Recovery equipment and flue gas recovery method

Abstract

The invention provides recovery equipment and a flue gas recovery method.The recovery equipment comprises an oil storage device, a spraying device and an oil-powder separation device, the oil storage device is used for storing oil liquid, the spraying device comprises a gas inlet pipeline and a spraying tank, and the two ends of the gas inlet pipeline communicate with flue gas generation equipment and the spraying tank correspondingly; the gas inlet pipeline is used for conveying flue gas generated by the flue gas generation equipment to the spraying tank, the top and the bottom of the spraying tank are communicated with the oil storage device, the oil-powder separation device is communicated with the bottom of the oil storage device, and the oil-powder separation device is used for carrying out solid-liquid separation on oil liquid. Smoke is adsorbed by spraying oil liquid, the adsorption effect on the smoke can be improved, a pipeline of recovery equipment cannot be adhered, the pipeline does not need to be cleaned by stopping work and production, the working environment of workers is improved, and the production capacity is improved.

Description

Technical Field

[0001] The present application relates to the technical field of waste gas recovery, and in particular to a recovery device and a flue gas recovery method. Background Art

[0002] With the rapid development and widespread application of new energy lithium battery technology, the requirements for positive and negative electrode materials in batteries are constantly increasing, which has led to continuous iteration and innovation of the heat treatment preparation process of lithium battery negative electrode materials. In the actual production process, when the positive and negative electrode materials are heat treated, tail gas containing particulate matter and various organic compounds will be volatilized. Whether the treatment method of tail gas is reasonable and perfect has gradually become a core issue facing the industry. The rationality and efficiency of the tail gas treatment plan directly determine the continuity and production capacity of production, and also affect the compliance rate and compliance of environmental protection standards.

[0003] In the related technology, water spraying and incineration are usually used for tail gas treatment. It is necessary to manually clean up the particles and condensed organic matter attached to the pipelines and finally collect them in the spray pool. The working environment is harsh and the intensity is high. Since the solid matter cannot be fully cleaned up and the water quality continues to deteriorate, the circulating water in the pool needs to be replaced regularly. The wastewater generated needs special treatment, which is expensive. In addition, during the pipeline cleaning period, the production line needs to be stopped, which restricts production capacity. Summary of the invention

[0004] The purpose of this application is to provide a recovery device and a flue gas recovery method to solve the technical problems in the related technology of using water spraying and incineration to treat exhaust gas, such as harsh manual working environment, high cost and restricted production capacity.

[0005] In a first aspect, the present application provides a recovery device for recovering flue gas generated by a flue gas generating device, the recovery device comprising:

[0006] An oil storage device, wherein the oil storage device is used to store oil;

[0007] A spray device, the spray device comprising an air intake pipe and a spray tank, the two ends of the air intake pipe are respectively connected to the smoke generating device and the spray tank, the air intake pipe is used to transport the smoke generated by the smoke generating device to the spray tank, and the top and bottom of the spray tank are connected to the oil storage device; and

[0008] An oil-powder separation device is connected to the bottom of the oil storage device and is used for separating the oil into solid and liquid.

[0009] In the recovery device provided by the present application, the oil storage device is used to store oil. The spraying device includes an intake pipe and a spraying tank. The two ends of the intake pipe are respectively connected to the flue gas generating device and the spraying tank. The intake pipe is used to convey the flue gas generated by the flue gas generating device to the spraying tank. The top of the spraying tank is connected to the oil storage device so that the oil in the oil storage device enters the spraying tank and sprays the flue gas. The bottom of the spraying tank is connected to the oil storage device so that the oil in the spraying tank is conveyed to the oil storage device for circulation. The oil and powder separation device is connected to the bottom of the oil storage device and is used to separate the solid substances in the oil. By spraying oil to adsorb the flue gas and utilizing the similar solubility characteristics between oils, the adsorption effect on particulate matter, tar, pitch fume and other organic substances in the flue gas can be improved. Moreover, the particulate matter, tar, pitch fume and other organic substances adsorbed by the oil in the flue gas will not adhere to the pipes of the recovery device and the inner walls of each tank, eliminating the need to shut down production for pipe cleaning, reducing the labor intensity of workers, improving the working environment of workers, and increasing production capacity. By setting up the oil and powder separation device, the separated solid substances (particulate matter escaping from the flue gas) can be recycled, improving the recovery efficiency and production yield of the recovery device.

[0010] Among them, the intake pipe includes an intake straight pipe and an intake inclined pipe connected to each other. The extending direction of the intake straight pipe is perpendicular to the horizontal plane. One end of the intake straight pipe away from the intake inclined pipe is connected to the flue gas generating device. One end of the intake inclined pipe away from the intake straight pipe is connected to the spraying tank. The flue gas generated by the flue gas generating device enters the spraying tank through the intake straight pipe and the intake inclined pipe in sequence.

[0011] Among them, nozzles are arranged in the intake inclined pipe and / or the spraying tank for spraying the flue gas.

[0012] Among them, the recovery device further includes a flue gas centrifugal fan, and the flue gas centrifugal fan is connected to the spraying tank.

[0013] Among them, the oil storage device includes an oil storage tank body and a stirring assembly. The stirring assembly is arranged in the oil storage tank body and is used to stir the oil in the oil storage tank body.

[0014] Among them, the oil storage device further includes a heating assembly. The heating assembly is arranged at the bottom of the oil storage tank body and is used to heat the oil in the oil storage tank body.

[0015] Among them, the recovery device further includes a gas supply device. The gas supply device includes a gas storage assembly and a gas supply assembly. The gas storage assembly is used to store the protective gas, and the gas supply assembly is used to provide the protective gas to the recovery device.

[0016] Wherein, the recovery device further includes a flue gas oxygen content analyzer and a controller, the flue gas oxygen content analyzer is electrically connected to the controller, the flue gas oxygen content analyzer is used to detect the oxygen content of the flue gas in the spray tank, and the controller controls the gas supply device according to the detection signal of the flue gas oxygen content analyzer.

[0017] Wherein, the recovery device further includes a first temperature sensor, the first temperature sensor is arranged in the intake inclined pipe, the first temperature sensor is electrically connected to the controller, the first temperature sensor is used to detect the temperature of the flue gas in the intake inclined pipe, and the controller controls the gas supply device according to the detection signal of the first temperature sensor.

[0018] Wherein, the recovery device further includes a liquid inlet heat exchange system, one end of the liquid inlet heat exchange system is communicated with the oil storage device, and the other end is communicated with the spray device, and the liquid inlet heat exchange system is used to heat exchange and cool down the oil liquid.

[0019] Wherein, the recovery device further includes a second temperature sensor, a third temperature sensor and a controller, the second temperature sensor and the third temperature sensor are both electrically connected to the controller, the second temperature sensor is arranged between the oil storage device and the liquid inlet heat exchange system, the third temperature sensor is arranged in the oil storage device, the second temperature sensor and the third temperature sensor are used to detect the temperature of the oil liquid, and the controller controls the liquid inlet heat exchange system according to the detection signal of the second temperature sensor and the detection signal of the third sensor.

[0020] In a second aspect, the present application provides a flue gas recovery method, and the flue gas is recovered by the recovery device. The flue gas recovery method includes:

[0021] Transport the flue gas generated by the flue gas generating device to the spray device;

[0022] Transport the oil liquid in the oil storage device to the spray device and spray the flue gas;

[0023] Transport the oil liquid in the oil storage device after spraying to the oil powder separation device for solid-liquid separation.

[0024] In the flue gas recovery method provided by this application, the flue gas generated by the flue gas generating device is transported to the spray tank, the oil liquid in the oil storage device is transported to the spray tank and sprayed, the oil liquid in the spray tank is transported to the oil storage device, and the oil liquid in the oil storage device is transported to the oil powder separation device for solid matter separation. By spraying the oil liquid to adsorb the flue gas, and utilizing the similar solubility characteristics between oils, the adsorption effect on particulate matter, tar, pitch fume and other organic matters in the flue gas can be improved. Moreover, the particulate matter, tar, pitch fume and other organic matters adsorbed by the oil liquid in the flue gas will not adhere to the pipelines of the recovery equipment and the inner walls of each tank body, eliminating the need to shut down production for pipeline cleaning, reducing the labor intensity of workers, improving the working environment of workers, and increasing production capacity. By setting up the oil powder separation device, the oil liquid can be recycled, the cost of recovering flue gas can be reduced, and the separated solid matter (particulate matter escaping from the flue gas) can be recycled through the oil powder separation device, improving the recovery efficiency and production yield of the recovery equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of this application, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of this application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of a recovery device provided by an embodiment of this application;

[0027] Figure 2 It is a schematic structural diagram of the oil liquid transmission part in a recovery device provided by an embodiment of this application;

[0028] Figure 3 It is a schematic structural diagram of the flue gas flow part in a recovery device provided by an embodiment of this application;

[0029] Figure 4 It is a schematic structural diagram of the protective gas flow part in a recovery device provided by an embodiment of this application;

[0030] Figure 5 It is a schematic structural diagram of a spray tank provided by an embodiment of this application;

[0031] Figure 6 It is a schematic structural diagram of a first oil storage tank body provided by an embodiment of this application;

[0032] Figure 7 It is a schematic structural diagram of a liquid inlet heat exchange system provided by an embodiment of this application;

[0033] Figure 8It is a schematic structural diagram of an oil-powder separation device provided by an embodiment of the present application;

[0034] Figure 9 It is a flowchart of a flue gas recovery method provided by an embodiment of the present application.

[0035] Label description:

[0036] Recovery equipment 100, flue gas generation equipment 200, oil storage device 10, first oil storage tank body 11, second oil liquid inlet 111, second oil liquid outlet 112, third oil liquid inlet 113, third oil liquid outlet 114, stirring assembly 115, heating assembly 116, pressure transmitter 117, oil storage tank blasting port 118, high liquid level gauge 119, low liquid level gauge 1110, second oil storage tank body 12, first stirring liquid outlet valve 131, second stirring liquid outlet valve 132, third stirring liquid outlet valve 133, fourth stirring liquid outlet valve 134, first conveying valve 135, second conveying valve 136, first stirring liquid inlet valve 137, second stirring liquid inlet valve 138, spraying device 20, intake pipeline 21, intake straight pipe 211, intake inclined pipe 212, flue gas observation port 213, first transmission assembly 22, first spraying pipeline 221, first oil inlet valve 222, spraying tank 23, first oil liquid inlet 231, cleaning port 232, top cover 233, first oil liquid outlet 234, flue gas inlet 235, flue gas outlet 236, second transmission assembly 24, second spraying pipeline 241, second oil inlet valve 242, oil-powder separation device 30, main drive motor 31, auxiliary drive motor 32, separation drum 33, separation device liquid inlet 34, separation device liquid outlet 35, separation device slag outlet 36, slag cleaning structure 37, separation oil pump 41, oil loading valve 42, oil loading oil pump 43, oil loading interface 44, main oil pump 45, standby oil pump 46, oil unloading valve 47, oil unloading interface 48, separation liquid outlet valve 49, flue gas centrifugal fan 51, flue gas ventilation butterfly valve 52, first stirring gas valve 53, second stirring gas valve 54, flue gas oxygen content analyzer 55, flue gas analysis ball valve 56, liquid inlet flowmeter 57, oil inlet check valve 58, gas supply device 60, first gas supply pipeline 61, second gas supply pipeline 62, third gas supply pipeline 63, first valve assembly 64, second valve assembly 65, third valve assembly 66, first temperature sensor 71, second temperature sensor 72, third temperature sensor 73, oil liquid sampling port 74, oil liquid sampling ball valve 75, oil inlet pressure gauge 76, liquid inlet heat exchange system 80, oil inlet 81, oil outlet 82, refrigerant liquid inlet 83, refrigerant liquid outlet 84. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts belong to the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0039] In this specification, for convenience, terms indicating orientation or positional relationships such as "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are used to describe the positional relationships of the constituent elements with reference to the accompanying drawings. This is only for the convenience of describing this specification and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. The positional relationships of the constituent elements are appropriately changed according to the directions of the described constituent elements. Therefore, it is not limited to the terms described in the specification and can be appropriately replaced according to the situation.

[0040] In this specification, unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate member, or the communication inside two elements. For those of ordinary skill in the art, the meanings of the above terms in the present disclosure can be understood according to the situation.

[0041] With the rapid development and wide application of new energy lithium battery technology, the requirements for materials such as the positive and negative electrodes in the battery are also constantly increasing, which makes the heat treatment preparation process of lithium battery negative electrode materials constantly iterate and innovate. In the actual production process, when heat-treating materials such as the positive and negative electrodes, tail gases containing particulate matter, various organic compounds, etc. will be volatilized. Whether the treatment method for the tail gases is reasonable and perfect has gradually become the core problem faced by the industry. The rationality and efficiency of the tail gas treatment plan directly determine the continuity of production and production capacity, and also affect the compliance rate and compliance of environmental protection.

[0042] In the past few years, electrostatic dust removal has been widely used in the tail gas treatment of the heat treatment process of negative electrode materials, such as granulation and pre-carbonization. In recent years, a treatment method combining spraying and incineration has been explored to meet environmental protection requirements. In the industrial production process, conventional tail gas treatment methods generally include three methods: electrostatic dust removal, dry dust removal combining cyclone and bag, and wet dust removal combining spraying and incineration. Among them, in the actual production process, electrostatic dust removal is gradually eliminated by the industry due to the small gas treatment volume, easy explosion when oxygen enters, large volume of main equipment, large space occupation, and special treatment of by-products. The dry dust removal combining cyclone and bag has insufficient efficiency in capturing ultrafine dust, which can easily lead to bag blockage, frequent cleaning and shortened filter bag life. It is also easy to condense and stick the bag due to high temperature and high humidity. The system resistance is large, the maintenance cost is high, and the adaptability to working conditions is poor. The use of water spraying and incineration has a large gas treatment capacity and a relatively high safety factor. Through the centralized treatment of flue gas, nozzles are arranged at special positions in the spray tower, which can adsorb particulate matter to a certain extent to make it settle, and condense and deposit organic matter at the same time. However, it is still necessary to manually clean up the particulate matter and condense the organic matter that is finally enriched in the spray pool and salvage the particulate matter and condensed organic matter attached to various parts of the pipeline on a regular basis. The working environment is harsh and the intensity is high. Since the solid matter cannot be fully cleaned up and the water quality continues to deteriorate, the circulating water in the pool needs to be replaced regularly. The wastewater generated needs special treatment, which is expensive. During the pipeline cleaning period, the production line needs to be shut down, which restricts production capacity.

[0043] The purpose of the present application is to provide a recovery device 100 and a flue gas recovery method to solve the technical problems in the related art of using water spraying and incineration to treat exhaust gas, such as harsh manual working environment, high cost and restricted production capacity.

[0044] Please refer to Figures 1 to 5 , Figure 1 is a structural schematic diagram of a recycling device provided in an embodiment of the present application, Figure 2 is a schematic diagram of the structure of the oil transmission part of a recovery device provided in an embodiment of the present application, Figure 3 is a schematic diagram of the structure of the smoke circulation part of a recovery device provided in an embodiment of the present application, Figure 4 is a schematic structural diagram of a protective gas circulation part in a recovery device provided in an embodiment of the present application, Figure 5 It is a schematic diagram of the structure of a spray tank provided in an embodiment of the present application.

[0045] The present application provides a recovery device 100, which is used to recover the flue gas generated by a flue gas generating device 200. Among them, in this embodiment, the flue gas generating device 200 is a heat treatment device for lithium-ion battery anode materials. For example, the flue gas generating device 200 can be a vertical kettle, a horizontal kettle, a rotary drum furnace, a rotary kiln, a tunnel kiln, a roller hearth kiln and other devices. Optionally, the flue gas generating device 200 can also be other devices that generate flue gas during operation. In other words, the recovery device 100 of the present application can be applied not only to the field of lithium-ion battery manufacturing processes, but also to other manufacturing process fields, and the present application does not limit this.

[0046] In the embodiment of the present application, the recovery device 100 includes an oil storage device 10, a spraying device 20 and an oil-powder separation device 30. The oil storage device 10 is used to store oil liquid. The spraying device 20 includes an intake pipe 21 and a spraying tank 23. The two ends of the intake pipe 21 are respectively connected to the flue gas generating device 200 and the spraying tank 23. The intake pipe 21 is used to transport the flue gas generated by the flue gas generating device 200 to the spraying tank 23. The top and bottom of the spraying tank 23 are connected to the oil storage device 10. The oil-powder separation device 30 is connected to the bottom of the oil storage device 10, and the oil-powder separation device 30 is used to perform solid-liquid separation on the oil liquid.

[0047] The spraying device 20 includes an intake pipe 21 and a spraying tank 23. Among them, the two ends of the intake pipe 21 are respectively connected to the flue gas generating device 200 and the spraying tank 23. The flue gas generated by the flue gas generating device 200 enters the spraying tank 23 through the intake pipe 21. Specifically, the spraying tank 23 includes a flue gas inlet 235, and the flue gas inlet 235 is located on the side wall of the tank body of the spraying tank 23. The flue gas inlet 235 is connected to the intake pipe 21 and is used to allow the flue gas in the intake pipe 21 to enter the spraying pipe. Optionally, in this embodiment, the intake pipe 21 and the flue gas inlet 235 of the spraying tank 23 are connected by a flange.

[0048] Among them, the spraying device further includes a first transmission component 22. The first transmission component 22 is connected to the spraying tank 23 and the oil storage device 10. The first transmission component 22 is used to spray the oil liquid into the spraying tank 23, and the oil liquid adsorbs the flue gas in the spraying tank 23, so as to facilitate subsequent recovery operations such as separating the particulate matter in the flue gas.

[0049] Specifically, the first transmission component 22 includes at least one first spray pipe 221 and at least one first oil inlet valve 222. The number of the first spray pipes 221 corresponds to that of the first oil inlet valves 222, and one first oil inlet valve 222 is provided on one first spray pipe 221. The first oil inlet valve 222 can control the on-off of the oil in the first spray pipe 221. Optionally, the first oil inlet valve 222 can be a manual valve or an electrically controlled valve. Further optionally, the first oil inlet valve 222 includes, but is not limited to, valves such as ball valves, gate valves, and globe valves. It should be noted that all valves in the subsequent statements of this application can be changed in terms of valve types according to actual needs, such as ball valves, gate valves, globe valves, etc., and changes in valve driving methods, such as manual, pneumatic, electric, etc., will not be elaborated hereinafter.

[0050] Further, at least one first oil inlet 231 is provided at the top of the spray tank 23, and the first spray pipe 221 communicates with the first oil inlet 231. Further, the first transmission component 22 further includes a first nozzle communicating with the first spray pipe 221. One first nozzle is provided corresponding to one first spray pipe 221, and the number of the first nozzles corresponds to that of the first spray pipes 221. The first nozzle is disposed in the spray tank 23, and the first nozzle is disposed at the top of the spray tank 23 and corresponds to the first oil inlet 231. The oil in the first spray pipe 221 is sprayed into the spray tank 23 through the first nozzle. The first nozzle sprays the oil, and the first nozzle can make the oil evenly distributed in the spray tank 23. In the spray tank 23, the uniform distribution of the oil can ensure that the flue gas in each area can fully contact with the oil. Moreover, since the first nozzle disperses the oil into fine droplets and evenly sprays them in the spray tank 23, the oil can mix and contact more fully with the solid substances in the flue gas. In this process, the adsorption effect of the oil on the solid substances in the flue gas is enhanced. For example, for the particulate matter in the flue gas, the fine oil droplets are more likely to wrap and adsorb them; for some gaseous organic substances, the oil droplets can also adsorb them through surface tension and intermolecular forces. This enhanced adsorption effect helps to improve the purification ability of the recovery device 100 for the flue gas and make the discharged flue gas cleaner. Optionally, the solid substances include, but are not limited to, particulate matters such as dust in the flue gas.

[0051] Optionally, in this embodiment, the number of the first spray pipes 221, the first oil inlet valves 222, the first oil inlets 231, and the first nozzles is equal, and the number of the first spray pipes 221, the first oil inlet valves 222, the first oil inlets 231, and the first nozzles is 4. In other embodiments, the number of the first spray pipes 221, the first oil inlet valves 222, the first oil inlets 231, and the first nozzles can also be 1, or 2, or 3, or 5, or 6, or other numbers, and this application does not limit this.

[0052] Further, in the present embodiment, the number of the first spray pipes 221, the first oil inlet valves 222, the first oil inlets 231, and the first nozzles is four, and the four first nozzles are arranged around the periphery of the top of the spray tank 23, which can enable the oil liquid to be sprayed onto each corner of the spray tank 23 in a relatively uniform manner, allowing the flue gas to be fully mixed with the oil liquid throughout the spray tank 23, and improving the removal effect of solid substances in the flue gas.

[0053] Further, the spray tank 23 includes a cleaning port 232 and a top cover 233. The cleaning port 232 is provided on the side wall of the tank body of the spray tank 23. After the recycling device 100 is used for a period of time, the user can open the cleaning port 232 to check or clean the attachments condensed inside the spray tank 23, and can also adjust the spraying angle and size of the first nozzles through the cleaning port 232, so that the entire spray tank 23 can be covered when the multiple first nozzles spray. The top cover 233 is provided on the top of the spray tank 23. The top cover 233 can be opened to clean the top of the spray tank 23, and the top cover 233 can also be opened to view the spraying effect of the first nozzles.

[0054] The spraying device 20 adsorbs the flue gas by spraying the oil liquid. By utilizing the similar solubility characteristics between oils, the adsorption effect on particulate matters, tar, pitch fumes and other organic matters in the flue gas can be improved. Moreover, the particulate matters, tar, pitch fumes and other organic matters adsorbed by the oil liquid in the flue gas will not adhere to the pipelines of the recycling device 100 and the inner walls of each tank body, eliminating the need to shut down and clean the pipelines, reducing the labor intensity of workers, improving the working environment of workers, and increasing the production capacity.

[0055] The bottom of the spray tank 23 is communicated with the oil storage device 10. Specifically, a first oil outlet 234 is provided at the bottom of the spray tank 23, and the first oil outlet 234 is communicated with the oil storage device 10 through a pipeline. The oil liquid in the spray tank 23 enters the oil storage device 10 through the first oil outlet 234. It should be noted that the oil liquid in the spray tank 23 at this time is the oil liquid after adsorbing the flue gas. Further, the spraying device 20 further includes a spray liquid outlet valve, which is respectively connected to the first oil outlet 234 of the spray tank 23 and the oil storage device 10. The spray liquid outlet valve controls whether the oil liquid enters the oil storage device 10 from the spray tank 23 through the open and closed states, realizing the start-stop control of the oil liquid transportation process.

[0056] The oil-powder separation device 30 is communicated with the bottom of the oil storage device 10. The oil-powder separation device 30 is used for separating the solid and liquid of the oil liquid. In other words, the oil-powder separation device 30 is used for separating and recycling the solid substances in the oil liquid (the oil liquid after adsorbing the flue gas) in the oil storage device 10. Through the oil-powder separation device 30, the separated solid substances (the particulate matters escaping from the flue gas) can be recycled, which can improve the recycling efficiency and production yield of the recycling device 100.

[0057] In one embodiment, the oil-powder separation device 30 can be respectively connected to the bottom and the top of the oil storage device 10. The oil-powder separation device 30 is used for separating solid substances from the oil liquid (the oil liquid after adsorbing flue gas) in the oil storage device 10, and re-transporting the pure oil liquid after solid substance separation into the oil storage device 10, so that the oil liquid transported by the oil storage device 10 to the first spray pipe 221 is pure oil liquid and has a strong adsorption effect on flue gas. By arranging the oil-powder separation device 30 to be respectively connected to the bottom and the top of the oil storage device 10, the oil liquid can be recycled, and the cost of recovering flue gas can be reduced.

[0058] Further, the recovery device 100 further includes a separation oil pump 41. The separation oil pump 41 is arranged between the oil storage device 10 and the oil-powder separation device 30. The separation oil pump 41 provides mechanical power for oil liquid transportation and is used for transporting the oil liquid in the oil storage device 10 into the oil-powder separation device 30. Further, in this embodiment, the recovery device 100 further includes a separation oil pump 41 inlet valve and a separation oil pump 41 outlet valve. The separation oil pump 41 inlet valve and the separation oil pump 41 outlet valve are respectively connected to two ends of the separation oil pump 41. Further, in this embodiment, the recovery device 100 further includes a separation outlet valve 49. The separation outlet valve 49 is respectively connected to the oil-powder separation device 30 and the oil storage device 10. The separation outlet valve 49 controls whether the oil liquid enters the oil storage device 10 from the oil-powder separation device 30 through the open and closed states, so as to realize the start-stop control of the oil liquid transportation process.

[0059] In the recovery device 100 provided by this application, the oil storage device 10 is used to store oil. The spraying device 20 includes an intake pipeline 21 and a spraying tank 23. Both ends of the intake pipeline 21 are respectively connected to the flue gas generating device 200 and the spraying tank 23. The intake pipeline 21 is used to transport the flue gas produced by the flue gas generating device 200 to the spraying tank 23. The top of the spraying tank 23 is connected to the oil storage device 10, so that the oil in the oil storage device 10 enters the spraying tank 23 and sprays the flue gas. The bottom of the spraying tank 23 is connected to the oil storage device 10, so that the oil in the spraying tank 23 is transported to the oil storage device 10 for circulation. The oil and powder separation device 30 is connected to the bottom of the oil storage device 10, and the oil and powder separation device 30 is used to separate the solid substances in the oil. By spraying oil to adsorb the flue gas, and using the similar solubility characteristics between oils, the adsorption effect on particulate matter, tar, pitch fumes and other organic substances in the flue gas can be improved. Moreover, the particulate matter, tar, pitch fumes and other organic substances adsorbed by the oil in the flue gas will not adhere to the pipelines of the recovery device 100 and the inner walls of each tank body. There is no need to stop production to clean the pipelines, which reduces the labor intensity of workers, improves the working environment of workers, and increases production capacity. By setting the oil and powder separation device 30, the separated solid substances (particulate matter escaping from the flue gas) can be recycled, which can improve the recovery efficiency and production yield of the recovery device 100.

[0060] It should be noted that, in this embodiment, the oil storage device 10 is used to store oil, and the oil in the oil storage device 10 can be used for the spraying device 20 to spray multiple times. Until the solid substance content in the oil in the oil storage device 10 is too high, the waste oil in the oil storage device 10 is recovered by an oil unloading truck. The waste oil can also be used for subsequent processes such as preparing recycled asphalt, completing the entire recovery and utilization of the flue gas. When the recovery device 100 recovers the flue gas, no hazardous waste is generated, and no additional hazardous waste treatment cost is required. The waste oil is also turned into a useful resource, realizing a closed-loop of flue gas treatment.

[0061] Moreover, after the waste oil in the oil storage device 10 is recovered by an oil unloading truck, pure oil (without solid substances such as flue gas) can be transported into the oil storage device 10 by an oil loading truck for subsequent flue gas recovery. Further, the recovery device 100 further includes an oil loading valve 42, an oil loading oil pump 43, and an oil loading interface 44. The oil loading valve 42, the oil loading oil pump 43, and the oil loading interface 44 are sequentially arranged between the oil storage device 10 and the oil loading truck. The oil loading interface 44 is used to connect the oil loading truck. The oil loading oil pump 43 provides mechanical power for oil transportation, and is used to transport the oil in the oil loading truck into the oil storage device 10. The oil loading valve 42 controls whether the oil enters the oil storage device 10 from the oil loading truck through the open and closed states, realizing the start and stop control of the oil transportation process.

[0062] Please refer to Figures 1 to 5, in one embodiment, the recycling device 100 further includes an oil pump assembly. The oil pump assembly is respectively connected to the oil storage device 10 and the spraying device 20. The oil pump assembly provides mechanical power for oil transportation, and is used to transport the oil in the oil storage device 10 to the first transmission assembly 22 and the second transmission assembly 24 of the spraying device 20 for spraying.

[0063] Further, in this embodiment, the oil pump assembly includes a main oil pump 45 and a standby oil pump 46. The main oil pump 45 and the standby oil pump 46 are in a one - use - one - standby mode, with variable - frequency speed regulation and do not work simultaneously. However, when one of the main oil pump 45 and the standby oil pump 46 fails, the other one can be switched to work to ensure the smooth progress of production.

[0064] Further, in one embodiment, the oil pump assembly further includes a main oil pump inlet valve and a main oil pump outlet valve. The main oil pump inlet valve and the main oil pump outlet valve are respectively connected to both ends of the main oil pump 45 through pipelines, reducers and flexible connections. The oil pump assembly also includes a standby oil pump inlet valve and a standby oil pump outlet valve. The standby oil pump inlet valve and the standby oil pump outlet valve are respectively connected to both ends of the standby oil pump 46 through pipelines, reducers and flexible connections.

[0065] It should be noted that the oil pump assembly is also connected to the oil unloading truck at the same time. The oil pump assembly can be used to transport the oil in the oil storage device 10 into the oil unloading truck for recycling. Specifically, the recycling assembly further includes an oil unloading valve 47 and an oil unloading interface 48. The oil unloading interface 48 is used to connect to the oil unloading truck. The oil unloading valve 47 is arranged between the oil pump assembly and the oil unloading interface 48. When the oil in the oil storage device 10 needs to be replaced, the oil unloading valve 47 can be opened, and the oil in the oil storage device 10 is pumped out through the oil pump assembly and transported to the oil unloading truck through the oil unloading interface 48 for subsequent preparation of recycled asphalt process.

[0066] Further, the recycling device 100 further includes a spray oil unloading port ball valve. The spray oil unloading port ball valve communicates with the spraying device 20. When the recycling device 100 needs to replace pipeline fittings, after the recycling device 100 stops running, the spray oil unloading port ball valve can be opened to fully discharge the remaining oil in the pipeline of the spraying device 20.

[0067] Please refer to Figures 1 to 5 , in one embodiment, the intake pipeline 21 includes an intake straight pipe 211 and an intake inclined pipe 212 connected to each other. The extending direction of the intake straight pipe 211 is perpendicular to the horizontal plane. One end of the intake straight pipe 211 away from the intake inclined pipe 212 communicates with the flue gas generating device 200, and one end of the intake inclined pipe 212 away from the intake straight pipe 211 communicates with the spray tank 23. The flue gas generated by the flue gas generating device 200 enters the spray tank 23 through the intake straight pipe 211 and the intake inclined pipe 212 in sequence.

[0068] Among them, the extension direction of the intake straight pipe 211 is perpendicular to the horizontal plane, and the gravity can be used to naturally settle the heavy-component particulate matters in the tail gas. For example, the heavy-component particulate matters with a larger density in the flue gas (such as metal oxides, dust, high-boiling organic matter particles, etc.) will settle at a speed greater than the upward speed of the air flow due to their own gravity when passing through the vertical straight pipe with the air flow, and thus gradually deposit at the bottom of the intake straight pipe 211. The intake straight pipe 211 uses the gravity sedimentation principle to remove about part of the heavy-component particulate matters in advance, reduce the treatment load of the subsequent spray tank 23 and the oil-powder separation device 30, avoid the blockage of the pipeline by large particles or the acceleration of oil pollution, and moreover, the heavy-component particulate matters settled by the intake straight pipe 211 can be regularly recovered through the slag discharge port at the bottom of the intake straight pipe 211 to realize resource reuse and improve the production yield.

[0069] The intake inclined pipe 212 is inclined relative to the horizontal plane, which can ensure that the particulate matters and organic matters agglomerated and caked in the flue gas can slide down along the intake inclined pipe 212 to the spray tank 23 after combination, and avoid the blockage of the pipeline caused by part of the particulate matters staying in the intake inclined pipe 212.

[0070] Among them, optionally, the inclination angle range of the intake inclined pipe 212 relative to the horizontal plane is 10° - 80°. For example, the inclination angle of the intake inclined pipe 212 relative to the horizontal plane can be 10°, or 20°, or 30°, or 40°, or 50°, or 60°, or 70°, or 80°, or other degrees within 10° - 80°. This application does not make any restrictions on this.

[0071] Furthermore, a flue gas observation port 213 is provided at one end of the intake straight pipe 211 close to the intake inclined pipe 212. The flue gas observation port 213 can be used to observe the blockage condition of the intake straight pipe 211 so that the user can clean the intake straight pipe 211 in time.

[0072] Please refer to Figures 1 to 5 , furthermore, in an implementation manner, the spray device 20 further includes a second transmission component 24. One end of the second transmission component 24 is communicated with the intake inclined pipe 212, and the other end is communicated with the oil storage device 10. The second transmission component 24 is used to transport the oil liquid in the oil storage device 10 to the intake inclined pipe 212 for spraying.

[0073] The second transmission component 24 communicates with the intake inclined pipe 212 and the oil storage device 10. The second transmission component 24 is used to spray the oil liquid into the intake inclined pipe 212, and the oil liquid adsorbs the flue gas in the intake inclined pipe 212 to facilitate subsequent separation and other recovery operations of the particulate matters in the flue gas.

[0074] The second transfer component 24 sprays the flue gas in the intake inclined pipe 212, and the first transfer component 22 sprays the flue gas in the spray tank 23. In other words, the flue gas generated by the flue gas generating device 200 first passes through the intake inclined pipe 212 and is sprayed by the oil liquid in the second transfer component 24. Then, the remaining part of the flue gas enters from the bottom up through the flue gas inlet 235 of the spray tank 23 and is sprayed by the oil liquid in the first transfer component 22. The flue gas is cooled and adsorbed twice, and most of the particulate matter and organic matter in the flue gas can be fully adsorbed, improving the adsorption efficiency of the spray device 20 for the flue gas.

[0075] Specifically, the second transfer component 24 includes a second spray pipe 241 and a second oil inlet valve 242. The second oil inlet valve 242 can control the on-off of the oil liquid in the second spray pipe 241. Further, the second transfer component 24 further includes a second nozzle. The second nozzle sprays the oil liquid, and the second nozzle can make the oil liquid evenly distributed in the intake inclined pipe 212. Moreover, since the second nozzle disperses the oil liquid into fine droplets and evenly sprays them in the intake inclined pipe 212, the oil liquid can be more fully mixed and contacted with the solid substances in the flue gas.

[0076] Meanwhile, it should be noted that the intake inclined pipe 212 is inclined relative to the horizontal plane, which can also ensure that the oil liquid sprayed by the second transfer component 24 can naturally flow along the intake inclined pipe 212 into the spray tank 23 and will not fall into the flue gas generating device 200.

[0077] It should be noted that in this application, nozzles are provided in the intake inclined pipe 212 and / or the spray tank 23, and the nozzles are used to spray the flue gas. Among them, the nozzles include a first nozzle provided in the spray tank 23 and a second nozzle provided in the intake inclined pipe 212. In other words, the recovery device 100 of this application can be provided with both the first nozzle and the second nozzle, or one of the first nozzle and the second nozzle. This application does not limit this.

[0078] Please refer to Figures 1 to 5 , in an embodiment, the recovery device 100 further includes a flue gas centrifugal fan 51, and the flue gas centrifugal fan 51 is connected to the spray tank 23.

[0079] Specifically, the spray tank 23 further includes a flue gas outlet 236, and the recovery device 100 further includes a flue gas ventilation butterfly valve 52. The flue gas outlet 236 is connected to the flue gas ventilation butterfly valve 52 through a flange, a pipe, and a three-way connection for the bursting disc access of the spray tank 23 is provided at the confluence of the pipes, and a bursting disc can be connected in parallel to meet the pressure relief requirements of the pipeline under extreme working conditions. The flue gas ventilation butterfly valve 52 can manually adjust the opening degree according to needs to ensure that the flue gas coming from the spray tank 23 has sufficient traction.

[0080] The flue gas that is not fully adsorbed in the spray tank 23 will be discharged from the flue gas outlet 236, pass through the flue gas ventilation butterfly valve 52, and then pass through the flue gas centrifugal fan 51. The rear end of the flue gas centrifugal fan 51 can be connected to devices such as an incinerator or an activated carbon adsorption box, so as to remove the residual pollutants and odors in the flue gas by means of activated carbon adsorption or incineration in the incinerator, and discharge the flue gas after meeting the environmental protection emission requirements.

[0081] Among them, the frequency conversion of the flue gas centrifugal fan 51 is adjustable, and it can keep the wind pressure in the pipeline fluctuating within a reasonable range, so that the generation amount and treatment amount of the flue gas are basically matched.

[0082] In one embodiment, the oil storage device 10 includes an oil storage tank body and a stirring assembly 115. The stirring assembly 115 is arranged in the oil storage tank body and is used for stirring the oil liquid in the oil storage tank body. It should be noted that the number of the oil storage tank body and the stirring assembly 115 can be multiple.

[0083] Please refer to Figures 1 to 6 , Figure 6 which is a schematic structural diagram of a first oil storage tank body provided by an embodiment of the present application.

[0084] In one embodiment, the multiple oil storage tank bodies include a first oil storage tank body 11, and the first oil storage tank body 11 is connected to the bottom of the spray tank 23.

[0085] It should be noted that the first oil storage tank body 11 is used for storing oil liquid, and all the spray oil liquid required by the spray device 20 is obtained from the first oil storage tank body 11. The volume and capacity of the first oil storage tank body 11 are much larger than those of the spray tank 23. Optionally, in this embodiment, the ratio range of the capacity of the first oil storage tank body 11 to the capacity of the spray tank 23 is 2-40. For example, the ratio of the capacity of the first oil storage tank body 11 to the capacity of the spray tank 23 can be 2, or 5, or 8, or 10, or 12, or 15, or 17, or 20, or 21, or 25, or 26, or 30, or 33, or 35, or 39, or 40, or other ratios within 2-40. The present application does not limit this.

[0086] It should be further noted that, optionally, in this embodiment, the number of the spray tanks 23 can be multiple, and one first oil storage tank body 11 correspondingly provides multiple spray tanks 23 for oil liquid spraying. For example, the ratio of the number of the first oil storage tank body 11 to the number of the spray tanks 23 can be 1:2, or 1:5, or 1:7, or 1:9, or 1:10, or 1:15, or 1:20, or other ratios. The present application does not limit this.

[0087] Further, the first oil storage tank body 11 includes a second oil inlet 111 and a second oil outlet 112. Among them, the second oil inlet 111 is arranged at the top of the first oil storage tank body 11, and the second oil inlet 111 is connected to the spray tank 23 through a pipeline. The oil after spraying in the spray tank 23 enters the first oil storage tank body 11 through the second oil inlet 111. The second oil outlet 112 is arranged on the side wall of the first oil storage tank body 11, and the second oil outlet 112 is connected to the first transmission assembly 22 and the second transmission assembly 24 through pipelines. The oil in the first oil storage tank body 11 is transported to the first transmission assembly 22 and the second transmission assembly 24 through the second oil outlet 112 for spraying into the spray tank 23 and adsorbing the flue gas.

[0088] Further, the first oil storage tank body 11 further includes a third oil inlet 113 and a third oil outlet 114. Among them, the third oil inlet 113 is arranged at the top of the first oil storage tank body 11, and the third oil inlet 113 is connected to the oil powder separation device 30 through a pipeline. The oil after the solid substances are separated by the oil powder separation device 30 is transported into the first oil storage tank body 11 through the third oil inlet 113. And, the third oil inlet 113 can also be connected to an oil loading truck through a pipeline, and the oil loading truck adds oil to the first oil storage tank body 11 through the third oil inlet 113.

[0089] The third oil outlet 114 is arranged at the bottom of the first oil storage tank body 11, and the third oil outlet 114 is connected to the oil powder separation device 30 through a pipeline. The oil in the first oil storage tank body 11 is transported into the oil powder separation device 30 through the third oil outlet 114 for solid substance separation.

[0090] Please refer to Figures 1 to 6 , in an embodiment, the stirring assembly 115 is arranged in the first oil storage tank body 11 and is used for stirring the oil in the first oil storage tank body 11. Through mechanical stirring by the stirring assembly 115, the oil in the first oil storage tank body 11 is kept in a uniformly mixed state, avoiding stratification, precipitation or local concentration differences. And, stirring can keep the physical properties (such as viscosity, surface tension) of the oil consistent, ensuring that the adsorption capacity of each drop of oil is balanced when the spraying device 20 sprays.

[0091] Further, the oil transported from the spray tank 23 carries solid substances such as particulate matter and condensed organic matter. Stirring by the stirring assembly 115 can prevent the solid substances from depositing at the bottom of the first oil storage tank body 11, making them evenly distributed in the oil, facilitating subsequent transportation of the oil to the oil powder separation device 30 for efficient treatment, avoiding local blockage of the oil powder separation device 30. And, when the oil in the first oil storage tank body 11 needs to be replaced, the stirring assembly 115 can also stir, facilitating the effective transportation of the oil in the first oil storage tank body 11 into the oil unloading truck and avoiding problems such as pipeline blockage.

[0092] It should be noted that in this embodiment, the stirring assembly 115 can stir during the replacement of the oil liquid in the first oil storage tank 11 and before the separation of oil and powder. In other embodiments, the stirring assembly 115 can also work at other times, and the present application does not limit this.

[0093] Furthermore, the oil storage device 10 further includes a heating assembly 116, which is arranged at the bottom of the first oil storage tank 11 and is used to heat the oil liquid in the first oil storage tank 11.

[0094] It can be understood that the viscosity of the oil liquid will increase significantly and become more viscous in a low-temperature environment. By heating the oil liquid through the heating assembly 116, the thermal motion ability of the oil liquid molecules can be improved, and the intermolecular interaction force can be weakened, thereby reducing the viscosity of the oil liquid. When the viscosity of the oil liquid decreases, the flow resistance in each pipeline of the recovery device 100 will decrease, enabling the oil liquid to flow more smoothly in the oil storage device 10, the spraying device 20, and the entire recovery device 100. This is beneficial to improving the conveying efficiency of the oil liquid, reducing power consumption, and at the same time reducing the risk of pipeline blockage and equipment failure caused by poor fluidity of the oil liquid.

[0095] Moreover, in some low-temperature environments or when dealing with special oil liquids, the oil liquid may solidify or crystallize. Once the oil liquid solidifies or crystallizes, it will not only affect the flow of the oil liquid in the recovery device 100 but may also damage the recovery device 100. The heating assembly 116 can keep the temperature of the oil liquid above its solidification point or crystallization temperature to ensure that the oil liquid is always in a liquid state and maintain the normal operation of the recovery device 100.

[0096] It can be understood that in the spraying tank 23, the oil liquid comes into full contact with the flue gas and adsorbs the solid substances therein. After the oil liquid is heated by the heating assembly 116, the activity of the oil liquid molecules is enhanced, and the collision frequency and reaction probability between the oil liquid molecules and the solid substance molecules in the flue gas will increase. This improves the adsorption ability of the oil liquid for solid substances such as particulate matter and organic matter in the flue gas, enabling the pollutants in the flue gas to be removed more efficiently and improving the purification efficiency of the recovery device 100 for the flue gas.

[0097] It can be understood that in the oil liquid heated by the heating assembly 116, the binding force between the solid substances and the oil liquid may change. Some solid substances that were originally tightly attached to the oil liquid may be more easily separated from the oil liquid after heating. In the oil-powder separation device 30, this change makes the separation process smoother, enabling the solid substances to be separated from the oil liquid more efficiently, improving the working efficiency and separation effect of the oil-powder separation device 30, and at the same time helping to extend the service life of the oil liquid and reduce the operating cost.

[0098] It should be noted that the stirring assembly 115 and the heating assembly 116 can work simultaneously or separately. In this embodiment, while the stirring assembly 115 is stirring, the heating assembly 116 can heat, so that the oil in the first oil storage tank 11 is heated more evenly and stirred more evenly. Further, when the oil in the first oil storage tank 11 needs to be replaced, the stirring assembly 115 and the heating assembly 116 can work to prevent the oil from solidifying and the like, so as to pump the oil in the first oil storage tank 11 into the oil unloading vehicle for recovery.

[0099] Further, a pressure transmitter 117 is provided at the top of the first oil storage tank 11 for measuring the pressure fluctuation in the first oil storage tank 11.

[0100] Further, an oil storage tank rupture port 118 is provided at the top of the first oil storage tank 11. The oil storage tank rupture port 118 is used to install a rupture disk to avoid the safety risk of excessive pressure in the first oil storage tank 11 under extreme working conditions.

[0101] Further, a high liquid level gauge 119 is provided in the upper middle part of the first oil storage tank 11. The high liquid level gauge 119 is used to prompt the safety risk of excessive liquid level in the first oil storage tank 11. At the same time, a low liquid level gauge 1110 is provided in the lower middle part of the first oil storage tank 11. The low liquid level gauge 1110 is used to prompt the safety risk of too low liquid level in the first oil storage tank 11. Among them, the low liquid level gauge 1110 and the oil pump assembly can be programmed to interlock. When the liquid level in the first oil storage tank 11 is too low and the low liquid level gauge 1110 alarms, the power supply of the oil pump assembly can be disconnected to stop transporting the oil in the first oil storage tank 11 to the spraying device 20.

[0102] Please refer to Figures 1 to 6 , in one embodiment, the plurality of oil storage tanks further includes a second oil storage tank 12, and the second oil storage tank 12 communicates with the bottom of the spraying tank 23.

[0103] It should be noted that the structure of the second oil storage tank body 12 is the same as that of the first oil storage tank body 11. A corresponding stirring assembly 115 and heating assembly 116 can also be provided inside the second oil storage tank body 12, which will not be elaborated in this application. The second oil storage tank body 12 can also be used to store oil liquid. In this embodiment, the oil pump assembly is connected to both the first oil storage tank body 11 and the second oil storage tank body 12. When the content of solid substances in the oil liquid in the first oil storage tank body 11 is relatively high, the oil pump assembly can pump out the oil liquid in the second oil storage tank body 12 and transport it to the spraying device 20 for spraying. And when the content of solid substances in the oil liquid in the second oil storage tank body 12 is also relatively high, it is necessary to replace the oil liquid in both the first oil storage tank body 11 and the second oil storage tank body 12 simultaneously, which can extend the single-time oil liquid usage time of the recovery device 100, reduce the number of oil liquid replacements of the recovery device 100, and thus improve the usage time and flue gas recovery efficiency of the recovery device 100.

[0104] Furthermore, the oil storage device 10 further includes a first stirring liquid outlet valve 131 and a second stirring liquid outlet valve 132. The first stirring liquid outlet valve 131 is communicated with the second oil liquid outlet 112 of the first oil storage tank body 11. Similarly, the second stirring liquid outlet valve 132 is communicated with the oil liquid outlet of the second oil storage tank body 12. By controlling the opening and closing of the first stirring liquid outlet valve 131 and the second stirring liquid outlet valve 132, the oil liquid pumped out by the oil pump assembly from the first oil storage tank body 11 or the second oil storage tank body 12 can be controlled.

[0105] Furthermore, the oil storage device 10 further includes a third stirring liquid outlet valve 133 and a fourth stirring liquid outlet valve 134. The third stirring liquid outlet valve 133 is communicated with the third oil liquid outlet 114 of the first oil storage tank body 11. Similarly, the fourth stirring liquid outlet valve 134 is communicated with the oil liquid outlet of the second oil storage tank body 12. By controlling the opening and closing of the third stirring liquid outlet valve 133 and the fourth stirring liquid outlet valve 134, the oil liquid transported from the first oil storage tank body 11 or the second oil storage tank body 12 to the oil powder separation device 30 can be controlled.

[0106] Furthermore, the oil storage device 10 further includes a first conveying valve 135 and a second conveying valve 136. The first conveying valve 135 is respectively communicated with the bottom of the first oil storage tank body 11 and the spraying tank 23, and the second conveying valve 136 is respectively communicated with the bottom of the second oil storage tank body 12 and the spraying tank 23.

[0107] Specifically, the first conveying valve 135 is communicated with the second oil liquid inlet 111 of the first oil storage tank body 11. Similarly, the second conveying valve 136 is communicated with the oil liquid inlet of the second oil storage tank body 12. By controlling the opening and closing of the first conveying valve 135 and the second conveying valve 136, the oil liquid in the spraying tank 23 can be transported into the first oil storage tank body 11 or the second oil storage tank body 12.

[0108] Further, the oil storage device 10 further includes a first stirring liquid inlet valve 137 and a second stirring liquid inlet valve 138. The first stirring liquid inlet valve 137 is connected to the third oil liquid inlet 113 of the first oil storage tank 11. Similarly, the second stirring liquid inlet valve 138 is connected to the oil liquid inlet of the second oil storage tank 12. By controlling the opening and closing of the first stirring liquid inlet valve 137 and the second stirring liquid inlet valve 138, the oil liquid separated from solid substances can be controlled to be transported by the oil powder separation device 30 to the first oil storage tank 11 or the second oil storage tank 12.

[0109] Please refer to Figures 1 to 6 , in an embodiment, the recovery device 100 further includes a gas supply device 60. The gas supply device 60 includes a gas storage component and a gas supply component. The gas storage component is used to store the protective gas, and the gas supply component is respectively connected to the intake pipe 21, the spray tank 23 and the oil storage device 10. The gas supply component is used to supply the protective gas to the recovery device 100. Specifically, in this embodiment, the gas supply component is used to transport the protective gas to the intake pipe 21, the spray tank 23 and the oil storage device 10.

[0110] Further, the gas supply component includes a first gas supply pipe 61, a second gas supply pipe 62 and a third gas supply pipe 63. The first gas supply pipe 61 is connected to the intake inclined pipe 212 and is used to transport the protective gas to the intake inclined pipe 212. The second gas supply pipe 62 is connected to the spray tank 23 and is used to transport the protective gas to the spray tank 23. The third gas supply pipe 63 is connected to the oil storage device 10 and is used to transport the protective gas to the oil storage device 10.

[0111] Further, the gas supply device 60 further includes a first valve assembly 64, a second valve assembly 65 and a third valve assembly 66. The first valve assembly 64 is arranged on the first gas supply pipe 61. The first valve assembly 64 can be used to control the gas supply situation of the first gas supply pipe 61 and thus control whether to transport the protective gas to the intake inclined pipe 212. The second valve assembly 65 can be used to control the gas supply situation of the second gas supply pipe 62 and thus control whether to transport the protective gas to the spray tank 23. The third valve assembly 66 can be used to control the gas supply situation of the third gas supply pipe 63 and thus control whether to transport the protective gas to the oil storage device 10.

[0112] It should be noted that the first valve assembly 64 includes a gas stop valve and a gas ball valve. The gas stop valve can be manually operated. Under normal working conditions, it can also be equipped with a glass rotor flowmeter at the rear end for use. The gas ball valve can be electrically operated. It is normally closed under normal working conditions and normally open after power failure. The two are connected in parallel. The purpose of the gas stop valve is to meet the failure of the gas ball valve connected in parallel with it due to extreme conditions. It can be manually opened to introduce protective gas. Under normal working conditions, a certain amount of protective gas can also be introduced by adjusting the flowmeter. Optionally, the protective gas includes but is not limited to nitrogen, argon and other gases. Optionally, the second valve assembly 65 has the same structure as the first valve assembly 64, and the third valve assembly 66 has the same structure as the first valve assembly 64, which will not be repeated in this application.

[0113] Furthermore, the gas supply device 60 also includes a first stirring gas valve 53 and a second stirring gas valve 54. The first stirring gas valve 53 is respectively connected to the first oil storage tank body 11 and the third valve assembly 66. The first stirring gas valve 53 is used to control the on-off condition of the protective gas entering the first oil storage tank body 11 through the third valve assembly 66, and the second stirring gas valve 54 is used to control the on-off condition of the protective gas entering the second oil storage tank body 12 through the third valve assembly 66.

[0114] Please refer to Figures 1 to 6 In one embodiment, the recovery equipment 100 also includes a flue gas oxygen content analyzer 55 and a controller, the flue gas oxygen content analyzer 55 and the controller are electrically connected, the flue gas oxygen content analyzer 55 is connected to the spray tank 23, and the controller is electrically connected to the gas supply device 60. The flue gas oxygen content analyzer 55 is used to detect the oxygen content of the flue gas in the spray tank 23, and the controller controls the gas supply device 60 according to the detection signal of the flue gas oxygen content analyzer 55.

[0115] The flue gas oxygen content analyzer 55 can be interlocked with the first valve assembly 64, the second valve assembly 65 and the third valve assembly 66. In other words, when the oxygen content of the flue gas in the spray tank 23 is greater than or equal to the set value, the controller can open the first valve assembly 64, the second valve assembly 65 and the third valve assembly 66 according to the detection signal of the flue gas oxygen content analyzer 55, and deliver the protective gas to each pipeline of the recovery device 100 to replace the oxygen, and then close it when the oxygen content in the spray tank 23 is less than the set value, so as to prevent accidents such as combustion or explosion from occurring in the recovery device 100.

[0116] Further, the recycling device 100 further includes a flue gas analysis ball valve 56. The flue gas analysis ball valve 56 is disposed between the flue gas oxygen content analyzer 55 and the spray tank 23, and the flue gas analysis ball valve 56 is connected to the flue gas oxygen content analyzer 55 through a pipeline. The flue gas analysis ball valve 56 can control the on-off of the flue gas, so as to control the disconnection of the flue gas when the filter of the gas purification device in front of the flue gas oxygen content analyzer 55 needs to be replaced.

[0117] Optionally, in other embodiments, the flue gas oxygen content analyzer 55 can also be disposed in other structures of the recycling device 100, such as the intake pipeline 21, etc. Moreover, the number of the flue gas oxygen content analyzers 55 can also be multiple, and the present application does not limit this.

[0118] It should be noted that in the drawings of the present application, for the sake of convenience of display only, the flue gas ventilation butterfly valve 52, the flue gas oxygen content analyzer 55, and the second valve assembly 65 are connected to the same position of the spray tank 23. In actual situations, the flue gas ventilation butterfly valve 52, the flue gas oxygen content analyzer 55, and the second valve assembly 65 are connected to different interfaces of the spray tank 23, which should not be construed as a limitation to the present application.

[0119] Please refer to Figures 1 to 6 Furthermore, in one embodiment, the recycling device 100 further includes a first temperature sensor 71. The first temperature sensor 71 is disposed in the intake inclined pipe 212. The first temperature sensor 71 is electrically connected to the controller. The first temperature sensor 71 is used to detect the temperature of the flue gas in the intake inclined pipe 212, and the controller controls the gas supply device 60 according to the detection signal of the first temperature sensor 71.

[0120] The first temperature sensor 71 can be interlocked with the first valve assembly 64, the second valve assembly 65, and the third valve assembly 66. In other words, when the monitored temperature of the first temperature sensor 71 in the intake inclined pipe 212 ≥ the flash point / ignition point value of the used oil (generally, it can be reduced by 30 - 40 °C according to the actual situation. For example, if the flash point of the oil is 160 °C and the ignition point is 168 °C, the alarm response value is set to 120 °C), the controller automatically opens the first valve assembly 64, the second valve assembly 65, and the third valve assembly 66, and introduces a protective gas into each pipeline of the recycling device 100 to reduce the oxygen content in each pipeline of the recycling device 100. Further, if the monitored temperature of the first temperature sensor 71 in the intake inclined pipe 212 keeps rising, the flow rate of the introduced protective gas is maintained; if the temperature drops, the flow rate of the introduced protective gas is reduced; if the temperature returns to the normal range, the introduction of the protective gas can be closed.

[0121] Please refer to Figures 1 to 7 , Figure 7 is a schematic structural diagram of a liquid inlet heat exchange system provided by an embodiment of the present application.

[0122] In one embodiment, the recovery device 100 further includes a liquid inlet heat exchange system 80. One end of the liquid inlet heat exchange system 80 is connected to the oil storage device 10, and the other end is connected to the spraying device 20. Moreover, the liquid inlet heat exchange system 80 is respectively connected to the oil storage device 10 and the first transmission component 22, and the liquid inlet heat exchange system 80 is used to cool the oil by heat exchange.

[0123] Among them, the flue gas generated by the flue gas generating device 200 generally carries a certain amount of heat. If the temperature of the oil in the recovery device 100 is too high, it is easy to cause functional damage to each component in the recovery device 100, or safety problems such as combustion or explosion due to the too high temperature in the recovery device 100. By using the liquid inlet heat exchange system 80 to cool the oil by heat exchange, the service life and use safety of the recovery device 100 can be improved.

[0124] Furthermore, the liquid inlet heat exchange system 80 includes an oil inlet 81, an oil outlet 82, a refrigerant inlet 83, and a refrigerant outlet 84. The oil inlet 81 is connected to the oil storage device 10, the oil outlet 82 is connected to the spraying device 20, and the refrigerant inlet 83 is used for the refrigerant to enter the liquid inlet heat exchange system 80. The refrigerant outlet 84 is used to discharge the refrigerant.

[0125] Please refer to Figures 1 to 7 , furthermore, in one embodiment, the recovery device 100 further includes a second temperature sensor 72, a third temperature sensor 73 and a controller. The second temperature sensor 72 and the third temperature sensor 73 are both electrically connected to the controller. The second temperature sensor 72 is arranged between the oil storage device 10 and the liquid inlet heat exchange system 80, and the third temperature sensor 73 is arranged in the oil storage device 10. The second temperature sensor 72 and the third temperature sensor 73 are used to detect the temperature of the oil, and the controller controls the liquid inlet heat exchange system 80 according to the detection signals of the second temperature sensor 72 and the third sensor.

[0126] Specifically, the second temperature sensor 72 is arranged between the oil storage device 10 and the liquid inlet heat exchange system 80, and the second temperature sensor 72 is program-interlocked with the liquid inlet heat exchange system 80. In other words, when the temperature of the oil pumped out from the oil storage device 10 ≥ the set value (the set value can maintain the appropriate viscosity range of the oil while ensuring safety), the liquid inlet heat exchange system 80 is turned on to cool the oil by heat exchange.

[0127] Specifically, the third temperature sensor 73 is arranged inside the first oil storage tank 11 of the oil storage device 10, and the third temperature sensor 73 is in program interlock with the liquid inlet heat exchange system 80. In other words, when the temperature of the oil liquid in the first oil storage tank 11 ≥ the set value (under the premise of ensuring safety, the temperature can be maintained within the appropriate range to keep the viscosity of the oil liquid suitable), the liquid inlet heat exchange system 80 is opened to cool the oil liquid by heat exchange. Optionally, the recovery device 100 further includes a fourth temperature sensor arranged inside the second oil storage tank 12. The function and principle of the fourth temperature sensor are the same as those of the third temperature sensor 73, and the present application does not limit this.

[0128] Please refer to Figures 1 to 7 , in an embodiment, the recovery device 100 further includes a liquid inlet flowmeter 57. The liquid inlet flowmeter 57 is arranged between the spraying device 20 and the oil storage device 10, and the liquid inlet flowmeter 57 is used to dynamically detect the instantaneous flow rate, cumulative flow rate, and pressure value of the oil liquid inlet.

[0129] In an embodiment, the recovery device 100 further includes an oil inlet check valve 58. The oil inlet check valve 58 is arranged between the spraying device 20 and the oil storage device 10 to prevent phenomena such as backflow of the oil liquid. Further, in this embodiment, the liquid inlet flowmeter 57 and the oil inlet check valve 58 are respectively arranged on both sides of the liquid inlet heat exchange system 80, and the liquid inlet flowmeter 57 is arranged close to the spraying device 20, and the oil inlet check valve 58 is arranged close to the oil storage device 10.

[0130] In an embodiment, the recovery device 100 further includes an oil liquid sampling port 74 and an oil liquid sampling ball valve 75. The oil liquid sampling port 74 and the oil liquid sampling ball valve 75 are arranged between the oil storage device 10 and the spraying device 20. The oil liquid sampling ball valve 75 is used to open and close the oil liquid in the pipeline, and the oil liquid sampling port 74 is used to sample the oil liquid to dynamically measure the changes in the flash point, ignition point, and viscosity value of the oil liquid during the circulation process.

[0131] In an embodiment, the recovery device 100 further includes an oil inlet pressure gauge 76. The oil inlet pressure gauge 76 is used to measure the pressure value of the oil liquid. In this embodiment, the oil inlet pressure gauge 76 and the oil liquid sampling ball valve 75 are in parallel.

[0132] Please refer to Figures 1 to 8 , Figure 8 is a schematic structural diagram of an oil powder separation device provided by an embodiment of the present application.

[0133] In an embodiment, the oil powder separation device 30 includes a main drive motor 31, a sub-drive motor 32, a separation drum 33, a separation device liquid inlet 34, a separation device liquid outlet 35, a separation device slag outlet 36, and a slag cleaning structure 37.

[0134] Among them, the main drive motor 31 provides power for the core component (separation drum 33) of the oil powder separation device 30, driving the separation drum 33 to rotate at high speed to generate centrifugal force for separating oil from solid particles (solid substances). The auxiliary drive motor 32 is usually used to drive the auxiliary functional components of the oil powder separation device 30 (such as the slag discharge cleaning structure 37) to ensure the continuity and efficiency of the separation process.

[0135] Among them, the liquid inlet 34 of the separation device is connected to the separation oil pump 41, and the oil in the oil storage device 10 is transported to the oil powder separation device 30 through the separation oil pump 41 for separation.

[0136] Among them, the liquid outlet 35 of the separation device is connected to the separation liquid outlet valve 49, and is connected to the oil storage device 10 through the separation liquid outlet valve 49 to transport the oil after separating solid substances to the first oil storage tank 11 or the second oil storage tank 12.

[0137] Among them, the slag outlet 36 of the separation device is connected to an external collection device, which is used to collect the solid substances separated by the oil powder separation device 30 and carry out subsequent processes such as asphalt preparation on the solid substances.

[0138] Please refer to Figures 1 to 9 , Figure 9 which is a flowchart of a flue gas recovery method provided by an embodiment of the present application.

[0139] In one embodiment, the present application also provides a flue gas recovery method. The flue gas recovery method recovers flue gas through the recovery device 100. The flue gas recovery method includes step S100, step S200, and step S300. The detailed descriptions of step S100, step S200, and step S300 are as follows.

[0140] S100: Transport the flue gas generated by the flue gas generating device 200 to the spraying device 20.

[0141] S200: Transport the oil in the oil storage device 10 to the spraying device 20 and spray the flue gas.

[0142] S300: Transport the oil in the oil storage device 10 after spraying to the oil powder separation device 30 for solid-liquid separation.

[0143] Among them, step S300 includes: transporting the oil in the spraying tank 23 to the oil storage device 10, and transporting the oil in the oil storage device 10 to the oil powder separation device 30 for solid-liquid separation. After step S300, it also includes: transporting the oil after separating solid substances back to the oil storage device 10.

[0144] In the flue gas recovery method provided by this application, the flue gas generated by the flue gas generating device 200 is transported to the spray tank 23, the oil liquid in the oil storage device 10 is transported to the spray tank 23 for spraying, the oil liquid in the spray tank 23 is transported to the oil storage device 10, and the oil liquid in the oil storage device 10 is transported to the oil powder separation device 30 for solid matter separation. By spraying the oil liquid to adsorb the flue gas, and utilizing the similar phase solubility characteristic between oils, the adsorption effect on particulate matter, tar, pitch fume and other organic matters in the flue gas can be improved. Moreover, the particulate matter, tar, pitch fume and other organic matters in the flue gas adsorbed by the oil liquid will not adhere to the pipelines of the recovery device 100 and the inner walls of each tank, so there is no need to shut down production for pipeline cleaning, which reduces the labor intensity of workers, improves the working environment of workers, and increases production capacity. By setting the oil powder separation device 30, the oil liquid can be recycled, the cost of recovering flue gas can be reduced, and the separated solid matter (particulate matter escaping from the flue gas) can be recycled through the oil powder separation device 30, which can improve the recovery efficiency and production yield of the recovery device 100.

[0145] In this application, the mention of "embodiment" or "implementation manner" means that the specific features, structures or characteristics described in combination with the embodiment may be included in at least one embodiment of this application. The appearance of the above phrases in various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art understand explicitly and implicitly that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in each embodiment of this application can be combined arbitrarily without contradiction to form another embodiment that does not deviate from the spirit and scope of the technical solution of this application.

[0146] The above are some implementation manners of this application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of this application.

Claims

1. A recycling device, characterized in that, For recovering the flue gas generated by a flue gas generating device, comprising: An oil storage device for storing oil liquid; A spraying device, which includes an intake pipe and a spraying tank. The two ends of the intake pipe are respectively connected to the flue gas generating device and the spraying tank. The intake pipe is used to transport the flue gas generated by the flue gas generating device to the spraying tank, and the top and bottom of the spraying tank are connected to the oil storage device; and An oil powder separation device connected to the bottom of the oil storage device, and the oil powder separation device is used for solid-liquid separation of the oil liquid.

2. The recycling device according to claim 1, characterized in that, The intake pipe includes an intake straight pipe and an intake inclined pipe connected to each other. The extending direction of the intake straight pipe is perpendicular to the horizontal plane. One end of the intake straight pipe away from the intake inclined pipe is connected to the flue gas generating device, and one end of the intake inclined pipe away from the intake straight pipe is connected to the spraying tank. The flue gas generated by the flue gas generating device enters the spraying tank through the intake straight pipe and the intake inclined pipe in sequence.

3. The recycling device according to claim 2, characterized in that, Nozzles are provided in the intake inclined pipe and / or the spraying tank for spraying the flue gas.

4. The recycling device according to claim 1, characterized in that, The recovery device further includes a flue gas centrifugal fan, and the flue gas centrifugal fan is connected to the spraying tank.

5. The recovery device according to claim 1, characterized in that, The oil storage device includes an oil storage tank body and a stirring assembly. The stirring assembly is arranged in the oil storage tank body and is used for stirring the oil liquid in the oil storage tank body.

6. The recycling device according to claim 4, characterized in that, The oil storage device further includes a heating assembly arranged at the bottom of the oil storage tank body, and the heating assembly is used for heating the oil liquid in the oil storage tank body.

7. The recycling device according to claim 1, characterized in that, The recovery device further includes a gas supply device, which includes a gas storage assembly and a gas supply assembly. The gas storage assembly is used for storing protective gas, and the gas supply assembly is used for providing protective gas to the recovery device.

8. The recovery device according to claim 7, characterized in that, The recovery device further includes a flue gas oxygen content analyzer and a controller. The flue gas oxygen content analyzer and the controller are electrically connected. The flue gas oxygen content analyzer is used for detecting the oxygen content of the flue gas in the spraying tank, and the controller controls the gas supply device according to the detection signal of the flue gas oxygen content analyzer.

9. The recycling device according to claim 7, wherein, The recovery device further includes a first temperature sensor arranged in the intake inclined pipe. The first temperature sensor is electrically connected to the controller. The first temperature sensor is used for detecting the temperature of the flue gas in the intake inclined pipe, and the controller controls the gas supply device according to the detection signal of the first temperature sensor.

10. The recycling device according to claim 1, characterized in that, The recovery device further includes a liquid inlet heat exchange system. One end of the liquid inlet heat exchange system is connected to the oil storage device, and the other end is connected to the spraying device. The liquid inlet heat exchange system is used for heat exchange and cooling of the oil liquid.

11. The recovery device according to claim 10, characterized in that, The recovery device further includes a second temperature sensor, a third temperature sensor and a controller. The second temperature sensor and the third temperature sensor are both electrically connected to the controller. The second temperature sensor is disposed between the oil storage device and the liquid inlet heat exchange system, and the third temperature sensor is disposed inside the oil storage device. The second temperature sensor and the third temperature sensor are used to detect the temperature of the oil liquid, and the controller controls the liquid inlet heat exchange system according to the detection signals of the second temperature sensor and the third sensor.

12. A flue gas recovery method, characterized in that, Performing flue gas recovery by using the recovery device according to any one of claims 1-11, the flue gas recovery method includes: Transporting the flue gas generated by the flue gas generating device to the spraying device; Transporting the oil liquid in the oil storage device to the spraying device and spraying the flue gas; Transporting the oil liquid in the oil storage device after spraying to the oil powder separation device for solid-liquid separation.

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