Oil-containing solid waste disposal system and method

Abstract

The present invention discloses a system and method for disposing oil-containing solid waste, the system comprising: an oil sludge pool, a hot washing device, a settling tank, a centrifugal device, a mixing treatment device and a combustion device, the oil sludge pool is connected to the hot washing device to transport the oil-containing sludge, the hot washing device is connected to the settling tank, the settling tank is used to settle the oil-containing sludge after hot washing, the settling tank is connected to the centrifugal device, the centrifugal device is used to centrifugally separate the upper oil liquid, the settling tank and the centrifugal device are both connected to the mixing treatment device, the mixing treatment device is used to make the lower sludge and the solid residue separated by centrifugation form dried oil sludge coal, and the centrifugal device and the mixing treatment device are both connected to the combustion device. The oil-containing solid waste disposal system of the embodiment of the present invention divides the oil-containing sludge into liquid fuel and solid fuel through the hot washing device, the settling tank, the centrifugal device and the mixing treatment device, and then transports it to the combustion device for combustion by the combustion device, thereby realizing the disposal and utilization of the oil-containing sludge.

Description

Technical Field

[0001] The present invention relates to the technical field of solid waste disposal, and in particular to a system and method for disposing oil-containing solid waste. Background Art

[0002] Oil sludge is one of the main pollutants in oil and industrial and transportation oil-related fields such as oil field mining, oil refining process, transportation, utilization, storage, etc. Oil-containing solid waste should be reduced, resourced and harmlessly disposed. Related technologies use oil-containing solid waste solvent extraction, thermochemical washing, pyrolysis, incineration, biological methods and comprehensive utilization to dispose of oil sludge. Due to the different sources of oil sludge, the properties are quite different, the by-products produced during the treatment process are complex, and the different properties of oil-containing solid waste determine the differences in treatment processes. At present, the cost of oil-containing solid waste treatment processes is high and the universality is low. Among them, the incineration method uses a special hazardous waste incineration boiler to burn all harmful substances at high temperature to achieve harmless discharge, but the incineration method has high equipment investment and operation costs, and the disposal cost is 1,500 to 2,000 yuan / ton, which limits the amount of oil sludge treatment and cannot be applied on a large scale. In view of the complex source of oil-containing sludge and the difference in material shape from coal, thermal power plants urgently need an adaptive disposal method for co-burning oil-containing sludge materials. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides an economical, environmentally friendly and highly adaptable oil-containing solid waste disposal system.

[0005] An embodiment of the present invention further provides a method for disposing oily solid waste using the above-mentioned oily solid waste disposal system.

[0006] The oil-containing solid waste disposal system of the embodiment of the present invention includes: an oil sludge pool, a hot washing device, a sedimentation tank, a centrifugal device, a mixing treatment device and a combustion device, the oil sludge pool is connected to the hot washing device to transport the oil-containing sludge to the hot washing device for hot washing, the hot washing device is connected to the sedimentation tank to transport the oil-containing sludge after hot washing to the sedimentation tank for sedimentation and stratification, the sedimentation tank is connected to the centrifugal device to transport the upper oil liquid in the sedimentation tank to the centrifugal device for centrifugal separation, the sedimentation tank and the centrifugal device are both connected to the mixing treatment device, the mixing treatment device is used to mix the lower layer of sludge in the sedimentation tank and the solid residue centrifugally separated by the centrifugal device to form dried oil sludge coal, the centrifugal device is connected to the combustion device to transport the oil centrifugally separated by the centrifugal device to the combustion device for combustion, and the mixing treatment device is connected to the combustion device to transport the dried oil sludge coal to the combustion device for combustion.

[0007] The oil-containing solid waste disposal system of the embodiment of the present invention separates the oil-containing sludge into liquid fuel and solid fuel through a hot washing device, a sedimentation tank, a centrifugal device and a mixing treatment device, and then transports the liquid fuel and solid fuel to a combustion device for combustion, thereby realizing the disposal and utilization of the oil-containing sludge.

[0008] In some embodiments, the hot washing device includes a hot washing tank and a dosing bin, the sludge tank, the dosing bin and the sedimentation tank are all connected to the hot washing tank, and a grille, a steam coil and a stirring assembly are provided in the hot washing tank.

[0009] In some embodiments, a sludge bin is also included, and the sedimentation tank and the mixing treatment device are both connected to the sludge bin.

[0010] In some embodiments, the centrifugal device includes a centrifuge and an oil tank and a solid slag bin respectively connected to the centrifuge, the oil tank is also connected to the combustion device, and the solid slag bin is also connected to the mixing processing device.

[0011] In some embodiments, the mixing and processing device includes a mixer and an evaporation platform, the mixer has a solid-phase sludge feed port, a raw coal feed port, a desiccant feed port and a discharge port, the sludge bin and the solid slag bin are both connected to the solid-phase sludge feed port, and the discharge port is connected to the evaporation platform.

[0012] In some embodiments, the combustion device includes a coal-fired boiler and a burner arranged on the coal-fired boiler, the evaporation platform is connected to the coal-fired boiler, and the oil tank is connected to the burner.

[0013] In some embodiments, a coal conveyor belt device is further included, and the evaporation platform is connected to the coal-fired boiler via the coal conveyor belt device.

[0014] In some embodiments, a flue gas purification device and a slag remover are further included. The coal-fired boiler has an exhaust port and a slag removal port. The exhaust port is connected to the flue gas purification device, and the slag removal port is connected to the slag removal machine.

[0015] The oil-containing solid waste disposal method of the embodiment of the present invention is used in the oil-containing solid waste disposal system described in any one of the above embodiments, and the method includes: conveying the oil-containing sludge stored in the oil sludge pool to the hot washing device for hot washing, and conveying the oil-containing sludge after hot washing to the sedimentation tank for sedimentation and stratification; conveying the upper layer of oil in the sedimentation tank to the centrifugal device for centrifugal separation, and conveying the lower layer of sludge in the sedimentation tank and the solid residue centrifugally separated by the centrifugal device to the mixing treatment device for mixing treatment to form dried oil sludge coal; conveying the oil centrifugally separated by the centrifugal device and the dried oil sludge coal produced by the mixing treatment device to the combustion device for mixed combustion.

[0016] In some embodiments, the middle layer water in the sedimentation tank is pumped back to the hot washing device for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of an oil-containing solid waste disposal system according to an embodiment of the present invention.

[0018] Reference numerals:

[0019] Oil sludge pool 1,

[0020] Hot washing device 2, hot washing tank 201, dosing bin 202,

[0021] Sedimentation tank 3, sludge bin 31,

[0022] Centrifugal device 4, centrifuge 401, oil tank 402, solid slag bin 403,

[0023] Mixing device 5, coal conveying belt device 51, mixer 501, evaporation platform 502,

[0024] Combustion device 6, coal-fired boiler 601, burner 602,

[0025] Flue gas purification device 7, chimney 71, slag scoop machine 8. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] The oil-containing solid waste disposal system according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0028] like Figure 1 As shown, the oil-containing solid waste disposal system of the embodiment of the present invention includes: an oil sludge pool 1, a hot washing device 2, a sedimentation tank 3, a centrifugal device 4, a mixing treatment device 5 and a combustion device 6.

[0029] The oil sludge tank 1 is connected to the hot washing device 2 to transport the oily sludge to the hot washing device 2 for hot washing, and the hot washing device 2 is connected to the settling tank 3 to transport the oily sludge after hot washing to the settling tank 3 for sedimentation and stratification. The settling tank 3 is connected to the centrifugal device 4 to transport the upper oil liquid in the settling tank 3 to the centrifugal device 4 for centrifugal separation, and the settling tank 3 and the centrifugal device 4 are both connected to the mixing treatment device 5. The mixing treatment device 5 is used to mix the lower sludge in the settling tank 3 and the solid residue separated by the centrifugal device 4 to form dried oily sludge coal. The centrifugal device 4 is connected to the combustion device 6 to transport the oil separated by the centrifugal device 4 to the combustion device 6 for combustion, and the mixing treatment device 5 is connected to the combustion device 6 to transport the dried oily sludge coal to the combustion device 6 for combustion.

[0030] It is understandable that the oil sludge pool 1 is used to store oily sludge. The hot washing device 2 is used to perform hot washing treatment on the oily sludge to facilitate subsequent solid-liquid separation. The oily sludge after hot washing is settled and stratified in the sedimentation tank 3, and the stratification in the sedimentation tank 3 is an upper layer of oil, a middle layer of water and a lower layer of bottom mud. The upper layer of oil is then centrifuged by a centrifugal device 4 to separate the oil and solid residue, and the oil is transported to the combustion device 6, while the lower layer of bottom mud in the sedimentation tank 3 and the solid residue separated by centrifugation are transported to the mixing treatment device 5 for mixing treatment to form dried oily sludge coal and then transported to the combustion device 6, and the oil and dried oily sludge coal can be mixed and burned in the combustion device 6 at the same time.

[0031] Moreover, the combustion device 6 is a coal-fired component for a thermal power plant, rather than a dedicated hazardous waste incineration boiler. Compared with the equipment investment and operation costs of the incineration method, the oil-containing solid waste disposal system of the embodiment of the present invention has a lower cost and also realizes the cogeneration of heat and power in the thermal power plant. It should be understood that if the oil-containing sludge is directly transported to the coal-fired component for combustion in a thermal power plant, there will be problems such as feed blockage and incomplete combustion. Therefore, the oil-containing solid waste disposal system of the embodiment of the present invention also solves the problem that the oil-containing sludge cannot be fed.

[0032] Therefore, the oil-containing solid waste disposal system of the embodiment of the present invention separates the oil-containing sludge into liquid fuel and solid fuel through the hot washing device 2, the sedimentation tank 3, the centrifugal device 4 and the mixing treatment device 5, and then transports the oil-containing sludge to the combustion device 6 for combustion, thereby realizing the disposal and utilization of the oil-containing sludge.

[0033] In some embodiments, Figure 1 As shown, the hot washing device 2 includes a hot washing tank 201 and a dosing bin 202. The sludge pool 1, the dosing bin 202 and the sedimentation tank 3 are all connected to the hot washing tank 201. The hot washing tank 201 is provided with a grille, a steam coil and a stirring assembly.

[0034] Optionally, the oily sludge from the oily sludge pool 1 to the hot washing pool 201 can be transported by a scraper to scrape the oily sludge into the hot washing pool 201. The grille provided at the top of the hot washing pool 201 has an opening smaller than 10 mm, so that the oily sludge transported from the oily sludge pool 1 to the hot washing pool 201 can be separated from materials with a size larger than 10 mm by the grille.

[0035] The steam coil is connected to an external heat source to heat the water in the hot washing tank 201 to ensure that the water temperature in the hot washing tank 201 is controlled at 60-70° C. The dosing bin 202 feeds sodium silicate and polyacrylamide into the hot washing tank 201, and the dosage is 1% of the amount of oily sludge fed.

[0036] The stirring component can adopt a paddle-type or slide-type stirring method. The stirring component is used to enhance the mixing of materials in the hot washing tank 201, and the mixing and stirring time of the stirring component is 30 minutes.

[0037] In some embodiments, Figure 1 As shown, it also includes a sludge bin 31, and the sedimentation tank 3 and the mixing treatment device 5 are both connected to the sludge bin 31.

[0038] It can be understood that the upper layer of the sedimentation tank 3 is oil, the middle layer of the sedimentation tank 3 is water, and the lower layer of the sedimentation tank 3 is sludge. The oil is transported to the centrifugal device 4 for further centrifugal separation, the water is transported back to the hot wash tank 201 for recycling, the sludge is transported to the sludge bin 31 for storage, and the sludge in the sludge bin 31 is transported to the mixing treatment device 5 for subsequent mixing treatment.

[0039] In some embodiments, Figure 1 As shown, the centrifugal device 4 includes a centrifuge 401 and an oil tank 402 and a solid slag bin 403 respectively connected to the centrifuge 401 . The oil tank 402 is also connected to the combustion device 6 , and the solid slag bin 403 is also connected to the mixing treatment device 5 .

[0040] It is understandable that the centrifuge 401 centrifuges the oil delivered from the sedimentation tank 3, the liquid delivered to the oil tank 402 for storage, and the solid residue delivered to the solid residue bin 403 for storage. Then, the liquid stored in the oil tank 402 is delivered to the combustion device 6 for combustion, and the solid residue stored in the solid residue bin 403 is delivered to the mixing device 5 and mixed with the bottom mud delivered from the bottom mud bin 31 for treatment.

[0041] In some embodiments, Figure 1 As shown, the mixing and processing device 5 includes a mixer 501 and an evaporation platform 502. The mixer 501 has a solid-phase sludge feed port, a raw coal feed port, a desiccant feed port and a discharge port. The bottom sludge bin 31 and the solid slag bin 403 are both connected to the solid-phase sludge feed port, and the discharge port is connected to the evaporation platform 502.

[0042] Among them, the sludge in the sludge bin 31 and the solid slag in the solid slag bin 403 are both transported to the mixer 501 through the solid phase sludge feed port. For the convenience of description, the mixed sludge and solid slag are referred to as sludge solid slag. The raw coal feed port is used to feed raw coal into the mixer 501, and the desiccant feed port is used to feed desiccant (the components of the desiccant include quicklime, ash, and modifier A) into the mixer 501. That is, the sludge solid slag, raw coal, and desiccant are stirred and mixed in the mixer 501, and the ratio of the three is 10-20% of sludge solid slag, 80-90% of raw coal, and 3-10% of desiccant.

[0043] Furthermore, the oil sludge solid residue, raw coal and desiccant are fully stirred and mixed in the mixer 501 to form oil sludge coal fuel, and then the oil sludge coal fuel is transported to the evaporation platform 502 for evaporation, thereby obtaining dried oil sludge coal with a water content of less than 35% and an oil content of less than 5%. The evaporation method can be natural evaporation for 2-3 days.

[0044] Thus, the liquid fuel of the combustion device 6 is the liquid separated by centrifugation, and the solid fuel of the combustion device 6 is the mixed evaporated dried oily sludge. The oily solid waste disposal system of the embodiment of the present invention mixes the oily sludge solid residue after hot washing separation with the raw coal and the drying agent to produce the oily sludge, which reduces the moisture content of the oily sludge after the natural evaporation process, further reduces the viscosity of the fuel and increases the calorific value of the fuel.

[0045] In some embodiments, Figure 1 As shown, the combustion device 6 includes a coal-fired boiler 601 and a burner 602 disposed on the coal-fired boiler 601, the evaporation platform 502 is connected to the coal-fired boiler 601, and the oil tank 402 is connected to the burner 602. It can be understood that the dried oily sludge is transported to the coal-fired boiler 601, and the liquid oil is transported to the burner 602.

[0046] Optionally, the burner 602 is arranged on the furnace wall of the coal-fired boiler 601, and the liquid oil is fed into the coal-fired boiler 601 through the burner 602 for combustion, and the burner 602 has an air distribution structure to adjust the air volume through primary air distribution.

[0047] Furthermore, it also includes a coal conveyor belt device 51, and the evaporation platform 502 is connected to the coal-fired boiler 601 through the coal conveyor belt device 51. The dried oily mud is fed into the coal-fired boiler 601 through the coal conveyor belt device 51 for mixing and burning, and the liquid oil and water in the oil tank 402 is fed into the coal-fired boiler 601 through the burner 602 for mixing and burning.

[0048] In some embodiments, Figure 1As shown, the coal-fired boiler 601 also includes a flue gas purification device 7 and a slag remover 8. The coal-fired boiler 601 has an exhaust port and a slag removal port. The exhaust port is connected to the flue gas purification device 7, and the slag removal port is connected to the slag remover 8. It can be understood that the ash and slag after incineration of the coal-fired boiler 601 falls to the slag remover 8, the flue gas after incineration enters the flue gas purification device 7 for treatment, and the qualified tail gas is discharged to the atmosphere through the chimney 71.

[0049] Specifically, the flue gas purification device 7 adopts a flue gas SCR denitrification + desulfurization + electric bag dust removal combination, the dioxin emission standard is less than 0.1ng TEQ / Nm3, and the particulate matter emission standard is less than 10mg / Nm3.

[0050] Therefore, the oil liquid fuel and the dried oil sludge coal are respectively sent to the coal-fired boiler 601 for mixed combustion, and the high temperature of 1500℃ in the furnace completely burns the oil-containing hazardous waste and harmful substances, and the flue gas passes through the existing denitrification, desulfurization, and dust removal purification devices to meet the emission standards. In addition, the combustion temperature and flue gas purification standards of the coal-fired boiler 601 are better than those of special hazardous waste incinerators.

[0051] The following describes a method for disposing oil-containing solid waste according to an embodiment of the present invention.

[0052] The oil-containing solid waste disposal method of the embodiment of the present invention is used in the oil-containing solid waste disposal system in any of the above embodiments, and the method comprises: transporting the oil-containing sludge stored in the oil sludge pool 1 to the hot washing device 2 for hot washing, and transporting the hot-washed oil-containing sludge to the sedimentation tank 3 for sedimentation and stratification. The upper layer of oil in the sedimentation tank 3 is transported to the centrifugal device 4 for centrifugal separation, and the lower layer of sludge in the sedimentation tank 3 and the solid residue separated by centrifugal device 4 are transported to the mixing treatment device 5 for mixing treatment to form dried oil sludge. The oil separated by centrifugal device 4 and the dried oil sludge produced by the mixing treatment device 5 are transported to the combustion device 6 for mixed combustion. In addition, the middle layer of water in the sedimentation tank 3 is pumped back to the hot washing device 2 for recycling.

[0053] Specifically, the oily sludge is scraped out of the oily sludge pool 1 by a scraper. The scraper outputs 15 tons of oily sludge per hour and transports the oily sludge to the hot washing pool 201 .

[0054] The material blocks larger than 10 mm are separated by the grid installed on the top of the hot washing tank 201. The hot washing tank 201 operates at normal pressure, the water washing temperature ranges from 60 to 70°C, and the temperature is controlled by indirect heating of the steam coil. A total of 150 kg of sodium silicate, polyacrylamide, and demulsifier are fed into the dosing bin 202, and then the materials are mixed and stirred by the stirring assembly, and the stirring time is greater than 30 minutes.

[0055] The liquid oily sludge after hot washing is pumped into the sedimentation tank and left to stand for 2 hours. The lower sludge in the sedimentation tank 3 is fed into the sludge bin 31 at a speed of 6 tons / hour, the middle water in the sedimentation tank 3 is pumped back to the hot washing tank 201 at a speed of 21 tons / hour for recycling, and the upper oil in the sedimentation tank 3 is pumped into the centrifuge 401 at a speed of 3 tons / hour for centrifugal separation, the separated liquid is sent to the oil tank 402, and the separated solid residue is sent to the solid residue bin 403.

[0056] The solid oil sludge in the solid slag bin 403 and the bottom sludge bin 31 is fed into the mixer 501 and mixed with the raw coal and the desiccant to produce oily sludge coal, and the ratio of the oily sludge solid slag, the raw coal and the desiccant is 15%:80%:5%. Then, the oily sludge coal is stored on the evaporation platform 502 for 2-3 days for natural evaporation to obtain dried oily sludge coal with a moisture content of less than 30% and an oil content of less than 5%.

[0057] The dried oily sludge stored in the evaporation platform 502 is fed into the 600MW coal-fired boiler 601 for combustion through the coal conveyor belt device 51, and the liquid oil and water in the oil tank 402 is fed into the coal-fired boiler 601 for combustion through the burner 602. The air volume is adjusted through primary air distribution to ensure that the excess air coefficient of the boiler furnace is 1.2.

[0058] Furthermore, the ash from the coal-fired boiler 601 falls to the slag scoop 8, and the flue gas after incineration enters the flue gas purification device 7 for treatment, and the qualified tail gas is discharged to the atmosphere through the chimney 71. The flue gas purification device 7 adopts a combination of flue gas SCR denitrification + wet desulfurization + electric bag dust removal, and the dioxin emission standard is less than 0.1ng TEQ / Nm3, and the particulate matter emission standard is less than 10mg / Nm3.

[0059] In summary, the method for disposing of oil-containing solid waste in the embodiment of the present invention realizes thermal cleaning of the oil-containing sludge through the hot washing tank 201 and the sedimentation tank 3, and utilizes the centrifuge 401 to separate the solid phase fuel and the liquid phase fuel of the oil-containing sludge, and divides the oil-containing sludge into two types of fuel, solid and liquid, which are fed into the coal-fired boiler 601 for incineration respectively, thereby effectively solving the problem that the coal-fired boiler 601 cannot be fed due to the viscosity of the oil-containing sludge.

[0060] In addition, the oil sludge solid residue after hot washing separation is mixed with raw coal and a drying agent to produce oil sludge coal, which is then naturally evaporated to reduce the moisture content of the oil sludge coal, further reducing the viscosity of the fuel and increasing the calorific value of the fuel.

[0061] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0065] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A method for disposing oily solid waste, characterized in that: The oil-containing solid waste disposal method includes: Oil sludge pool; A hot washing device, the oil sludge tank is connected to the hot washing device to transport the oily sludge to the hot washing device for hot washing, the hot washing device comprises a hot washing tank and a dosing bin, and a grille, a steam coil and a stirring assembly are arranged in the hot washing tank; A settling tank, wherein the hot washing device is connected to the settling tank to transport the oily sludge after hot washing to the settling tank for settling and stratification, and the oil sludge tank, the dosing bin and the settling tank are all connected to the hot washing tank; A centrifugal device, the sedimentation tank is connected to the centrifugal device to transport the upper oil in the sedimentation tank to the centrifugal device for centrifugal separation, and the centrifugal device includes a centrifuge and an oil tank and a solid slag bin respectively connected to the centrifuge; A mixing treatment device, the sedimentation tank and the centrifugal device are both connected to the mixing treatment device, the mixing treatment device is used to mix the lower layer of sludge in the sedimentation tank and the solid slag separated by the centrifugal device to form dried oily sludge coal, the mixing treatment device includes a mixer and an evaporation platform, the mixer has a solid-phase oily sludge feed port, a raw coal feed port, a desiccant feed port and a discharge port, the sludge bin and the solid slag bin are both connected to the solid-phase oily sludge feed port, and the discharge port is connected to the evaporation platform; A sediment bin, the sedimentation tank and the mixing treatment device are both connected to the sediment bin; A combustion device, wherein the centrifugal device is connected to the combustion device to transport the oil separated by the centrifugal device to the combustion device for combustion, the mixing device is connected to the combustion device to transport the dried oily sludge to the combustion device for combustion, the combustion device is a coal-fired component for a thermal power plant, the combustion device comprises a coal-fired boiler and a burner arranged on the coal-fired boiler, the evaporation platform is connected to the coal-fired boiler, the oil tank is connected to the burner, the oil tank is also connected to the combustion device, and the solid slag bin is also connected to the mixing device; A coal conveyor belt device, through which the evaporation platform is connected to the coal-fired boiler; A flue gas purification device and a slag remover, wherein the coal-fired boiler has an exhaust port and a slag removal port, the exhaust port is connected to the flue gas purification device, and the slag removal port is connected to the slag removal machine; The oil-containing solid waste disposal method comprises the following steps: The oily sludge stored in the oily sludge pool is transported to the hot washing device for hot washing, and the oily sludge after hot washing is transported to the sedimentation tank for sedimentation and stratification; The upper layer of oil in the settling tank is transported to the centrifugal device for centrifugal separation, and the lower layer of sludge in the settling tank and the solid residue separated by the centrifugal device are transported to the mixing treatment device for mixing treatment to form dried oil sludge coal; The oil liquid centrifugally separated by the centrifugal device and the dried oil peat produced by the mixing treatment device are transported to the combustion device for mixed combustion; The oily sludge is scraped out of the oily sludge tank by a scraper, and the oily sludge is transported to the hot washing tank; The material blocks larger than 10 mm are separated by the grid installed on the top of the hot washing tank. The hot washing tank is operated at normal pressure, the water washing temperature ranges from 60 to 70°C, and the temperature is controlled by indirect heating by a steam coil. A total of 150 kg of sodium silicate, polyacrylamide, and demulsifier are fed into the dosing bin, and then the materials are mixed and stirred by a stirring component for more than 30 minutes. The liquid oily sludge after hot washing is pumped into the sedimentation tank at a speed of 6 tons / hour, and is left to stand for 2 hours. The lower sludge in the sedimentation tank is fed into the sludge bin, and the middle water in the sedimentation tank is pumped back to the hot washing tank for recycling at a speed of 21 tons / hour. The upper oil in the sedimentation tank is pumped into the centrifuge for centrifugal separation, and the separated liquid is sent to the oil tank, and the separated solid residue is sent to the solid residue bin; The solid oil sludge in the solid slag bin and the bottom sludge bin is fed into the mixer and mixed with raw coal and a desiccant to produce oily sludge coal, and the ratio of oily sludge solid sludge, raw coal and desiccant is 15%:80%:5%. Then, the oily sludge coal is stored on the evaporation platform for 2-3 days for natural evaporation to obtain dried oily sludge coal with a moisture content of less than 30% and an oil content of less than 5%. The dried oily sludge stored in the evaporation platform is fed into the coal-fired boiler for combustion through the coal conveyor belt device, and the liquid oil and water in the oil tank is fed into the coal-fired boiler for combustion through the burner, and the air volume is adjusted through primary air distribution to ensure that the excess air coefficient of the boiler furnace is 1.2; The ash after incineration in the coal-fired boiler falls to the slag remover, and the flue gas after incineration enters the flue gas purification device for treatment, and the qualified exhaust gas is discharged into the atmosphere through the chimney. The flue gas purification device adopts a combination of flue gas SCR denitrification + wet desulfurization + electric bag dust removal, and the dioxin emission standard is less than 0.1ngTEQ / Nm3, and the particulate matter emission standard is less than 10mg / Nm3.

2. The method for disposing oily solid waste according to claim 1, characterized in that: The middle layer water in the sedimentation tank is pumped back to the hot washing device for recycling.

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