Carbon black waste heat recovery device

Abstract

This utility model relates to a carbon black waste heat recovery device, belonging to the field of waste heat recovery technology. The carbon black waste heat recovery device includes a reaction shell, a heat exchanger, and a waste heat boiler drum. Boiler feedwater is contained within the reaction shell. The heat exchanger is located inside the reaction shell and is used for heat exchange with the boiler feedwater. The heat exchanger is connected to an oil inlet pipe and an oil outlet pipe. The oil inlet pipe is connected to a raw oil heater, and the oil outlet pipe is connected to an oil tank. The raw oil heater and the oil tank are located outside the reaction shell. The waste heat boiler drum is connected to the outlet of the reaction shell and is used to hold the boiler feedwater after heat exchange with the heat exchanger. The waste heat boiler drum is located outside the reaction shell. Crude oil, after being heated by the raw oil heater, flows into the heat exchanger through the oil inlet pipe and exchanges heat with the boiler feedwater through the heat exchanger. Then, it flows into the oil tank through the oil outlet pipe. This not only cools the crude oil but also transfers the heat carried in the crude oil to the boiler feedwater, achieving heat recovery and utilization.

Description

Technical Field

[0001] This utility model belongs to the field of waste heat recovery technology, and in particular relates to a carbon black waste heat recovery device. Background Technology

[0002] In green carbon black production facilities, coal tar is typically used as raw material, along with auxiliary additives, and undergoes high-temperature incomplete combustion in a carbon black reactor to generate carbon black flue gas containing carbon black and carbon black tail gas. This high-temperature carbon black flue gas flows through a feed oil heater, using its heat to preheat the feed oil. A portion of the preheated high-temperature feed oil needs to be returned to the feed oil storage tank. However, the temperature of this returned oil is too high, easily exceeding the safe operating range of the storage tank, leading to safety hazards.

[0003] In existing technologies, crude oil coolers are typically installed to cool the crude oil flowing back to the crude oil storage tank. These coolers utilize circulating cooling water to lower the temperature of the returned oil. However, the cooling effect of these coolers is limited. To reduce the returned oil to a safe storage temperature below 100°C, the flow rate of the circulating cooling water needs to be significantly increased. This not only increases the operating cost of the circulating cooling water system but also means directly discarding a large amount of usable waste heat, resulting in energy waste. Furthermore, the cooling process and related temperature control currently rely mainly on manual operation by employees. This not only results in low control accuracy and slow response, leading to large fluctuations in the crude oil storage temperature, but also requires operators to frequently adjust the cooling water flow rate to cope with changes in operating conditions, causing extreme labor intensity and making it difficult to achieve continuous and stable temperature control.

[0004] Therefore, it is of great significance to design a device that can recover the waste heat of carbon black and cool the carbon black. Utility Model Content

[0005] In view of the shortcomings of related technologies, this utility model provides a carbon black waste heat recovery device, which makes full use of the waste heat of crude oil by passing the reacted crude oil through a heat exchanger and exchanging heat with the boiler feedwater through the heat exchanger.

[0006] This utility model provides a carbon black waste heat recovery device, comprising: The reaction vessel contains boiler feedwater. A heat exchanger, located inside the reaction shell, is used for heat exchange with boiler feedwater; the heat exchanger is connected to an oil inlet pipe and an oil outlet pipe; the oil inlet pipe is connected to a feedstock oil heater; the feedstock oil heater is located outside the reaction shell and is used to heat crude oil; the oil outlet pipe is connected to an oil tank, which is located outside the reaction shell and is used to recover and store crude oil. The waste heat boiler steam drum is connected to the outlet of the reaction shell and is used to hold the boiler feedwater after heat exchange with the heat exchanger; the waste heat boiler steam drum is located outside the reaction shell. The crude oil is heated by the feedstock heater and then flows into the heat exchanger through the inlet pipe. After exchanging heat with the boiler feedwater through the heat exchanger, it flows into the oil tank through the outlet pipe.

[0007] In this technical solution, a heat exchanger is placed inside the reaction tank, allowing it to exchange heat with the boiler feedwater within the tank. The crude oil flowing into the heat exchanger heats the boiler feedwater, thus recovering heat from the crude oil. By allowing the crude oil to exchange heat with the boiler feedwater before flowing into the oil tank, the boiler feedwater cools the crude oil, preventing excessively high temperatures that could pose safety hazards when it enters the tank. This heat exchange not only cools the crude oil, ensuring its safety as it flows into the oil tank, but also transfers the heat carried by the crude oil into the boiler feedwater, enabling heat recovery and utilization.

[0008] In some embodiments, a boiler feedwater pump is also included, which is connected to the inlet of the reaction vessel and is used to supply boiler feedwater into the reaction vessel.

[0009] In the technical solution, a boiler feedwater pump is installed and connected to the inlet of the reaction shell so that the boiler feedwater flows into the reaction shell to exchange heat with the heat exchanger and then flows into the waste heat boiler steam drum, thus realizing the flow of boiler feedwater.

[0010] In some embodiments, a bypass line is also included, with its two ends connected to the inlet and outlet oil pipes respectively; the bypass line is located outside the reaction tank; a bypass valve is provided on the bypass line to control the opening degree of the bypass line.

[0011] In the technical solution, a bypass pipeline is set up so that the two ends of the bypass pipeline are connected to the oil inlet pipe and the oil outlet pipe respectively, so that crude oil can flow directly into the oil tank through the bypass pipeline without passing through the heat exchanger; by setting a bypass valve on the bypass pipeline to control the opening of the bypass pipeline, crude oil can flow directly into the oil tank through the bypass pipeline when the temperature is not high, without the need for heat exchanger.

[0012] In some embodiments, a first temperature sensor is provided on the oil outlet pipe, and the first temperature sensor is located behind the connection between the bypass pipe and the oil outlet pipe along the flow path of the crude oil.

[0013] In some embodiments, the oil outlet pipe is also connected to a feedstock oil cooler, which is located in front of the oil tank along the flow path of the crude oil and is used to perform secondary cooling of the crude oil.

[0014] In the technical solution, a raw material oil cooler is installed to cool the crude oil flowing into the oil tank a second time, so as to avoid the crude oil temperature from being too high and causing safety hazards.

[0015] In some embodiments, the interior of the feedstock oil cooler is used for the flow of crude oil, the exterior of the feedstock oil cooler is used for the flow of cooling water, the feedstock oil cooler is connected to a cooling water circulation pipeline, the cooling water circulation pipeline is used to supply cooling water to the feedstock oil cooler and recover the cooling water after heat exchange; a first regulating valve is provided on the cooling water circulation pipeline to control the opening degree of the cooling water circulation pipeline.

[0016] In some embodiments, a second temperature sensor is provided on the connecting pipeline between the crude oil cooler and the oil tank to detect the temperature of the crude oil flowing into the oil tank; The carbon black waste heat recovery device also includes a controller, which is connected to a second temperature sensor and a first regulating valve respectively; the controller controls the operation of the first regulating valve according to the detection information of the second temperature sensor.

[0017] In some embodiments, the feedstock oil heater is also connected to a carbon black reactor, which is arranged in parallel with the heat exchanger; part of the crude oil flowing out of the feedstock oil heater flows into the carbon black reactor and the other part flows into the heat exchanger.

[0018] In some embodiments, a second regulating valve is provided on the oil inlet pipe, which is used to regulate the flow rate of crude oil flowing into the heat exchanger; the second regulating valve is located behind the carbon black reactor along the flow path of the crude oil.

[0019] In some embodiments, a third temperature sensor is provided on the connecting pipeline between the carbon black reactor and the feed oil heater to display the temperature of the crude oil entering the carbon black reactor.

[0020] Based on the above technical solution, the carbon black waste heat recovery device in this utility model embodiment can transfer the heat carried in crude oil to the boiler feedwater through a heat exchanger, thereby achieving heat recovery while cooling the crude oil. This not only ensures the safety and reliability of the crude oil flowing back to the oil tank, but also enables full utilization of heat. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of one embodiment of the carbon black waste heat recovery device of this utility model.

[0022] In the picture: 1. Reaction shell; 2. Heat exchanger; 3. Waste heat boiler drum; 4. Boiler feed water pump; 5. Bypass pipeline; 6. Oil tank; 7. Raw oil cooler; 8. Raw oil heater; 9. Carbon black reactor; 10. Deaerator; 11. Safety valve; 21. Second regulating valve; 201. Oil inlet pipe; 202. Oil outlet pipe; 51. Bypass valve; 61. Second temperature sensor; 71. First regulating valve; 72. First temperature sensor; 91. Third temperature sensor. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] As attached Figure 1As shown in an illustrative embodiment of the carbon black waste heat recovery device of this utility model, the carbon black waste heat recovery device includes a reaction shell 1, a heat exchanger 2, and a waste heat boiler drum 3; the reaction shell 1 contains boiler feedwater; the heat exchanger 2 is located inside the reaction shell 1 and is used for heat exchange with the boiler feedwater; the heat exchanger 2 is connected to an oil inlet pipe 201 and an oil outlet pipe 202; the oil inlet pipe 201 is connected to a raw material oil heater 8, which is located outside the reaction shell 1 and is used to heat crude oil; the oil outlet pipe 202 is connected to... An oil tank 6 is connected to the outside of the reaction shell 1 and is used to recover and store crude oil. The waste heat boiler drum 3 is connected to the outlet of the reaction shell 1 and is used to hold the boiler feedwater after heat exchange with the heat exchanger 2. The waste heat boiler drum 3 is located outside the reaction shell 1. The crude oil is heated by the raw material oil heater 8 and flows into the heat exchanger 2 through the oil inlet pipe 201. After heat exchange with the boiler feedwater through the heat exchanger 2, it flows into the oil tank 6 through the oil outlet pipe 202. The boiler feedwater is heated and flows into the waste heat boiler drum 3.

[0028] The aforementioned carbon black waste heat recovery device places the heat exchanger 2 inside the reaction shell 1, and stores boiler feedwater at a lower temperature inside the reaction shell 1. The crude oil exchanges heat with the boiler feedwater through the heat exchanger 2 before flowing into the oil tank 6. The boiler feedwater is used to cool the crude oil to prevent the crude oil from being too hot when it flows into the oil tank 6, which could lead to safety hazards. At the same time, the crude oil also heats the boiler feedwater through the heat exchanger 2, transferring the heat carried in the crude oil to the boiler feedwater, thus recovering and utilizing the heat.

[0029] In some embodiments, heat exchanger 2 is a coil heat exchanger.

[0030] It should be noted that the temperature of the boiler feedwater flowing out of the reaction vessel 1 is higher than that of the boiler feedwater flowing into the reaction vessel 1. This is because the boiler feedwater flowing out of the reaction vessel 1 exchanges heat with the heat exchanger 2, and the boiler feedwater flowing out of the reaction vessel 1 absorbs part of the heat of the crude oil flowing through the heat exchanger 2.

[0031] like Figure 1 As shown, the reaction chamber 1 is equipped with a safety valve 11, which is used to prevent the pressure inside the reaction chamber 1 from becoming too high. When the pressure inside the reaction chamber 1 becomes too high, the safety valve 11 is opened to allow some gas to leave the reaction chamber 1, thereby reducing the gas pressure inside the reaction chamber 1.

[0032] In some embodiments, two safety valves 11 are provided.

[0033] like Figure 1As shown, the aforementioned carbon black waste heat recovery device also includes a boiler feedwater pump 4, which is connected to the inlet of the reaction shell 1 and is used to supply boiler feedwater to the reaction shell 1. The boiler feedwater pump 4 drives the flow of boiler feedwater, thereby increasing the heat exchange efficiency of the heat exchanger 2; after the boiler feedwater is driven by the boiler feedwater pump 4 to flow into the reaction shell 1 and exchange heat with the heat exchanger 2, it flows into the waste heat boiler drum 3, thus realizing the flow of boiler feedwater.

[0034] In some embodiments, the outlet of the boiler feed pump 4 is connected to the inlet of the reaction shell 1, and a deaerator 10 is connected to the inlet of the boiler feed pump 4. The deaerator 10 is used to remove oxygen carried in the water flowing into the boiler feed pump 4.

[0035] like Figure 1 As shown, the oil outlet pipe 202 is also connected to a raw oil cooler 7. The raw oil cooler 7 is located in front of the oil tank 6 along the flow path of the crude oil and is used to perform secondary cooling of the crude oil to increase the cooling effect of the crude oil and prevent the crude oil from flowing into the oil tank 6 at too high a temperature, which could lead to safety hazards.

[0036] In some embodiments, crude oil flows through the interior of the feedstock oil cooler 7, and cooling water flows through the exterior of the feedstock oil cooler 7, with the cooling water cooling the crude oil through the feedstock oil cooler 7.

[0037] The crude oil cooler 7 is connected to a cooling water circulation pipeline, which is used to supply cooling water to the crude oil cooler 7 and recover the cooling water after heat exchange. A first regulating valve 71 is connected to the cooling water circulation pipeline to control the opening of the cooling water circulation pipeline, thereby controlling the flow rate of the cooling water and thus controlling the cooling effect of the crude oil cooler 7 on the crude oil. This avoids overcooling and waste of water resources, and also avoids poor cooling effect that could lead to excessively high temperature of the crude oil flowing into the oil tank 6, which could cause safety hazards.

[0038] The aforementioned carbon black waste heat recovery device also includes a controller, which is connected to the first regulating valve 71 and is used to control the opening degree of the first regulating valve 71.

[0039] In some embodiments, a second temperature sensor 61 is provided on the connecting pipeline between the crude oil cooler 7 and the oil tank 6 to detect the temperature of the crude oil flowing into the oil tank 6.

[0040] The second temperature sensor 61 is connected to the controller, and the controller controls the opening degree of the first regulating valve 71 based on the detection information of the second temperature sensor 61.

[0041] When the second temperature sensor 61 detects that the crude oil temperature is greater than the first set value, it indicates that the crude oil flowing into the oil tank 6 is at a high temperature and it is necessary to increase the secondary cooling effect of the crude oil cooler 7. The controller controls the first regulating valve 71 to increase the opening degree so that the cooling water can fully contact the crude oil cooler 7 to fully cool the crude oil flowing through the crude oil cooler 7.

[0042] When the second temperature sensor 61 detects that the crude oil temperature is lower than the second set value, it indicates that the crude oil temperature flowing into the oil tank 6 is low. Considering the need to save cooling costs, the secondary cooling effect of the raw material oil cooler 7 on the crude oil can be reduced. The controller controls the first regulating valve 71 to reduce the opening and reduce the flow rate of cooling water, thereby reducing the cooling effect of the cooling water on the crude oil flowing through the raw material oil cooler 7.

[0043] like Figure 1 As shown, the carbon black waste heat recovery device also includes a bypass pipe 5, with its two ends connected to the oil inlet pipe 201 and the oil outlet pipe 202 respectively; the bypass pipe 5 is located outside the reaction shell 1; so that crude oil can flow directly into the oil tank 6 through the bypass pipe 5 without passing through the heat exchanger 2.

[0044] A bypass valve 51 is provided on the bypass pipeline 5. The bypass valve 51 is used to control the opening degree of the bypass pipeline 5. When the temperature of the crude oil flowing out of the raw material oil heater 8 is not high, it can flow directly into the oil tank 6 through the bypass pipeline 5 without passing through the heat exchanger 2 for heat exchange.

[0045] In some embodiments, a first temperature sensor 72 is provided on the oil outlet pipe 202. The first temperature sensor 72 is located behind the connection between the bypass pipe 5 and the oil outlet pipe 202 along the flow path of the crude oil, and the first temperature sensor 72 is located in front of the feedstock oil cooler 7. The first temperature sensor 72 is used to detect the temperature of the crude oil entering the feedstock oil cooler 7.

[0046] The controller is connected to the first temperature sensor 72; the controller controls the opening degree of the bypass valve 51 according to the detection information of the first temperature sensor 72.

[0047] When the first temperature sensor 72 detects that the crude oil temperature is greater than the third set value, it indicates that the crude oil temperature flowing into the oil tank 6 is high and it is necessary to increase the cooling effect of the boiler feedwater on the crude oil. The controller controls the bypass valve 51 to increase the opening degree, so that more crude oil flows through the heat exchanger 2, so that the boiler feedwater can fully cool the crude oil flowing through the raw material oil cooler 7, and at the same time, it can more fully recover the heat of the crude oil.

[0048] When the first temperature sensor 72 detects that the crude oil temperature is lower than the fourth set value, it indicates that the crude oil temperature flowing into the oil tank 6 is low and there is no excess heat in the crude oil that can be recovered. The controller controls the bypass valve 51 to reduce the opening, thereby reducing the amount of crude oil flowing into the heat exchanger 2 and allowing more crude oil to flow into the oil tank 6 through the bypass pipe 5, thus reducing the cooling effect of the boiler feedwater on the crude oil flowing through the heat exchanger 2.

[0049] It should be noted that in winter, the opening of the bypass valve 51 can be increased to make the temperature of the crude oil flowing into the oil tank 6 higher, thereby allowing the temperature of the crude oil in the oil tank 6 to rise rapidly, thus increasing the production efficiency of carbon black.

[0050] like Figure 1 As shown, the crude oil heater 8 is connected to a carbon black reactor 9, which is arranged in parallel with the heat exchanger 2. The carbon black reactor 9 is used to chemically react crude oil to produce carbon black. The carbon black flue gas generated during the carbon black production process in the carbon black reactor 9 carries heat. The carbon black flue gas heats the crude oil heater 8 to preheat the crude oil, thereby increasing the carbon black production efficiency.

[0051] The crude oil flowing out of the feedstock oil heater 8 flows partly into the carbon black reactor 9 to generate carbon black, and partly into the oil tank 6 for storage. Since the crude oil in the feedstock oil heater has heat, if the crude oil flows directly into the oil tank 6, it will cause the temperature inside the oil tank 6 to be too high and create a safety hazard. Therefore, it is necessary to cool down the crude oil flowing into the oil tank 6.

[0052] It should be noted that crude oil is usually coal tar.

[0053] In some embodiments, a second regulating valve 21 is provided on the oil inlet pipe 201. The second regulating valve 21 is used to regulate the flow rate of crude oil flowing into the heat exchanger 2. The second regulating valve 21 is located behind the carbon black reactor 9 along the flow path of the crude oil.

[0054] It should be noted that if more crude oil enters the heat exchanger 2, the amount of crude oil entering the carbon black reactor 9 will decrease; the larger the opening of the second regulating valve 21, the more crude oil enters the heat exchanger 2, the less crude oil enters the carbon black reactor 9, and the lower the temperature of the crude oil entering the carbon black reactor 9.

[0055] In some embodiments, a third temperature sensor 91 is provided on the connecting pipeline between the carbon black reactor 9 and the raw material oil heater 8 to display the temperature of the crude oil entering the carbon black reactor 9.

[0056] The third temperature sensor 91 is connected to the controller, and the controller controls the opening degree of the second regulating valve 21 based on the detection information of the third temperature sensor 91.

[0057] When the third temperature sensor 91 detects that the crude oil temperature is greater than the fifth set value, it indicates that the crude oil temperature flowing into the carbon black reactor 9 is too high and it is necessary to reduce the temperature of the crude oil flowing into the carbon black reactor 9. The controller controls the second regulating valve 21 to increase the opening, so that more crude oil flows through the heat exchanger 2, reducing the flow rate of crude oil into the carbon black reactor 9, thereby reducing the temperature of the crude oil flowing into the carbon black reactor 9.

[0058] When the third temperature sensor 91 detects that the crude oil temperature is lower than the fourth set value, it indicates that the crude oil temperature flowing into the carbon black reactor 9 is low and the temperature of the crude oil flowing into the carbon black reactor 9 needs to be increased. The controller controls the second regulating valve 21 to reduce the opening, reduce the amount of crude oil flowing into the heat exchanger 2, and allow more crude oil to flow into the carbon black reactor 9, thereby increasing the temperature of the crude oil flowing into the carbon black reactor 9.

[0059] Through the description of several embodiments of the carbon black waste heat recovery device of this utility model, it can be seen that the embodiments of the carbon black waste heat recovery device of this utility model have at least one or more of the following advantages: 1. By placing the heat exchanger 2 inside the reaction shell 1 and storing the boiler feedwater at a lower temperature inside the reaction shell 1, the crude oil exchanges heat with the boiler feedwater through the heat exchanger 2 before flowing into the oil tank 6. The boiler feedwater is used to cool the crude oil to prevent the crude oil from being too hot when it flows into the oil tank 6, which could lead to safety hazards. At the same time, the crude oil heats the boiler feedwater through the heat exchanger 2, transferring the heat carried in the crude oil to the boiler feedwater, thus recovering and utilizing the heat.

[0060] 2. A raw material oil cooler 7 is installed to perform secondary cooling on the crude oil flowing into the oil tank 6, thereby increasing the cooling effect of the carbon black waste heat recovery device on the crude oil and preventing the crude oil flowing into the oil tank 6 from being too hot and causing safety hazards.

[0061] 3. By setting up a bypass pipeline 5, when the temperature of the crude oil flowing out of the raw material oil heater 8 is low, the crude oil can flow directly into the oil tank 6 without passing through the heat exchanger 2, thus avoiding the situation where the crude oil is cooled by the boiler feedwater when the temperature is not high, which not only fails to recover heat but also increases cooling costs.

[0062] 4. By installing valves in the pipeline and temperature sensors at corresponding locations on the pipeline, the controller controls the valve opening based on the detection information from the corresponding temperature sensors, thereby achieving automatic cooling and heat recovery of crude oil. This ensures stable production indicators, saves on circulating water consumption, reduces indicator fluctuations caused by manual oil temperature control, and lowers the labor intensity of employees. It not only ensures the safety and reliability of crude oil flowing back to oil tank 6, but also achieves full utilization of heat and saves on cooling costs.

[0063] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0064] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A carbon black waste heat recovery device, characterized in that, include: A reaction vessel containing boiler feedwater; A heat exchanger is located inside the reaction shell and is used for heat exchange with boiler feedwater; the heat exchanger is connected to an oil inlet pipe and an oil outlet pipe; the oil inlet pipe is connected to a raw oil heater; the raw oil heater is located outside the reaction shell and is used to heat crude oil; the oil outlet pipe is connected to an oil tank, which is located outside the reaction shell and is used to recover and store crude oil. The waste heat boiler steam drum is connected to the outlet of the reaction shell and is used to hold the boiler feedwater after heat exchange with the heat exchanger; the waste heat boiler steam drum is located outside the reaction shell. The crude oil is heated by the feedstock heater, flows into the heat exchanger through the inlet pipe, exchanges heat with the boiler feedwater through the heat exchanger, and then flows into the oil tank through the outlet pipe.

2. The carbon black waste heat recovery device according to claim 1, characterized in that, It also includes a boiler feedwater pump, which is connected to the inlet of the reaction tank and is used to supply boiler feedwater to the reaction tank.

3. The carbon black waste heat recovery device according to claim 1, characterized in that, It also includes a bypass pipeline, the two ends of which are connected to the oil inlet pipe and the oil outlet pipe respectively; the bypass pipeline is located outside the reaction shell; the bypass pipeline is equipped with a bypass valve, which is used to control the opening degree of the bypass pipeline.

4. The carbon black waste heat recovery device according to claim 3, characterized in that, The oil outlet pipe is equipped with a first temperature sensor, which is located behind the connection between the bypass pipe and the oil outlet pipe along the crude oil flow path.

5. The carbon black waste heat recovery device according to claim 1, characterized in that, The oil outlet pipe is also connected to a feedstock oil cooler, which is located in front of the oil tank along the flow path of the crude oil and is used to perform secondary cooling of the crude oil.

6. The carbon black waste heat recovery device according to claim 5, characterized in that, The interior of the crude oil cooler is used for crude oil to flow through, and cooling water flows through the exterior of the crude oil cooler. The crude oil cooler is connected to a cooling water circulation pipeline, which is used to supply cooling water to the crude oil cooler and recover the cooling water after heat exchange. A first regulating valve is connected to the cooling water circulation pipeline, which is used to control the opening degree of the cooling water circulation pipeline.

7. The carbon black waste heat recovery device according to claim 6, characterized in that, A second temperature sensor is installed on the connecting pipeline between the raw oil cooler and the oil tank to detect the temperature of the crude oil flowing into the oil tank; The carbon black waste heat recovery device also includes a controller, which is connected to the second temperature sensor and the first regulating valve respectively; the controller controls the first regulating valve to operate according to the detection information of the second temperature sensor.

8. The carbon black waste heat recovery device according to claim 1, characterized in that, The feedstock oil heater is also connected to a carbon black reactor, which is arranged in parallel with the heat exchanger; part of the crude oil flowing out of the feedstock oil heater flows into the carbon black reactor, and the other part flows into the heat exchanger.

9. The carbon black waste heat recovery device according to claim 8, characterized in that, A second regulating valve is provided on the oil inlet pipe. The second regulating valve is used to regulate the flow rate of crude oil flowing into the heat exchanger. In the flow path of the crude oil, the second regulating valve is located behind the carbon black reactor.

10. The carbon black waste heat recovery device according to claim 8, characterized in that, A third temperature sensor is installed on the connecting pipeline between the carbon black reactor and the raw oil heater to display the temperature of the crude oil entering the carbon black reactor.

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