A thermal cracking mixed oil refining equipment

Abstract

The utility model proposes a pyrolysis mixed oil refining equipment, which belongs to the field of pyrolysis recovery and treatment technology. The pyrolysis mixed oil refining equipment includes a tubular heating furnace and a distillation tower; the tubular heating furnace is vertically arranged, including a furnace body, a heating coil arranged in the furnace body, and a furnace arranged at the bottom of the furnace body; the inner side of the furnace body and the heating coil define a storage space for accommodating pyrolysis oil; the side of the furnace body is provided with a first tubular heating furnace oil inlet, a second tubular heating furnace oil inlet and a tubular heating furnace gas outlet from top to bottom; the pyrolysis oil vapor after pyrolysis and condensation enters the storage space through the first tubular heating furnace oil inlet. The utility model solves the technical problems that the existing pyrolysis oil has a limited scope of application and low economic efficiency due to a large number of impurities, and has the characteristics of being able to effectively remove impurities in pyrolysis oil, ensure oil quality, and improve economic efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal cracking recovery treatment, and in particular relates to a thermal cracking mixed oil refining device. Background Art

[0002] The accumulation of a large number of waste tires not only occupies land, but also easily causes fires and causes environmental pollution. Recycling waste tires can not only alleviate their pressure on the environment and reduce pollution, but also achieve effective recycling of resources. At present, the methods for treating waste tires include prototype modification, production of recycled rubber and rubber powder, incineration and pyrolysis. Among them, pyrolysis technology is a very potential method for treating waste tires. It is to thermally decompose waste tires in anoxic or inert gas to produce pyrolysis gas, pyrolysis oil and carbon residue, etc. These products can be further processed and converted into high-value products with various uses. Compared with traditional treatment methods, pyrolysis can not only recover high value-added products, but also recover nearly 70% of energy, with high economic and environmental benefits.

[0003] Waste tires are converted into pyrolysis oil after pyrolysis. In this process, the main polymer macromolecules in the tire rubber undergo fission and break, and then repolymerize, and the product is polymerized into a variety of olefins. Waste tire pyrolysis oil mainly comes from the pyrolysis products of the rubber colloid itself, the organic additives in the rubber and their pyrolysis products, and the operating oil in the rubber production formula. It is a complex mixture. It is called "tire oil", also known as "pyrolysis oil", "heavy oil" and "crude oil", and is an industrial fuel. This primary oil extracted from waste tires has a high viscosity. It is neither diesel nor gasoline. It can usually be used as a fuel and directly replaces fuel for industrial or boiler heating, such as cement plants, steel plants, glass plants, etc. However, if the pyrolysis oil is not purified, heated and distilled, its scope of use is limited, and the economic efficiency is also very low, which leads to many pyrolysis companies not making money, making it difficult for companies in this industry. Utility Model Content

[0004] Details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0005] The utility model provides a thermal cracking mixed oil refining device, which solves the technical problems of limited application scope and low economic efficiency of existing cracking oil due to more impurities, and has the characteristics of effectively removing impurities in cracking oil, ensuring oil quality and improving economic efficiency.

[0006] The utility model discloses a pyrolysis mixed oil refining device, comprising a tubular heating furnace and a distillation tower; the tubular heating furnace is arranged vertically, comprising a furnace body, a heating coil arranged in the furnace body, and a furnace arranged at the bottom of the furnace body; the inner side of the furnace body and the heating coil define a storage space for accommodating pyrolysis oil; the side of the furnace body is provided with a first tubular heating furnace oil inlet, a second tubular heating furnace oil inlet and a tubular heating furnace air outlet in sequence from top to bottom; the pyrolysis oil vapor after pyrolysis and condensation enters the storage space through the first tubular heating furnace oil inlet; the distillation tower is arranged vertically, comprising a distillation tower oil outlet opened at the bottom, and a distillation tower air inlet opened below the side of the distillation tower; the distillation tower oil outlet is connected to the second tubular heating furnace oil inlet, and the distillation tower air inlet is connected to the tubular heating furnace air outlet.

[0007] In some embodiments, the furnace body includes a first furnace body and a second furnace body that are connected, the inner surfaces of the first furnace body and the second furnace body each define a cylindrical space, the first furnace body is located above the second furnace body, and the inner diameter of the first furnace body is smaller than the inner diameter of the second furnace body.

[0008] In some embodiments, the oil inlet of the first tubular heating furnace is opened on the side of the first furnace body, and the oil inlet of the second tubular heating furnace and the gas outlet of the tubular heating furnace are opened on the side of the second furnace body.

[0009] In some embodiments, the arrangement density of the heating coils in the first furnace body is less than the arrangement density of the heating coils in the second furnace body.

[0010] In some embodiments, a chimney is provided on the top of the first furnace body.

[0011] In some embodiments, a condenser and a cooling oil collecting tank connected to the oil outlet at the bottom of the condenser are further included. The cooling oil collecting tank is connected to the oil inlet of the first tubular heating furnace through a pipeline, and a centrifugal oil pump is provided on the pipeline.

[0012] In some embodiments, the condenser includes a first condenser and a second condenser, the oil outlet at the lower side of the first condenser is connected to the oil inlet at the upper side of the second condenser, and the oil inlet of the first condenser is arranged above the side of the first condenser; the bottoms of the first condenser and the second condenser are connected to the cooling oil collection tank.

[0013] In some embodiments, the bottoms of the first condenser and the second condenser are connected to the cooling oil collecting tank via a choke pipe.

[0014] In some of the embodiments, a cyclone dust removal tower connected to the oil inlet of the first condenser is also included.

[0015] In some embodiments, a first distillation tower gas outlet is provided at the lower part of the side of the distillation tower, a second distillation tower gas outlet is provided in the middle part of the side, and a third distillation tower gas outlet is provided at the top, the first distillation tower gas outlet and the second distillation tower gas outlet are connected to a first heat exchanger, and the third distillation tower gas outlet is connected to the second heat exchanger.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model proposes a pyrolysis mixed oil refining device, which ensures the full vaporization of the pyrolysis oil in the tubular heating furnace by arranging a tubular heating furnace and a distillation tower, and limits the structure of the tubular heating furnace and the arrangement method of the inlet and outlet of the tubular heating furnace and the distillation tower, and realizes further vaporization of the liquid pyrolysis oil produced in the distillation tower through the tubular heating furnace, thereby fully removing impurities in the pyrolysis oil, realizing the refining of the pyrolysis oil, ensuring the quality of the oil product, and improving the economic benefit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of a thermal cracking mixed oil refining device provided in an embodiment of the utility model;

[0020] In the above figures: 1. tubular heating furnace; 11. heating coil; 12. furnace; 13. oil inlet of the first tubular heating furnace; 14. oil inlet of the second tubular heating furnace; 15. gas outlet of the tubular heating furnace; 2. distillation tower; 3. chimney; 4. first condenser; 5. second condenser; 6. cooling oil collection tank; 7. cyclone dust removal tower; 8. first heat exchanger; 9. second heat exchanger. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described and illustrated in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. Based on the embodiments provided by the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] The utility model provides a thermal cracking mixed oil refining device. Figure 1 The figure is a schematic diagram of the structure of the thermal cracking mixed oil refining equipment according to the embodiment of the utility model. Figure 1 As shown, the pyrolysis mixed oil refining equipment at least includes a tubular heating furnace 1 and a distillation tower 2; the tubular heating furnace 1 is vertically arranged, including a furnace body, a heating coil 11 coiled in the furnace body, and a furnace 12 arranged at the bottom of the furnace body; the inner side of the furnace body and the heating coil 11 define a storage space for accommodating pyrolysis oil; the side of the furnace body is provided with a first tubular heating furnace oil inlet 13, a second tubular heating furnace oil inlet 14 and a tubular heating furnace air outlet 15 in sequence from top to bottom; the pyrolysis oil vapor after pyrolysis and condensation enters the storage space through the first tubular heating furnace oil inlet 13; the distillation tower 2 is vertically arranged, including an oil outlet of the distillation tower 2 opened at the bottom, and an air inlet of the distillation tower 2 opened at the lower side of the distillation tower 2; the oil outlet of the distillation tower 2 is connected to the oil inlet 14 of the second tubular heating furnace, and the air inlet of the distillation tower 2 is connected to the air outlet 15 of the tubular heating furnace. The pyrolysis mixed oil refining equipment is provided with a tubular heating furnace 1 and a distillation tower 2, and at the same time limits the structure of the tubular heating furnace 1, and the setting mode of the inlet and outlet of the tubular heating furnace 1 and the distillation tower 2, so as to ensure the full vaporization of the pyrolysis oil in the tubular heating furnace 1, and at the same time realizes the further vaporization of the liquid pyrolysis oil produced in the distillation tower 2 through the tubular heating furnace 1, thereby fully removing the impurities in the pyrolysis oil, realizing the refining of the pyrolysis oil, ensuring the quality of the oil product, and improving the economic benefits. The above equipment performs online distillation treatment on the industrial fuel oil produced, removes the impurities, acid, alkali and other harmful components therein, obtains high-quality fuel oil and diesel and other petroleum products, and solves the problems that have long plagued the survival and development of pyrolysis production enterprises, such as the high carbon residue, high specific gravity and low price of the pyrolysis mixed oil.

[0023] In the above embodiment, it is specifically defined that the first tubular heating furnace oil inlet 13, the second tubular heating furnace oil inlet 14 and the tubular heating furnace gas outlet 15 are sequentially arranged on the side of the furnace body from top to bottom. The reason is that the pyrolysis oil vapor after pyrolysis and condensation is a gas-liquid mixture. After entering the storage space of the furnace body through the first tubular heating furnace oil inlet 13 arranged above the furnace body, it flows from top to bottom. At the same time, this process performs heat exchange with the heating coil 11, and after fully receiving the heat provided by the heating coil 11, it is evaporated and vaporized at the bottom of the furnace body. At the same time, the tubular heating furnace gas outlet 15 arranged at the bottom of the furnace body enters the distillation tower 2 for distillation. The liquid oil produced after distillation by the distillation tower 2 further enters the storage space of the furnace body through the second tubular heating furnace oil inlet 14, and then flows from top to bottom. At the same time, this process performs heat exchange with the heating coil 11, and after fully receiving the heat provided by the heating coil 11, it is evaporated and vaporized again at the bottom of the furnace body, thereby realizing multiple cycles of refining of the pyrolysis oil and ensuring sufficient removal of impurities. It should be noted that the oil inlet 14 of the second tubular heating furnace is arranged below the oil inlet 13 of the first tubular heating furnace. The reason is that the impurities in the liquid pyrolysis oil distilled by the distillation tower 2 are relatively less than the pyrolysis oil vapor after pyrolysis and condensation entering from the oil inlet 13 of the first tubular heating furnace.

[0024] In order to ensure that the pyrolysis oil entering the furnace body can be fully vaporized, the furnace body includes a first furnace body and a second furnace body that are connected, the inner surfaces of the first furnace body and the second furnace body each define a cylindrical space, the first furnace body is located above the second furnace body, and the inner diameter of the first furnace body is smaller than the inner diameter of the second furnace body. Further, the first tubular heating furnace oil inlet 13 is opened on the side of the first furnace body, the second tubular heating furnace oil inlet 14 and the tubular heating furnace air outlet 15 are opened on the side of the second furnace body; the setting density of the heating coil 11 in the first furnace body is smaller than the setting density of the heating coil 11 in the second furnace body; a chimney 3 is provided on the top of the first furnace body.

[0025] The discharge port of the centrifugal oil pump is provided with an oil pipeline flow control valve, and the mixed oil pumped by the pump enters the first tubular heating furnace oil inlet 13, which is arranged at the upper part of the furnace body, and the furnace chimney 3 is arranged at the top. A temperature remote sensor is arranged on the left side of the upper head of the furnace body, which is interlocked with the burner to control the heating temperature in the furnace. A pressure remote sensor is arranged on the right side of the upper head of the upper furnace body of the tubular heating furnace 1, which is interlocked with the centrifugal oil pump to control the system pressure in the furnace. The main coil oil vapor outlet of the tubular heating furnace 1 (the outlet port 15 of the tubular heating furnace) is arranged at the lower right side of the furnace body and connected to the oil vapor outlet flow control valve. The oil inlet of the bottom oil coil of the tubular heating furnace 1 (the oil inlet port 14 of the second tubular heating furnace) is arranged at the upper right side of the furnace body, and is connected to the oil inlet pipeline of the bottom oil coil of the tubular heating furnace 1. The oil outlet of the bottom oil coil of the tubular heating furnace 1 is arranged at the lower right side of the furnace body, and merges with the front end pipeline of the oil vapor outlet flow control valve. The burner of tubular heating furnace 1 is arranged at the lower left part of the furnace body, and is installed on the furnace 12 of tubular heating furnace 1 to provide heat for the furnace body. The oil vapor outlet of tubular heating furnace 1 is arranged at the lower right part of the furnace body, connected with the oil vapor outlet flow control valve, and connected with the oil vapor inlet of distillation tower 2, so as to provide the high-temperature oil vapor required for fractionation to distillation tower 2. The air inlet of distillation tower 2 is arranged at the lower left part of the tower body, and the bottom of distillation tower 2 is provided with a heavy component and a slag discharge port. The slag discharge port pipe of distillation tower 2 is provided with a heavy component outlet, and the discharged slag directly enters the sewage collection tank of distillation tower 2. The lower right part of distillation tower 2 is provided with a side line lower oil vapor fraction outlet, and the upper right part of distillation tower 2 is provided with a side line upper oil vapor fraction outlet. The upper side line oil vapor fraction outlet and the lower side line oil vapor fraction outlet share an oil pipeline to transport the fractionated oil vapor, and the side line oil pipeline of distillation tower 2 is provided with a control valve.

[0026] In order to preliminarily cool down the pyrolysis oil produced by high-temperature cracking, it also includes a condenser and a cooling oil collecting tank 6 connected to the oil outlet at the bottom of the condenser. The cooling oil collecting tank 6 is connected to the oil inlet 13 of the first tubular heating furnace through a pipeline, and a centrifugal oil pump is provided on the pipeline; the condenser includes a first condenser 4 and a second condenser 5, the oil outlet at the lower side of the first condenser 4 is connected to the oil inlet at the upper side of the second condenser 5, and the oil inlet of the first condenser 4 is arranged above the side of the first condenser 4; the bottoms of the first condenser 4 and the second condenser 5 are connected to the cooling oil collecting tank 6; the bottoms of the first condenser 4 and the second condenser 5 are connected to the cooling oil collecting tank 6 through an air blocking pipe.

[0027] The lower part of the tower body of the cyclone dust removal tower 7 is provided with a heavy oil outlet, and the unloading is controlled by an electric gate valve. The high-temperature oil vapor outlet of the cyclone dust removal tower 7 is arranged at the upper right part of the tower body and is connected to the high-temperature oil vapor delivery pipeline. The high-temperature oil vapor delivered by the cyclone dust removal tower 7 first enters the first condenser 4, and then enters the second condenser 5. The first condenser 4 and the second condenser 5 are installed vertically and work in series. The oil inlet of the first condenser 4 is arranged on the left side of the upper head, and an on-site pressure gauge is arranged in the middle of the upper head. The cylinder of the first condenser 4 is provided with cooling tubes, the oil vapor runs through the tube side, and the cooling water runs through the shell side. The oil vapor outlet of the first condenser 4, that is, the oil outlet, is arranged on the right side of the lower head and is connected to the inlet of the oil vapor connection pipeline. The cooling oil outlet of the first condenser 4 is arranged at the lower head and is connected to the pipeline sight glass of the first condenser 4. The oil inlet of the second condenser condenser is set on the left side of the upper head, and the second condenser 5 on-site pressure gauge is set in the middle of the upper head. The second condenser 5 is provided with cooling tubes in the cylinder, and the cooling oil outlet is set in the lower head and connected to the pipeline sight glass. In order to prevent the cooling oil outlet of the lower head of the first condenser 4 from causing a circuit breaker, a cooling oil collection air blocking pipe is also set at the outlet of the pipeline sight glass of the first condenser 4. This setting only allows liquid to pass through, which can effectively prevent oil vapor from directly entering the cooling oil collection tank 6 without condensation. The oil outlet of the pipeline sight glass of the second condenser 5 is provided with an oil pipeline, and the oil cooled by the first condenser 4 and the second condenser 5 directly enters the cooling oil collection tank 6 for buffering. A negative pressure system fan is set on the left side of the tank body of the cooling oil collection tank 6 to suck the negative pressure of the pyrolysis system so that the pyrolysis system is always kept in a slightly negative pressure state. An oil outlet is set at the lower part of the tank body of the cooling oil collection tank 6, and a control valve is set at the oil outlet, which is connected to the feed port of the centrifugal oil pump.

[0028] In addition, in order to ensure the dust removal effect, a cyclone dust removal tower 7 connected to the oil inlet of the first condenser 4 is also included. The high-temperature oil vapor separated by the high-temperature pyrolysis kettle of the waste tire contains carbon black dust and other granular impurities. If it is not separated and removed in the early stage, it will seriously block the condensing device and the conveying pipeline over a long period of time during the backward transportation process. Therefore, a cyclone dust removal tower 7 is set at the front of the oil refining. The pyrolysis mixed oil inlet is set on the left side of the top of the cyclone dust removal tower 7 and is connected to the pyrolysis high-temperature oil vapor delivery pipeline. The top of the cyclone dust removal tower 7 is provided with a temperature remote sensor and a pressure remote sensor, which are used to interlock with the pyrolysis reactor to control the temperature and pressure of the input high-temperature oil vapor. The cyclone dust collector 7 is provided with 1# cyclone dust collector and 2# cyclone dust collector in the cylinder. The high-temperature oil vapor entering the cyclone dust collector 7 first enters the 1# cyclone dust collector, and the oil vapor containing particles is introduced into the cyclone cylinder. The cyclone cylinder is provided with a guide plate to make the gas flow downward in a vortex shape to remove the carbon black particles and dust in the high-temperature oil vapor. Under the action of the negative pressure system fan, the high-temperature oil vapor is sucked into the 2# cyclone dust collector and moves from bottom to top to the oil and gas outlet. The lower ash discharge pipes of the 1# cyclone dust collector and the 2# cyclone dust collector converge at the left side of the lower cone of the cyclone dust collector 7. The carbon black particles separated from the oil vapor are discharged through the ash discharge port. The ash discharge port is provided with an ash discharge valve to control the ash discharge frequency.

[0029] In order to facilitate the separate storage and processing of the light and heavy components obtained by the distillation tower 2, a first distillation tower 2 gas outlet is provided at the lower side of the distillation tower 2, a second distillation tower 2 gas outlet is provided in the middle of the side, and a third distillation tower 2 gas outlet is provided on the top. The first distillation tower 2 gas outlet and the second distillation tower 2 gas outlet are connected to the first heat exchanger 8, and the third distillation tower 2 gas outlet is connected to the second heat exchanger 9.

[0030] Three layers of floating trays are arranged in the tower body of distillation tower 2. The oil vapor moves from bottom to top by countercurrent process, and the incoming oil vapor is cut by floating trays. An on-site pressure gauge is arranged on the right side of the upper head of distillation tower 2, and a light component outlet is arranged in the middle of the upper head of distillation tower 2. A light component outlet and a control valve are arranged in the middle of the upper head of distillation tower 2. The light component separated by distillation tower 2 enters the light component heat exchanger, the inlet of the light component heat exchanger is arranged in the middle of the upper head, and an on-site pressure gauge is arranged on the left side of the upper head of the light component heat exchanger. The light component cooling oil outlet is arranged in the lower head, and its oil outlet is connected to the collection buffer tank, and is transported and stored by the light component external oil pump. The oil vapor separated by the side line of distillation tower 2 enters the oil vapor heat exchanger, the inlet of the oil vapor heat exchanger is arranged on the right side of the upper head, and an on-site pressure gauge is arranged on the upper head of the oil vapor heat exchanger. The cooling oil outlet of the oil vapor component is arranged in the lower head, and its oil outlet is connected to the collection buffer tank, and is transported and stored by the cooling oil external oil pump.

[0031] The working process of the above-mentioned thermal cracking mixed oil refining equipment is:

[0032] The pyrolysis oil vapor after pyrolysis and condensation is a gas-liquid mixture. After entering the storage space of the furnace body through the first tubular heating furnace oil inlet 13 arranged above the furnace body, it flows from top to bottom. At the same time, this process performs heat exchange with the heating coil 11. After fully receiving the heat provided by the heating coil 11, it is evaporated and vaporized at the bottom of the furnace body. At the same time, the tubular heating furnace outlet 15 arranged at the bottom of the furnace body enters the distillation tower 2 for distillation. The liquid oil produced after distillation by the distillation tower 2 further enters the storage space of the furnace body through the second tubular heating furnace oil inlet 14, and flows from top to bottom. At the same time, this process performs heat exchange with the heating coil 11. After fully receiving the heat provided by the heating coil 11, it is evaporated and vaporized again at the bottom of the furnace body, thereby realizing multiple cycles of refining of the pyrolysis oil and ensuring sufficient removal of impurities.

[0033] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A thermal cracking mixed oil refining device, characterized in that: include A tubular heating furnace, the tubular heating furnace is arranged vertically, comprising a furnace body, a heating coil arranged in the furnace body, and a furnace arranged at the bottom of the furnace body; the inner side of the furnace body and the heating coil define a storage space for accommodating pyrolysis oil; the side of the furnace body is provided with a first tubular heating furnace oil inlet, a second tubular heating furnace oil inlet and a tubular heating furnace gas outlet from top to bottom; the pyrolysis oil vapor after pyrolysis and condensation enters the storage space through the first tubular heating furnace oil inlet; A distillation tower is vertically arranged, comprising an oil outlet of the distillation tower opened at the bottom, and an air inlet of the distillation tower opened at the lower side of the distillation tower; the oil outlet of the distillation tower is connected to the oil inlet of the second tubular heating furnace, and the air inlet of the distillation tower is connected to the air outlet of the tubular heating furnace.

2. The thermal cracking mixed oil refining equipment according to claim 1, characterized in that: The furnace body comprises a first furnace body and a second furnace body which are connected, wherein inner surfaces of the first furnace body and the second furnace body respectively define a cylindrical space, the first furnace body is located above the second furnace body, and an inner diameter of the first furnace body is smaller than an inner diameter of the second furnace body.

3. The thermal cracking mixed oil refining equipment according to claim 2, characterized in that: The oil inlet of the first tubular heating furnace is opened on the side of the first furnace body, and the oil inlet of the second tubular heating furnace and the air outlet of the tubular heating furnace are opened on the side of the second furnace body.

4. The thermal cracking mixed oil refining equipment according to claim 2, characterized in that: The arrangement density of the heating coils in the first furnace body is smaller than the arrangement density of the heating coils in the second furnace body.

5. The thermal cracking mixed oil refining equipment according to claim 2, characterized in that: A chimney is provided on the top of the first furnace body.

6. The thermal cracking mixed oil refining equipment according to claim 1, characterized in that: It also includes a condenser and a cooling oil collection tank connected to the oil outlet at the bottom of the condenser. The cooling oil collection tank is connected to the oil inlet of the first tubular heating furnace through a pipeline, and a centrifugal oil pump is provided on the pipeline.

7. The thermal cracking mixed oil refining equipment according to claim 6, characterized in that: The condenser includes a first condenser and a second condenser, the oil outlet at the lower side of the first condenser is connected to the oil inlet at the upper side of the second condenser, and the oil inlet of the first condenser is arranged above the side of the first condenser; the bottoms of the first condenser and the second condenser are connected to the cooling oil collection tank.

8. The thermal cracking mixed oil refining equipment according to claim 7, characterized in that: The bottoms of the first condenser and the second condenser are connected to the cooling oil collecting tank through a choke pipe.

9. The thermal cracking mixed oil refining equipment according to claim 7, characterized in that: It also includes a cyclone dust removal tower connected to the oil inlet of the first condenser.

10. The thermal cracking mixed oil refining equipment according to claim 1, characterized in that: A first distillation tower gas outlet is provided at the lower side of the distillation tower, a second distillation tower gas outlet is provided in the middle of the side, and a third distillation tower gas outlet is provided at the top. The first distillation tower gas outlet and the second distillation tower gas outlet are connected to the first heat exchanger, and the third distillation tower gas outlet is connected to the second heat exchanger.

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