CN116947083A - Method for extracting barium sulfate by oil-based rock debris air flow grinding method - Google Patents
Method for extracting barium sulfate by oil-based rock debris air flow grinding method Download PDFInfo
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- CN116947083A CN116947083A CN202310972292.4A CN202310972292A CN116947083A CN 116947083 A CN116947083 A CN 116947083A CN 202310972292 A CN202310972292 A CN 202310972292A CN 116947083 A CN116947083 A CN 116947083A
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- oil
- barium sulfate
- air flow
- powder
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- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 title claims abstract description 85
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000011435 rock Substances 0.000 title claims abstract description 26
- 238000000227 grinding Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 80
- 239000002245 particle Substances 0.000 claims abstract description 30
- 239000010802 sludge Substances 0.000 claims abstract description 25
- 239000002893 slag Substances 0.000 claims abstract description 20
- 238000000197 pyrolysis Methods 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract description 5
- 238000002485 combustion reaction Methods 0.000 claims abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 38
- 238000001035 drying Methods 0.000 claims description 7
- 238000010902 jet-milling Methods 0.000 claims 7
- 238000003801 milling Methods 0.000 claims 6
- 238000005520 cutting process Methods 0.000 claims 5
- 238000005336 cracking Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 238000005303 weighing Methods 0.000 description 8
- 239000012535 impurity Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000000576 coating method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
- C01F11/462—Sulfates of Sr or Ba
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/02—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of bagasse, megasse or the like
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
Abstract
The invention discloses a method for extracting barium sulfate by oil-based rock debris air flow grinding, which comprises the following steps: s1, taking dangerous waste oil-based rock scraps in shale gas exploitation, and performing anaerobic pyrolysis separation to obtain pyrolysis oil and oil sludge dry slag; s2, sending the oil sludge dry slag into an incinerator for aerobic incineration, collecting the powder after combustion and metering the powder as A; s3, feeding the powder into a feeding box of an air mill; s4, crushing the powder in an air flow mill, wherein the flow speed is 200-320 m/S, and the discharge of a discharge port is controlled to be 425-800 meshes; s5, stopping the air flow mill when the discharge amount from the air flow mill is 50-80% of the discharge amount A, and collecting powder particles remained in the air flow mill to obtain a barium sulfate product. The invention not only solves the environmental resource pressure, but also has higher yield and purity of the obtained barium sulfate.
Description
Technical Field
The invention relates to the field of comprehensive utilization of solid wastes, in particular to a method for extracting barium sulfate by an oil-based rock debris air flow grinding method.
Background
The shale gas exploitation technology in China is mature, the exploitation amount is continuously increased, in the shale gas well drilling process, barium sulfate is used as a main component of a drilling mud weighting agent, the demand amount is continuously increased, after the weighting agent barium sulfate (the grade is more than 80 percent) is added, the weighting agent barium sulfate is mixed with rock scraps, well cementation oil and the like to form dangerous waste oil-based rock scraps, and low-grade (the grade is 15-40 percent) barium sulfate in the dangerous waste oil-based rock scraps is lost along with dry slag as solid waste.
On the other hand, along with the development of science and technology, the barium sulfate has wider application, can be used for replacing the original raw materials with higher price in the coating and the paint, is used for filling materials in the plastic industry and the rubber industry and is used for filling materials in the paper industry, thereby continuously increasing the demand on the barium sulfate and further increasing the resource and environmental burden of the exploitation of the barite ore.
The traditional dangerous waste oil bedrock scraps treatment method comprises the steps of landfill method, thermal desorption treatment, incineration treatment, biodegradation treatment, stratum reinjection and the like, and the stacked oil-based bedrock scraps occupy a large area of land in the treatment process, so that the treatment cost is high, the recycling degree is low, and the risk of secondary pollution exists.
Disclosure of Invention
In order to solve the technical problems, the invention provides the method for extracting the barium sulfate by the oil-based rock debris air flow grinding method, which not only solves the environmental resource pressure, but also has higher yield and purity of the obtained barium sulfate.
A method for extracting barium sulfate by oil-based rock debris air flow grinding method comprises the following steps:
s1, taking dangerous waste oil-based rock scraps in shale gas exploitation, and performing anaerobic pyrolysis separation to obtain pyrolysis oil and oil sludge dry slag;
s2, sending the oil sludge dry slag into an incinerator for aerobic incineration, collecting the powder after combustion and metering the powder as A;
s3, feeding the powder into a feeding box of an air mill;
s4, crushing the powder in an air flow mill, wherein the flow speed is 200-320 m/S, and the discharge of a discharge hole is controlled to be 425-800 meshes;
s5, stopping the air flow mill when the discharge amount from the air flow mill is 50-80% of the discharge amount A, and collecting powder particles remained in the air flow mill to obtain a barium sulfate product.
Preferably, in the step S1, the anaerobic cleavage temperature is 430 ℃.
Preferably, in S2, the aerobic incineration temperature is 700 ℃ to 800 ℃.
Preferably, in the step S4, the flow speed is 280m/S, and the discharge of the discharge port is controlled to be 625 meshes.
Preferably, in the step S5, the air flow mill is stopped when the discharge amount from the air flow mill is 70 to 75% of the discharge amount a.
Preferably, the medium of the jet mill is air.
Preferably, the medium of the jet mill is superheated steam, and the temperature of the superheated steam is 200 ℃.
Preferably, the method for extracting the barium sulfate by the oil-based rock debris air flow grinding method further comprises the following steps of:
s6, placing the collected powder particles left in the jet mill in a steam chamber, and introducing ethanol steam for 3min;
and S7, drying the powder particles subjected to the ethanol treatment.
Preferably, in the step S6, the ethanol steam is introduced for 2-10min, the flow rate of the ethanol steam is 80-120g/min, and the temperature of the ethanol steam is 60-120 ℃.
Preferably, in the step S7, the drying temperature is 80 to 120 ℃.
Compared with the prior art, the invention has the following principle and beneficial effects:
according to the invention, the oil-based rock scraps are subjected to anaerobic pyrolysis to obtain the oil sludge dry slag, and then the oil sludge dry slag is subjected to aerobic incineration to form the barium sulfate with high yield and high purity by controlling the medium, the discharging granularity and the air flow grinding degree of the air flow mill.
Detailed Description
The invention will be further illustrated with reference to examples.
A method for extracting barium sulfate by oil-based rock debris air flow grinding method comprises the following steps:
s1, taking dangerous waste oil-based rock scraps in shale gas exploitation, and performing anaerobic pyrolysis separation to obtain pyrolysis oil and oil sludge dry slag;
s2, sending the oil sludge dry slag into an incinerator for aerobic incineration, collecting the powder after combustion and metering the powder as A;
s3, feeding the powder into a feeding box of an air mill;
s4, crushing the powder in an air flow mill, wherein the flow speed is 200-320 m/S, and the discharge of a discharge hole is controlled to be 425-800 meshes;
s5, stopping the air flow mill when the discharge amount from the air flow mill is 50-80% of the discharge amount A, and collecting powder particles remained in the air flow mill to obtain a barium sulfate product.
Further, the medium of the jet mill is air or superheated steam.
Further, when the medium of the jet mill is superheated steam, the method for extracting the barium sulfate by the oil-based rock debris jet mill further comprises the following steps:
s6, placing the collected powder particles left in the jet mill in a steam chamber, and introducing ethanol steam for 3min;
and S7, drying the powder particles subjected to the ethanol treatment.
Example 1
Taking dangerous waste oil-based rock debris in shale gas exploitation, performing anaerobic pyrolysis separation and extraction to obtain pyrolysis oil at a pyrolysis temperature of 430 ℃ (the temperature is too high, flash explosion possibly occurs, and the extraction is not thorough too low), and forming oil sludge dry slag by the oil-based rock debris after the pyrolysis oil is extracted, wherein the oil sludge dry slag is used in the following examples 2-5 and comparative example 1.
The content of barium sulfate in the oil sludge dry residue is detected to be 15 percent.
Example 2
S1, taking 100KG of the sludge dry residue of the example 1.
S2, sending the sludge dry slag into an incinerator for aerobic incineration, and controlling the temperature at 750 ℃.
S3, collecting the powder after the S2 aerobic incineration (the powder comprises the powder left after the incineration in the incinerator and the powder collected by the tail gas system) and weighing the powder into A, and sending the collected powder into a feeding box of the jet mill.
S4, crushing the powder in an air flow mill, wherein the medium is air, the flow speed is 280m/S, and the discharge of the discharge port is controlled to 625 meshes (20 um, namely, powder particles smaller than 20um are discharged from the discharge port).
S5, stopping the air flow mill when the discharge amount from the air flow mill is about 60% of the discharge amount A, collecting powder particles remained in the air flow mill, weighing the powder particles as B, and detecting the content of barium sulfate, wherein the result is shown in the table 1 below.
Example 3
S1, taking 100KG of the sludge dry residue of the example 1.
S2, sending the sludge dry slag into an incinerator for aerobic incineration, and controlling the temperature at 750 ℃.
S3, collecting the powder after the S2 aerobic incineration (the powder comprises the powder left after the incineration in the incinerator and the powder collected by the tail gas system) and weighing the powder into A, and sending the collected powder into a feeding box of the jet mill.
S4, crushing the powder in an air flow mill, wherein the medium is air, the flow speed is 280m/S, and the discharge of the discharge port is controlled to 625 meshes (20 um, namely, powder particles smaller than 20um are discharged from the discharge port).
S5, stopping the air flow mill when the discharge amount from the air flow mill is about 72% of the discharge amount A, collecting powder particles remained in the air flow mill, weighing the powder particles as B, and detecting the content of barium sulfate, wherein the result is shown in the table 1.
Example 4
S1, taking 100KG of the sludge dry residue of the example 1.
S2, sending the sludge dry slag into an incinerator for aerobic incineration, and controlling the temperature at 750 ℃.
S3, collecting the powder after the S2 aerobic incineration (the powder comprises the powder left after the incineration in the incinerator and the powder collected by the tail gas system) and weighing the powder into A, and sending the collected powder into a feeding box of the jet mill.
S4, crushing the powder in an air flow mill, wherein the medium is air, the flow speed is 280m/S, and the discharge of the discharge port is controlled to 625 meshes (20 um, namely, powder particles smaller than 20um are discharged from the discharge port).
S5, stopping the air flow mill when the discharge amount from the air flow mill is about 80% of the discharge amount A, collecting powder particles remained in the air flow mill, weighing the powder particles as B, and detecting the content of barium sulfate, wherein the result is shown in the table 1 below.
Comparative example 1
S1, taking 100KG of the sludge dry residue of the example 1.
S2, sending the sludge dry slag into an incinerator for aerobic incineration, and controlling the temperature at 750 ℃.
S3, collecting the powder after the S2 aerobic incineration (the powder comprises the powder left after the incineration in the incinerator and the powder collected by the tail gas system) and weighing the powder into A, and sending the collected powder into a feeding box of the jet mill.
S4, crushing the powder in an air flow mill, wherein the medium is air, the flow speed is 500m/S, and the discharge of the discharge port is controlled to 625 meshes (20 um, namely, powder particles smaller than 20um are discharged from the discharge port).
S5, stopping the air flow mill when the discharge amount from the air flow mill is about 72% of the discharge amount A, collecting powder particles remained in the air flow mill, weighing the powder particles as B, and detecting the content of barium sulfate, wherein the result is shown in the table 1.
TABLE 1
As can be seen from Table 1, in example 2, although the recovery rate was highest, the content of barium sulfate was low, only 66%, and this phenomenon was caused because, when the air flow mill was stopped, a part of impurities had not yet come out of the outlet of the air flow mill and remained in the pulverizing chamber and the circulation path of the air flow mill. Example 4 was high in content but low in yield, and this phenomenon was caused because a part of barium sulfate was already discharged from the discharge port of the jet mill before stopping the jet mill and mixed into impurities. The reason for the lower recovery and content of the comparative example is that the flow rate is larger, the friction and shearing force formed are larger, the barium sulfate is crushed together with the impurities before the air flow mill is stopped and discharged from the discharge port to cause low yield, and a larger part of the impurities is left in the crushing chamber and the circulation path without reaching the discharge degree.
Example 5
S1, taking 100KG of the sludge dry residue of the example 1.
S2, sending the sludge dry slag into an incinerator for aerobic incineration, and controlling the temperature at 750 ℃.
S3, collecting the powder after the S2 aerobic incineration (the powder comprises the powder left after the incineration in the incinerator and the powder collected by the tail gas system), and sending the collected powder into a charging box of the jet mill.
S4, crushing the powder in an air flow mill, wherein the medium is superheated steam, the temperature is 200 ℃, the flow speed is 280m/S, and the discharge of the discharge port is controlled to 625 meshes (20 um, namely, powder particles smaller than 20um are discharged from the discharge port).
S5, stopping the air flow mill when the discharge amount from the air flow mill is about 80% of the discharge amount A, and collecting powder particles remained in the air flow mill.
S6, placing the collected powder particles left in the jet mill in a steam chamber, and introducing ethanol steam (the ethanol steam is 87% (w/w) ethanol/water steam, namely, the ethanol steam contains 87wt% ethanol and 13wt% water) for 3min, wherein the flow rate of the ethanol steam is 100g/min, and the temperature is 80 ℃.
And S7, drying the powder particles subjected to ethanol treatment at a drying temperature of 100 ℃.
Example 6
The powder particles obtained in the step S5 in the example 3 and the powder particles obtained in the step S7 in the example 5 are taken, the fluidity of the powder particles is compared with the fluidity of the powder particles in the example 5, and the fluidity of the example 5 is obviously better than the fluidity of the example 3, which indicates that the product of the example 5 has lower agglomeration degree and better dispersion degree than the product of the example 3, and is more suitable for being used in the production of medicines, coatings and the like.
According to the invention, the oil-based rock scraps are subjected to anaerobic pyrolysis to obtain the oil sludge dry slag, and then the oil sludge dry slag is subjected to aerobic incineration to form the barium sulfate with high yield and high purity by controlling the medium, the discharging granularity and the air flow grinding degree of the air flow mill.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A method for extracting barium sulfate by oil-based rock debris air flow grinding method comprises the following steps:
s1, taking dangerous waste oil-based rock scraps in shale gas exploitation, and performing anaerobic pyrolysis separation to obtain pyrolysis oil and oil sludge dry slag;
s2, sending the oil sludge dry slag into an incinerator for aerobic incineration, collecting the powder after combustion and metering the powder as A;
s3, feeding the powder into a feeding box of an air mill;
s4, crushing the powder in an air flow mill, wherein the flow speed is 200-320 m/S, and the discharge of a discharge hole is controlled to be 425-800 meshes;
s5, stopping the air flow mill when the discharge amount from the air flow mill is 50-80% of the discharge amount A, and collecting powder particles remained in the air flow mill to obtain a barium sulfate product.
2. The method for extracting barium sulfate by oil-based cuttings jet milling according to claim 1, wherein in S1, the anaerobic cracking temperature is 430 ℃.
3. The method for extracting barium sulfate by oil-based rock debris air flow milling according to any one of claims 1 to 2, wherein in S2, the aerobic incineration temperature is 700 ℃ to 800 ℃.
4. The method for extracting barium sulfate by oil-based rock debris air flow grinding according to any one of claims 1-3, wherein in the step S4, the flow speed is 280m/S, and the discharge of a discharge hole is controlled at 625 meshes.
5. The method for extracting barium sulfate by air-stream milling of oil-based rock debris according to any one of claims 1 to 4, wherein in S5, the air-stream milling is stopped when the discharge amount from the air-stream milling is 70 to 75% of a.
6. The method for extracting barium sulfate by air-jet milling of oil-based rock debris according to any one of claims 1 to 5, wherein the medium of the air-jet milling is air.
7. The method for extracting barium sulfate by air-stream milling of oil-based rock debris according to any one of claims 1 to 5, wherein the medium of the air-stream milling is superheated steam with a temperature of 200 ℃.
8. The method for extracting barium sulfate by oil-based cuttings jet milling of claim 7, wherein the method for extracting barium sulfate by oil-based cuttings jet milling further comprises the steps of:
s6, placing the collected powder particles left in the jet mill in a steam chamber, and introducing ethanol steam for 3min;
and S7, drying the powder particles subjected to the ethanol treatment.
9. The method for extracting barium sulfate by oil-based cuttings jet milling according to claim 8, wherein in the step S6, the ethanol steam is introduced for 2-10min, the flow rate of the ethanol steam is 80-120g/min, and the temperature of the ethanol steam is 60-120 ℃.
10. The method for extracting barium sulfate by air-jet milling of oil-based cuttings according to any one of claims 8-9, wherein in S7, the drying temperature is 80-120 ℃.
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| CN202310972292.4A CN116947083A (en) | 2023-08-03 | 2023-08-03 | Method for extracting barium sulfate by oil-based rock debris air flow grinding method |
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