Oily sludge energy self-sustaining treatment device and oily sludge treatment method

Abstract

The invention discloses an oily sludge energy self-sustaining treatment device which comprises a first feeder, a drying tower, a second feeder, a combustion furnace, a dust filter and a waste heat recovery device, the output end of the first feeder is connected with the drying tower, the upper end of the drying tower is connected with an exhaust pipe, the lower end of the drying tower is connected with the input end of the second feeder, and the exhaust pipe is connected with the combustion furnace. The output end of the second feeder is connected with a combustion furnace, a combustion chamber is arranged in the combustion furnace, the inner wall of the combustion chamber protrudes inwards to form a W-shaped inner wall structure, the upper end of the combustion furnace communicates with a dust filter, and the dust filter is used for screening dust with different particle sizes. According to the invention, the oily sludge can be subjected to drying, combustion decomposition and dust removal, waste heat generated by combustion can be fully utilized, combustion decomposition is sufficient in the combustion chamber, and dioxin and a precursor generated by fly ash are filtered and removed through the high-temperature dust filter, so that near-zero emission of hazardous wastes such as the dioxin and the fly ash is realized, and environmental protection and high efficiency are realized.

Description

Technical Field

[0001] The invention belongs to the field of heat treatment equipment, and in particular relates to an energy self-sustaining treatment device for oily sludge and an oily sludge treatment method. Background Art

[0002] At present, the treatment method for oily sludge is generally heat treatment, through pyrolysis or thermal desorption, to achieve harmless treatment or resource reuse of oily sludge. At present, most of the tail gas treatment technologies for heat treatment are not perfect, which is easy to cause secondary pollution. Most of the heat treatments require pretreatment, such as drying or reduction steps, and the disposal process is also relatively complicated. At present, the main technologies in Daqing area are hot washing and incineration. Incineration is mainly incineration in cracking furnaces and rotary kilns. The main problem is that hot washing cannot meet national standards. It is a technology from ten years ago. It is currently mainly used in the pre-pretreatment stage. Incineration and cracking technology is the main method in recent years. The main disadvantage is that due to the wide range of oil and water content in oily sludge, the pretreatment fluctuation is large, and the subsequent sludge incineration and cracking equipment has high requirements. The fuel is mainly natural gas, which consumes a lot of energy, has high cost, and has low operating efficiency. The tail gas treatment equipment is complicated and has poor treatment effect on harmful substances such as dioxins contained in the tail gas. Therefore, in order to avoid the shortcomings of the existing technology, it is necessary to improve the existing technology. Summary of the invention

[0003] The purpose of the present invention is to provide an energy-sustaining treatment device for oily sludge, which can dry, burn, decompose and remove dust from the oily sludge, and the waste heat generated by the combustion can be fully utilized, the combustion and decomposition in the combustion chamber are sufficient, dioxin emissions are reduced, and the environment is environmentally friendly and efficient; the present invention also provides a method for treating oily sludge.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] An energy self-sustaining treatment device for oily sludge comprises: a first feeder, a drying tower, a second feeder, a combustion furnace, a dust filter and a waste heat recovery device, wherein the output end of the first feeder is connected to the drying tower, the upper end of the drying tower is connected to an exhaust pipe, the lower end of the drying tower is connected to the input end of the second feeder, the output end of the second feeder is connected to the combustion furnace, a combustion chamber is arranged inside the combustion furnace, the inner wall of the combustion chamber protrudes inward to form a W-shaped inner wall structure, the upper end of the combustion furnace is connected to the dust filter, the dust filter is used to screen dust of different particle sizes, and the output end of the dust filter is connected to the waste heat recovery device.

[0006] As a preferred solution of the above-mentioned oily sludge energy self-sustaining treatment device, a tubular heat exchanger and a plate heat exchanger are arranged in the waste heat recovery device, and the waste heat recovery device is connected to the drying tower and transmits high-temperature exhaust gas to the drying tower.

[0007] As a preferred embodiment of the above-mentioned oily sludge energy self-sustaining treatment device, the lower end of the combustion furnace is connected to a combustion aid, the combustion aid is connected to the external environment, and oxygen is introduced into the combustion aid and the combustion furnace, and the lower end of the combustion aid is provided with a solid discharge port.

[0008] As a preferred embodiment of the above-mentioned energy self-sustaining treatment device for oily sludge, the dust filter is also connected to a circulating heat exchanger, the circulating heat exchanger is connected to the external environment, and the circulating heat exchanger is also connected to the combustion aid and the combustion furnace.

[0009] As a preferred embodiment of the above-mentioned energy self-sustaining treatment device for oily sludge, the dust filter includes a first filter chamber and a second filter chamber, the upper end of the first filter chamber and the upper end of the second filter chamber are connected to the interior of the circulation heat exchanger, and a fan is provided at the upper end of the first filter chamber, and the fan is used to draw the flue gas in the first filter chamber to the second filter chamber.

[0010] As a preferred solution of the above-mentioned oily sludge energy self-sustaining treatment device, the first filter chamber is connected to the combustion furnace, and the high-temperature gas inside the combustion furnace is continuously passed into the first filter chamber and the second filter chamber to maintain a high-temperature environment inside the first filter chamber and the second filter chamber.

[0011] As a preferred embodiment of the above-mentioned energy self-sustaining treatment device for oily sludge, the side end of the second filter chamber is connected to the waste heat recovery device, and the high-temperature gas in the second filter chamber is passed into the waste heat recovery device.

[0012] As a preferred embodiment of the above-mentioned oily sludge energy self-sustaining treatment device, the middle of the combustion chamber bulges inward to form a first bulge in the middle of the inner wall of the combustion chamber, and both ends of the combustion chamber bulge inward to form a second bulge and a third bulge at both ends of the inner wall of the combustion chamber respectively.

[0013] As a preferred embodiment of the above-mentioned energy self-sustaining treatment device for oily sludge, the second feeder is a continuous feeder.

[0014] The present invention also provides a method for treating oily sludge, wherein the oily sludge is treated by the above-mentioned energy self-sustaining treatment device for oily sludge, comprising the following steps:

[0015] Step 1, putting the oily sludge into the first feeder, the first feeder transports the oily sludge to the drying tower, and after the drying process, the second feeder transports the oily sludge to the combustion furnace;

[0016] Step 2, igniting the oily sludge in the combustion furnace, discharging the smoke generated by burning the oily sludge to the dust filter, and the dust filter discharges the filtered smoke to the waste heat recovery device, and the waste heat recovery device recovers and reuses the waste heat of the high-temperature gas.

[0017] Compared with the prior art, the energy self-sustaining treatment device for oily sludge provided by the present invention has the following beneficial effects:

[0018] The present invention can dry, burn, decompose and remove dust from oily sludge. The oily sludge is fed into a drying tower through a first feeder for drying. The upper end of the drying tower is connected to an exhaust pipe. The gas exhausted from the drying tower is discharged to an exhaust gas treatment system through the exhaust pipe for subsequent treatment. The dried oily sludge is fed to a second feeder. The second feeder feeds the dried oily sludge to a combustion furnace for combustion. A combustion chamber is arranged inside the combustion furnace. The oily sludge is burned in the combustion chamber. The inner wall of the combustion chamber bulges inward to form a W-shaped inner wall structure. The high-temperature airflow forms a multi-angle circulation in the combustion chamber. , the combustion is complete, so that the oily sludge is burned and decomposed completely, decomposing into solid oil-free mud and gaseous gas after combustion. The high-temperature airflow forms turbulent disturbance in the combustion chamber with W-shaped inner wall, and burns more fully in phase under high-temperature oxygen-rich conditions. In the W-type combustion chamber, at the initial ignition stage during use, the oxygen-rich air enters the combustion chamber after being heated. Since the internal structure of the combustion chamber adopts a W shape, it has the function of gradually shrinking and expanding, allowing the high-temperature air to change its wind speed in the room. In the wide and narrow channels, the high-temperature oxygen-rich air is quickly preheated in the combustion chamber and forms variable-speed turbulence in the process of medium dispersion, and local turbulence The flow state allows the medium to be fully mixed with the high-temperature oxygen-rich air to achieve the effect of full combustion and rapid temperature rise, and accelerates the solid-gas phase separation. The calorific value of the oil in the oily sludge is fully released, and the harmful substances are greatly reduced, which lowers the threshold for subsequent flue gas treatment. The high-temperature gas generated by the combustion furnace is transported to the dust filter, allowing the dust filter to remove dust in a high-temperature environment. The longer the dioxin stays under high temperature conditions, the fewer dioxin receptors it generates, until it is zero. High-temperature dust removal can avoid the direct generation of dioxins and other harmful substances during the cooling process, allowing the flue gas to be at 500-800 degrees Celsius. The residence time under the condition of high temperature is prolonged to reduce the formation of harmful gases. The high-temperature gas transported from the combustion furnace to the dust filter contains dust of different particle sizes. The dust filter filters and screens the dust of different particle sizes in the high-temperature gas. The filtered gas is transported to the waste heat recovery device to recover and reuse the waste heat of the high-temperature gas. It is environmentally friendly and efficient. The oily sludge energy self-sustaining treatment device releases the heat generated by the oily sludge through combustion, and uses the generated heat to circulate in the thermal treatment system to achieve a self-sustaining effect. After the oily sludge is ignited and burned, no additional fuel needs to be added, thereby achieving energy-saving effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] Figure 1 Schematic diagram of the energy self-sustaining treatment device for oily sludge of the present invention;

[0021] Figure 2 Schematic diagram of the combustion chamber of the present invention.

[0022] Markings in the figure:

[0023] 100, first feeder; 200, drying tower; 210, exhaust pipe; 300, second feeder; 400, combustion furnace; 410, combustion chamber; 411, first protrusion; 412, second protrusion; 413, third protrusion; 500, combustion aid; 510, solid discharge port; 600, circulating heat exchanger; 700, dust filter; 710, first filter chamber; 720, second filter chamber; 730, fan; 800, waste heat recovery device. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] Please also read Figure 1 to Figure 2Now, the energy self-sustaining treatment device for oily sludge provided in an embodiment of the present invention is described.

[0029] like Figure 1 to Figure 2 As shown, the energy self-sustaining treatment device for oily sludge of the present invention comprises: a first feeder 100, a drying tower 200, a second feeder 300, a combustion furnace 400, a dust filter 700 and a waste heat recovery device 800, wherein the output end of the first feeder 100 is connected to the drying tower 200, the upper end of the drying tower 200 is connected to an exhaust pipe 210, the lower end of the drying tower 200 is connected to the input end of the second feeder 300, the output end of the second feeder 300 is connected to the combustion furnace 400, a combustion chamber 410 is arranged inside the combustion furnace 400, the inner wall of the combustion chamber 410 protrudes inward to form a W-shaped inner wall structure, the upper end of the combustion furnace 400 is communicated with the dust filter 700, the dust filter 700 is used to screen dust of different particle sizes, and the output end of the dust filter 700 is communicated with the waste heat recovery device 800.

[0030] The heat generated by the oily sludge is released through combustion, and the generated heat is circulated in the thermal treatment system. After the oily sludge is ignited and burned, no additional fuel is needed, which is the energy self-sustaining effect.

[0031] The drying tower 200 dries the oily sludge to reduce the moisture content of the soil to avoid affecting the combustion effect. The combustion furnace 400 burns and decomposes the oily sludge into solid soil and gaseous flue gas. The flue gas contains small particles of dust. The dust filter 700 filters the dust contained in the generated flue gas and filters the dust of different particle sizes so that the flue gas forms a dust-free high-temperature gas after filtering and dust removal. The high-temperature exhaust gas is discharged to the exhaust gas treatment system through the waste heat recovery device 800. The heat recovery device 800 is connected to the fan and air is passed into the waste heat recovery device 800. The air exchanged heat with the high-temperature exhaust gas in the waste heat recovery device 800 and passed to the drying tower 200 after the temperature was increased. The waste heat recovery device 800 recovers and reuses the waste heat of the high-temperature gas and exchanges heat with the air passed into the waste heat recovery device 800 using the waste heat of the high-temperature exhaust gas entering the waste heat recovery device 800 from the dust filter 700. After the air is heated, the heated air is passed into the drying tower 200 for utilization.

[0032] Exemplarily, a tubular heat exchanger and a plate heat exchanger are provided in the waste heat recovery device 800. The waste heat recovery device 800 is connected to the drying tower 200 and transmits high-temperature exhaust gas to the drying tower 200. The waste heat recovery device 800 performs heat exchange filtration, and the clean high-temperature gas is transmitted to the drying tower 200. The high-temperature gas is used to dry and dehydrate the oily sludge in the drying tower 200 for recycling.

[0033] Exemplarily, the lower end of the combustion furnace 400 is connected to a combustion aid 500, and the combustion aid 500 is connected to the external environment to introduce oxygen into the combustion aid 500 and the combustion furnace 400. The lower end of the combustion aid 500 is provided with a solid discharge port 510, and the solid soil after combustion is decomposed into small particles of soil and discharged from the solid discharge port 510.

[0034] Exemplarily, the dust filter 700 is also connected to a circulating heat exchanger 600, and the circulating heat exchanger 600 is connected to the external environment. The circulating heat exchanger 600 is also connected to the combustion aid 500 and the combustion furnace 400. The high-temperature flue gas generated by the combustion furnace 400 enters the dust filter 700 and then enters the circulating heat exchanger 600. The circulating heat exchanger 600 is connected to the external environment. Air is input from the external environment through the fan 730 to exchange heat with the flue gas in the circulating heat exchanger 600. The air exchanges heat with the high-temperature flue gas in the circulating heat exchanger 600 and is heated to 500 degrees Celsius before being transported to the combustion aid 500 and the combustion furnace 400 to provide oxygen to the combustion furnace 400. The heated air is passed into the combustion furnace 400, which can reduce the heat loss generated by the heat exchange between the combustion furnace 400 and the air, and is more energy-efficient. The high-temperature air supplies oxygen and combustion during the combustion process, thereby avoiding direct emission of flue gas to pollute the environment.

[0035] Specifically, a partition net allowing gas to pass through is arranged between the combustion furnace 400 and the combustion aid 500, and corundum is laid on the partition net. Air flows upward through the corundum particles in the combustion aid 500. The rising speed of the air drives the solid corundum particles to move freely on the partition net, similar to a boiling state, forming a fluidized layer, which increases the contact area of ​​the corundum particles and is beneficial to the heat and mass transfer process. The air passes through the gaps between the corundum particles and is divided into air ducts, so that the combustion of the oily sludge in the combustion furnace 400 is more complete.

[0036] Exemplarily, the dust filter 700 includes a first filter chamber 710 and a second filter chamber 720. The upper end of the first filter chamber 710 is connected to the upper end of the second filter chamber 720 in the circulating heat exchanger 600. A fan 730 is provided at the upper end of the first filter chamber 710. The fan 730 is used to draw the smoke in the first filter chamber 710 to the second filter chamber 720. The large particles of dust have a large density, so the fan 730 draws the smoke in the first filter chamber 710 to the second filter chamber 720. In the process, large particles of dust cannot be drawn upward to the second filter chamber 720 to be filtered, and the large particles of dust are retained in the first filter chamber 710 and cannot enter the second filter chamber 720. Specifically, the first filter chamber 710 and the second filter chamber 720 are connected inside the circulating heat exchanger 600, and the high-temperature flue gas in the first filter chamber 710 exchanges heat with the air introduced into the circulating heat exchanger 600 and enters the second filter chamber 720 after the temperature is reduced. The air heated by heat exchange is passed into the combustion furnace 400 and the combustion aid 500.

[0037] Exemplarily, the first filter chamber 710 is connected to the combustion furnace 400, and the high-temperature gas inside the combustion furnace 400 is continuously introduced into the first filter chamber 710 and the second filter chamber 720 to maintain a high-temperature environment inside the first filter chamber 710 and the second filter chamber 720. The high-temperature flue gas containing dust particles generated in the combustion furnace 400 is introduced into the first filter chamber 710. Under the action of the fan 730, large particles of dust cannot be drawn upward to the second filter chamber 720 together with the flue gas, and only small particles of dust and flue gas are drawn into the second filter chamber 720, allowing the dust filter 700 to remove dust in a high-temperature environment. The longer the dioxin stays under high-temperature conditions, the fewer dioxin receptors it generates, until it is zero. High-temperature dust removal can avoid the direct generation of dioxins and other harmful substances during the cooling process, and prolong the residence time of the flue gas under 500-800 degrees Celsius conditions to reduce the formation of harmful gases.

[0038] Exemplarily, the side end of the second filter chamber 720 is connected to the waste heat recovery device 800, and the high-temperature gas in the second filter chamber 720 is passed into the waste heat recovery device 800. Small particles of dust are filtered out by the second filter chamber 720 to remove dust from the high-temperature flue gas. The filtered high-temperature gas is transported to the waste heat recovery device 800 for waste heat recovery and utilization.

[0039] Exemplarily, the middle portion of the combustion chamber 410 bulges inward to form a first protrusion 411 in the middle portion of the inner wall of the combustion chamber 410, and both ends of the combustion chamber 410 bulge inward to form a second protrusion 412 and a third protrusion 413 at both ends of the inner wall of the combustion chamber 410, respectively. The first protrusion 411, the second protrusion 412 and the third protrusion 413 form a W-shaped structure on the inner wall of the combustion chamber 410, so that the high-temperature airflow forms a multi-angle circulation in the combustion chamber 410, so that the combustion chamber 410 can burn the oily sludge more completely.

[0040] Exemplarily, the second feeder 300 is a continuous feeder, which can continuously supply raw materials to downstream equipment, so that the combustion furnace 400 can operate continuously to burn the transported oily sludge.

[0041] For example, the entire set of self-sustaining energy treatment equipment for oily sludge adopts a combination of digital remote control and AI algorithm, and operates intelligently and automatically throughout the process.

[0042] The present invention also provides a method for treating oily sludge, wherein the oily sludge is treated by the above-mentioned energy self-sustaining treatment device for oily sludge, comprising the following steps:

[0043] Step 1: Put the oily sludge into the first feeder 100, the first feeder 100 transports the oily sludge to the drying tower 200, and after the drying process, the second feeder 300 transports the oily sludge to the combustion furnace 400;

[0044] Step 2, ignite the oily sludge in the combustion furnace 400, discharge the smoke generated by burning the oily sludge to the dust filter 700, and the dust filter 700 discharges the filtered smoke to the waste heat recovery device 800, and the waste heat recovery device 800 recovers and reuses the waste heat of the high-temperature gas. The oily sludge energy self-sustaining treatment device is used to burn the oily sludge and treat the tail gas, and recover the waste heat for utilization, thereby reducing the emission of harmful gases and saving energy and protecting the environment.

[0045] Compared with the prior art, the energy self-sustaining treatment device for oily sludge provided by the present invention has the following beneficial effects:

[0046] The present invention can dry, burn, decompose and remove dust from oily sludge. The oily sludge is fed into a drying tower 200 through a first feeder 100 for drying. The upper end of the drying tower 200 is connected to an exhaust pipe 210. The gas exhausted from the drying tower 200 is discharged to an exhaust gas treatment system through the exhaust pipe 210 for subsequent treatment. The dried oily sludge is transported to a second feeder 300. The second feeder 300 transports the dried oily sludge to a combustion furnace 400 for combustion. A combustion chamber 410 is arranged inside the combustion furnace 400. The oily sludge is burned in the combustion chamber 410. The inner wall of the combustion chamber 410 bulges inward to form a W-shaped inner wall structure. The high-temperature airflow is heated in the combustion chamber 410. A multi-angle circulation is formed in the combustion chamber 410, and the combustion is complete, so that the oily sludge is burned and decomposed completely, decomposing into solid oil-free mud and gaseous gas produced after combustion. The secondary high-temperature wind is oxygen-enriched and combustion-assisted during the gas phase combustion process, avoiding direct emission of flue gas to pollute the environment. The high-temperature airflow forms turbulent disturbance in the combustion chamber 410 with a W-shaped inner wall, and the combustion is more complete in phase combustion under high-temperature oxygen-rich conditions. In the W-type combustion chamber 410, at the initial ignition stage during use, the oxygen-enriched air enters the combustion chamber 410 after being heated. Since the internal structure of the combustion chamber 410 adopts a W-shape, it has the function of gradually shrinking and expanding, allowing the high-temperature air to change its wind speed indoors, making the high-temperature air in the wide and narrow channels The oxygen-rich air is quickly preheated in the combustion chamber 410 and forms variable-speed turbulence and local turbulence in the process of medium dispersion, so that the medium is fully mixed with the high-temperature oxygen-rich air to achieve the effect of full combustion and rapid temperature rise, and accelerate the solid-gas phase separation. The calorific value of the oil in the oily sludge is fully released, and harmful substances are greatly reduced, which lowers the threshold for subsequent flue gas treatment. The high-temperature gas generated by the combustion furnace 400 is transported to the dust filter 700, so that the dust filter 700 is dusted in a high-temperature environment. The longer the dioxin stays under high-temperature conditions, the fewer dioxin receptors it generates, until it is zero. High-temperature dust removal can avoid the direct generation of dioxins and other harmful substances during the cooling process. The material prolongs the residence time of the flue gas at 500-800 degrees Celsius and reduces the formation of harmful gases. The high-temperature gas transported from the combustion furnace 400 to the dust filter 700 contains dust of different particle sizes. The dust filter 700 filters and screens the dust of different particle sizes in the high-temperature gas. The filtered gas is transported to the waste heat recovery device 800 to recover and reuse the waste heat of the high-temperature gas. It is environmentally friendly and efficient. The energy self-sustaining treatment device for oily sludge releases the heat generated by the oily sludge through combustion, and uses the generated heat to circulate in the heat treatment system to achieve a self-sustaining effect. After the oily sludge is ignited and burned, no additional fuel is needed to achieve energy-saving effects.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An energy self-sustaining treatment device for oily sludge, characterized in that: include: A first feeder, a drying tower, a second feeder, a combustion furnace, a dust filter and a waste heat recovery device; The output end of the first feeder is connected to the drying tower, the upper end of the drying tower is connected to an exhaust pipe, the lower end of the drying tower is connected to the input end of the second feeder, the output end of the second feeder is connected to the combustion furnace, a combustion chamber is arranged inside the combustion furnace, the inner wall of the combustion chamber protrudes inward to form a W-shaped inner wall structure, the upper end of the combustion furnace is connected to the dust filter, the dust filter is used to screen dust of different particle sizes, and the output end of the dust filter is connected to the waste heat recovery device.

2. The energy self-sustaining treatment device for oily sludge according to claim 1 is characterized in that: The waste heat recovery device is provided with a tubular heat exchanger and a plate heat exchanger. The waste heat recovery device is connected with the drying tower and transmits high-temperature air to the drying tower.

3. The energy self-sustaining treatment device for oily sludge according to claim 2 is characterized in that: The lower end of the combustion furnace is connected with a combustion aid, and the combustion aid is connected with the external environment to introduce oxygen into the combustion aid and the combustion furnace. The lower end of the combustion aid is provided with a solid discharge port.

4. The energy self-sustaining treatment device for oily sludge according to claim 3 is characterized in that: The dust filter is also connected to a circulating heat exchanger, which is in communication with the external environment and is also in communication with the combustion aid and the combustion furnace.

5. The energy self-sustaining treatment device for oily sludge according to claim 4 is characterized in that: The dust filter includes a first filter chamber and a second filter chamber. The upper end of the first filter chamber is connected to the upper end of the second filter chamber inside the circulation heat exchanger. A fan is provided at the upper end of the first filter chamber, and the fan is used to draw the smoke in the first filter chamber to the second filter chamber.

6. The energy self-sustaining treatment device for oily sludge according to claim 5 is characterized in that: The first filter chamber is communicated with the combustion furnace, and the high-temperature gas inside the combustion furnace is continuously introduced into the first filter chamber and the second filter chamber to maintain a high-temperature environment inside the first filter chamber and the second filter chamber.

7. The energy self-sustaining treatment device for oily sludge according to claim 6 is characterized in that: The side end of the second filter chamber is communicated with the waste heat recovery device, and the high-temperature gas in the second filter chamber flows into the waste heat recovery device.

8. The energy self-sustaining treatment device for oily sludge according to claim 1 is characterized in that: The middle of the combustion chamber bulges inwards to form a first bulge in the middle of the inner wall of the combustion chamber, and both ends of the combustion chamber bulge inwards to form a second bulge and a third bulge at both ends of the inner wall of the combustion chamber respectively.

9. The energy self-sustaining treatment device for oily sludge according to claim 1 is characterized in that: The second feeder is a continuous feeder.

10. A method for treating oily sludge, characterized in that: The oily sludge is treated by the oily sludge energy self-sustaining treatment device according to any one of claims 1 to 9, comprising the following steps: Step 1, putting the oily sludge into the first feeder, the first feeder transports the oily sludge to the drying tower, and after the drying process, the second feeder transports the oily sludge to the combustion furnace; Step 2, igniting the oily sludge in the combustion furnace, discharging the smoke generated by burning the oily sludge to the dust filter, and the dust filter discharges the filtered smoke to the waste heat recovery device, and the waste heat recovery device recovers and reuses the waste heat of the high-temperature gas.

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