CN111792807A - Polymer-containing oil sludge treatment device and method based on supercritical water gasification process - Google Patents
Polymer-containing oil sludge treatment device and method based on supercritical water gasification process Download PDFInfo
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- CN111792807A CN111792807A CN202010700581.5A CN202010700581A CN111792807A CN 111792807 A CN111792807 A CN 111792807A CN 202010700581 A CN202010700581 A CN 202010700581A CN 111792807 A CN111792807 A CN 111792807A
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- containing oil
- oil sludge
- water gasification
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229920000642 polymer Polymers 0.000 title claims abstract description 76
- 238000002309 gasification Methods 0.000 title claims abstract description 73
- 239000010802 sludge Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000008569 process Effects 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 34
- 239000000047 product Substances 0.000 claims abstract description 22
- 239000012263 liquid product Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 238000004458 analytical method Methods 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
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Classifications
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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
-
- 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
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/06—Natural gas; Synthetic natural gas obtained by processes not covered by C10G, C10K3/02 or C10K3/04
- C10L3/08—Production of synthetic natural gas
-
- 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
- C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
- C10L2290/04—Gasification
Abstract
The invention discloses a polymer-containing oil sludge treatment device and method based on a supercritical water gasification process, aiming at the characteristic of the viscous state of polymer-containing oil sludge, a continuous stirring kettle is arranged before the polymer-containing oil sludge enters a supercritical water gasification reactor, the continuous stirring kettle can meet the condition required by the liquefaction of the polymer-containing oil sludge, the viscous state of the polymer-containing oil sludge is changed, the liquid has good fluidity, meanwhile, the polymer has complex cross-linked macromolecular chains, and the hydrolyzed micromolecular group greatly reduces the subsequent complete gasification condition of the supercritical water gasification, thereby achieving higher gasification effect and greatly improving the gasification efficiency. The gas-liquid separator can separate gas and liquid of products which are treated subsequently and come out from the supercritical water gasification reactor, so that the separation of the gas products and the liquid products is realized, and the comprehensive utilization and analysis of the gas products and the liquid products are realized.
Description
Technical Field
The invention belongs to the field of polymer-containing oil sludge treatment, and particularly relates to a polymer-containing oil sludge treatment device and method based on a supercritical water gasification process.
Background
As the oil field exploitation begins to enter the third oil recovery technology stage, the polymer flooding technology has become an important means for increasing the production of the oil field exploitation. Along with the great economic benefit brought by the polymer flooding technology, the problems brought by the increasing polymer-containing oil sludge are more and more not ignored. The polymer-containing oil sludge is already listed in dangerous solid wastes, and because the offshore oil field has limited space and short operation flow, the polymer-containing oil sludge causes serious pollution to surrounding soil, water and air, has great threat to the health of human beings and cannot be directly discharged.
The prior method for treating the polymer-containing oil sludge mainly comprises the following steps: incineration, pyrolysis, microbial degradation, and the like. Compared with the traditional oil sludge treatment methods, the supercritical water has excellent physicochemical properties, a small amount of hydrogen bonds, low dielectric constant, high diffusion coefficient and high polymer mobility, so that the supercritical water has high solubility to organic matters, the chemical reaction rate of the supercritical water is extremely high due to the characteristics, and the polymer-containing oil sludge can be converted into combustible gas rich in hydrogen. The technology does not need drying treatment, has no secondary pollution, and can achieve the purpose of resource utilization of polymer-containing oil sludge.
Disclosure of Invention
The invention aims to overcome the defects that the sticky state of polymer-containing oil sludge cannot achieve efficient gasification of the polymer-containing oil sludge, and provides a polymer-containing oil sludge treatment device and method based on a supercritical water gasification process.
In order to achieve the aim, the polymer-containing oil sludge treatment device based on the supercritical water gasification process comprises a continuous stirring kettle, a supercritical water gasification device and a gas-liquid separator;
the top of continuous type stirred tank is offered and is used for sending into the raw materials entry that contains polymer fatlute, and continuous type stirred tank lets in and contains polymer fatlute raw materials and subcritical water, and continuous type stirred tank's export communicates with each other with supercritical water gasification device's entry, and supercritical water gasification device lets in supercritical water, and gas-liquid separator entry, gas-liquid separator's export discharge gas product and liquid product are connected to supercritical water gasification device's upper portion export.
The raw material inlet at the top of the continuous stirring kettle is connected with a spiral feeding device, and the polymer-containing oil sludge raw material is fed into the continuous stirring kettle through the spiral feeding device.
And an inlet of subcritical water is arranged on the side surface of the continuous stirring kettle.
A treatment method of a polymer-containing oil sludge treatment device based on a supercritical water gasification process comprises the following steps:
feeding a polymer-containing oil sludge raw material into a continuous stirring kettle, and performing subcritical water liquefaction reaction with subcritical water to obtain a mixture A;
secondly, the mixture A enters a supercritical water gasification device, and is subjected to supercritical water gasification reaction with supercritical water in the supercritical water gasification device to obtain a mixture B;
and step three, enabling the mixture B to enter a gas-liquid separator, and realizing the separation of a gas product and a liquid product in the gas-liquid separator.
In the first step, the polymer-containing oil sludge raw material is sent into a continuous stirring kettle through a spiral feeding device.
In the first step, the mass ratio of the polymer-containing oil sludge to the subcritical water is 1: (1-5).
In the first step, the continuous stirring kettle is controlled to be 13-25 Mpa, the temperature is 150-370 ℃, and the high-torque magnetic driving stirring speed is 0-1800 rpm.
In the second step, the temperature of the supercritical water is 500-750 ℃, and the pressure is 23-25 Mpa.
In the second step, the feeding mass ratio of the mixture A to the supercritical water is 1: (1-5).
Compared with the prior art, the continuous stirring kettle is arranged before the polymer-containing sludge enters the supercritical water gasification reactor aiming at the characteristic of the viscous state of the polymer-containing sludge, the continuous stirring kettle can meet the condition required by the subcritical liquefaction of the polymer-containing sludge, the state of the polymer-containing sludge is changed, the liquid has good fluidity, the polymer has complex cross-linked macromolecular chains, and the hydrolyzed micromolecular group greatly reduces the subsequent complete gasification condition of the supercritical water gasification, thereby achieving higher gasification effect and greatly improving the gasification efficiency. The gas-liquid separator can separate gas and liquid of products which are treated subsequently and come out from the supercritical water gasification reactor, so that the separation of the gas products and the liquid products is realized, and the comprehensive utilization and analysis of the gas products and the liquid products are realized.
Furthermore, the invention adopts a spiral feeding device for feeding, and overcomes the high viscosity of the polymer-containing oil sludge.
Drawings
Fig. 1 is a schematic structural view of the whole of the present invention.
Wherein: 1-a screw feeder; 2-subcritical water; 3-a continuous stirring kettle; 4-supercritical water gasification unit; 5-supercritical water; 6-gas-liquid separator; 7-gas production; 8-liquid product.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, a polymer-containing oil sludge treatment device based on a supercritical water gasification process comprises a spiral feeding device 1, a continuous stirring kettle 3, a supercritical water gasification device 4 and a gas-liquid separator 6;
the raw materials entry at continuous type stirred tank 3's top is connected with spiral feed arrangement 1, it sends into continuous type stirred tank 3 through spiral feed arrangement 1 to contain oily sludge raw materials, continuous type stirred tank 3 lets in subcritical water 2, the side at continuous type stirred tank 3 is opened to the entry of subcritical water 2, the export of continuous type stirred tank 3 communicates with each other with supercritical water gasification device 4's entry, supercritical water gasification device 4's entry can be in supercritical water gasification device 4's upper portion or middle part or lower part, supercritical water gasification device 4 lets in supercritical water 5, supercritical water gasification device 4's export connection vapour and liquid separator 6 entry, vapour and liquid separator 6's export discharge gas product 7 and liquid product 8.
A treatment method of a polymer-containing oil sludge treatment device based on a supercritical water gasification process comprises the following steps:
firstly, feeding a polymer-containing oil sludge raw material into a continuous stirring kettle 3 through a spiral feeding device 1, performing subcritical water liquefaction reaction with subcritical water 2, and liquefying a raw material which is difficult to flow into a raw material which is easy to flow into a liquid which is easy to flow to obtain a mixture A; the continuous stirring kettle 3 is controlled to be 13-20 Mpa, the temperature is 150-370 ℃, and the high-torque magnetic driving stirring speed is 0-1800 rpm; according to the analysis of practical experiments, the final product of the raw material containing the polymer oil sludge in the step is 30-60% of an oil phase product, 30-60% of a water phase product and 1-5% of a gas phase product. The step can finish modification of the polymer-containing oil sludge, greatly reduces the viscosity of the polymer-containing oil sludge, and enables the viscous polymer-containing oil sludge raw material to flow.
Secondly, the mixture A enters a supercritical water gasification device 4, and is subjected to supercritical water gasification reaction with supercritical water 5 in the supercritical water gasification device 4, so that high-efficiency gasification of polymer-containing oil sludge is achieved, and a mixture B is obtained; the temperature of the supercritical water 5 is 500-750 ℃, and the pressure is 23-25 Mpa; the mixture A is subjected to a gasification reaction with supercritical water in a supercritical region. The mixture B is a mixture of a large amount of generated gas and reacted liquid.
And step three, the mixture B enters a gas-liquid separator 6, and the gas product 7 and the liquid product 8 are separated in the gas-liquid separator 6, so that comprehensive resource utilization and analysis of polymer-containing oil sludge are achieved. The carbon gasification rate of the gas product 7 and the polymer-containing oil sludge raw material can reach 80-100% through calculation, so that the complete gasification utilization of the polymer-containing oil sludge is finally realized.
The liquefaction reaction in the continuous stirred tank can liquefy the viscous polymer-containing sludge which is difficult to flow into liquid with good fluidity. Therefore, the reaction conditions required by the supercritical water gasification reaction can be greatly reduced, the requirement on the supercritical water gasification reactor is reduced, and the gasification rate of the polymer-containing oil sludge is greatly improved.
The separation of the liquid phase product and the gas phase product is realized by carrying out gas-liquid separation on the product after the reaction is finished, so that the comprehensive utilization of the polymer-containing oil sludge in harmlessness, reduction and recycling is realized.
The present invention will be described in further detail with reference to examples.
Example 1:
step one, the raw material containing the polymer-containing oil sludge is sent into a continuous stirring kettle 3 through a spiral feeding device 1, and the feeding mass ratio of the polymer-containing oil sludge to subcritical water is 1: 1, subjecting the raw material and subcritical water 2 to subcritical water liquefaction reaction, and liquefying the raw material which is difficult to flow into a raw material which is easy to flow into a liquid which is easy to flow, thereby obtaining a mixture A; the continuous stirring kettle 3 is controlled to be 13Mpa, the temperature is 150 ℃, and the high-torque magnetic driving stirring speed is 1000 rpm;
step two, the mixture A enters a supercritical water gasification device 4, and the feeding mass ratio of the mixture A to the supercritical water is 1: 1, performing supercritical water gasification reaction on a mixture A and supercritical water 5 in a supercritical water gasification device 4 so as to achieve high-efficiency gasification of polymer-containing oil sludge and obtain a mixture B; the temperature of the supercritical water 5 is 500 ℃, and the pressure is 23 Mpa;
and step three, the mixture B enters a gas-liquid separator 6, and the gas product 7 and the liquid product 8 are separated in the gas-liquid separator 6, so that comprehensive resource utilization and analysis of polymer-containing oil sludge are achieved.
Example 2:
step one, the raw material containing the polymer-containing oil sludge is sent into a continuous stirring kettle 3 through a spiral feeding device 1, and the feeding mass ratio of the polymer-containing oil sludge to subcritical water is 1: 3, subjecting the raw material and subcritical water 2 to subcritical water liquefaction reaction, and liquefying the raw material which is difficult to flow into a raw material which is easy to flow into a liquid which is easy to flow, thereby obtaining a mixture A; the continuous stirring kettle 3 is controlled to be 15Mpa, the temperature is 250 ℃, and the high-torque magnetic driving stirring speed is 1500 rpm;
step two, the mixture A enters a supercritical water gasification device 4, and the feeding mass ratio of the mixture A to the supercritical water is 1: 3, performing supercritical water gasification reaction on the mixture A and supercritical water 5 in a supercritical water gasification device 4, so as to achieve high-efficiency gasification of polymer-containing oil sludge and obtain a mixture B; the temperature of the supercritical water 5 is 650 ℃, and the pressure is 24 Mpa;
and step three, the mixture B enters a gas-liquid separator 6, and the gas product 7 and the liquid product 8 are separated in the gas-liquid separator 6, so that comprehensive resource utilization and analysis of polymer-containing oil sludge are achieved.
Example 3:
step one, the raw material containing the polymer-containing oil sludge is sent into a continuous stirring kettle 3 through a spiral feeding device 1, and the feeding mass ratio of the polymer-containing oil sludge to subcritical water is 1: 5, subjecting the raw material and subcritical water 2 to subcritical water liquefaction reaction, and liquefying the raw material which is difficult to flow into a raw material which is easy to flow into a liquid which is easy to flow, thereby obtaining a mixture A; the continuous stirring kettle 3 is controlled to be 20Mpa, the temperature is 370 ℃, and the high-torque magnetic driving stirring speed is 1800 rpm;
step two, the mixture A enters a supercritical water gasification device 4, and the feeding mass ratio of the mixture A to the supercritical water is 1: 5, performing supercritical water gasification reaction on the mixture A and supercritical water 5 in a supercritical water gasification device 4, so as to achieve high-efficiency gasification of polymer-containing oil sludge and obtain a mixture B; the temperature of the supercritical water 5 is 750 ℃, and the pressure is 25 Mpa;
and step three, the mixture B enters a gas-liquid separator 6, and the gas product 7 and the liquid product 8 are separated in the gas-liquid separator 6, so that comprehensive resource utilization and analysis of polymer-containing oil sludge are achieved.
Claims (9)
1. A polymer-containing oil sludge treatment device based on a supercritical water gasification process is characterized by comprising a continuous stirring kettle (3), a supercritical water gasification device (4) and a gas-liquid separator (6);
the top of the continuous stirring kettle (3) is provided with a raw material inlet for feeding polymer-containing oil sludge, the continuous stirring kettle (3) is introduced with a polymer-containing oil sludge raw material and subcritical water (2), an outlet of the continuous stirring kettle (3) is communicated with an inlet of the supercritical water gasification device (4), the supercritical water gasification device (4) is introduced with supercritical water (5), an upper outlet of the supercritical water gasification device (4) is connected with an inlet of a gas-liquid separator (6), and an outlet of the gas-liquid separator (6) discharges a gas product (7) and a liquid product (8).
2. The apparatus for treating polymer-containing sludge based on supercritical water gasification process according to claim 1, wherein a screw feeding device (1) is connected to a raw material inlet at the top of the continuous stirred tank (3), and the polymer-containing sludge raw material is fed into the continuous stirred tank (3) through the screw feeding device (1).
3. The polymer-containing sludge treatment device based on supercritical water gasification process according to claim 1, wherein the inlet of subcritical water (2) is opened at the side of continuous stirred tank (3).
4. The treatment method of the polymer-containing sludge treatment device based on the supercritical water gasification process according to claim 1, characterized by comprising the following steps:
feeding a polymer-containing oil sludge raw material into a continuous stirring kettle (3), and performing subcritical water liquefaction reaction with subcritical water (2) to obtain a mixture A;
secondly, the mixture A enters a supercritical water gasification device (4) and carries out supercritical water gasification reaction with supercritical water (5) in the supercritical water gasification device (4) to obtain a mixture B;
and step three, enabling the mixture B to enter a gas-liquid separator (6), and realizing the separation of a gas product (7) and a liquid product (8) in the gas-liquid separator (6).
5. The method for treating polymer-containing sludge treatment equipment based on supercritical water gasification process according to claim 4, wherein in the first step, the polymer-containing sludge raw material is fed into the continuous stirring kettle (3) through the screw feeding device (1).
6. The treatment method of polymer-containing oil sludge treatment device based on supercritical water gasification process according to claim 4, wherein in the first step, the continuous stirring kettle (3) is controlled to be 13-20 MPa, the temperature is 150-370 ℃, and the high-torque magnetic driving stirring speed is 1000-1800 rpm.
7. The treatment method of claim 4, wherein in the first step, the mass ratio of the polymer-containing oil sludge to the subcritical water is 1: (1-5).
8. The treatment method of polymer-containing oil sludge treatment equipment based on supercritical water gasification process according to claim 4, wherein in the second step, the temperature of the supercritical water (5) is 500-750 ℃, and the pressure is 23-25 MPa.
9. The method for treating polymer-containing sludge treatment equipment based on supercritical water gasification process according to claim 4, wherein in the second step, the feeding mass ratio of the mixture A to the supercritical water is 1: (1-5).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892413A (en) * | 2021-01-21 | 2021-06-04 | 华东理工大学 | Method for improving oil product spray gasification efficiency |
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| WO2015132922A1 (en) * | 2014-03-05 | 2015-09-11 | 中国電力株式会社 | Apparatus for gasification with supercritical fluid |
| CN106010662A (en) * | 2016-06-08 | 2016-10-12 | 湖南大学 | Two-step organic waste treatment system and method based on supercritical/subcritical water technology |
| CN106316023A (en) * | 2016-09-21 | 2017-01-11 | 重庆赛迪热工环保工程技术有限公司 | Supercritical water gasification and recycling method and apparatus for steel mill high-oil-content iron-containing sludge |
| WO2018076093A1 (en) * | 2016-10-27 | 2018-05-03 | The University Of Western Ontario | Hydrothermal liquefaction co-processing of wastewater sludge and lignocellulosic biomass for co-production of bio-gas and bio-oils |
| CN110272762A (en) * | 2019-07-11 | 2019-09-24 | 深圳大学 | A kind of CO2With Asia/supercritical water synergistic effect gasification sludge method |
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2020
- 2020-07-20 CN CN202010700581.5A patent/CN111792807A/en active Pending
Patent Citations (5)
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| WO2015132922A1 (en) * | 2014-03-05 | 2015-09-11 | 中国電力株式会社 | Apparatus for gasification with supercritical fluid |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112892413B (en) * | 2021-01-21 | 2022-06-24 | 华东理工大学 | Method for improving oil product spray gasification efficiency |
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