oil sludge example of a certain oil production plant contains 2% of water, 50.1% of oil and 47.9% of silt.
Taking 10 parts of oily sludge, 55 parts of medicated wood coal and 0.5 part of additive, then adding 34.5 parts of water, treating the oily sludge according to a pretreatment method (filtering out particles with the particle size of more than 1mm), then preparing the oily sludge and the coal water slurry into mixed slurry, and stirring the mixed slurry and the coal water slurry in a container at 500rpm for 5 minutes to prepare the oily sludge water coal slurry. The prepared slurry containing the oil-bearing cement has good fluidity, the solid content is 59.3 percent through detection, the viscosity is 638mpa.s, and no hard precipitate is generated after the slurry is placed for 24 hours. The prepared coal slurry containing oil slurry is sent into a gasification furnace for gasification and combustion, and the effective gas component reaches 78 percent.
In the embodiment, the additive is prepared from the following raw materials in parts by weight: 50 parts of sodium lignosulphonate, 5 parts of acrylic acid, 5 parts of sodium bisulfite, 10 parts of sodium acrylate and 50 parts of sodium naphthalenesulphonate.
Example 2
Taking oil sludge of a certain oil refinery sewage treatment station as an example, the water content is 88.9%, the oil content is 8.8%, and the silt content is 2.3%.
43.7 parts of oily sludge, 56 parts of nakedflower coal and 0.3 part of additive are taken, and the oily sludge can be directly used as slurry prepared from water, coal and the additive due to more water content in the sludge and stirred for 10 minutes in a container at 300rpm to prepare the oily sludge-water coal slurry. The prepared slurry containing the oil-bearing mud has good fluidity, the solid content is 58.1 percent and the viscosity is 567mpa.s through detection, and no hard precipitate is generated after the slurry is placed for 24 hours. The prepared coal slurry containing the oil sludge is sent into a gasification furnace for gasification and combustion, and the effective gas component reaches 73 percent.
In the embodiment, the additive is prepared from the following raw materials in parts by weight: 80 parts of sodium lignosulphonate, 10 parts of acrylic acid, 8 parts of sodium bisulfite, 5 parts of sodium acrylate and 30 parts of sodium naphthalenesulphonate.
Example 3
Taking the bottom mud of a certain oil tank as an example, the bottom mud contains 35 percent of water, 40 percent of oil and 25 percent of silt.
Taking 20 parts of oily sludge, 50 parts of medicated wood coal, 0.5 part of additive and 29.5 parts of water, stirring and heating the oily sludge to enable the oily sludge to have fluidity, and stirring the coal, the additive and the water in a container at 500rpm for 10 minutes to prepare the coal-water slurry. And then mixing the two, stirring for 10 minutes at 500rpm to prepare the coal slurry containing the oil-containing muddy water, wherein the prepared coal slurry containing the oil-containing muddy water has good fluidity, the solid content is 61.2 percent and the viscosity is 724mpa.s, and no hard precipitate is generated after the prepared coal slurry containing the oil-containing muddy water is placed for 24 hours. The prepared coal slurry containing the oil-bearing slurry is sent into a gasification furnace for gasification and combustion, and the effective gas component reaches 81 percent.
In the embodiment, the additive is prepared from the following raw materials in parts by weight: 100 parts of sodium lignosulphonate, 8 parts of acrylic acid, 10 parts of sodium bisulfite, 20 parts of sodium acrylate and 40 parts of sodium naphthalenesulfonate.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (8)
1. The harmless and resource treatment method of the oily sludge is characterized by comprising the following steps:
(1) pretreating oil-containing sludge;
(2) preparing coal water slurry: mixing and stirring coal powder, an additive and water to prepare coal water slurry;
(3) preparing oil-containing slurry coal slurry: mixing and stirring the oily sludge obtained in the step (1) and the coal water slurry obtained in the step (2) to prepare oily sludge water coal slurry;
(4) and (4) carrying out gasification reaction on the oil-containing slurry coal slurry prepared in the step (3).
2. The method for harmless resource treatment of the oily sludge according to claim 1, wherein the oily sludge slurry comprises the following components in parts by weight: 10-20 parts of oily sludge, 50-56 parts of coal powder, 0.3-0.5 part of additive and 0-34.5 parts of water.
3. The method for harmless resource utilization of oily sludge as claimed in claim 1, wherein said pretreatment in step (1) is to filter out particles with a particle size of more than 1 mm; directly mixing the oil-containing sludge with the solid content of 10-30% with the coal water slurry; the oily sludge with the solid content of more than 30 percent is heated or added with water and then mixed with the coal water slurry.
4. The method for harmless resource treatment of oily sludge according to claim 1, wherein the additive in the step (2) is prepared from the following raw materials in parts by weight: 50-100 parts of lignosulfonate, 5-10 parts of acrylic acid, 5-10 parts of sodium bisulfite, 5-20 parts of acrylate and 30-50 parts of naphthalenesulfonate.
5. The harmless resource treatment method of oily sludge according to claim 1, wherein the pulverized coal in the step (2) is shenmuke, and the particle size of the pulverized coal is less than or equal to 1 mm.
6. The method as claimed in claim 1, wherein the mixing and stirring speed in steps (2) and (3) is 200-600rpm, and the stirring time is 5-20 min.
7. The method for harmless resource treatment of oily sludge according to claim 1, wherein the viscosity of the mixed water-coal-slurry prepared in the step (3) is lower than 800mPa.s, and the final solid content is 55-62%.
8. The method for harmless resource treatment of oily sludge according to claim 1, wherein the gasification reaction temperature in step (4) is 1100-1500 ℃, the gasification pressure is 0.8-4.0MPa, and the gasification reaction time is 6-10 s.
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| CN202010321676.6A CN111440644A (en) | 2020-04-22 | 2020-04-22 | Harmless recycling treatment method for oily sludge |
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| CN202010321676.6A CN111440644A (en) | 2020-04-22 | 2020-04-22 | Harmless recycling treatment method for oily sludge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114873880A (en) * | 2022-06-13 | 2022-08-09 | 常州大学 | Oily sludge treatment system and method |
| CN116904242A (en) * | 2023-08-07 | 2023-10-20 | 国能龙源环保有限公司 | Multi-element solid waste disposal method and system based on coal-fired boiler cooperative disposal |
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| CN101831330A (en) * | 2010-05-26 | 2010-09-15 | 山东科技大学 | A kind of production method of clay coal water slurry |
| CN102311809A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for producing synthetic gas by using oil sludge as raw material |
| CN103980968A (en) * | 2014-05-28 | 2014-08-13 | 华东理工大学 | Oil-containing sludge coal slurry and preparation method thereof |
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2020
- 2020-04-22 CN CN202010321676.6A patent/CN111440644A/en active Pending
Patent Citations (3)
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| CN101831330A (en) * | 2010-05-26 | 2010-09-15 | 山东科技大学 | A kind of production method of clay coal water slurry |
| CN102311809A (en) * | 2010-07-07 | 2012-01-11 | 中国石油化工股份有限公司 | Method for producing synthetic gas by using oil sludge as raw material |
| CN103980968A (en) * | 2014-05-28 | 2014-08-13 | 华东理工大学 | Oil-containing sludge coal slurry and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114873880A (en) * | 2022-06-13 | 2022-08-09 | 常州大学 | Oily sludge treatment system and method |
| CN116904242A (en) * | 2023-08-07 | 2023-10-20 | 国能龙源环保有限公司 | Multi-element solid waste disposal method and system based on coal-fired boiler cooperative disposal |
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