TWI567183B - A method for accelerating the processes in related to deep desulfurization and denitrigenation to obtain clean fuel oil with low sulfide & low nitrification, as well as to recover ionic liquid for reuse - Google Patents

Description

Method for accelerating desulfurization, denitrification and ionic liquid recovery and reuse of fuel oil

The invention relates to a method for purifying and purifying fuel oil, in particular to a method for accelerating desulfurization, denitrification and ionic liquid recovery and reuse of a fuel oil.

Due to the increased demand for fuel oils with low sulfur fuel oils, especially the European Union, which have a sulfur content below 10 PPM, research on deep desulfurization and denitrification of fuel oil has never stopped; however, the technologies still in use on the market today Most of them are traditional hydrodesulfurization technologies. The main reason is that the hydrodesulfurization technology is relatively mature and its processing energy is large. Therefore, it is still used by most refineries; but the existing traditional hydrodesulfurization The fuel oil produced by the technology after the so-called deep desulfurization process still has a sulfur content of about 50 PPM; and because of the demand for a deep desulfurization low sulfur fuel oil with a sulfur content below 10 PPM, the demand for the existing conventional In the case of hydrogen desulfurization technology, unless the catalyst reaction rate is increased, the working pressure is increased, and the reaction temperature is increased, the index of deep desulfurization cannot be achieved by the existing hydrodesulfurization technology; however, increasing the catalyst reaction rate means The need to develop new catalysts, increase work pressures, and increase operating temperatures mean that processes and equipment need to be re-engineered, and these measures will not only greatly improve operations. This, and will significantly improve the operational risk process; Furthermore, the residual catalyst after the deep desulfurization process is how to deal with a major problem; therefore, the current mainstream market has been rare to The traditional hydrodesulfurization technology is based on the technology of improvement, and is replaced by other different methods.

Depending on the nature of the technology used, these currently developed technologies can be broadly classified into the following five categories, which are briefly described as follows:

1. Solvent extraction desulfurization technology: in short, the specific solvent is used as the extractant, and the solvent can dissolve the sulfide but does not dissolve the characteristics of other hydrocarbons, and extract the sulfide in the fuel oil. method. The solvent used contains a polar solvent such as DMF, DMSO or MDEA. However, when it is used, the solvent is volatile and toxic, so it causes environmental pollution.

2. Oxidative desulfurization technology: the method uses hydrogen peroxide (H ₂ O ₂ ), ozone (Ozone-O ₃ ), ultraviolet (Ultraviolet), peroxyacid (Peroxyacid Peracid) and other strong oxides to fuel oil first. Oxidation, and separation and extraction with a polar solvent such as ACN (Acetonitrile), DMSO (dimethylsufoxide), DMF (N, N-dimethyformamide), etc., but these polar solvents are highly volatile and flammable, and are prone to fire and explosion.

3. Adsorption desulfurization technology: The main method is to add adsorbent in the desulfurization process to adsorb sulfide in the fuel, and then to achieve the purpose of desulfurization through hydrodesulfurization reaction; and the adsorbent containing sulfide is re-introduced In the regenerator, regeneration is obtained by oxidation; this method is similar to hydrodesulfurization, and one of the main problems is that the adsorption capacity of sulfides such as DBT (diphenylthiophene) in sulfides is poor, and it is technology. Blind spot.

4. Microbial desulfurization technology: The main method is to use microbial metabolism to produce desulfurase as a catalyst for catalytic desulfurization reaction to achieve the effect of desulfurization; this method can be operated under normal pressure and normal temperature environment, safety High is its advantage; but slow response, low efficiency, and desulfurization The high cost of strain cultivation is its disadvantage. In addition, there are still problems in how the culture technology including enzymes is commercialized, how the strains are mass-produced, etc., and these problems are urgently to be overcome. Therefore, in practice, such technologies are still difficult to be commercially applied in the market.

5. Desulfurization and denitrification with ionic liquid as extractant: This method is similar to the above method using solvent as extractant. The main difference is that this method uses non-toxic room temperature ionic liquid (Room Temperature Ionic) Liquid) is an extractant. To increase the reaction rate, an oxidizing agent such as hydrogen peroxide H ₂ O ₂ and a catalyst such as Ethanoic Acid (CH ₃ COOH), formic acid (HCOOH), or trifluoroacetic acid (CF ₃ ) are added after the extraction process. COOH) accelerates the desulfurization reaction; the mixed solution after the reaction is allowed to stand still, the upper liquid is the purified fuel oil, and the lower liquid is the reaction mixture of the ionic liquid, the oxidant, and the catalyst; The upper and lower materials are separated by a centrifuge, and the upper fuel oil is dehydrated and distilled to obtain low-sulfur fuel oil, and the lower material is reused as a back extract such as n-hexane (C ₆ H ₁₄ ) or N-methylpyrrolidone (NMP). Performing back extraction, extracting the aromatic compound (Aromatic compound) in the mixture, and then separating the ionic liquid from n-hexane (or NMP) by a centrifuge to complete the recovery and reuse of the ionic liquid. .

In the above method, it is apparent that the above-mentioned fifth method, that is, extraction with an ionic liquid and acceleration with an oxidation catalytic process to accelerate the extraction reaction, and then recovery of the ionic liquid by back extraction for reuse, is currently in the market. A preferred method of operation in the method under study, which is the safest and most capable of achieving deep desulfurization; however, the oxidant used in the process of adding an oxidant to increase the reaction rate, such as hydrogen peroxide (H ₂ O ₂ ), is high. In the case of concentration, when a water-soluble ionic liquid is encountered, a severe chemical reaction occurs, and an instantaneous high heat is generated to cause a hydrolysis reaction of the ionic liquid, which may cause the ionic liquid to be recovered and reused. Therefore, switching to an oxidant that does not cause a violent reaction and does not cause a hydrolytic reaction of the ionic liquid is a point that must be improved, because this problem causes the quality of the ionic liquid to be changed so that it can only be partially recovered or cannot be recycled; Since acetic acid, formic acid, or trifluoroacetic acid is chemically reacted with the extracted aromatic hydrocarbon compound to be more closely combined with the ionic liquid, it is necessary to back-extract the aromatic hydrocarbon by reverse extraction, such as n-hexane. Compounds to separate ionic liquids; these measures will incur additional operating costs; in addition, because hexane is toxic, it can accumulate in the human body, and long-term exposure to n-hexane can also cause neurotoxicity, which is the cause of this process. The cause of the technical bottleneck.

The present invention provides an improved method for the above-mentioned problems related to the extraction desulfurization technology by ionic liquid, so that the technology can be safer, the efficiency can be improved, and the operation cost can be further reduced. The technology will eventually be widely adopted, making the promotion and use of low-sulfur and low-nitrogen clean fuel oil more popular, in order to improve the environmental quality of our living environment and reduce the acid rain and air pollution caused by the earth. harm.

Therefore, the present inventors have actively researched and developed the practical experience of petroleum process design and development for many years, and have produced the present invention through actual experiments.

The invention provides a fuel oil accelerated by using ozone (Ozone-O3) as an oxidant instead of the conventional hydrogen peroxide (H ₂ O ₂ ) to accelerate the reaction in the desulfurization and denitrification extraction process without changing the material properties. Desulfurization, denitrification and ionic liquid recovery and reuse methods.

The invention provides an operation system for a short-distance distiller, which can recover low-sulfur, low-nitrogen fuel oil and recover ionic liquid under a low-temperature and low-pressure safe working environment. The invention has the characteristics of deep desulfurization and denitrification in a relatively low temperature and low pressure working environment, has the characteristics of no secondary pollution, is safer to operate, has relatively energy saving, and can save manufacturing cost.

In order to achieve the above, the present invention comprises a fuel oil extraction treatment step, a oxidation treatment step, a centrifugal separation treatment step, a fuel oil recovery treatment step, an ionic liquid recovery treatment step, and a common treatment step, wherein the fuel oil extraction treatment The step of mixing the fuel oil with the ionic liquid for performing an extraction program for desulfurization and denitrification; and the oxidation treatment step comprises: a. the oxidation treatment step uses a plurality of material transfer pumps and one includes an air compressor, a high pressure gas drainage and impurity screening program, an ozone generator ozone generator assembly, and a venturi gas-liquid mixer, and a mixed liquid buffer mixing tank including a gas discharger, and an exhaust gas a blower, an activated carbon adsorption tank, and an accelerated reaction tank; b. the ozone generator assembly manufactures ozone and stores the ozone for use, and extracts the fuel oil by a material transfer pump through the extraction step a mixture of fuel oil and ionic liquid is fed into the venturi gas-liquid mixer, and the venturi gas-liquid mixer is sucked into the compressed ozone to be mixed with And the mixture of the extracted fuel oil and the ionic liquid is gas-liquid mixed to form a bubbling type disturbance; c. after the gas and the liquid of the venturi gas-liquid mixer are mixed, the mixed liquid enters the The mixed liquid buffer mixing tank performs the reaction, and the ozone which escapes the mixed liquid rises to the gas discharger to accumulate, and the exhaust gas is pumped through the activated carbon adsorption tank to be discharged into the atmosphere, and enters the mixed liquid buffer mixing tank. After the mixture reaches the predetermined liquid level, the material transfer pump is started, and the mixed liquid is sent to the accelerated reaction tank to continue the reaction; And the centrifugal separation treatment step is used for high-speed separation of the mixed solution of the accelerated reaction tank in the oxidation treatment step by a high-speed centrifugal separator to form a mixture of an ionic liquid and an extract, and a fuel oil and a mixture of a small amount of extract; and the fuel oil recovery process takes short-range distillation as the core of the operation, and includes: a. the fuel oil recovery processing step includes a plurality of fuel oil recovery processing steps, a material transfer pump, and a fuel oil recovery process. Step preheater, a fuel oil recovery treatment step short path distiller, a fuel oil recovery treatment step, a thermal medium oil expansion tank, a fuel oil recovery treatment step, a thermal medium oil heating furnace, a plurality of fuel oil recovery processing steps, a thermal medium oil delivery Pump, a fuel oil receiving temporary storage tank, a fuel oil recovery processing step by-product receiving temporary storage tank, a fuel oil recovery processing step vacuum buffer tank, a fuel oil recovery processing step gas-liquid separator, a fuel oil recovery processing step vacuum pump , a refined oil storage tank, a fuel oil recovery processing step by-product storage tank; b. with fuel oil recovery processing steps The heat medium oil transfer pump of the heat medium oil heating furnace and the fuel oil recovery processing step transfers the heat medium oil through the fuel oil recovery processing step, the cylinder wall interlayer of the short path distiller, and the heating jacket layer of the fuel oil recovery processing step preheater And returning to the fuel oil recovery processing step of the heat medium oil heating furnace; and another heat medium oil is sent to the fuel oil recovery processing step of the heat medium oil expansion tank, and then looping back to the fuel oil recovery processing step a heat medium oil heating furnace until the fuel oil recovery processing step of the cylinder wall interlayer of the short path distiller and the heating jacket layer of the fuel oil recovery processing step preheater reach a predetermined working temperature, after which the heat medium oil heating furnace is further performed Intermittent start to maintain system operating temperature; c. Start fuel oil recovery process step vacuum pump through which fuel oil recovery The step buffer vacuum buffer tank and the fuel oil recovery processing step, the gas-liquid separator, the fuel oil recovery processing step short-range distiller, the fuel oil receiving temporary storage tank, and the fuel oil recovery processing step by-product receiving temporary storage tank for continuous pumping (vacuum) until the predetermined working pressure is reached, after which the vacuum pump performs intermittent pumping to hold the system at the preset working pressure; d. one of the fuel oil recovery processing steps, the material transfer pump, will centrifuge The mixture of the fuel oil and the small amount of the extract formed by the separation processing step is sent to the fuel oil recovery processing step, and is heated by the preheater, and then sent to the fuel oil recovery processing step short-distance distiller, and the fuel oil recovery processing step is provided inside the short-distance distiller. The squeegee applies a mixture of fuel oil and a small amount of extract to the surface of the cylinder wall of the short-distance distiller of the fuel oil recovery process to form a film, so that the film is preset by the cylinder wall interlayer of the short-distance distiller of the fuel oil recovery process step The temperature heats up and evaporates the fuel oil molecules, and allows the fuel oil molecules to rely on the molecular free path and the negative pressure of pumping With the aid of the action, the built-in condenser provided in the short-distance distiller of the fuel oil recovery processing step is used, and the fuel oil molecules attached to the surface of the condenser are cooled and condensed by the condenser to be condensed into a liquid state, and then enter the fuel oil. Receiving the temporary storage tank and feeding into the refined oil storage tank; e. a small amount of the extract of the fuel oil and a small amount of the extract is unable to reach the evaporation temperature due to the preset working temperature and working pressure to become a molecular shape Therefore, the extract of this part still appears in a liquid state and gradually falls into the fuel oil recovery process step below the short-range distiller, and then enters the fuel oil recovery process, the by-product accepts the temporary storage tank and is sent to the fuel oil recovery treatment. Step by-product storage tank; and the ionic liquid recovery processing step uses short-path distillation as the core of the operation, which comprises: a. The ionic liquid recovery processing step contains several ionic liquid recovery processing steps Material transfer pump, one ionic liquid recovery processing step preheater, one ionic liquid recovery processing step short path distiller, one ionic liquid recovery processing step, thermal medium oil expansion tank, one ionic liquid recovery processing step, heat medium oil heating furnace, several sets Ionic liquid recovery processing step, heat medium oil transfer pump, one ionic liquid receiving temporary storage tank, one ionic liquid recovery processing step, by-product receiving temporary storage tank, one ionic liquid recovery processing step, vacuum buffer tank, one ionic liquid recovery processing step, gas-liquid separation , an ionic liquid recovery processing step vacuum pump, an ionic liquid storage tank, an ionic liquid recovery processing step by-product storage tank; b. the ionic liquid recovery processing step, the heat medium oil heating furnace and the ionic liquid recovery processing step, the heat medium oil The transfer pump sends the heat medium oil through the cylinder wall interlayer of the short-flow distiller of the ionic liquid recovery processing step and the heating jacket layer of the pre-heater of the ionic liquid recovery processing step, and then returns to the ionic liquid recovery processing step. The oil heating furnace, and another heat medium oil is sent to the heat medium oil expansion tank of the ionic liquid recovery processing step, and then looped back to the ionic liquid recovery treatment a heat medium oil heating furnace until the cylinder wall interlayer of the short-flow distiller of the ionic liquid recovery processing step and the heating jacket layer of the ionic liquid recovery processing step preheater reach a predetermined working temperature, and then the heat medium oil heating furnace Intermittent start-up to maintain the system at a preset operating temperature; c. start the ionic liquid recovery process step vacuum pump, through the ionic liquid recovery process step vacuum buffer tank, ionic liquid recovery processing step gas-liquid separator to the ionic liquid Recycling process short-range distiller, the ionic liquid receiving temporary storage tank, the ionic liquid recovery processing step by-product receiving the temporary storage tank for vacuuming until the predetermined working pressure is reached, after which the vacuum pump intermittently starts pumping to maintain The system is at a preset working pressure; d. one of the ionic liquid recovery processing steps, the material transfer pump, and the mixture of the ionic liquid and the extract formed by the centrifugal separation processing step is sent to the ionic liquid recovery processing step for preheating Heating, and then feeding the ionic liquid recovery processing step short-range distiller, the ionic liquid Recycling process step The squeegee provided inside the short-distance distiller applies a mixture of ionic liquid and extract to the surface of the cylinder wall of the short-distance distiller of the ionic liquid recovery processing step to form a film of a predetermined thickness, so that the film is subjected to the ionic liquid Recycling process The predetermined temperature generated by the cylinder wall interlayer of the short-distance distiller heats and evaporates the ionic liquid molecules, and the molecules of the ionic liquid fly to the ionic liquid recovery processing step by means of the molecular free path and the pumping action of the system. One of the inside of the distiller is provided with a built-in condenser, and the ionic liquid molecules attached to the surface of the condenser are cooled by the condenser to be condensed into a liquid state, and then enter the ionic liquid to receive the temporary storage tank and send the ionic liquid storage. The trough; e. and the extract in the mixture of the ionic liquid and the extract does not reach the working condition due to the system operating temperature and the working pressure, and thus cannot be evaporated to become a molecular form, but still appears in a liquid state and gradually falls and falls into The ionic liquid recovery processing step is below the inside of the short-distance distiller, and then enters the ionic liquid recovery processing step by-product receiving temporary storage tank And feeding to the ionic liquid recovery processing step by-product storage tank; and in the common processing step, a cooling water tower generates cooling water for providing the cooling water to the fuel oil recovery processing step, the condenser of the short-path distiller, and the ionic liquid recovery treatment The condenser of the step short path distiller is used as condensed water. According to this, the reaction can be accelerated in the desulfurization and denitrification extraction treatment step for deep desulfurization and denitrification without changing the material properties of the extract, and the low sulfur and low nitrogen can be recovered in a low temperature and low pressure working environment. Clean fuel oil and recover ionic liquid for reuse.

The following is a detailed description of the various embodiments of the present invention.

10‧‧‧ fuel oil extraction process steps

11‧‧‧fuel oil blending heating tank

121/122/131/132‧‧‧ material transfer pump

14‧‧‧ room temperature ionic liquid storage tank

15‧‧‧Centrifugal extraction machine

16‧‧‧Combination buffer tank for fuel oil and extract

20‧‧‧Oxidation treatment steps

211/212/221/222‧‧‧ material transfer pump

23‧‧‧Ozone generator assembly

231‧‧‧Air compressor

232‧‧‧High-pressure gas filtration and impurity screening program

233‧‧Ozone generator

24‧‧‧ Venturi gas-liquid mixer

25‧‧‧ Mixture buffer mixing tank

251‧‧‧ gas discharger

26‧‧‧Exhaust air blower

27‧‧‧Active carbon adsorption tank

28‧‧‧Accelerated reaction tank

30‧‧‧ Centrifugal separation processing steps

311/312‧‧‧ material pump

32‧‧‧High speed centrifuge

33‧‧‧Storage tank for ionic liquid and extract mixture

34‧‧‧Storage tank for fuel oil and a small amount of extract mixture

40‧‧‧ Fuel oil recovery process steps

411/412/421/422/431/432‧‧‧ fuel oil recovery process step material transfer pump

44‧‧‧fuel oil recovery treatment step preheater

45‧‧‧Fuel oil recovery process short-range distiller

451‧‧‧Motor

452‧‧‧Reducer

453‧‧‧Lengjing

454‧‧‧fuel oil recovery process step material transfer pump

455‧‧‧ material storage tank

46‧‧‧Fuel oil recovery process step Thermal medium oil expansion tank

47‧‧‧Fuel oil recovery treatment step Heat medium oil heating furnace

481/482‧‧‧fuel oil recovery treatment step

491‧‧‧fuel oil receiving temporary storage tank

492‧‧‧ Fuel oil recovery treatment process by-product receiving temporary storage tank

493‧‧‧fuel oil recovery process vacuum buffer tank

494‧‧‧Fuel oil recovery process step gas-liquid separator

495‧‧‧fuel oil recovery process vacuum pump

496‧‧‧Stained oil storage tank

497‧‧‧fuel oil recovery process by-product storage tank

50‧‧‧Ionic liquid recovery processing steps

511/512/521/522/531/532‧‧‧ Ionic liquid recovery process step material transfer pump

54‧‧‧Ion liquid recovery processing step preheater

55‧‧‧ Ionic liquid recovery processing step short-range distiller

551‧‧‧Motor

552‧‧‧Reducer

553‧‧‧Lengjing

554‧‧‧Ionic liquid recovery processing step material transfer pump

555‧‧‧ material storage tank

56‧‧‧Ionic liquid recovery treatment step Thermal medium oil expansion tank

57‧‧‧Ionic liquid recovery treatment step heat medium oil heating furnace

581/582‧‧‧Ionic liquid recovery treatment step

591‧‧‧Ionic liquid receiving temporary storage tank

592‧‧‧Ionic liquid recovery treatment process by-product accepting temporary storage tank

593‧‧‧Ionic liquid recovery processing step vacuum buffer tank

594‧‧‧Ionic liquid recovery treatment step gas-liquid separator

595‧‧‧Ionic liquid recovery process vacuum pump

596‧‧‧ ionic liquid storage tank

597‧‧‧Ion solution recovery process by-product storage tank

60‧‧‧Common processing steps

61‧‧‧Cooling tower

62‧‧‧Ice water unit

631/632‧‧‧Ice water machine cooling water pump

641/642‧‧‧Cooling water recovery pump

651/652‧‧‧Cooling water pump

661/662‧‧‧Cooling water pump

1 is a schematic diagram of a fuel oil extraction treatment step, an oxidation treatment step, a centrifugal separation treatment step, and the like according to the present invention; FIG. 2 is a schematic diagram of a fuel oil recovery treatment step system of the present invention; and FIG. 3 is an ionic liquid recovery of the present invention. Process diagram of the processing steps; Figure 4 is a schematic diagram of the system of common processing steps of the present invention.

Referring to Figures 1 to 4, a preferred embodiment of the present invention comprises a Fuel Oil Extraction Process 10, an Oxidation Process 20, and a Centrifugation Process (High). The Speed Centrifuge Separation Process 30, a Fuel Oil Recovery Process 40, an Ionic Liquid Recovery Process 50, and a Utility Facility 60 are described in detail below.

Referring to FIG. 1, the fuel oil extraction treatment step 10 is for mixing the fuel oil with the ionic liquid to perform an extraction program for desulfurization and denitrification.

The fuel oil extraction treatment step 10 uses a fuel oil blending heating tank 11, a plurality of material transfer pumps 121/122/131/132, and an internal storage room temperature ionic liquid 1-octyl-3-methylimidazolium tetrafluoroborate. Room temperature ionic liquid storage tank 14 of salt (OMIM BF4) or 1-butyl-3-methylimidazolium iron tetrachloride (BMIMFeCl4), a centrifugal extractor, a fuel oil and an extract Mixing buffer tank 16.

When the fuel oil extraction processing step 10 is operated, the fuel oil is first heated to 70 ° C in the fuel oil blending heating tank 11; after that, the material transfer pump 121/122/131/132 is synchronously activated, and the fuel is fueled according to a preset feed ratio. The oil and ionic liquid are sent to the centrifugal extractor 15 for desulfurization and denitrification Taking the treatment step, the mixed liquid of the fuel oil and the ionic liquid which is contacted by the centrifugal extractor 15 enters the mixed solution buffer tank 16 to continue the extraction reaction.

The preset feed ratio of the fuel oil and the ionic liquid depends on the nature of the fuel oil and the amount of sulfur, and the matching ratio of the fuel oil and the ionic liquid is different; according to the experiment, the ratio of the feed of different types of fuel oil and ionic liquid It can be from 3:1 to 1:3.5, but this feed matching ratio is also affected by the DBTs content contained in the fuel oil and the operating temperature at the extraction step.

The oxidation treatment step 20 includes: a. The oxidation treatment step 20 includes a plurality of material transfer pumps 211/212/221/222 and a water filter and impurity screening program 232 including a air compressor 231, a high pressure gas, and a An ozone generator assembly 23 of an Ozone Generator 233, a Venturi Ejector 24, and a mixed buffer mixing tank 25 including a gas ventor 251, and An exhaust blower 26, an activated carbon adsorption tank 27, and an accelerated reaction tank 28; b. The oxidation treatment step 20 is in operation, the ozone generator 233 is started first, and ozone is started to be produced and the ozone is 2 to 3 kg. The pressure compression of /cm ² is stored in the cylinder for standby; and when the mixture of the fuel oil and the ionic liquid inside the mixed buffer tank 16 reaches a preset high level, the material delivery pump 211/212 is activated and will have previously passed the centrifugation. The mixture of fuel oil and ionic liquid of the extractor 15 is fed to the venturi gas-liquid mixer 24, and the liquid bypasses the inlet of the Venturi gas-liquid mixer 24 while sucking the compressed ozone into the venturi. Gas-liquid mixer 24 and The liquid mixture is gas-liquid mixed. Since the ozone passes through the throat of the venturi gas-liquid mixer 24, the ozone gas is formed in the venturi gas-liquid mixer 24 because the passage is reduced but is suddenly enlarged after passing through the throat. Bubbling intense disturbance, which can increase the contact between ozone and the mixture of fuel oil and ionic liquid to accelerate the oxidation reaction and increase the reaction rate of the extraction treatment step, but does not change its material properties (ionic liquid or aromatic hydrocarbon) Aromatic); the mixed liquid after the gas-liquid mixing enters the mixed solution buffer mixing tank 25 for reaction, and the gas escaping from the mixed liquid, including the decayed ozone, rises to the gas discharger 251 to accumulate, and at this time, the blower 26 starts to gas. After pumping through the activated carbon adsorption tank 27, the mechanism can adsorb the possible air pollution emissions to avoid air pollution; and the mixture entering the mixture buffer mixing tank 25 continues to carry out the extraction reaction. When the liquid level in the mixed solution buffer mixing tank 25 reaches a preset high liquid level, the material transfer pump 221/222 is started again, and the mixed liquid is sent. The reaction continued to accelerate the reaction tank 28 in preparation for the next stage of the processing step.

The centrifugal separation treatment step 30 is for performing high-speed separation of the mixed solution after the extraction reaction in the accelerated reaction tank 28 in the oxidation treatment step 20 to form a mixture of an ionic liquid and an extract, and a mixture of a fuel oil and a small amount of the extract. liquid.

The centrifugal separation processing step 30 includes a plurality of material transfer pumps 311/312, a high speed disc separator (32), a temporary storage tank 33 for the ionic liquid and the extract mixture, a fuel oil and a small amount of the extract. The temporary storage tank 34 of the mixed liquid.

During the centrifugation process step 30, after the mixture of the fuel oil and the ionic liquid completes the extraction reaction in the accelerated reaction tank 28 for a predetermined period of time, the material transfer pump 311/312 starts to start, and the mixture material is sent to the high speed. The centrifugal separator 32 performs high-speed separation of two different components by a high-speed centrifuge by means of a difference in specific gravity between the upper liquid in the mixed liquid, that is, the fuel oil and the ionic liquid-containing extract; the separated ionic liquid (including extraction) The pipeline enters the temporary storage tank 33 of the ionic liquid and the extract mixture, and the fuel oil (containing a small amount of the extract) follows the pipeline into the temporary storage tank 34 of the fuel oil and a small amount of the extract mixture to be further processed. deal with.

The specific gravity of the above ionic liquid (OMIM BF4) is about 1.10kg/liter; the specific gravity of ionic liquid (BMIMFeCl ₄ ) is 1.365kg/liter; the specific gravity of fuel oil depends on the composition of fuel oil, and the gasoline is about 0.73~0.76kg. /liter, Light Diesel is 0.83~0.86kg/liter, marine diesel and marine diesel (Marine Diesel) is about 0.85~0.87kg/liter, and Jet Fuel is about 0.75~ 0.8kg/liter; Heavy Fuel Oil depends on the type. Heavy oils of IFO-180~IFO-380 or No.1~6 are commonly used, and the specific gravity is between 0.86 and 0.991kg/liter. However, compared with the ionic liquid, the specific gravity of the ionic liquid and the fuel oil still have a considerable difference, and the high-speed centrifuge can be used to separate the two materials.

Referring to FIG. 2, the fuel oil recovery process step 40 uses short-path distillation as the core of the operation, and includes: a. the fuel oil recovery process step 40 includes a plurality of fuel oil recovery processing steps of the material transfer pump 411/412. /421/422/431/432, a preheater 44 for a fuel oil recovery process, a Short Path Evaporator for a fuel oil recovery process, and a heat medium oil expansion tank for a fuel oil recovery process 46. A heat medium oil heating furnace 47 for a fuel oil recovery treatment step, a heat medium oil transfer pump 481/482 for a plurality of fuel oil recovery processing steps, a fuel oil receiving temporary storage tank 491, and a by-product of a fuel oil recovery processing step a vacuum buffer tank 493 for receiving a temporary storage tank 492, a fuel oil recovery processing step, a gas-liquid separator 494 for a fuel oil recovery processing step, a vacuum pump 495 for a fuel oil recovery processing step, a product oil storage tank 496, and a fuel The by-product storage tank 497 of the oil recovery processing step; b. The fuel oil recovery processing step 40, in actual operation, first starts the heat medium oil heating furnace 47 and the fuel oil recovery processing step of the fuel oil recovery processing step The heat medium oil transfer pump 481/482 starts to send the heat medium oil through the cylinder wall interlayer of the short oil distiller 45 of the fuel oil recovery processing step and the heat medium oil heating jacket layer of the preheater 44 of the fuel oil recovery processing step, Returning to the heat medium oil heating furnace 47 of the fuel oil recovery processing step; and another heat medium oil is sent along the branch line Into the fuel oil recovery processing step, the heat medium oil expansion tank 46, and then loop back to the fuel oil recovery processing step, the heat medium oil transfer pump 481/482 inlet and the fuel oil recovery processing step, the heat medium oil heating furnace 47; this preheating The program continues until the cylinder wall interlayer temperature of the short path distiller 45 of the fuel oil recovery processing step and the heat medium oil heating jacket layer of the preheater 44 of the fuel oil recovery processing step reach a preset working temperature, and the heat medium oil The heating furnace 47 is suspended until the temperature of the hot kerosene which is returned after the exotherm is lower than the preset temperature, and then the furnace is again started to be heated; that is, the furnace is further intermittently started to maintain the required working temperature; the fuel oil is recovered. The heating power and temperature control of the heat medium oil heating furnace 47 in the processing step are controlled by a Diode type temperature controller (not shown) configured by the system; c. Recovery Process Step While the heat medium oil heating system is operating, the fuel oil recovery process step vacuum pump 495 is simultaneously started, and begins to pass the fuel oil recovery process step vacuum buffer tank 493 Fuel oil recovery processing step The gas-liquid separator 494 evacuates the fuel oil recovery processing step short-range distiller 45, the fuel oil receiving temporary storage tank 491, and the fuel oil recovery processing step by-product receiving temporary storage tank 492 until the vacuum inside the entire pipeline After the pressure reaches the preset working pressure, after the fuel oil recovery processing step, the vacuum pump 495 temporarily stops pumping until the internal working pressure of the short-distance distiller 45 rises after the start of the feeding, and the fuel oil recovery processing step vacuum pump 495 starts pumping again. That is, the vacuum pump is intermittently started to maintain the required working pressure. This mechanism allows the entire fuel oil recovery process step to maintain the working pressure inside the short-range distiller 45 at the preset range to maintain the system. Stability; d. When the system is ready to be completed, the operation is started, and in the centrifugal separation processing step 30, when the temporary storage tank 34 of the fuel oil and the small amount of the extract mixture reaches a high liquid level, the fuel oil recovery processing step material delivery pump 411, 412 starts to start, and the mixture of fuel oil and a small amount of extract is sent to the fuel. The oil recovery process step preheater 44 is indirectly heated; the material of the preheater 44 is passed through the fuel oil recovery process step into the fuel oil recovery process step, the feed distribution plate above the short path distiller 45, and then by the feed distribution plate The discharge gap in which the suction port is diagonally disposed falls along the cylinder wall in the short-range distiller 45 of the fuel oil recovery processing step into the fuel oil recovery processing step short-range distiller 45; the short-range distiller 45 due to the fuel oil recovery processing step The inner part is provided with a set of 4 sides of a scraper module (also referred to as a scraper cage, not shown) driven by a motor 451 and a reducer 452 at the upper side, and a whole row of graphite is arranged in front of the scraper cage. Blade, the spring mechanism behind the graphite scraper pushes the graphite scraper forward and tightly against the inner cylinder wall of the short-range distiller 45 of the fuel oil recovery process, so when the material slides down the cylinder wall, A graphite scraper with a continuous rotation speed of about 160 to 180 RPM applies a mixture of fuel oil and a small amount of extract to the surface of the cylinder wall to form a film of a predetermined thickness, and the material enters from the distribution plate. Oil recovery processing step The position in the short-distance distiller 45 is exactly 180 degrees from the suction port, so the material forming film is located at the opposite side of the suction port; while the cylinder wall is originally in the state of continuous warm-up, Because the fuel oil recovery process step, the working pressure and working temperature of the inner portion 45 of the short-distance distiller have reached the working condition that the fuel oil component to be locked out is evaporated into a molecular state, and therefore, the material falls into the cylinder wall and is squeezed by the scraper. After being applied to the cylinder wall to form a film, all the fuel oil molecules locked to the target are immediately evaporated and released (Fly out) on the surface of the film, and the suction port is opposite from the diagonal position. Still pumping continues to form a low pressure inlet, so these evaporated molecules begin to move in the direction of the relatively low suction pressure; however, because the fuel oil recovery process steps from the top to the bottom of the short path distiller 45 There is a set of condensers (not shown), so these evaporated fuel oil molecules pass through the condenser to reach the pumping Previously contacting first condenser to the condenser, due to internal cooling water through the condenser, Therefore, the fuel oil molecules attached to the surface of the condenser are cooled and returned to a liquid state to be condensed, and then the lower line enters the fuel oil receiving temporary storage tank 491, and when the fuel oil receiving temporary storage tank 491 reaches a high liquid level, the fuel Oil recovery processing step The material transfer pumps 421, 422 are automatically started, and the recovered fuel oil is sent to the product oil storage tank 496 for transportation; e. In the fuel oil recovery processing step 40, a small amount of the fuel oil and a small amount of the mixture of the extracts The extract contains impurities such as sulfides, nitrides, and aromatic hydrocarbons, and cannot be evaporated into a molecular form at a predetermined working pressure or operating temperature. Therefore, these impurities remain The liquid is gradually slid along the cylinder wall and falls into the inclined receiving hopper below the inside of the short-range distiller 45 of the fuel oil recovery processing step, and then overflows into the discharge line, and finally discharged into the fuel oil recovery processing step by-product. The tank 492 is stored, and when the fuel oil recovery processing step by-product receives the liquid level of the temporary storage tank 492 reaches a high liquid level, the fuel oil recovery portion Step material handling pump 431,432 to start, this product into a fuel oil storage tank by-product recycling step 497 stores waiting for transport.

Referring to FIG. 3, the ionic liquid recovery processing step 50 uses short-path distillation as the core of the operation, and includes: a. the ionic liquid recovery processing step 50 applies a plurality of ionic liquid recovery processing steps, the material transfer pump 511/512/ 521/522/531/532, an ionic liquid recovery processing step preheater 54, an ionic liquid recovery processing step Short Path Evaporator 55, an ionic liquid recovery processing step, a thermal medium oil expansion tank 56, an ion Liquid recovery processing step heat medium oil heating furnace 57, number ionic liquid recovery processing step, heat medium oil transfer pump 581/582, an ionic liquid receiving temporary storage tank 591, an ionic liquid recovery processing step by-product receiving temporary storage tank 592, an ion Liquid recovery processing step vacuum buffer tank 593, an ionic liquid recovery processing step gas-liquid separator 594, an ionic liquid recovery processing step vacuum pump 595, an ionic liquid storage tank 596, an ionic liquid recovery processing step by-product storage tank 597; b. The ionic liquid recovery processing step 50, in actual operation, first starts the ionic liquid recovery processing step, the heat medium oil heating furnace 57, and the fuel oil recovery processing step, the heat medium oil transfer pump 581/582, and starts to send the heat medium oil through the ions. Liquid recovery processing step The cylinder wall interlayer of the short path distiller 55 and the ionic liquid recovery processing step The heat medium oil of the preheater 54 heats the jacket layer, and then loops back to the ionic liquid recovery processing step heat medium oil heating furnace 57; A heat medium oil is sent to the ionic liquid recovery processing step in the heat medium oil expansion tank 56 according to the branch line, and then looped back to the ionic liquid recovery processing step. The heat medium oil transfer pump 581, 582 is sent to the ionic liquid recovery processing step. The medium oil heating furnace 57; this preheating program is continued until the ionic liquid recovery processing step of the cylinder wall interlayer temperature of the short path distiller 55 and the ionic liquid recovery processing step of the preheater 54 of the heat medium oil heating jacket reaches the preset After the working temperature, the heat medium oil heating furnace is suspended until the temperature of the hot kerosene after the exothermic heat is lower than the preset temperature, and then the furnace is again started to be heated; the ionic liquid recovery processing step The heating power and temperature of the heat medium heating furnace 57 are controlled by a diode-type temperature controller (Heating Fluid Controller and programmable controller PLC, not shown) configured by the system; c. At the same time as the ionic liquid recovery processing step, the heat medium oil heating system operates, the ionic liquid recovery processing step vacuum pump 595 is simultaneously started, and the ionic liquid recovery processing step is started, the vacuum buffer tank 593, the ionic liquid recovery processing step, the gas-liquid separator 594, the fuel Oil recovery processing step Short-path distiller 55, ionic liquid receiving temporary storage tank 591, ionic liquid recovery processing step by-product receiving temporary storage tank 592 for vacuuming until the vacuum pressure inside the entire pipeline reaches a preset working pressure, after which the ions The liquid recovery processing step vacuum pump 595 temporarily stops pumping until the internal working pressure of the short-range distiller rises after the start of feeding, and the ionic liquid recovery processing step vacuum pump 595 starts pumping again, that is, the furnace is intermittently started again, Maintaining the operating temperature, this mechanism allows the entire ionic liquid recovery process to be performed inside the short path distiller 55 Stress in the work Maintaining the preset range to maintain the stability of the system; d. The operation can be started when the system is ready to be completed, and when the temporary storage tank 33 of the ionic liquid and the extract mixture reaches the high liquid level in the centrifugal separation processing step 30, the ions Liquid recovery processing step The material transfer pump 511/512 starts to start, and the mixture of the ionic liquid and the extract is sent to the ionic liquid recovery processing step preheater 54 for indirect heating; the material of the preheater 54 enters the ion by the ionic liquid recovery processing step. The liquid recovery processing step is a feed distribution tray above the short-distance distiller 55, and then the discharge gap disposed diagonally with the suction port on the feed distribution plate falls along the cylinder wall in the short-range distiller 55 of the ionic liquid recovery processing step. (Cylinder) enters the ionic liquid recovery processing step short-path distiller 55; due to the ionic liquid recovery processing step, the short-range distiller 55 is internally provided with a set of 4 squeegee modules which are driven by a motor 551 and a reducer 552 to be continuously rotated. (also known as the scraper cage, not shown), a row of graphite scrapers is placed in front of the scraper cage, and the spring mechanism behind the graphite scraper pushes the graphite scraper forward. Close to the inner cylinder wall of the short-range distiller 55 of the ionic liquid fuel oil recovery process, therefore, when the material slides down the cylinder wall, the graphite scraper which continuously rotates at a speed of about 160-180 RPM mixes the ionic liquid and the extract. The liquid is applied to the surface of the cylinder wall to form a film, and since the material enters the ionic liquid recovery processing step from the distribution plate, the position in the short-distance distiller 55 is exactly 180 degrees from the suction port, so the position of the material forming film is just opposite the suction port. On the side of the cylinder wall, the cylinder wall is originally in the state of continuous preheating, because the working pressure of the inside of the short-distance distiller 55 and the working temperature have reached the state in which the ionic liquid component to be locked out is evaporated into a molecular state. Condition, therefore, after the material falls into the cylinder wall and is pressed onto the cylinder wall by the squeegee to form a film shape, all the locked ionic liquid molecules are immediately evaporated and released when the surface of the film is heated instantaneously. (Fly out), and because of the continuous suction from the diagonally opposite suction ports to form a low pressure inlet, these are Issued to the ionic liquid separation The child starts to move in the direction of the suction port where the working pressure is relatively low; however, since the ionic liquid recovery processing step is provided with a set of condensers (not shown) from the top to the bottom of the short path distiller 55, these are evaporated. The ionic liquid molecules that have come out contact the condenser on the condenser before passing through the condenser to reach the suction port. Since the cooling water passes through the condenser, the ionic liquid molecules attached to the surface of the condenser are cooled and returned to the liquid state. Condensation, and then enter the ionic liquid receiving temporary storage tank 591 according to the lower pipeline, and when the ionic liquid receiving temporary storage tank 591 reaches a high liquid level, the ionic liquid recovery processing step material conveying pump 521/522 is automatically started, and the recovered The ionic liquid is sent to the ionic liquid storage tank 596 for transportation; e. In the ionic liquid recovery processing step 50, a small amount of the extract of the mixture of the fuel oil and the small amount of the extract contains impurities such as sulfides, nitrides, and aromatic hydrocarbons. In terms of quality, it is not possible to be evaporated into a molecular form at a predetermined working pressure and operating temperature. Therefore, these impurities are The liquid phase gradually descends and falls into the inclined receiving hopper below the inside of the short-flow distiller 55 of the ionic liquid recovery processing step, and then overflows into the discharge line, and finally discharged into the lower ionic liquid recovery processing step by-product receiving temporary storage tank 592 When the liquid level of the ionic liquid recovery processing step by-product receiving the temporary storage tank 592 reaches a high liquid level, the ionic liquid recovery processing step material transfer pumps 531, 532 are activated, and the one-product is sent to the ionic liquid recovery processing step by-product storage tank. 597 storage waiting for delivery.

Referring to FIG. 4, the common processing step 60 is for providing cooling water and ice water, for the fuel oil recovery processing step, the condenser of the short path distiller 45, the externally configured cold well 453, and the ionic liquid recovery processing step. The condenser of the short path distiller 55 and the cold well 553 disposed outside are used.

The common processing step 60 applies a cooling water tower 61, an ice water unit 62, and a number. A chiller water cooling pump 631/632, a cooling water recovery pump 641/642, a cooling water transfer pump 651/652, a cooling water transfer pump 661/662 and the like.

When the common processing step 60 is performed, the devices included in the common processing step 60 are activated one by one, and the ice water and the cooling water are transported via the chiller cooling water transfer pump 631/632, the cooling water transfer pump 651/652, and the cooling water. The pump 661/662 is sent to the target equipment such as the fuel oil recovery processing step short-distance distiller 45 and the ionic liquid recovery processing step short-circuit distiller 55 cooling water inlet line, and then returns to the recovered pipeline, and then the cooling water recovery pump 641 / 642 is sent back to the cooling tower for heat dissipation and cooling, and the cooling water is returned to the preset temperature when it is sent out again; according to the requirements of the system, the temperature of the output cooling water is about 25-28 ° C, and the temperature of the recovered cooling water is about 30~ At 33 ° C, the temperature difference between the two is about 5 ° C; therefore, the cooling energy required for the cooling tower, the working pressure and flow rate of the individual cooling water pump should be based on the individual conditions and requirements of the operating system. According to the individual design basis, the appropriate specifications are set to meet the actual needs.

In one embodiment, the fuel oil recovery process step has a working pressure inside the short path distiller 45 of 20 to 25 Pa (Pascal).

In one embodiment, the fuel oil recovery process step has an operating temperature inside the short path distiller 45 of 150 to 180 °C.

In one embodiment, the graphite scraper in the fuel oil recovery process step 40 applies a mixture of fuel oil and a small amount of extract to the surface of the cylinder wall of the short-range distiller 45 of the fuel oil recovery process to form a film having a thickness of less than 1 mm.

In one embodiment, the ionic liquid recovery process step has a working pressure inside the short path distiller 55 of 20 to 25 Pa (Pascal).

In one embodiment, the ionic liquid recovery treatment step has an operating temperature inside the short path distiller 55 of 110 to 130 °C.

In one embodiment, the graphite scraper in the ionic liquid recovery processing step 50 applies a mixture of the ionic liquid and the extract to the surface of the cylinder wall of the short-path distiller 55 of the ionic liquid recovery processing step to form a film having a thickness of less than 1 mm.

In an embodiment, the fuel oil recovery processing step in the fuel oil recovery processing step 40 is connected to a cold well 453, a fuel oil recovery processing step material delivery pump 454, a material storage tank 455; Oil recovery processing step In the evaporation operation of the short-distance distiller 45, a small amount of light hydrocarbons such as C7~10H16~22 have a molecular weight smaller than the molecular weight of the fuel oil to be recovered, and the average molecular free path is more. Long; therefore, in operation, these small amounts of light hydrocarbons are vaporized together, and with a longer molecular free-running escape fuel oil recovery process, the built-in condenser of the short-distance distiller 45, after entering the pumping passage, Into the cold well, 453 is captured; since these small amounts of light hydrocarbons contain volatile gases and the preset operating temperature is as high as 150-180 ° C, in order to avoid these light hydrocarbon molecules entering the pipeline of the vacuum system The fuel oil recovery process steps the damage of the vacuum pump 495. Therefore, the system is provided with cold water of 5 ° C as condensed water and continuously introduced into the cold well 453. In the pipeline, the light hydrocarbons trapped in the cold well 453 are condensed at a low temperature of 5 ° C ice water; after that, when the liquid level of the cold well 453 reaches a preset high liquid level, Fuel oil recovery processing step The material transfer pump 454 empties the material in the cold well 453 and sends it to the material storage tank 455 that accepts light hydrocarbons for transportation; the ice water required for the condensing system is used by the common processing equipment. Provided by the chiller 62 provided; during operation, the ice water of the preset temperature of 5 ° C manufactured by the chiller 62 is continuously transported to the cold well 453 by the ice water pump built in the chiller 62 for cooling. The condensed and condensed cooling water is sent back to the chiller 62 and then cooled down to 5 ° C, and then sent back to the cold well 453. In addition, in order to avoid continuous long-term operation, the fuel oil recovery process is short-distance distillation due to heat transfer. The lubricating oil of the deceleration mechanism external to the unit 45 is overheated to cause the speed reducer 452 to malfunction. Therefore, the ice water sent from the chiller unit 62 is guided by a branch line to the shaft seal cooler of the short-range distiller 45 of the fuel oil recovery processing step. The shaft seal is cooled, and the used cooling water is recirculated to the chiller 62 for recirculation by recirculating the condensed water discharged from the cold well 453.

In the embodiment, the ionic liquid recovery processing step in the ionic liquid recovery processing step 50 is connected to a cold well 553, an ionic liquid recovery processing step material transfer pump 554, a material storage tank 555, and the ionic liquid Oil Recovery Process Step In the evaporation operation of the short path distiller 55, the extract may also contain a very small amount of light hydrocarbons having a small molecular weight such as C7~10H16~22, and these light weight hydrocarbons having a small molecular weight are Under the working pressure of 20Pa, it can be evaporated under the working temperature of 110~130°C. Because these light hydrocarbons have a small molecular weight and their molecular free travel is longer; therefore, in operation, these extremely small amounts of light Hydrocarbon molecules may escape the ionic liquid recovery process by virtue of their longer molecular free path. The built-in condenser of the short-path distiller 55 enters the pumping channel and then enters the cold well 553 to be captured; due to these light carbons Hydrogen compounds contain volatile gases and operate at temperatures up to 110-130 ° C to avoid the entry of these light hydrocarbon molecules into the piping of the vacuum system. The ionic liquid recovery processing step is damaged by the vacuum pump 595. Therefore, in the system, ice water of 5 ° C is used as condensed water to continuously introduce into the condensing line of the cold well 553, and the low temperature moment of ice water at 5 ° C will be captured. The light hydrocarbons in the cold well 553 are condensed; after that, the liquid level of the cold well 553 is reached. At the preset high liquid level, the material in the cold well 553 is emptied by the ionic liquid recovery processing step material feed pump 554, and sent to the material storage tank 555 receiving the light hydrocarbon for transportation; this condensing system is required The ice water used is provided by the ice water unit 62 provided by the common processing step device; in operation, the ice water with a preset temperature of 5 ° C manufactured by the ice water unit 62 is continuously transported by the ice water provided by the ice water unit 62. The pump is sent to the cold well 553 for condensation. The condensed cooling water is sent back to the ice water unit 62 and then cooled down to 5 ° C, and then sent back to the cold well 553. In addition, in order to avoid continuous long-term operation, heat transfer The ionic liquid recovery processing step causes the lubricating oil of the speed reducing mechanism outside the short-distance distiller 55 to overheat, causing the speed reducer 552 to malfunction. Therefore, the ice water sent by the chiller unit 62 is guided by a branch line to the ionic liquid recovery processing step. The shaft seal cooler of the distiller 55 cools the shaft seal, and the used cooling water is recirculated to the chiller 62 for recirculation by recirculating the condensed water discharged from the cold well 553.

In summary, the present invention uses ozone as an oxidant to replace the conventional hydrogen peroxide, so that the fuel oil can accelerate the reaction in the desulfurization and denitrification extraction step for deep desulfurization and denitrification without changing the extraction. The material properties of the material; in addition, the short-range still can recover low-sulfur, low-nitrogen fuel oil and recover ionic liquid for reuse in a low-temperature, low-pressure safe working environment. This treatment step has the characteristics of no secondary pollution. Moreover, the operation is more safe, relatively energy-saving, and can save manufacturing costs.

The above is an embodiment of the present invention, and is merely for convenience of description. When it is not possible to limit the meaning of the present invention, various transformation designs according to the scope of the listed patent application are included in the patent scope of the present invention. in.

10‧‧‧ fuel oil extraction process steps

11‧‧‧fuel oil blending heating tank

121/122/131/132‧‧‧ material transfer pump

14‧‧‧ room temperature ionic liquid storage tank

15‧‧‧Centrifugal extraction machine

16‧‧‧Combination buffer tank for fuel oil and extract

20‧‧‧Oxidation treatment steps

211/212/221/222‧‧‧ material transfer pump

23‧‧‧Ozone generator assembly

231‧‧‧Air compressor

232‧‧‧High-pressure gas filtration and impurity screening program

233‧‧Ozone generator

24‧‧‧ Venturi gas-liquid mixer

25‧‧‧ Mixture buffer mixing tank

251‧‧‧ gas discharger

26‧‧‧Exhaust air blower

27‧‧‧Active carbon adsorption tank

28‧‧‧Accelerated reaction tank

30‧‧‧ Centrifugal separation processing steps

311/312‧‧‧ material pump

32‧‧‧High speed centrifuge

33‧‧‧Storage tank for ionic liquid and extract mixture

34‧‧‧Storage tank for fuel oil and a small amount of extract mixture

40‧‧‧ Fuel oil recovery process steps

411/412/421/422/431/432‧‧‧ fuel oil recovery process step material transfer pump

44‧‧‧fuel oil recovery treatment step preheater

45‧‧‧Fuel oil recovery process short-range distiller

451‧‧‧Motor

452‧‧‧Reducer

453‧‧‧Lengjing

454‧‧‧fuel oil recovery process step material transfer pump

455‧‧‧ material storage tank

46‧‧‧Fuel oil recovery process step Thermal medium oil expansion tank

47‧‧‧Fuel oil recovery treatment step Heat medium oil heating furnace

481/482‧‧‧fuel oil recovery treatment step

491‧‧‧fuel oil receiving temporary storage tank

492‧‧‧ Fuel oil recovery treatment process by-product receiving temporary storage tank

493‧‧‧fuel oil recovery process vacuum buffer tank

494‧‧‧Fuel oil recovery process step gas-liquid separator

495‧‧‧fuel oil recovery process vacuum pump

496‧‧‧Stained oil storage tank

497‧‧‧fuel oil recovery process by-product storage tank

50‧‧‧Ionic liquid recovery processing steps

511/512/521/522/531/532‧‧‧ Ionic liquid recovery process step material transfer pump

54‧‧‧Ion liquid recovery processing step preheater

55‧‧‧ Ionic liquid recovery processing step short-range distiller

551‧‧‧Motor

552‧‧‧Reducer

553‧‧‧Lengjing

554‧‧‧Ionic liquid recovery processing step material transfer pump

555‧‧‧ material storage tank

56‧‧‧Ionic liquid recovery treatment step Thermal medium oil expansion tank

57‧‧‧Ionic liquid recovery treatment step heat medium oil heating furnace

581/582‧‧‧Ionic liquid recovery treatment step

591‧‧‧Ionic liquid receiving temporary storage tank

592‧‧‧Ionic liquid recovery treatment process by-product accepting temporary storage tank

593‧‧‧Ionic liquid recovery processing step vacuum buffer tank

594‧‧‧Ionic liquid recovery treatment step gas-liquid separator

595‧‧‧Ionic liquid recovery process vacuum pump

596‧‧‧ ionic liquid storage tank

597‧‧‧Ion solution recovery process by-product storage tank

60‧‧‧Common processing steps

61‧‧‧Cooling tower

62‧‧‧Ice water unit

631/632‧‧‧Ice water machine cooling water pump

641/642‧‧‧Cooling water recovery pump

651/652‧‧‧Cooling water pump

661/662‧‧‧Cooling water pump

Claims (9)

A method for accelerating desulfurization, denitrification and ionic liquid recovery and reuse of fuel oil, characterized in that the method comprises: (1) a fuel oil extraction treatment step for mixing the fuel oil with an ionic liquid for desulfurization And the denitrification extraction procedure; and (2) the oxidation treatment step, comprising: a. the oxidation treatment step comprises a plurality of material delivery pumps and a water filtration and impurity screening program including an air compressor, a high pressure gas, and a An ozone generator assembly for an ozone generator; a venturi gas-liquid mixer; a mixed liquid buffer mixing tank including a gas discharge; an exhaust blower; an activated carbon adsorption tank and an accelerated reaction tank; The ozone generator assembly manufactures ozone and stores the ozone for use, and sends the mixed mixture of the fuel oil and the ionic liquid in the fuel oil extraction treatment step to the venturi gas-liquid mixer by one of the material transfer pumps. And the venturi gas-liquid mixer simultaneously inhales the compressed ozone to be gas-liquid mixed with the mixed fuel oil and the ionic liquid to form a bubbling disturbance; c. The liquid mixture after the gas-liquid mixing of the gas-liquid mixture enters the mixed buffer mixing tank for reaction, and the ozone escaping from the mixed liquid rises to the gas discharger to accumulate, and the gas is blown by the exhaust blower After pumping through the activated carbon adsorption tank and discharging to the atmosphere, the mixture entering the mixed buffer buffer tank reaches a predetermined liquid level, and then one of the material transfer pumps is started, and the mixed liquid is sent to the accelerated reaction tank for continuous operation. And (3) a centrifugal separation treatment step for high-speed separation of the mixed solution in the accelerated reaction tank after the oxidation treatment step by a high-speed centrifugal separator to form a mixture of an ionic liquid and an extract a liquid, and a mixture of a fuel oil and a small amount of extract; and (4) a fuel oil recovery treatment step using short-path distillation as a core of operation, comprising: a. the fuel oil recovery treatment step includes several fuel oil recovery processes Step material transfer pump, a fuel oil recovery process step preheater, a fuel oil recovery process step short path distiller, a fuel oil recovery process step heat medium Oil expansion tank, a fuel oil recovery treatment step, a heat medium oil heating furnace, a plurality of fuel oil recovery processing steps, a heat medium oil transfer pump, a fuel oil receiving temporary storage tank, a fuel oil recovery processing step, a by-product receiving temporary storage tank, and a Fuel oil recovery processing step vacuum buffer tank, a fuel oil recovery processing step gas-liquid separator, a fuel oil recovery processing step vacuum pump, a product oil storage tank, a fuel oil recovery processing step by-product storage tank; b. with the fuel oil Recovery processing step heat medium oil heating furnace and the fuel oil recovery processing step, the heat medium oil transfer pump sends the heat medium oil through the fuel oil recovery processing step, the cylinder wall interlayer of the short path distiller, and the fuel oil recovery processing step preheater Heating the jacket layer, and then returning to the fuel oil recovery processing step of the heat medium oil heating furnace, and the other heat medium oil is sent to the fuel oil recovery processing step of the heat medium oil expansion tank, and then returning to the heat recovery oil tank Fuel oil recovery processing step heat medium oil heating furnace until the fuel oil recovery processing step cylinder wall interlayer of the short path distiller and the fuel oil recovery processing step preheater After the heating jacket layer reaches a predetermined working temperature, the heat medium oil heating furnace is further intermittently started to maintain the required working temperature; c. starting the fuel oil recovery processing step vacuum pump, and vacuum buffering through the fuel oil recovery processing step The fuel oil recovery processing step gas-liquid separator, the fuel oil recovery processing step short-range distiller, the fuel oil receiving temporary storage tank, and the fuel oil recovery processing step by-product receiving temporary storage tank are evacuated until the predetermined time is reached Working pressure, the vacuum pump is intermittently started to maintain the required working pressure; d. One of the fuel oil recovery processing steps, the material transfer pump, the mixing of the fuel oil and the small amount of extract formed by the centrifugal separation treatment step The liquid is sent through the fuel oil recovery processing step to be heated by the preheater, and then sent to the fuel oil recovery processing step short-distance distiller, the fuel oil recovery processing step is provided by a scraper disposed inside the short-distance distiller to the fuel oil and a small amount of the extract Mixing liquid is applied to form a film of a predetermined thickness on the surface of the cylinder wall of the short-distance distiller in the fuel oil recovery process step The film is heated by the predetermined temperature generated by the heating of the cylinder wall interlayer of the short-distance distiller of the fuel oil recovery process by the fuel oil recovery and evaporates the fuel oil molecules, and the fuel oil molecules are pumped to the fuel oil recovery process for short-distance distillation. a condenser built in the condenser, which cools the fuel oil molecules attached to the surface of the condenser and returns to liquid condensed, and collects the liquid fuel oil into the fuel oil to receive the temporary storage tank and feeds the product oil. a storage tank; e. a small amount of the extract of the fuel oil and a small amount of extract can not be evaporated into a molecular form, and the liquid state slides down the cylinder wall and falls below the inside of the short-range distiller of the fuel oil recovery process step, Re-entering the fuel oil recovery processing step by-product receiving temporary storage tank and feeding the fuel oil recovery processing step by-product storage tank; and (5) an ionic liquid recovery processing step using short-path distillation as a working core, which comprises: a. The ionic liquid recovery processing step comprises a plurality of ionic liquid recovery processing steps, a material transfer pump, an ionic liquid recovery processing step preheater, and a separation Liquid recovery treatment step short-range distiller, one ionic liquid recovery treatment step, heat medium oil expansion tank, one ionic liquid recovery treatment step, heat medium oil heating furnace, several ionic liquid recovery treatment steps, heat medium oil transfer pump, one ionic liquid receiving Storage tank, one ionic liquid recovery processing step by-product receiving temporary storage tank, one ionic liquid recovery processing step vacuum buffer tank, one ionic liquid recovery processing step gas-liquid separator, one ionic liquid recovery processing step vacuum pump, one ionic liquid storage tank, An ionic liquid recovery processing step by-product storage tank; b. The ionic liquid recovery processing step, the heat medium oil heating furnace and the ionic liquid recovery processing step, the heat medium oil transfer pump sends the heat medium oil through the ionic liquid recovery processing step, short-distance distillation The cylinder wall interlayer of the device and the heating jacket layer of the preheater of the ionic liquid recovery processing step are looped back to the ionic liquid recovery processing step of the heat medium oil heating furnace, and another heat medium oil is fed into the ion The liquid recovery treatment step heat medium oil expansion tank, and then loop back to the ionic liquid recovery processing step heat medium oil heating furnace until the ionic liquid recovery processing step The cylinder wall interlayer of the distiller and the heating jacket of the ionic liquid recovery processing step preheater reach a predetermined working temperature, after which the heat medium oil furnace is intermittently started to maintain the working temperature; c. Ionic liquid recovery processing step vacuum pump, through the ionic liquid recovery processing step vacuum buffer tank, ionic liquid recovery processing step gas-liquid separator, the ionic liquid recovery processing step short-range distiller, the ionic liquid receiving temporary storage tank, the ionic liquid The recycling process by-product receives the temporary storage tank for vacuuming until the predetermined working pressure is reached, after which the vacuum pump is intermittently started to maintain the required working pressure; d. one of the ionic liquid recovery processing steps, the material transfer pump, The ionic liquid and the extract mixture formed by the centrifugation treatment step are sent to the ionic liquid recovery treatment step preheater for heating, and then sent to the ionic liquid recovery processing step short-range distiller, the ionic liquid recovery processing step short-range distiller The internal squeegee applies a mixture of ionic liquid and extract to the ionic liquid recovery process. Forming a film of a predetermined thickness on the surface of the cylinder wall of the distiller such that the film is heated by the predetermined temperature generated by the heating of the cylinder wall interlayer of the short-path distiller of the ionic liquid recovery process and evaporating the ionic liquid molecules, and Ionic liquid molecules are pumped into the ionic liquid recovery processing step. A condenser built in the short-path distiller, the condenser cools the ionic liquid molecules attached to the surface of the condenser and returns to liquid condensed, and the ionic liquid collected into the liquid re-enters The ionic liquid is received in the temporary storage tank and sent to the ionic liquid storage tank; e. The extract in the mixture of the ionic liquid and the extract cannot be evaporated to become a molecular form, and the liquid is slid down along the cylinder wall and falls into the liquid The ionic liquid recovery processing step is below the inside of the short-path distiller, and then enters the ionic liquid recovery processing step by-product receiving the temporary storage tank and feeding the ionic liquid recovery processing step by-product storage tank; (6) a common processing step by means of a cooling water tower And an ice water machine for generating cooling water and ice water for providing cooling water and ice water to the fuel oil recovery processing step short-distance distiller a condenser and an externally attached cold well are used as condensed water, and a built-in condenser supplied to the short-range distiller of the ionic liquid recovery processing step and a cold well attached thereto are used as condensed water; and the ionic liquid is selected from OMIM BF4 Or BMIMFeCl ₄ . The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, wherein the fuel oil recovery processing step has a preset working pressure of 20 to 25 Pa inside the short-distance distiller. The method for accelerating desulfurization, denitrification and ionic liquid recovery and reuse of fuel oil according to claim 1, characterized in that the fuel oil recovery treatment step has a preset working temperature of 150 to 180 ° C inside the short-distance distiller. The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, wherein the graphite scraper in the fuel oil recovery treatment step smears a mixture of fuel oil and a small amount of extract A film having a thickness of less than 1 mm is formed on the surface of the cylinder wall of the short-distance distiller in the fuel oil recovery treatment step. The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, characterized in that the ionic liquid recovery processing step has a preset working pressure inside the short-distance distiller It is 20~25Pa. The method for accelerating desulfurization, denitrification and ionic liquid recovery and reuse of fuel oil according to claim 1, wherein the ionic liquid recovery processing step has a preset internal working temperature of 110 to 130 ° C. The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, wherein the graphite scraper in the ionic liquid recovery treatment step smears a mixture of the ionic liquid and the extract Ionic Liquid Recovery Treatment Step The surface of the cylinder wall of the short path distiller forms a film having a thickness of less than 1 mm. The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, characterized in that the fuel oil recovery processing step in the fuel oil recovery processing step is further connected to the externally attached device a cold well, a fuel oil recovery processing step material transfer pump, a material storage tank, so that the light hydrocarbon generated in the short-range distiller of the fuel oil recovery process can enter the cold well to be captured and condensed, and then In the fuel oil recovery processing step, the material transfer pump feeds the condensed material in the cold well into the material storage tank for transportation. The method for accelerating desulfurization, denitrification, and ionic liquid recovery and reuse of fuel oil according to claim 1, characterized in that the ionic liquid recovery processing step in the ionic liquid recovery processing step is further connected to the externally attached device Cold well, a fuel oil recovery processing step material transfer pump, a material storage tank, so that the ionic liquid recovery processing step light hydrocarbon produced in the short-distance distiller can enter the cold well to be captured and condensed, and then In the ionic liquid recovery processing step, the material transfer pump feeds the condensed material in the cold well into the material storage tank for transportation.