Gasification system and method for harmlessly treating oily sludge

Abstract

The invention discloses a gasification system and method for harmless treatment of oily sludge, and relates to the technical field of oily sludge treatment, the system comprises an oily sludge drum-type gasification furnace and an oil-gas separation device; wherein the oil sludge drum-type gasification furnace comprises a microwave heating zone I, a microwave heating zone II, an oil sludge inlet pipeline, a high-temperature oil gas outlet pipeline, an oil sludge inlet and an oil sludge drum-type gasification furnace main body; the oil-gas separation equipment comprises a high-temperature oil-gas cooling water pipeline, a gasified tar collecting box, a high-temperature oil-gas pipeline and a tar outlet pipeline. According to the invention, water contained in the oil sludge is heated into water vapor as a gasifying agent, so that high-concentration H2 can be generated, and the synthetic gas obtained by gasification is higher in heat value and higher in utilization value; and three-phase products obtained by gasification can be respectively utilized, so that the resource utilization degree of the oil sludge is improved while harmless treatment of the oil-containing sludge is realized, and the method has higher heat efficiency, high gasification temperature and short heating time consumption, thereby being more energy-saving.

Description

Technical Field

[0001] The invention relates to the technical field of oil sludge treatment, and in particular to a gasification system and method for harmlessly treating oily sludge. Background Art

[0002] Oil sludge is a substance produced during the oil extraction and processing process, mainly composed of crude oil, water, clay sand, biological organic matter, etc. Oil sludge contains substances with bad odor and toxicity such as benzene, phenols, anthracene, pyrene, etc., which seriously threaten the surrounding environment and human survival and health. Oil sludge has been included in the "National Hazardous Waste List" and shall not be discharged without treatment.

[0003] Common methods for treating oily sludge hazardous waste are medium solidification technology and chemical stabilization treatment technology. The most economically valuable medium solidification technology is cement kiln co-treatment, but the flue gas generated by this technology contains volatile heavy metals such as Pb, Zn, and Cd, which requires secondary treatment. Foreign countries mostly use more mature cement solidification technology, but this method has a series of problems such as increased waste volume after treatment, the need to build a new landfill with limited space, and long-term stability risks. Chemical agent stabilization is the use of chemical agents to convert heavy metal ions into low-solubility, low-mobility and low-toxic precipitates or stable complexes through chemical reactions. It has the advantages of small addition amount, good solidification effect, and high long-term stability performance. However, due to the complex composition of domestic hazardous waste and the large fluctuation of hazardous waste composition, it is still difficult to develop a universal stabilizer, and there are still certain problems in large-scale industrial application.

[0004] Depending on the different gasification agents, there are many gasification methods to choose from for oil sludge gasification, including: oxygen gasification, air gasification, and carbon dioxide gasification. Different gasification methods have different preparations of gasification agents and reactions during the gasification process, so the investment cost of the gasification equipment and the gas components obtained by gasification are also different. Oxygen gasification generates less tar and higher quality synthesis gas, but it is necessary to increase the equipment for preparing pure oxygen, which is costly; air gasification has the lowest cost, but air contains a large amount of inert nitrogen, which reduces the calorific value of synthesis gas and affects the further utilization of synthesis gas; although carbon dioxide gasification can make full use of carbon dioxide in the environment, the concentration of carbon dioxide in the atmosphere is only about 0.3%. Some patents mention the use of carbon dioxide in boiler exhaust gas, but according to the reaction formula, even if it is completely burned, its concentration is only equivalent to the volume of O2, and in order to ensure complete combustion, a very high excess air coefficient is required, so the percentage of carbon dioxide in the tail flue will not increase much, and it is necessary to add air separation equipment and carbon dioxide storage equipment, which will greatly increase the cost; for example, patent document CN113307468B discloses "a method and system for treating oily sludge", using carbon dioxide in the tail chimney of the boiler as a gasifying agent. Since fuel combustion requires a large amount of air, N2 in the tail chimney exhaust is still the main component, about 80%, and carbon dioxide is about 20%, and the calorific value of the resulting synthesis gas is low.

[0005] Therefore, developing an effective and harmless equipment and process for treating oily sludge hazardous waste has considerable environmental and economic value. Summary of the invention

[0006] The purpose of the present invention is to provide a gasification system and method for harmlessly treating oily sludge. In view of the problems in the prior art that the water contained in the oil sludge is directly removed and discarded, the cost of preparing the gasifying agent is high or the calorific value of the syngas obtained by gasification is low, an oil sludge treatment device and an oil sludge treatment process are provided. The water in the oil sludge is directly heated by microwave heating zone I to become water vapor as a gasifying agent, and then gasified with the oil sludge to generate syngas, effectively treating the oil sludge while improving the degree of resource utilization. To achieve the above purpose, the present invention provides the following technical solutions:

[0007] The present invention provides a gasification system for harmlessly treating oily sludge, the system comprising: an oily sludge drum gasifier and oil-gas separation equipment; wherein:

[0008] The oil sludge drum type gasifier comprises: a microwave heating zone I, a microwave heating zone II, an oil sludge inlet pipeline, a high-temperature oil and gas outlet pipeline, an oil sludge inlet and an oil sludge drum type gasifier body; wherein,

[0009] A first microwave control device is arranged at the right 1 / 4 of the A surface of the oil sludge drum type gasifier body, which is used to control the regional temperature of the microwave heating zone I; a second microwave control device is arranged at the left 1 / 4 of the B surface of the oil sludge drum type gasifier body, which is used to control the regional temperature of the microwave heating zone II; a circular hole is arranged at the center of the A surface of the oil sludge drum type gasifier body, and the circular hole is connected to one end of the oil sludge inlet pipe, and the other end of the oil sludge inlet pipe is provided with an oil sludge inlet; two circular holes are arranged on the B surface of the oil sludge drum type gasifier body, and the upper circular hole is connected to the oil and gas separation equipment through the high-temperature oil and gas outlet pipe;

[0010] The oil-gas separation equipment includes: a high-temperature oil-gas cooling water pipeline, a gasified tar collection box, a high-temperature oil-gas pipeline and a tar outlet pipeline; wherein,

[0011] The high-temperature oil and gas cooling water pipeline is spirally wound around the outside of the high-temperature oil and gas pipeline. A number of tar outlet pipelines are arranged below the high-temperature oil and gas pipeline. The gasified tar condensed from the high-temperature oil and gas in the high-temperature oil and gas pipeline after cooling is collected into the gasified tar collection box through the tar outlet pipeline.

[0012] Furthermore, the oil sludge drum type gasifier also includes a gasification residue outlet pipe and an oil sludge gasification residue collection box; wherein,

[0013] The circular hole below the B surface of the oil sludge drum type gasifier body is connected to the oil sludge gasification residue collection box through a gasification residue outlet pipe.

[0014] Furthermore, the sludge drum gasifier also includes a sludge booster rod; the sludge booster rod is arranged above the sludge inlet pipe and close to the vertical end of the sludge inlet, and the lower end of the sludge booster rod is consistent with the diameter of the sludge inlet pipe.

[0015] Furthermore, the radius of the circular hole in the central area of ​​the A surface of the main body of the oil mud drum type gasifier is 1 / 3 of the A surface of the main body of the oil mud drum type gasifier.

[0016] Furthermore, the radius of the two circular holes on the B surface of the main body of the oil mud drum type gasifier is the same, and both are 1 / 6 of the B surface of the main body of the oil mud drum type gasifier.

[0017] Furthermore, the length of the oil sludge inlet pipe connected to the circular hole in the central area of ​​the A surface of the main body of the oil sludge drum type gasifier occupies 1 / 4 of the length of the main body of the oil sludge drum type gasifier.

[0018] Furthermore, the oil-gas separation equipment further comprises: a high-temperature oil-gas cooling water inlet valve and a high-temperature oil-gas cooling water outlet valve; wherein,

[0019] The high-temperature oil and gas cooling water inlet valve is arranged at the lower end of the high-temperature oil and gas cooling water pipeline;

[0020] The high-temperature oil and gas cooling water outlet valve is arranged at the upper end of the high-temperature oil and gas cooling water pipeline.

[0021] The present invention also provides a gasification method for harmlessly treating oily sludge, the method comprising the following steps:

[0022] Step S1, adding the oil sludge from the oil sludge inlet through the oil sludge inlet pipe into the oil sludge drum type gasifier body, and using the oil sludge booster rod to boost;

[0023] Step S2, after the oil sludge enters the main body of the oil sludge drum-type gasifier, the microwave control device is turned on, and different temperatures are set in the microwave heating zone I and the microwave heating zone II, so that the moisture in the oil sludge is gasified into water vapor by microwave heating, the oil sludge undergoes carbonization reaction to generate carbonized oil sludge, and the water vapor and the carbonized oil sludge undergo gasification reaction to generate high-temperature oil gas and gasification residue;

[0024] Step S3, the gasification residue is sent to the oil sludge gasification residue collection box through the gasification residue outlet pipe while the main body of the oil sludge drum type gasification furnace is continuously rotating; the high-temperature oil and gas is sent to the high-temperature oil and gas pipeline through the high-temperature oil and gas outlet pipe;

[0025] Step S4, the gasified tar from the high-temperature oil gas after cooling and condensation enters the oil sludge gasification tar collection box through the tar outlet pipeline; the uncooled synthesis gas is sent to the storage device through the synthesis gas outlet pipeline for storage and standby.

[0026] Furthermore, the regional temperature of the microwave heating zone I is controlled at 400-600°C, and the regional temperature of the microwave heating zone II is controlled at 800-1000°C.

[0027] Furthermore, the step S2 also includes: a steam reforming reaction of the water vapor with the methane generated by the decomposition of the oil sludge.

[0028] Technical effects and advantages of the present invention:

[0029] (1) The present invention uses microwave heating to gasify oil sludge, which has higher thermal efficiency than the external heat source heating method (electric heating for heat conduction, heat exchanger for convection heat exchange, etc.) currently used in most pyrolysis or gasification furnaces. In addition, the gasification temperature is high and the heating time is short, so it is more energy-saving.

[0030] (2) The present invention heats the oil sludge itself to convert it into water vapor as a gasifying agent, which can produce high-concentration H2, and the calorific value of the synthesis gas obtained by gasification will also be higher, and it will be more valuable for use; and the three-phase products obtained by gasification can be used separately, thereby achieving harmless treatment of oily sludge and improving the resource utilization of oil sludge.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 A schematic diagram of a gasification system for harmlessly treating oily sludge according to the present invention;

[0034] Figure 2 It is a schematic diagram of the structure of the oil sludge drum type gasifier of the present invention;

[0035] Figure 3 It is a schematic diagram of the A / B surface of the oil sludge drum type gasifier of the present invention;

[0036] Figure 4 It is a schematic diagram of the structure of the oil and gas separation equipment of the present invention;

[0037] In the figure, 1. microwave heating zone I; 2. microwave heating zone II; 3. oil sludge inlet pipeline; 4. high-temperature oil and gas outlet pipeline; 5. gasification residue outlet pipeline; 6. oil sludge gasification residue collection box; 7. oil sludge booster rod; 8. oil sludge inlet; 9. oil sludge drum gasifier body; 10. high-temperature oil and gas cooling water pipeline; 11. high-temperature oil and gas cooling water inlet valve; 12. high-temperature oil and gas cooling water outlet valve; 13. gasification tar collection box; 14. high-temperature oil and gas pipeline; 15. tar outlet pipeline; 16. synthesis gas outlet pipeline. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] The design concept of the present invention includes: the present invention utilizes the water vapor in the oil sludge for gasification to produce high-concentration clean energy H2, and the generated synthesis gas has a higher calorific value and greater utilization value. The microwave heating gasification method is used instead of the traditional electric heating or partition heat exchanger for heating. On the one hand, when the material is raised to the target temperature by the electric heating or partition heat exchanger heating method, the heat transfer is through heat conduction or convection to make the material temperature rise, and the heat is gradually transferred from the surface of the material to the inside of the material. There is a temperature difference between the inside and outside of the material, which inevitably produces a temperature gradient. The outside is easy to overheat and the inside is not heated enough, so that the material is heated unevenly; on the other hand, due to the high density and viscosity of the oil sludge, when the above heating method is used, the volatile matter of the oil sludge is difficult to be fully separated, and the gasification agent and the oil sludge are only in contact with the outer surface, with a small contact area, a small gasification reaction, and a small amount of synthesis gas. When microwave gasification is used, the sludge is placed in a drum-type reaction chamber, the water in the sludge is used as a gasifying agent, and the microwave generator is turned on to emit a microwave electromagnetic field into the reaction chamber. The microwave radiation energy is converted into thermal energy to quickly heat up the chamber, which greatly shortens the time required for heat conduction compared to conventional electric heating. The moisture inside the sludge is converted into water vapor through microwave heating and directly gasifies with the sludge. The formed synthesis gas accumulates continuously and has a "wall-breaking effect" on the sludge, forming holes on the surface of the sludge, which allows the sludge to have more contact area with the gasifying agent, resulting in more reactions and producing more synthesis gas.

[0040] In order to solve the deficiencies of the prior art, the present invention discloses a gasification system for harmlessly treating oily sludge. Figure 1 FIG. 1 is a schematic diagram of a gasification system for harmlessly treating oily sludge according to the present invention. Figure 1 As shown, the system includes: a microwave heating zone I 1, a microwave heating zone II 2, an oil sludge inlet pipeline 3, a high-temperature oil and gas outlet pipeline 4, a gasification residue outlet pipeline 5, an oil sludge gasification residue collection box 6, an oil sludge booster rod 7, an oil sludge inlet 8, an oil sludge drum type gasifier body 9, a high-temperature oil and gas cooling water pipeline 10, a high-temperature oil and gas cooling water inlet valve 11, a high-temperature oil and gas cooling water outlet valve 12, a gasification tar collection box 13, a high-temperature oil and gas pipeline 14, a tar outlet pipeline 15 and a synthesis gas outlet pipeline 16;

[0041] Furthermore, the system is mainly composed of two parts: an oil sludge drum gasifier and an oil-gas separation device. Specifically, Figure 2 Schematic diagram of the oil sludge drum type gasifier structure of the present invention, as shown in Figure 2 As shown, the oil sludge drum type gasifier comprises: a microwave heating zone I 1, a microwave heating zone II 2, an oil sludge inlet pipeline 3, a high temperature oil and gas outlet pipeline 4, a gasification residue outlet pipeline 5, an oil sludge gasification residue collection box 6, an oil sludge booster rod 7, an oil sludge inlet 8 and an oil sludge drum type gasifier body 9; wherein,

[0042] A first microwave control device is arranged at the right 1 / 4 of the A surface of the main body 9 of the oil sludge drum type gasifier, which is used to control the regional temperature of the microwave heating zone I 1, and occupies 1 / 4 of the length of the main body 9 of the oil sludge drum type gasifier; a second microwave control device is arranged at the left 1 / 4 of the B surface of the main body 9 of the oil sludge drum type gasifier, which is used to control the regional temperature of the microwave heating zone II 2. A circular hole is arranged at the center of the A surface of the main body 9 of the oil sludge drum type gasifier, and the size of the circular hole at the center is the same as that of the oil sludge inlet pipe 3; the oil sludge inlet pipe 3 is composed of two sections of bent pipes, and the oil sludge booster rod 7 is arranged at the vertical end of the oil sludge inlet pipe 3, and the sludge upper end of the sludge booster rod 7 can be flexibly pushed to squeeze the oil sludge into the main body 9 of the oil sludge drum type gasifier, to prevent the oil sludge from being blocked in the oil sludge inlet pipe 3; the lower end of the oil sludge booster rod 7 is consistent with the pipe diameter of the oil sludge inlet pipe 3; an oil sludge inlet 8 is also arranged above the vertical end of the oil sludge inlet pipe 3, and a valve is arranged on the oil sludge inlet 8; Figure 3 Schematic diagram of the A / B surface of the oil sludge drum gasifier of the present invention, as shown in Figure 3 As shown, the cross-sections of the A / B surfaces of the oil sludge drum gasifier are both circular, and the oil sludge inlet pipe 3 is welded in the circular hole in the center area of ​​the A surface of the oil sludge drum gasifier body 9, with a radius ratio of 1:3; it occupies 1 / 4 of the length of the oil sludge drum gasifier body 9; its purpose is to form a stable microwave generating area. Two circular holes are set on the B surface of the oil sludge drum gasifier body 9, the upper hole is connected to the oil and gas separation equipment through the high-temperature oil and gas outlet pipe 4, and the lower hole is connected to the oil sludge gasification residue collection box 6 through the gasification residue outlet pipe 5. The diameters of the high-temperature oil and gas outlet pipe 4 and the gasification residue outlet pipe 5 are the same, and both are 1 / 6 of the B surface of the oil sludge drum gasifier body 9.

[0043] Further, Figure 4 Schematic diagram of the oil-gas separation device structure of the present invention, as shown in Figure 4 As shown, the oil-gas separation equipment includes: a high-temperature oil-gas cooling water pipeline 10, a high-temperature oil-gas cooling water inlet valve 11, a high-temperature oil-gas cooling water outlet valve 12, a gasification tar collection box 13, a high-temperature oil-gas pipeline 14, a tar outlet pipeline 15 and a synthesis gas outlet pipeline 16; wherein,

[0044] The high-temperature oil and gas outlet pipeline 4 of the sludge drum gasifier is connected to the high-temperature oil and gas pipeline 14 of the oil and gas separation equipment, and the diameters of the two pipelines are consistent; the high-temperature oil and gas cooling water pipeline 10 is spirally wound around the outside of the high-temperature oil and gas pipeline 14, and the lower end of the high-temperature oil and gas cooling water pipeline 10 is provided with a high-temperature oil and gas cooling water inlet valve 11, and the upper end is provided with a high-temperature oil and gas cooling water outlet valve 12; a number of tar outlet pipelines 15 are provided below the high-temperature oil and gas pipeline 14, and the tar in the high-temperature oil and gas pipeline 14 is collected into the gasification tar collection box 13 through the tar outlet pipeline 15; a synthesis gas outlet pipeline 16 is also connected to one end of the high-temperature oil and gas pipeline 14 close to the high-temperature oil and gas cooling water inlet valve 11, which is used to collect the uncooled synthesis gas and send it to the storage device for storage and standby.

[0045] The present invention discloses a gasification method for harmlessly treating oily sludge, the method comprising the following steps:

[0046] Step S1, add the sludge from the sludge inlet 8 through the sludge inlet pipe 3 into the sludge drum type gasifier body 9. Since the sludge is very viscous, in order to prevent the sludge from being blocked in the sludge inlet pipe 3, a sludge booster rod 7 is introduced. The sludge booster rod 7 can be driven by a motor or pushed by a hydraulic pressure to squeeze the sludge into the sludge drum type gasifier body 9.

[0047] Step S2, after the oil sludge enters the main body 9 of the oil sludge drum type gasifier, the microwave control device is turned on to set different temperatures for the microwave heating zone I 1 and the microwave heating zone II 2, wherein the temperature of the microwave heating zone I 1 is controlled at 400-600°C, and pyrolysis is mainly performed in this section; the temperature of the microwave heating zone II 2 is controlled at 800-1000°C, and gasification is mainly performed in this section. The gasifying agent is H2O contained in the oil sludge itself, and the moisture in the oil sludge is gasified into water vapor through microwave heating, and the oil sludge undergoes carbonization reaction at high temperature, and the water vapor undergoes gasification reaction with the carbonized oil sludge to generate a large amount of high calorific value H2 and CO, and the water vapor can also undergo water vapor recombination reaction with the methane produced by the decomposition of the oil sludge.

[0048] Step S3, there are two products after the oil sludge is gasified, namely, high-temperature oil gas and gasification residue, wherein the gasification residue is sent to the oil sludge gasification residue collection box 6 through the gasification residue outlet pipe 5 under the continuous rotation of the oil sludge drum type gasification furnace body 9; the high-temperature oil gas is sent to the high-temperature oil gas pipeline 14 through the high-temperature oil gas outlet pipe 4. The oil and gas separation equipment is composed of the high-temperature oil and gas pipeline 14 and the high-temperature oil and gas cooling water pipeline 10 spirally wound on the outside thereof. When working, the high-temperature oil and gas cooling water inlet valve 11 and the high-temperature oil and gas cooling water outlet valve 12 are opened to ensure that cooling water passes through the high-temperature oil and gas cooling water pipeline 10 to cool the high-temperature oil and gas.

[0049] Step S4, the gasified tar after cooling and condensation enters the oil sludge gasification tar collection box 13 through the tar outlet pipe 15. The tar in the oil sludge gasification tar collection box 13 can be used for various purposes, such as fuel and raw materials for chemical products. The uncooled synthesis gas (referring to the synthesis gas generated by the steam recombination reaction of high-temperature oil gas and / or water vapor with methane generated by the decomposition of oil sludge) is sent to the storage device through the synthesis gas outlet pipe 16 for storage and standby. Finally, the gasification product of oil sludge is fully utilized, and the hazardous waste of oil sludge is effectively treated while improving the resource utilization rate of oil sludge.

[0050] In summary, compared with the current technology, the present invention utilizes a large amount of oil sludge generated in the oil field production process, and uses the water contained in the oil sludge as the gasifier to gasify the oil sludge by microwave heating, which can reduce the investment cost of gasifier preparation and storage equipment, and at the same time produce synthesis gas with higher calorific value.

[0051] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gasification system for harmlessly treating oily sludge, characterized in that: The system comprises: an oil sludge drum type gasifier and oil-gas separation equipment; wherein, The oil sludge drum type gasifier comprises: a microwave heating zone I (1), a microwave heating zone II (2), an oil sludge inlet pipeline (3), a high-temperature oil and gas outlet pipeline (4), an oil sludge inlet (8) and an oil sludge drum type gasifier body (9); wherein: A first microwave control device is arranged at the right 1 / 4 of the A surface of the oil sludge drum type gasification furnace body (9), which is used to control the regional temperature of the microwave heating zone I (1); a second microwave control device is arranged at the left 1 / 4 of the B surface of the oil sludge drum type gasification furnace body (9), which is used to control the regional temperature of the microwave heating zone II (2); a circular hole is arranged at the center of the A surface of the oil sludge drum type gasification furnace body (9), and the circular hole is connected to one end of the oil sludge inlet pipe (3), and the other end of the oil sludge inlet pipe (3) is provided with an oil sludge inlet (8); two circular holes are arranged on the B surface of the oil sludge drum type gasification furnace body (9), and the upper circular hole is connected to the oil and gas separation equipment through the high-temperature oil and gas outlet pipe (4); The oil-gas separation equipment comprises: a high-temperature oil-gas cooling water pipeline (10), a gasified tar collection box (13), a high-temperature oil-gas pipeline (14) and a tar outlet pipeline (15); wherein, The high-temperature oil and gas cooling water pipeline (10) is spirally wound around the outside of the high-temperature oil and gas pipeline (14), and a plurality of tar outlet pipelines (15) are arranged below the high-temperature oil and gas pipeline (14). The gasified tar condensed from the high-temperature oil and gas in the high-temperature oil and gas pipeline (14) after cooling is collected into the gasified tar collection box (13) through the tar outlet pipeline (15).

2. A gasification system for harmlessly treating oily sludge according to claim 1, characterized in that: The oil sludge drum type gasifier further comprises a gasification residue outlet pipe (5) and an oil sludge gasification residue collection box (6); wherein, The circular hole below the B surface of the oil sludge drum type gasifier body (9) is connected to the oil sludge gasification residue collection box (6) through the gasification residue outlet pipe (5).

3. A gasification system for harmlessly treating oily sludge according to claim 1 or 2, characterized in that: The sludge drum type gasifier further comprises a sludge booster rod (7); the sludge booster rod (7) is arranged above the sludge inlet pipe (3) and at a vertical end close to the sludge inlet (8), and the lower end of the sludge booster rod (7) matches the pipe diameter of the sludge inlet pipe (3).

4. A gasification system for harmlessly treating oily sludge according to claim 3, characterized in that: The radius of the circular hole in the central area of ​​the A surface of the oil sludge drum type gasifier body (9) is 1 / 3 of the A surface of the oil sludge drum type gasifier body (9).

5. A gasification system for harmlessly treating oily sludge according to claim 4, characterized in that: The radius of the two circular holes on the B surface of the oil sludge drum type gasifier body (9) is the same, and both are 1 / 6 of the B surface of the oil sludge drum type gasifier body (9).

6. The gasification system for harmlessly treating oily sludge according to claim 1 is characterized in that: The length of the oil sludge inlet pipe (3) connected to the circular hole in the central area of ​​the A surface of the oil sludge drum type gasifier body (9) accounts for 1 / 4 of the length of the oil sludge drum type gasifier body (9).

7. A gasification system for harmlessly treating oily sludge according to claim 1 or 2, characterized in that: The oil-gas separation equipment further comprises: a high-temperature oil-gas cooling water inlet valve (11) and a high-temperature oil-gas cooling water outlet valve (12); wherein, The high-temperature oil and gas cooling water inlet valve (11) is arranged at the lower end of the high-temperature oil and gas cooling water pipeline (10); The high-temperature oil and gas cooling water outlet valve (12) is arranged at the upper end of the high-temperature oil and gas cooling water pipeline (10).

8. A gasification method for harmlessly treating oily sludge, the method adopting the system of claims 1-7, characterized in that: The method comprises the following steps: Step S1, adding the oil sludge from the oil sludge inlet (8) through the oil sludge inlet pipe (3) into the oil sludge drum type gasifier body (9), and using the oil sludge booster rod (7) for boosting; Step S2, after the oil sludge enters the oil sludge drum-type gasification furnace body (9), the microwave control device is turned on to set different temperatures in the microwave heating zone I (1) and the microwave heating zone II (2), so that the moisture in the oil sludge is gasified into water vapor by microwave heating, the oil sludge undergoes a carbonization reaction to generate carbonized oil sludge, and the water vapor and the carbonized oil sludge undergo a gasification reaction to generate high-temperature oil gas and gasification residue; Step S3, the gasified residue is sent to the oil sludge gasified residue collection box (6) through the gasified residue outlet pipe (5) while the main body (9) of the oil sludge drum type gasifier is continuously rotating; the high-temperature oil and gas is sent to the high-temperature oil and gas pipeline (14) through the high-temperature oil and gas outlet pipe (4); Step S4: The gasified tar obtained by cooling and condensing the high-temperature oil gas enters the oil sludge gasified tar collection box (13) through the tar outlet pipeline (15); the uncooled synthesis gas is sent to the storage device through the synthesis gas outlet pipeline (16) for storage and standby.

9. A gasification method for harmlessly treating oily sludge according to claim 8, characterized in that: The temperature of the microwave heating zone I (1) is controlled at 400-600°C, and the temperature of the microwave heating zone II (2) is controlled at 800-1000°C.

10. A gasification method for harmlessly treating oily sludge according to claim 8 or 9, characterized in that: The step S2 also includes: steam reforming reaction of the water vapor with methane generated by decomposition of the oil sludge.

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