CN110655966A

CN110655966A - Oil-soluble loaded metal oxide ash removal combustion improver and preparation method thereof

Info

Publication number: CN110655966A
Application number: CN201810693895.XA
Authority: CN
Inventors: 刘影; 严斌; 胡涛英; 熊靓
Original assignee: Guangchang Daxin Material Technology Service (shenzhen) Ltd By Share Ltd; Shenzhen Guangchangda Petroleum Additive Co Ltd
Current assignee: Guangchang Daxin Material Technology Service (shenzhen) Ltd By Share Ltd; Shenzhen Guangchangda Petroleum Additive Co Ltd
Priority date: 2018-06-29
Filing date: 2018-06-29
Publication date: 2020-01-07

Abstract

The invention relates to an oil-soluble loaded metal oxide ash removal combustion improver and a preparation method thereof, wherein the oil-soluble loaded metal oxide ash removal combustion improver is prepared by using oxidized modified nano carbon black, a metal salt solution, an organic solvent, a modifier and a dispersant as raw materials through the working procedures of carrier pretreatment, loading, activation and the like. The invention can be used for preventing the corrosion and scaling of equipment when burning heavy oil and coal, and can also be used as a combustion improver to promote the fuel combustion. The invention has the advantages of simple preparation process, good product stability and water resistance, good ash removal and combustion supporting effects, small addition amount and the like, can be fully mixed with heavy oil or coal powder, and is a fuel additive with wide application prospect.

Description

Oil-soluble loaded metal oxide ash removal combustion improver and preparation method thereof

Technical Field

The invention belongs to the technical field of fuel additives, and particularly relates to an oil-soluble loaded metal oxide ash removal combustion improver and a preparation method thereof.

Background

With the rapid development of the world economy and the continuous increase of the demand for petroleum, the conventional petroleum reserves are reduced day by day, and the heavy oil with huge exploration potential and wide development prospect becomes one of the important energy resources in the 21 st century. However, heavy oil contains more impurities, has high viscosity and high C/H, is difficult to completely combust, and can generate a large amount of acid gas, ash and scale in the combustion process, thereby bringing a plurality of problems to the operation, maintenance and repair of a unit and an auxiliary system thereof; and the coal has more impurities and higher C/H ratio, and the problems encountered during combustion are more prominent. In order to solve the problems, scientific researchers of various countries propose various solutions, wherein the simplest and most effective method is to add an ash removal combustion improver into the fuel to prevent combustion products from forming scale on the surface of equipment to corrode the equipment, promote the full combustion of the fuel, save energy and reduce the emission of pollutants.

At present, the main components of the ash removal combustion improver on the market are alkali metal, alkaline earth metal or transition metal, and the ash removal combustion improver can be divided into a water-soluble agent, a colloid suspending agent and an oil-soluble agent according to the product state, wherein the water-soluble agent and the fuel are difficult to be uniformly mixed, and the use effect is poor; the colloidal suspending agent has poor dispersion stability and is difficult to store for a long time; the oil-soluble agent is mainly organic acid salt of alkali metal, alkaline earth metal and transition metal, has poor water resistance, and is greatly limited in use because heavy oil or fire coal usually contains a certain amount of water. In conclusion, the traditional ash removal combustion improver has poor comprehensive performance and is difficult to popularize and use on a large scale, so that a novel ash removal combustion improver is needed to be developed for preventing the corrosion and scaling on the surface of equipment when heavy oil and coal are combusted, promoting the full combustion of fuel and realizing the aims of energy conservation and emission reduction.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the oil-soluble loaded metal oxide deashing combustion improver and the preparation method thereof, and the preparation method has the advantages of simple preparation process, good product stability and water resistance, good deashing combustion-supporting effect, small addition amount, uniform mixing with fuel and the like.

A preparation method of an oil-soluble loaded metal oxide ash removal combustion improver comprises the following steps:

a. adding 1 part of carbon black with the particle size of 1-100 nm into 5-15 parts of strong oxidation type medium according to the parts by weight, stirring and reacting at 25-60 ℃, preferably reacting for 1-5 h, and filtering, leaching and drying to obtain the oxidation modified carbon black;

b. placing the oxidized modified carbon black in a metal salt solution for immersion loading, preferably for 12-24 h, filtering and drying at low temperature to obtain an oil-soluble loaded metal oxide precursor, wherein the weight ratio of the oxidized modified carbon black to the metal salt is 1: 0.4-1: 4;

c. adding the oil-soluble loaded metal oxide precursor, 15-50 parts of organic solvent, 0.1-1 part of modifier and 0.05-0.2 part of dispersant into a reaction kettle according to parts by weight, reacting at 250-350 ℃, preferably for 6-12 h, and then distilling under reduced pressure to obtain the oil-soluble loaded metal oxide ash removal combustion improver.

Further, the particle diameter of the carbon black is preferably 40nm to 80 nm.

Further, the strong oxidation type medium is at least one of hydrogen peroxide solution with mass concentration of 5-30% and nitric acid solution with mass concentration of 5-25%, preferably hydrogen peroxide solution with mass concentration of 15-30%.

Further, the metal salt solution is at least one of salt solutions of iron, cobalt, chromium, magnesium, copper and zinc, and preferably a mixed solution of a copper salt solution and at least one of salt solutions of iron, cobalt, chromium, magnesium and zinc.

Further, the anion in the metal salt is at least one of acetate ion and nitrate ion, preferably acetate ion.

Further, the organic solvent is at least one of aliphatic hydrocarbon solvents or aromatic hydrocarbon solvents.

Further, the modifier is at least one of carboxylic acid or sulfonic acid with 12-24 carbon atoms; preferably at least one of carboxylic acid or sulfonic acid having 18 to 22 carbon atoms.

Further, the dispersant is at least one of terpene resin and acrylic resin.

Furthermore, the oil-soluble load metal oxide deashing combustion improver can be used for preventing corrosion and scaling on the surface of equipment during the combustion of heavy oil or coal, and can also be used as a combustion improver for promoting the combustion of the heavy oil or coal powder, and the addition amount of the oil-soluble load metal oxide deashing combustion improver in the heavy oil or coal powder is 50-1000ppm by mass.

Compared with the prior art, the oil-soluble loaded metal oxide deashing combustion improver has the following advantages:

1) the physical and chemical properties of the product. Firstly, the carrier of the product is carbon black with large specific surface area, and the metal oxide can be uniformly dispersed on the surface of the carrier, so that the ash removal and combustion supporting effects of the product are improved, the metal consumption is reduced, and the ash content of the product after combustion is reduced. Secondly, the product has good storage stability, on one hand, because the carbon black is subjected to oxidation modification before being dipped in the metal salt solution, the surface of the product contains more hydroxyl groups, the combination of the carbon black and the metal oxide is more compact, and the phenomena of separation and falling off can not occur; on the other hand, after the product is modified by long-chain carboxylic acid or sulfonic acid, the surface energy of the particles is effectively reduced, so that the product is not easy to agglomerate; in addition, the dispersing agent can form a layer of protective film on the surfaces of the particles, so that the friction resistance between the particles is reduced, and the probability of combination of the particles in a product due to collision is greatly reduced. Thirdly, after the surfaces of the particles of the product are modified by the long-chain organic acid, water molecules can be prevented from penetrating through organic layers on the surfaces and entering the interior, and the product has excellent water resistance, so that the product is suitable for water-containing heavy oil or fire coal (the heavy oil can be combusted only by being mixed with water in some occasions), and the product applicability is improved, which cannot be achieved by most oil-soluble products in the current market. Finally, the product is an oil-soluble product modified by long-chain carboxylic acid and sulfonic acid, has excellent wetting property on the surface of coal powder, can be fully mixed with heavy oil and fire coal, and greatly improves the using effect of the product.

2) The product has the function. Firstly, the product has the function of corrosion prevention and ash removal, on one hand, the metal oxide can be combined with impurity metals such as vanadium and the like in heavy oil or fire coal to form ash with high melting point and loose structure, the ash with high melting point has little corrosion to equipment, is easy to fall off, and is more convenient to clean and maintain; on the other hand, the metal oxide can be decomposed at high combustion temperature to generate gas, so that the furnace ash/slag is expanded and loosened; in addition, the metal oxide has certain alkalinity, and can neutralize acidic substances generated in the combustion process of heavy oil or coal powder and inhibit the corrosion of the acidic substances to metal equipment. Secondly, the product has excellent combustion-supporting performance, on one hand, because metal oxides such as copper, zinc oxide and the like in the product can reduce the apparent activation energy of fuel combustion, the ignition point of the fuel can be obviously reduced, and the delay time of fuel combustion ignition can be effectively shortened; the iron can improve the volatile component in the fuel combustion process, thereby promoting the fuel to be fully combusted; synergistic effect exists among different metal oxides, and the combustion-supporting effect is more excellent when the metal oxides are compounded for use; on the other hand, the product is nano carbon black loaded with metal oxide on the surface, and the carbon black can rapidly react with oxygen at high temperature to generate carbon dioxide to generate micro-explosion effect, so that the mixing of fuel, combustion improver and air can be promoted; in addition, oxygen-containing molecules such as modifier organic carboxylic acid and benzene sulfonic acid also have certain combustion-supporting effect. Therefore, the anticorrosive ash remover can be used for preventing heavy oil or coal combustion equipment from being corroded and scaled, and can also be used as a combustion improver for promoting the combustion of heavy oil or coal powder.

In a word, the oil-soluble loaded metal oxide deashing combustion improver has good stability, can be fully mixed with fuel, has strong adaptability to the fuel, has the functions of anticorrosion deashing and combustion supporting, is safe, pollution-free, non-corrosive and odorless, is an environment-friendly product, and has wide application prospect.

Detailed Description

In order to facilitate understanding of the present invention, the present invention is described below in conjunction with an oil-soluble loaded metal oxide ash removal combustion improver and a preparation method thereof. Some examples of the invention are given herein. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as set forth in the specification in order to provide a more thorough and complete disclosure of the invention.

Example 1

Adding 100g of carbon black with the particle size of 1-40 nm into 1000g of nitric acid solution with the mass concentration of 5%, stirring for 5h at 60 ℃, washing and drying, then soaking in 1000g of ferrous acetate aqueous solution with the mass concentration of 10% for 18h, filtering, and drying at low temperature to obtain a precursor;

adding the precursor, 3000g of mixed trimethylbenzene, 50g of stearic acid and 5g of acrylic resin into a reaction kettle, reacting for 8 hours at 250 ℃, and then filtering, decompressing and distilling to obtain the oil-soluble ash-removing combustion improver loaded with the iron oxide with the effective concentration of 13%.

Example 2

Adding 100g of carbon black with the particle size of 40-80 nm into 500g of 25% nitric acid solution, stirring for 1h at 25 ℃, washing with water, drying, soaking in 500g of 8% cobalt nitrate aqueous solution for 24h, filtering, and drying at low temperature to obtain a precursor;

adding the precursor, 1500g of dodecylbenzene, 10g of tall oil acid and 10g of acrylic resin into a reaction kettle, reacting for 6 hours at 350 ℃, and filtering, decompressing and distilling to obtain the oil-soluble cobalt oxide-loaded deashing combustion improver with the effective concentration of 8%.

Example 3

Adding 100g of carbon black with the particle size of 80-100 nm into 1500g of hydrogen peroxide solution with the mass concentration of 5%, stirring for 3h at 50 ℃, washing with water, drying, soaking in 1500g of copper nitrate solution with the mass concentration of 10% for 12h, filtering, and drying at low temperature to obtain a precursor;

adding the precursor, 5000g of paraffin oil, 100g of dodecylbenzene sulfonic acid and 20g of terpene resin into a reaction kettle, reacting for 12 hours at 280 ℃, and filtering, decompressing and distilling to obtain the oil-soluble copper oxide-loaded deashing combustion improver with the effective concentration of 15%.

Example 4

Adding 100g of carbon black with the particle size of 40-80 nm into 1500g of 30% hydrogen peroxide solution, stirring for 4h at 50 ℃, washing and drying, soaking in 1000g of 10% zinc acetate solution for 12h, filtering, and drying at low temperature to obtain a precursor;

adding the precursor, 3000g of dimethylbenzene, 30g of palmitic acid and 10g of terpene resin into a reaction kettle, reacting for 10 hours at 300 ℃, and filtering, decompressing and distilling to obtain the oil-soluble zinc oxide-loaded deashing combustion improver with the effective concentration of 10%.

Example 5

Adding 100g of carbon black with the particle size of 40-80 nm into 1000g of hydrogen peroxide solution with the mass concentration of 20%, stirring for 4h at 50 ℃, washing and drying, then soaking in 1000g of mixed solution of magnesium acetate with the mass concentration of 10% and copper acetate with the mass concentration of 15% for 20h, filtering and drying at low temperature to obtain a precursor;

adding the precursor, 2500g of heavy aromatic hydrocarbon, 40g of heavy alkyl benzene sulfonic acid and 10g of acrylic resin into a reaction kettle, reacting for 10 hours at 330 ℃, and then filtering, decompressing and distilling to obtain the oil-soluble ash removal combustion improver loaded with the magnesium copper oxide with the effective concentration of 10%.

Example 6

Adding 100g of carbon black with the particle size of 40-80 nm into 1000g of hydrogen peroxide solution with the mass concentration of 20%, stirring for 4h at 50 ℃, washing with water, drying, soaking in 2000g of mixed solution of ferrous acetate with the mass concentration of 10% and copper acetate with the mass concentration of 10% for 20h, filtering, and drying at low temperature to obtain a precursor;

adding the precursor, 2500g of heavy alkylbenzene, 40g of oleic acid and 10g of terpene resin into a reaction kettle, reacting for 10 hours at 330 ℃, and then filtering, decompressing and distilling to obtain the oil-soluble ash-removing combustion improver loaded with the iron-copper oxide with the effective concentration of 15%.

Example 7

Adding 100g of carbon black with the particle size of 40-80 nm into 1000g of hydrogen peroxide solution with the mass concentration of 20%, stirring for 4h at 50 ℃, washing and drying, then soaking in 1000g of mixed solution of ferrous acetate with the mass concentration of 8%, magnesium acetate with the mass concentration of 10% and copper acetate with the mass concentration of 6% for 20h, filtering and drying at low temperature to obtain a precursor;

adding the precursor, 2500g of mixed tetramethylbenzene, 40g of oleic acid and 10g of terpene resin dispersant into a reaction kettle, reacting for 10 hours at 330 ℃, and then filtering, decompressing and distilling to obtain the ash removal combustion improver of the oil-soluble loaded iron-magnesium-copper oxide with the effective concentration of 15%.

Comparative example 1

Comparative example 1 is substantially the same as example 5 except that the carbon black used was not modified with hydrogen peroxide and was directly impregnated with a metal salt solution.

Comparative example 2

Comparative example 2 is essentially the same as example 5 except that no modifier, heavy alkylbenzene sulfonic acid, is used in the reaction.

Comparative example 3

Comparative example 3 is essentially the same as example 5 except that the modifier used during the reaction is stearyl alcohol.

Comparative example 4

Comparative example 4 is substantially the same as example 5 except that no terpene resin dispersant is used in the reaction.

Comparative example 5

Comparative example 5 is substantially the same as example 5 except that the dispersant used during the reaction was a Lencolo 1002 polyether dispersant as the type used to disperse the carbon black.

Comparative example 6

The ratio 6 was substantially the same as in example 5, except that the loading was not carried out using carbon black, and the metal salt, the organic solvent, the modifier and the dispersant were directly charged into the reaction vessel to react, to obtain an unsupported oil-soluble metal oxide.

Comparative example 7

Comparative example 7 is substantially the same as example 5 except that the reaction temperature was controlled to 230 ℃.

Comparative example 8

Comparative example 8 is substantially the same as example 5 except that copper acetate having a mass concentration of 10% was used as the impregnation liquid.

Comparative example 9

Comparative example 9 is substantially the same as example 5 except that a mixed solution of magnesium acetate and ferrous acetate having respective mass concentrations of 10% and 10% was used as the impregnation liquid.

Evaluation of the effects:

the samples prepared in examples 1 to 7 and comparative examples 1 to 9 and the commercial heavy oil ash removal combustion improver with the model numbers of ZRJ23 and L4404H were added to 180# heavy oil (manufacturer: Shandong King Cheng) at an amount of 200ppm (by mass).

a. Heavy oil gas turbine deposit determination

The additive heavy oil and the bland heavy oil are added into an Weichai CW200 generating set. Maintaining the same output power of 800kW, disassembling the combustion engine after 7 days of work, taking out the engine valve, ultrasonically cleaning for 3 times by using acetone, drying, and weighing the weight w of the valve₁Initial mass of the valve is w₀Valve deposit Δ W ═ W₁-w₀A larger Δ W indicates a poorer soot cleaning capability of the additive, and vice versa. The results are shown in Table 1.

b. Determination of oil saving ratio

In the combustion engine, blank heavy oil (without ash-removing combustion improver) is firstly added, the oil consumption under the stable working condition is measured and is counted as X, then the oil tank is emptied, the heavy oil (200ppm, the adding rule is the same as the above) of the additive is added, and the oil consumption under the same working condition is measured and is counted as Y. The oil saving rate is calculated according to the following formula:

the results of the fuel saving ratio and the contents of the acidic oxides SOx and NOx in the exhaust gas of each group are shown in table 1.

TABLE 1

Note [1 ]: the ash removal combustion improver prepared in comparative example 6 was added to sample No. 14 at a dosage of 500ppm, and the other samples were all at a dosage of 200 ppm.

It can be seen from the results in table 1 that, after the ash removal combustion improver prepared in examples 1 to 7 is added into heavy oil, the deposit weight of the engine valve and the content of acidic oxides SOx and NOx in the exhaust gas are obviously less than those of blank fuel oil, which indicates that the ash removal combustion improver prepared in examples 1 to 7 can effectively reduce the deposition of combustion products on the valve, play a good role in removing ash, and can significantly reduce the emission of acidic oxides in the exhaust gas and reduce the corrosion of acidic substances to equipment. In addition, the ash removal combustion improver prepared in the embodiment 1 to the embodiment 7 can also effectively improve the combustion efficiency of heavy oil and save the consumption of the heavy oil. The effect of the examples 1-4 is slightly worse than that of the examples 5-7, which may be the reason that the synthesis conditions of the products of the examples 1-4 are not optimized. In contrast, the commercial heavy oil ash removal combustion improver ZRJ23 and L4404H have the functions of reducing combustion deposits of engine valves, saving fuel oil and absorbing acid substances in tail gas, but the overall effect is not as good as that of the ash removal combustion improver prepared in the embodiments 1 to 7.

Comparing the results of example 5 with those of comparative examples 1 to 5, it can be seen that the effects of the prepared product on reducing deposits, saving oil and reducing acidic oxides in tail gas are reduced due to the carbon black not being modified by a strong oxidation type medium, not using a modifier (or not suitable for a modifier), not using a dispersant (or not suitable for a dispersant) and the like.

Comparing the results of example 5 and comparative example 6, it can be seen that the ash removal combustion improver loaded with modified carbon black at the same dosage (200ppm) has better effects on reducing deposits, saving oil and reducing acid oxides in tail gas than the unloaded oil-soluble metal oxide, and the effect is still slightly inferior to that of example 5 by increasing the dosage of the unloaded oil-soluble metal oxide to 500 ppm. This is probably because the loaded ash removal combustion improver has larger surface area, and the additive can be utilized to the maximum extent, thereby exerting better effect.

Comparing the results of example 5 and comparative example 7, it can be seen that the reaction temperature has a large influence on the effect of the product, probably because the transition metal salt is not completely decomposed into the active material metal oxide due to the excessively low reaction temperature during the sample preparation.

Comparing the results of example 5 with those of comparative examples 8 and 9, it can be seen that the effect of the ash removal combustion improver prepared in example 5 is better than that of the products prepared in comparative examples 8 and 9, probably because the impregnation solution used in example 5 is a mixed metal salt solution containing copper salt, and a certain synergistic effect exists between copper oxide and magnesium oxide or ferrous oxide in the products, so that the effect is better than that of the products containing single metal oxide or non-copper metal oxide.

c. Product storage stability

TABLE 2

[2] Note: the product stability is divided into 3 grades, and the product is excellent after being stored for 12 months or more without layering; the product is good when being stored for 3 to 12 months without layering; delamination appeared in less than 3 months of storage and was poor.

As can be seen from table 2, the products prepared in examples 1 to 7 and comparative examples 6 to 9 are excellent in stability, while comparative examples 1 to 5 are poor in storage stability due to the carbon black used in the synthesis being not modified with a strongly oxidizing medium, not using a modifier (or a modifier is not suitable), not using a dispersant (or a dispersant is not suitable), and the like.

d. Water resistance of the product

Taking a certain amount of samples prepared in example 5, comparative example 2 and comparative example 3 and oil-soluble ash removal combustion improver with the model numbers of ZRJ23 and L4404H, adding a certain amount of distilled water, stirring for 1min at room temperature, then carrying out suction filtration under the pressure of 0.01MPa, wherein the aperture of a filter element is 0.8um, and recording the initial suction filtration time t₀And filter element clogging time t₁By t₁-t₀The time delta T required for filtering a certain amount of water-containing product to block the filter element is obtained, the water resistance of the product is represented by the size of delta T, the larger the delta T is, the better the water resistance of the product is, and the reverse is performed.

TABLE 3

As can be seen from the data in table 3, the water resistance of the two commercial products is poor, probably because the commercial products mostly use metal organic acid salt as the main component, and the metal organic acid salt is liable to react with water to form gel-state substance, thus blocking the filter element. The active ingredient of the product is load-modified metal oxide, the organic modifier coated on the surface of the metal oxide can prevent water from penetrating into the particles, and in addition, the metal oxide selected by the invention has relatively good water stability and can not react with water in general, so the water resistance is excellent. While comparative example 2 did not use the modifier, comparative example 3 did not suit the modifier, resulting in a decrease in water resistance.

In conclusion, the ash removal combustion improver has excellent stability and water resistance, can be fully mixed with fuel, has strong adaptability to the fuel, has the functions of corrosion prevention, ash removal and combustion supporting, and is a fuel additive with wide prospect.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The preparation method of the oil-soluble loaded metal oxide ash removal combustion improver is characterized by comprising the following steps of:

a. adding 1 part of carbon black with the particle size of 1-100 nm into 5-15 parts of strong oxidizing medium according to parts by weight, stirring and reacting at 25-60 ℃, and filtering, leaching and drying to obtain the oxidation modified carbon black;

b. dipping the oxidized modified carbon black in a metal salt solution, filtering, and drying at low temperature to obtain an oil-soluble loaded metal oxide precursor, wherein the weight ratio of the oxidized modified carbon black to the metal salt is 1: 0.4-1: 4;

c. adding the oil-soluble loaded metal oxide precursor, 15-50 parts of organic solvent, 0.1-1 part of modifier and 0.05-0.2 part of dispersant into a reaction kettle according to parts by weight, fully reacting at 250-350 ℃, and distilling under reduced pressure after the reaction is finished to obtain the ash removal combustion improver for the oil-soluble loaded metal oxide.

2. The preparation method of the oil-soluble loaded metal oxide deashing combustion improver as claimed in claim 1, wherein the strong oxidizing medium is at least one of a hydrogen peroxide solution with a mass concentration of 5-30% and a nitric acid solution with a mass concentration of 5-25%.

3. The preparation method of the oil-soluble supported metal oxide ash removal combustion improver as claimed in claim 1, wherein the metal salt solution is at least one of salt solutions of iron, cobalt, chromium, magnesium, copper and zinc.

4. The method for preparing the oil-soluble loaded metal oxide ash removal combustion improver as claimed in claim 3, wherein the metal salt solution is a mixed solution of a copper salt solution and at least one of salt solutions of iron, cobalt, chromium, magnesium and zinc.

5. The method for preparing the oil-soluble supported metal oxide ash removal combustion improver as claimed in claim 1, wherein the anion in the metal salt is at least one of acetate ion and nitrate ion.

6. The preparation method of the oil-soluble supported metal oxide ash removal combustion improver as claimed in claim 1, wherein the organic solvent is at least one of aliphatic hydrocarbon solvents or aromatic hydrocarbon solvents.

7. The preparation method of the oil-soluble supported metal oxide ash removal combustion improver as claimed in claim 1, wherein the modifier is at least one of carboxylic acid or sulfonic acid with 12-24 carbon atoms.

8. The method for preparing the oil-soluble loaded metal oxide ash removal combustion improver as claimed in claim 1, wherein the dispersant is at least one of terpene resin and acrylic resin.

9. The use of the oil-soluble loaded metal oxide ash-removing combustion improver as in any one of claims 1 to 8, wherein the oil-soluble loaded metal oxide ash-removing combustion improver is used for preventing corrosion and scaling on the surface of equipment during the combustion of heavy oil or coal, or is used as a combustion improver for promoting the combustion of heavy oil or coal powder.

10. The use method of the oil-soluble loaded metal oxide ash-removing combustion improver as claimed in any one of claims 1 to 8, wherein the addition amount of the oil-soluble loaded metal oxide ash-removing combustion improver in the heavy oil or coal is 50 to 1000ppm by mass.