CN113292217A - Method for treating waste oil sludge through microwave heating - Google Patents
Method for treating waste oil sludge through microwave heating Download PDFInfo
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- CN113292217A CN113292217A CN202110747628.8A CN202110747628A CN113292217A CN 113292217 A CN113292217 A CN 113292217A CN 202110747628 A CN202110747628 A CN 202110747628A CN 113292217 A CN113292217 A CN 113292217A
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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
- C02F11/10—Treatment of sludge; Devices therefor by pyrolysis
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
- B01J19/126—Microwaves
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
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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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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Abstract
The invention discloses a method for treating waste oil sludge by microwave heating, belonging to the field of waste oil sludge recovery treatment, wherein the waste oil sludge is divided into three parts, different radiation media are respectively added, and a foaming agent is added into middle-layer waste oil sludge; performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively; the waste oil sludge is carbonized and pyrolyzed into a gas phase part and a solid phase part, and the gas phase part and the solid phase part are respectively recycled. The waste oil sludge is split from the whole to the part, and then radiation media with different components are respectively added, and the multi-angle directional microwave radiation irradiation is carried out, so that the whole waste oil sludge is uniformly heated, the whole energy consumption is low, and the method has the advantages of good operability, low cost, safe and harmless treatment products and the like.
Description
Technical Field
The invention relates to the field of waste oil sludge recovery treatment, in particular to a method for treating waste oil sludge by microwave heating.
Background
Along with the increase of the demand of economic development on oil, the amount of waste oil sludge generated in the oil field exploitation process is continuously increased, and the waste oil sludge causes great harm to the environment. These waste oil sludge contains about 10-35% crude oil, 20-30% water and 25-60% silt. At present, the treatment method of waste oil sludge mainly comprises a reinjection method (injecting into an annular space or a safe stratum), an incineration method, a heat treatment method (a distillation method), a solvent extraction method, landfill and biodegradation, the useful substances in the waste oil sludge are burnt by direct incineration, resources are wasted, a large amount of carbon dioxide is generated to promote the occurrence of greenhouse effect, and other treatment methods can waste petroleum resources, cannot treat the waste oil sludge thoroughly, occupy land and cause secondary pollution.
The heat treatment method is an effective oil sludge treatment method, can treat oil sludge harmlessly, can effectively recover oil resources in the oil sludge, does not produce secondary pollution, and realizes the recycling of the oil sludge. The existing heat treatment methods mainly include a conventional heating method and a microwave distillation method. The traditional heating method is mainly an electromagnetic oven dry distillation method, and the method is characterized in that an electromagnetic oven is adopted to heat oil sludge or drill cuttings, and light components are obtained through distillation and pyrolysis under the high-temperature condition, so that the aim of harmless treatment is fulfilled. The electromagnetic oven works by utilizing the electromagnetic induction eddy current heating principle, when the bottom of an iron pan is placed on the oven surface, the pan cuts alternating magnetic lines of force to generate alternating current (eddy current) at the metal part at the bottom of the pan, the eddy current enables iron molecules of the pan to move randomly at a high speed, and the molecules collide and rub with each other to generate heat energy to enable the appliance to automatically generate heat at a high speed; from the perspective of energy conversion, the energy conversion process of the induction cooker is as follows: electric energy-electromagnetic energy-heat energy of the pot; the pan then heats the sludge or cuttings waste by conducting heat to it, which inevitably results in a reduction in heating efficiency. The microwave distillation treatment method is characterized in that water in oil-containing waste is used as a wave absorbing medium in a microwave oven, and oil in rock debris is distilled out by heating waste oil sludge; the method has the defects that 1, the heavy oil cannot be completely treated due to low heating temperature (about 200 ℃), no harmless treatment is given to the polymer additive, and the oil content after treatment still reaches 2.2 percent; 2. the energy utilization efficiency is low, and the self energy in the oil sludge is not utilized, so that the resource waste is caused. And because the discarded fatlute has higher viscosity, be difficult for carrying out thermal conduction and material transport, even microwave heating also often because fatlute is heated unevenly, can't guarantee the whole homogeneous processing of fatlute, lead to partly heat excessively or partly heat not enough and cause energy and raw materials extravagant.
Disclosure of Invention
The invention aims to provide a method for treating waste oil sludge by microwave heating, which solves the problems in the prior art, and has the advantages of uniform heating of the whole waste oil sludge, low energy consumption, good operability, low cost, safe and harmless treatment products and the like.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a method for treating waste oil sludge by microwave heating, which comprises the following steps:
dividing the waste oil sludge into three parts, namely waste oil sludge a, waste oil sludge b and waste oil sludge c, respectively adding a radiation medium a, a radiation medium b and a radiation medium c, adding a foaming agent into the waste oil sludge b, and respectively and uniformly mixing;
sequentially adding the waste oil sludge a, the waste oil sludge b and the waste oil sludge c into a treatment container, and performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively;
firstly performing microwave radiation for 1-3min, heating the waste oil sludge to 250 ℃ for 150-.
Further, the radiation medium a comprises ferrite powder, silicon carbide fibers and a palm shell in a mass ratio of 1:1: 2.
Further, the radiation medium b comprises nano titanium dioxide, peanut shells and corn stalks in a mass ratio of 1:2: 3.
Further, the radiation medium c comprises tin dioctoate, bismuth decanoate, silicon carbide and activated carbon in a mass ratio of 0.5:0.5:3: 5.
Further, the adding amount of the radiation medium a, the radiation medium b and the radiation medium c is 0.5-1.5%, 1-2% and 1.3-1.8% of the mass of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c respectively.
Further, the foaming agent comprises one or more of azodicarbonamide, trihydrazinotriazine, p-toluenesulfonamide urea or 3-morphinyl-1, 2,3, 4-thiatriazole.
Further, the mass ratio of the waste oil sludge a to the waste oil sludge b to the waste oil sludge c is 1-2:2-3: 3-5.
Further, the number of the microwave radiations is 2, 4 or 6, and the microwave radiations are divided into two groups to be respectively radiated from the upper side and the lower side of the processing container. Further, the number of the microwave radiations is preferably 4 or 6, and more preferably 4; the 4 microwave radiation devices are respectively arranged at the upper left, the upper right, the lower left and the lower right of the treatment container, and the microwave emission angles of the two microwave radiation devices above the treatment container form an angle of 10-45 degrees, preferably 20-30 degrees, more preferably 30 degrees, so that 4 directional microwave beams are intersected in the middle of the waste oil sludge, and the whole body is uniformly heated; the radiation area of the single microwave radiation is at least 3/5 of the surface area of the processing container so as to enhance the radiation coverage of the waste oil sludge.
Further, the frequency of the microwave radiation is 900MHz-3500 MHz. Furthermore, the frequency of the microwave radiation above the processing container is at least 10-300%, preferably 100-200%, above the lower part, for example, the frequency of the microwave radiation above is 3000MHz, and the frequency below should be 1000-1500 MHz; the microwave radiation with different frequencies has different penetration efficiency and heating intensity, and a large number of experiments show that the microwave radiation frequency can better improve the heat absorption speed of the waste oil sludge, shorten the time of preheating, drying and thermal decomposition, balance the overall heating uniformity, further reduce the energy consumption and improve the utilization rate of raw materials.
Further, the power of the microwave radiation is 100W-1000W.
The invention discloses the following technical effects:
according to the invention, the waste oil sludge is divided into three parts, different radiation media are respectively added, microwaves penetrate through solid particles and are gathered in the particles to form a temperature gradient from inside to outside, volatilization of volatile components is facilitated, the oil sludge is uniformly heated, the integral uniform treatment of the oil sludge is ensured, the waste of energy and raw materials caused by partial overheating or partial insufficient heating is overcome, and the utilization rate of the raw materials is improved.
The radiation medium is prepared by mixing organic matters and inorganic matters and adding natural biological materials, so that the cost can be effectively reduced, and the palm shells, the peanut shells, the corn stalks and the activated carbon are porous substances, so that the effect of the traditional radiation medium can be enhanced and the traditional radiation medium can be exerted in a synergistic manner; the tin dioctoate and the bismuth decanoate have the functions of catalyzing and absorbing microwaves at the same time, and the inventor finds that the tin dioctoate and the bismuth decanoate have strong property which tends to be uniformly distributed in the oil sludge, and by means of the property, the tin dioctoate and the bismuth decanoate are added into the uppermost waste oil sludge c and are distributed in the whole waste oil sludge, and the porous substance in the radiation medium can further enhance the property, so that the tin dioctoate and the bismuth decanoate are uniformly distributed in the waste oil sludge, and the integral heating degree of the waste oil sludge is improved. The foaming agent expands under the condition of heating and generates aerated inclusion to enable the waste oil sludge to expand, the problems that heat is difficult to transfer and substances are difficult to transport due to overhigh viscosity of the oil sludge are solved, substance transportation of the waste oil sludge is enhanced, the middle layer which is poor in microwave radiation is likely to have better heating condition and substance transportation environment, gas generated by thermal decomposition of the oil sludge and the aerated inclusion generated by the foaming agent can promote creeping of the upper layer of the oil sludge, and heat transfer and substance transportation are accelerated.
The waste oil sludge is split from the whole to the part, and then radiation media with different components are respectively added, and the multi-angle directional microwave radiation irradiation is carried out, so that the whole waste oil sludge is uniformly heated, the whole energy consumption is low, and the method has the advantages of good operability, low cost, safe and harmless treatment products and the like.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Further, for numerical ranges in this disclosure, it is understood that each intervening value, between the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
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. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. The description and examples are intended to be illustrative only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
In the following examples, the temperature of the waste sludge is referred to as the apparent temperature of the waste sludge and may be measured by a contact thermometer or a non-contact thermometer, such as an infrared thermometer.
Example 1
A method for treating waste oil sludge by microwave heating comprises the following steps:
dividing the waste oil sludge into three parts of waste oil sludge a, waste oil sludge b and waste oil sludge c according to the mass ratio of 2:2.5:4, respectively adding a radiation medium a, a radiation medium b and a radiation medium c, adding a foaming agent into the waste oil sludge b, and respectively and uniformly mixing;
sequentially adding waste oil sludge a, waste oil sludge b and waste oil sludge c into a treatment container, and performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively;
firstly performing microwave radiation for 2min to heat the waste oil sludge to 200 ℃, maintaining the temperature for 4min, separating water vapor, filling nitrogen, continuing the microwave radiation for 7min to heat the waste oil sludge to 550 ℃, maintaining the temperature for 10min, carbonizing and pyrolyzing the waste oil sludge into a gas phase part and a solid phase part, and respectively recycling.
The radiation medium a comprises ferrite powder, silicon carbide fiber and a palm shell in a mass ratio of 1:1: 2; the radiation medium b comprises nano titanium dioxide, peanut shells and corn straws in a mass ratio of 1:2: 3; the radiation medium c comprises tin dioctoate, bismuth decanoate, silicon carbide and activated carbon in a mass ratio of 0.5:0.5:3: 5.
The adding amount of the radiation medium a, the radiation medium b and the radiation medium c is 1 percent, 1.5 percent and 1.5 percent of the mass of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c respectively.
The foaming agent comprises azodicarbonamide and trihydrazinotriazine with equal mass, and the using amount of the foaming agent is 2% of the mass of the waste oil sludge b.
The number of microwave radiation is 4; the 4 microwave radiation devices are respectively arranged at the upper left, the upper right, the lower left and the lower right of the processing container, the microwave emission angles of the two microwave radiation devices above form an angle of 30 degrees, and the radiation area of single microwave radiation is 3/5 of the surface area of the processing container. The frequency of the microwave radiation above is 3000MHz and the frequency below is 1500 MHz.
In the heating process, when the temperature of the oil sludge is raised to 100 ℃, water vapor escapes, when the temperature is continuously raised to 250 ℃, water in the oil sludge is basically and completely evaporated, organic matters in the oil sludge are decomposed into micromolecular oil gas and asphalt, the pyrolysis process is continued to 550 ℃ for 10min, the organic matters including the asphalt are basically and completely decomposed to obtain pyrolysis oil gas and solid waste residues, the obtained pyrolysis oil gas mainly contains low-carbon alkane, the total proportion of ethylene, propylene and butylene in the pyrolysis oil gas is up to 72.53% through further experimental determination, the content of the residual organic matters in the solid waste residues is less than 1%, the utilization rate of the whole raw materials is up to 99.34%, and the generation of harmful substances such as dioxin and the like is not monitored in the whole process.
Example 2
A method for treating waste oil sludge by microwave heating comprises the following steps:
dividing the waste oil sludge into three parts of waste oil sludge a, waste oil sludge b and waste oil sludge c according to the mass ratio of 1:3:3, respectively adding a radiation medium a, a radiation medium b and a radiation medium c, adding a foaming agent into the waste oil sludge b, and respectively and uniformly mixing;
sequentially adding waste oil sludge a, waste oil sludge b and waste oil sludge c into a treatment container, and performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively;
firstly performing microwave radiation for 3min to heat the waste oil sludge to 150 ℃, maintaining the temperature for 5min, separating water vapor, filling nitrogen, continuing the microwave radiation for 5min to heat the waste oil sludge to 600 ℃, maintaining the temperature for 5min, carbonizing and pyrolyzing the waste oil sludge into a gas phase part and a solid phase part, and respectively recycling.
The radiation medium a comprises ferrite powder, silicon carbide fiber and a palm shell in a mass ratio of 1:1: 2; the radiation medium b comprises nano titanium dioxide, peanut shells and corn straws in a mass ratio of 1:2: 3; the radiation medium c comprises tin dioctoate, bismuth decanoate, silicon carbide and activated carbon in a mass ratio of 0.5:0.5:3: 5.
The adding amount of the radiation medium a, the radiation medium b and the radiation medium c is respectively 1.5 percent, 1 percent and 1.8 percent of the mass of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c.
The foaming agent is p-toluenesulfonamide urea, and the using amount of the foaming agent is 1 percent of the mass of the waste oil sludge b.
The number of the microwave radiation devices is 4, the microwave radiation devices are respectively arranged at the upper left, the upper right, the lower left and the lower right of the processing container, the microwave emission angles of the two microwave radiation devices above the microwave radiation devices form an angle of 25 degrees, and the radiation area of the single microwave radiation device is 7/10 of the surface area of the processing container. The frequency of the microwave radiation above is 3000MHz and the frequency below is 1000 MHz.
The obtained cracked oil gas mainly contains low-carbon alkane, and further experimental determination shows that the total proportion of ethylene, propylene and butylene in the cracked oil gas is up to 68.19%, the content of residual organic matters in solid waste residues is less than 1%, the overall raw material utilization rate is up to 98.67%, and the generation of harmful substances such as dioxin and the like is not monitored in the whole process.
Example 3
A method for treating waste oil sludge by microwave heating comprises the following steps:
dividing the waste oil sludge into three parts of waste oil sludge a, waste oil sludge b and waste oil sludge c according to the mass ratio of 2:2:5, respectively adding a radiation medium a, a radiation medium b and a radiation medium c, adding a foaming agent into the waste oil sludge b, and respectively and uniformly mixing;
sequentially adding waste oil sludge a, waste oil sludge b and waste oil sludge c into a treatment container, and performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively;
firstly performing microwave radiation for 1min to heat the waste oil sludge to 250 ℃, maintaining the temperature for 3min, separating water vapor, filling nitrogen, continuing the microwave radiation for 9min to heat the waste oil sludge to 450 ℃, maintaining the temperature for 15min, carbonizing and pyrolyzing the waste oil sludge into a gas phase part and a solid phase part, and respectively recycling.
The radiation medium a comprises ferrite powder, silicon carbide fiber and a palm shell in a mass ratio of 1:1: 2; the radiation medium b comprises nano titanium dioxide, peanut shells and corn straws in a mass ratio of 1:2: 3; the radiation medium c comprises tin dioctoate, bismuth decanoate, silicon carbide and activated carbon in a mass ratio of 0.5:0.5:3: 5.
The adding amount of the radiation medium a, the radiation medium b and the radiation medium c is respectively 0.5 percent, 2 percent and 1.3 percent of the mass of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c.
The foaming agent comprises azodicarbonamide and 3-morphinyl-1, 2,3, 4-thiatriazole with equal mass, and the dosage of the foaming agent is 3 percent of the mass of the waste oil sludge b.
The number of the microwave radiations is 2, the microwaves are respectively arranged at the upper left and the lower right of the treatment container, the microwave emission angle of the microwave radiations above and below is 10 degrees, the radiation area of a single microwave radiation is 11/10 degrees of the surface area of the treatment container, the frequency of the microwave radiation above is 3500MHz, and the frequency below is 900 MHz.
The obtained cracked oil gas mainly contains low-carbon alkane, and further experimental determination shows that the total proportion of ethylene, propylene and butylene in the cracked oil gas is 62.81%, the content of residual organic matters in solid waste residues is less than 2%, the overall raw material utilization rate is 96.75%, and the generation of harmful substances such as dioxin and the like is not monitored in the whole process.
Comparative example 1
The difference from the example 1 is that the waste oil sludge is not divided into three parts, and the radiation medium and the foaming agent are all mixed and added; the obtained cracked oil gas mainly contains low-carbon alkane, and through further experimental determination, the total proportion of ethylene, propylene and butylene in the cracked oil gas is 46.31 percent, the content of residual organic matters in solid waste residues is 13 percent, the overall raw material utilization rate is 80.34 percent, and the generation of harmful substances such as dioxin and the like is not monitored in the whole process.
Comparative example 2
The difference from example 1 is that no blowing agent was added; the obtained cracked oil gas mainly contains low-carbon alkane, and further experimental determination shows that the total proportion of ethylene, propylene and butylene in the cracked oil gas is 52.67%, the content of residual organic matters in solid waste residues is 5%, the overall raw material utilization rate is 86.13%, and the generation of harmful substances such as dioxin is not monitored in the whole process.
Comparative example 3
The difference from the embodiment 1 is that three parts of waste oil sludge are added into a mixture of radiation media a, b and c, and the radiation media and the foaming agent are all mixed and added; the obtained cracked oil gas mainly contains low-carbon alkane, and further experimental determination shows that the total proportion of ethylene, propylene and butylene in the cracked oil gas is 57.69%, the content of residual organic matters in solid waste residues is 7%, the overall raw material utilization rate is 89.57%, and the generation of harmful substances such as dioxin is not monitored in the whole process.
Comparative example 4
The difference from the embodiment 1 is that the number of the microwave radiation is 1, the microwave radiation is positioned in the middle of the upper part of the processing container, the direction is downward, and the radiation area is 3/2 of the apparent area of the processing container; the total proportion of ethylene, propylene and butylene in the obtained cracked oil gas is 37.69%, the content of residual organic matters in the solid waste residue is 37%, the utilization rate of the whole raw materials is 52.64%, and the generation of harmful substances such as dioxin and the like is monitored in the later stage of the process.
Comparative example 5
The difference from example 1 is that the number of microwave radiations is 4; the 4 microwave radiation devices are respectively arranged in the upper center of the left half part, the upper center of the right half part, the lower center of the left half part and the lower center of the right half part of the treatment container, the microwave emission angle is 0, and the radiation area of single microwave radiation is 1/2 of the surface area of the treatment container. The frequency of the microwave radiation at the upper part is 3000MHz, and the frequency at the lower part is 1500 MHz; the obtained cracked oil gas mainly contains low-carbon alkane, and through further experimental determination, the total proportion of ethylene, propylene and butylene in the cracked oil gas is 41.35%, the content of residual organic matters in solid waste residues is 4%, the overall raw material utilization rate is 93.46%, and the generation of harmful substances such as dioxin is not monitored in the whole process.
Comparative example 6
The difference from the embodiment 1 is that the radiation media are radiation media a; the total proportion of ethylene, propylene and butylene in the obtained cracked oil gas is 58.34%, the content of residual organic matters in the solid waste residue is 5%, the utilization rate of the whole raw material is 91.52%, and the generation of harmful substances such as dioxin and the like is not monitored in the whole process.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (10)
1. A method for treating waste oil sludge by microwave heating is characterized by comprising the following steps:
dividing the waste oil sludge into three parts, namely waste oil sludge a, waste oil sludge b and waste oil sludge c, respectively adding a radiation medium a, a radiation medium b and a radiation medium c, adding a foaming agent into the waste oil sludge b, and respectively and uniformly mixing;
sequentially adding the waste oil sludge a, the waste oil sludge b and the waste oil sludge c into a treatment container, and performing microwave radiation, wherein the microwave radiation adopts directional microwaves and is performed from the upper part and the lower part of the treatment container respectively;
firstly performing microwave radiation for 1-3min, heating the waste oil sludge to 250 ℃ for 150-.
2. The method according to claim 1, wherein the radiation medium a comprises ferrite powder, silicon carbide fiber and palm shell in a mass ratio of 1:1: 2.
3. The method of claim 1, wherein the radiant medium b comprises nano titanium dioxide, peanut shells and corn stover in a mass ratio of 1:2: 3.
4. The method according to claim 1, wherein the radiant medium c comprises tin dioctoate, bismuth decanoate, silicon carbide and activated carbon in a mass ratio of 0.5:0.5:3: 5.
5. The method of claim 1, wherein the addition amounts of the radiant medium a, the radiant medium b and the radiant medium c are 0.5-1.5%, 1-2% and 1.3-1.8% of the mass of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c, respectively.
6. The method of claim 1, wherein the blowing agent comprises one or more of azodicarbonamide, trihydrazinotriazine, p-toluenesulfonamido urea, or 3-morphinyl-1, 2,3, 4-thiatriazole.
7. The method according to claim 1, wherein the mass ratio of the waste oil sludge a, the waste oil sludge b and the waste oil sludge c is 1-2:2-3: 3-5.
8. The method according to claim 1, wherein the number of the microwave radiations is 2, 4 or 6, and the microwave radiations are performed from above and below the treatment container, respectively, in two groups.
9. The method of claim 1, wherein the microwave radiation has a frequency of 900MHz to 3500 MHz.
10. The method according to claim 1, wherein the microwave radiation has a power of 100W-1000W.
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| CN116062960A (en) * | 2023-02-24 | 2023-05-05 | 辽宁石油化工大学 | Method for preparing oil sludge product based on pyrolysis of nano metal oxide |
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