Oil-rich coal high-temperature pyrolysis and waste heat utilization device

Abstract

The utility model relates to a kind of high-temperature pyrolysis and waste heat utilization device of oil-rich coal, mainly by medium-temperature pyrolysis furnace, high-temperature pyrolysis furnace, bucket elevator, thermal oxidation chamber, heat pipe heat exchange device, flue gas purifier is constituted, and the both ends of medium-temperature pyrolysis furnace are equipped with medium-temperature pyrolysis furnace feeder and medium-temperature pyrolysis furnace discharger, through the comprehensive design of energy supply and waste heat utilization in whole process, including high-temperature oil gas waste heat utilization, non-condensable gas combustion flue gas waste heat utilization, hot flue gas auxiliary heating pyrolysis furnace, realize waste heat cascade utilization, solve the problem of energy waste.Using medium-temperature pyrolysis furnace flue gas waste heat preheating air into thermal oxidation chamber, significantly reduce the fuel consumption of thermal oxidation chamber;High-temperature flue gas of high-temperature pyrolysis furnace is passed into medium-temperature pyrolysis furnace as preheating energy, realize the effective recovery of high-temperature waste heat;Non-condensable gas produced by pyrolysis is used as fuel for thermal oxidation chamber, realize waste heat utilization.These measures form efficient heat cycle, improve energy self-sufficiency rate, reduce operating cost.

Description

Technical Field

[0001] This utility model relates to the field of environmental protection technology, specifically to a device for high-temperature pyrolysis and waste heat utilization of oil-rich coal. Background Technology

[0002] Oil-rich coal, as an important energy resource, has always been a focus of research in the field of energy conversion and utilization due to its high-temperature pyrolysis technology. Currently, high-temperature pyrolysis technology for oil-rich coal aims to convert the organic matter in coal into gaseous, liquid, and solid products under high-temperature conditions to achieve efficient coal utilization. However, in terms of oil and gas product recovery, traditional technologies mostly employ wet recovery methods using spray towers, which suffer from problems such as high water consumption and secondary pollution. Therefore, dry oil and gas recovery technology is gradually becoming a new research direction. Although some progress has been made in high-temperature pyrolysis of oil-rich coal and dry oil and gas recovery technologies, many shortcomings and challenges still exist.

[0003] 1. Existing technologies fail to fully utilize the waste heat generated during pyrolysis, resulting in energy waste. The system's energy self-sufficiency is insufficient, requiring external energy input and increasing operating costs.

[0004] 2. Traditional wet oil and gas recovery technologies consume large amounts of water, while existing dry recovery technologies, although reducing water consumption, still do not completely achieve the goal of requiring no or minimal water use. Furthermore, wet oil and gas scrubbing requires complex treatment and purification of oil and water, which can easily cause secondary pollution.

[0005] 3. Dust generated during the high-temperature pyrolysis of oil-rich coal can easily cause blockages in the equipment, affecting the stable operation of the system, leading to frequent equipment maintenance and reduced production efficiency. Utility Model Content

[0006] The purpose of this invention is to overcome the aforementioned shortcomings and provide a high-temperature pyrolysis and waste heat utilization device for oil-rich coal. Through a comprehensive design of energy supply and waste heat utilization throughout the entire process, including the utilization of waste heat from high-temperature oil and gas, the utilization of waste heat from non-condensable gas combustion flue gas, and the auxiliary heating of the pyrolysis furnace with hot flue gas, it achieves cascaded utilization of waste heat and solves the problem of energy waste. The waste heat from the flue gas in the medium-temperature pyrolysis furnace is used to preheat the air entering the thermal oxidation chamber, significantly reducing fuel consumption in the thermal oxidation chamber. High-temperature flue gas from the high-temperature pyrolysis furnace is passed into the medium-temperature pyrolysis furnace as preheating energy, achieving effective recovery of high-temperature waste heat. The non-condensable gas produced by pyrolysis is reused as fuel in the thermal oxidation chamber, achieving waste heat utilization. These measures form a highly efficient thermal cycle, improving energy self-sufficiency and reducing operating costs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature pyrolysis and waste heat utilization device for oil-rich coal, mainly composed of a medium-temperature pyrolysis furnace, a high-temperature pyrolysis furnace, a bucket elevator, a thermal oxidation chamber, a heat pipe heat exchange device, and a flue gas purifier, characterized in that: the two ends of the medium-temperature pyrolysis furnace are provided with a medium-temperature pyrolysis furnace feeder and a medium-temperature pyrolysis furnace discharger, the two ends of the high-temperature pyrolysis furnace are provided with a high-temperature pyrolysis furnace feeder and a high-temperature pyrolysis furnace discharger, and the medium-temperature pyrolysis furnace discharger is also connected to the high-temperature pyrolysis furnace feeder through a pipeline;

[0008] The outer shell of the medium-temperature pyrolysis furnace is provided with a medium-temperature flue gas inlet at one end near the feeder, and a medium-temperature flue gas outlet at one end near the discharger.

[0009] The high-temperature pyrolysis furnace shell has a high-temperature flue gas inlet at one end near the feeder and a flue gas outlet at one end near the discharger. The flue gas outlet is connected to the medium-temperature flue gas inlet through a flue gas pipe.

[0010] The heat pipe heat exchange device includes a high-temperature air preheater and a medium-temperature oil-gas condenser. The high-temperature air preheater uses a heat pipe heat exchanger, with the upper header being the air side of the high-temperature air preheater and the lower header being the flue gas side of the high-temperature air preheater. The medium-temperature oil-gas condenser uses a heat pipe heat exchanger, with the upper header being the air side of the medium-temperature oil-gas condenser and the lower header being the oil-gas side of the medium-temperature oil-gas condenser.

[0011] The medium-temperature flue gas outlet is connected to the inlet of the flue gas side of the high-temperature air preheater through a hot flue gas pipeline, and the outlet of the flue gas side of the high-temperature air preheater is connected to the flue gas purifier through a flue gas purification pipeline.

[0012] The high-temperature air inlet is connected to the high-temperature flue gas outlet of the thermal oxidation chamber through a high-temperature flue gas pipe. The thermal oxidation chamber is connected to the gas inlet through a pipe. The thermal oxidation chamber is equipped with a non-condensable gas inlet and a hot air inlet. The hot air inlet is connected to the outlet on the air side of the high-temperature air preheater through a high-temperature air pipe.

[0013] The air-side inlet of the medium-temperature oil-gas condenser is connected to a blower via a pipe, and the air-side outlet of the medium-temperature oil-gas condenser is connected to the air-side inlet of the high-temperature air preheater via a pipe.

[0014] The outlet on the oil / gas side of the medium-temperature oil / gas condenser is connected to the non-condensable gas inlet via a non-condensable gas pipeline.

[0015] Furthermore, the medium-temperature pyrolysis furnace discharge device includes a medium-temperature pyrolysis furnace discharge port, a first baffle wall, and a first riser pipe, and the medium-temperature pyrolysis furnace discharge port is connected to the first baffle wall and the first riser pipe respectively.

[0016] The high-temperature pyrolysis furnace discharge device includes a medium-temperature pyrolysis furnace discharge port, a second baffle wall, and a second riser pipe. The medium-temperature pyrolysis furnace discharge port is connected to the second baffle wall and the second riser pipe, respectively.

[0017] Furthermore, the outlet of the first riser pipe is connected to the inlet of the first cyclone dust collector via a pipe, and the outlet of the first cyclone dust collector is connected to the inlet of the oil and gas side of the medium-temperature oil and gas condenser via a pipe; the outlet of the second riser pipe is connected to the inlet of the second cyclone dust collector via a pipe, and the outlet of the second cyclone dust collector is connected to the inlet of the oil and gas side of the medium-temperature oil and gas condenser via a pipe.

[0018] Furthermore, the flue gas purification duct is equipped with an induced draft fan.

[0019] Furthermore, the oil outlet on the oil-gas side of the medium-temperature oil-gas condenser is connected to an oil recovery device.

[0020] Furthermore, the discharge port of the bucket elevator is connected to the inlet of the feeder of the medium-temperature pyrolysis furnace.

[0021] The beneficial effects of this utility model are:

[0022] (1) Through the comprehensive design of energy supply and waste heat utilization throughout the entire process, including the utilization of waste heat from high-temperature oil and gas, the utilization of waste heat from non-condensable gas combustion flue gas, and the auxiliary heating of the pyrolysis furnace with hot flue gas, the waste heat is utilized in stages, solving the problem of energy waste. The waste heat from the flue gas in the medium-temperature pyrolysis furnace is used to preheat the air entering the thermal oxidation chamber, significantly reducing fuel consumption in the thermal oxidation chamber; high-temperature flue gas from the high-temperature pyrolysis furnace is introduced into the medium-temperature pyrolysis furnace as preheating energy, achieving effective recovery of high-temperature waste heat; and non-condensable gas generated from pyrolysis is used as fuel in the thermal oxidation chamber, achieving waste heat utilization. These measures form an efficient thermal cycle, improving energy self-sufficiency and reducing operating costs.

[0023] (2) A full-process dry oil and gas recovery technology is adopted, the core of which is an oil and gas condenser using ambient air as the cooling medium. This completely eliminates traditional water cooling or spraying, thus eliminating water consumption. The condenser ensures that water vapor in the oil and gas does not condense, producing high-quality oil products that are essentially water-free, eliminating the need for oil-water separation devices and eradicating the risk of oily wastewater discharge and secondary pollution. The condensation process also retains more low-boiling-point, high-calorific-value components, and the non-condensable gas is directly introduced into the thermal oxidation chamber as stable fuel for combustion, both treating waste gas and supplementing energy. This achieves efficient and environmentally friendly dry recovery.

[0024] (3) By using the first and second cyclone dust collectors in front of the oil-gas condenser, solid dust can be removed before the pyrolysis oil-gas enters the oil-gas condenser; the high-temperature flue gas emitted from the pyrolysis furnace is blocked by the baffle wall to intercept some of the dust in the pyrolysis-generated oil-gas, which significantly reduces the blockage of the oil-gas condenser caused by dust deposition and tar condensation, reduces the number of maintenance times, and improves the stability and production efficiency of the system operation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model.

[0026] Figure 2 This is a schematic diagram of the dustproof structure of the discharge device of a medium-temperature pyrolysis furnace.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Medium-temperature pyrolysis furnace; 11. Medium-temperature pyrolysis furnace feeder; 12. Medium-temperature pyrolysis furnace discharger; 13. Medium-temperature flue gas inlet; 14. Medium-temperature flue gas outlet; 15. Medium-temperature pyrolysis furnace discharge port; 16. First baffle wall; 17. First riser pipe; 18. First cyclone dust collector;

[0029] 2. High-temperature pyrolysis furnace; 21. High-temperature pyrolysis furnace feeder; 22. High-temperature pyrolysis furnace discharger; 23. High-temperature flue gas inlet; 24. Flue gas outlet; 25. High-temperature pyrolysis furnace discharge port; 26. Second baffle wall; 27. Second riser pipe; 28. Second cyclone dust collector;

[0030] 3. Bucket elevator;

[0031] 4. Thermal oxidation chamber; 41. Hot air inlet; 42. Gas inlet; 43. Non-condensable gas inlet; 44. High-temperature flue gas outlet; 45. High-temperature air duct; 46. Flue gas duct; 47. Oil recovery device;

[0032] 5. Heat pipe heat exchanger; 51. High-temperature air preheater; 52. Medium-temperature oil-gas condenser; 511. Air side of high-temperature air preheater; 512. Flue gas side of high-temperature air preheater; 521. Air side of medium-temperature oil-gas condenser; 522. Oil-gas side of medium-temperature oil-gas condenser; 53. Blower; 54. Exhaust fan;

[0033] 6. Flue gas purifier; 7. Flue gas purification duct; 8. Hot flue gas duct; 9. Non-condensable gas duct; 10. High-temperature flue gas duct. Detailed Implementation

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] like Figure 1-2As shown: This utility model is a high-temperature pyrolysis and waste heat utilization device for oil-rich coal, mainly composed of a medium-temperature pyrolysis furnace 1, a high-temperature pyrolysis furnace 2, a bucket elevator 3, a thermal oxidation chamber 4, a heat pipe heat exchange device 5, and a flue gas purifier 6. Its features are: the two ends of the medium-temperature pyrolysis furnace 1 are provided with a medium-temperature pyrolysis furnace feeder 11 and a medium-temperature pyrolysis furnace discharger 12, and the two ends of the high-temperature pyrolysis furnace 2 are provided with a high-temperature pyrolysis furnace feeder 21 and a high-temperature pyrolysis furnace discharger 22. The medium-temperature pyrolysis furnace discharger 12 is also connected to the high-temperature pyrolysis furnace feeder 21 through a pipeline, so that the material can directly enter the high-temperature pyrolysis stage after medium-temperature pre-pyrolysis.

[0036] The outer shell of the medium-temperature pyrolysis furnace 1 is provided with a medium-temperature flue gas inlet 13 at one end near the feeder, and the outer shell of the medium-temperature pyrolysis furnace 1 is provided with a medium-temperature flue gas outlet 14 at one end near the discharger.

[0037] The high-temperature pyrolysis furnace 2 has a high-temperature flue gas inlet 23 at one end of the outer shell near the feeder, and a flue gas outlet 24 at one end of the outer shell near the discharger. The flue gas outlet 24 is connected to the medium-temperature flue gas inlet 13 through a flue gas pipe 46.

[0038] The heat pipe heat exchange device 5 includes a high-temperature air preheater 51 and a medium-temperature oil-gas condenser 52. The high-temperature air preheater 51 adopts a heat pipe heat exchanger, with the upper header being the air side 511 of the high-temperature air preheater and the lower header being the flue gas side 512 of the high-temperature air preheater. The medium-temperature oil-gas condenser 52 adopts a heat pipe heat exchanger, with the upper header being the air side 521 of the medium-temperature oil-gas condenser and the lower header being the oil-gas side 522 of the medium-temperature oil-gas condenser.

[0039] The medium-temperature flue gas outlet 14 is connected to the inlet of the flue gas side 512 of the high-temperature air preheater through the hot flue gas pipe 8, and the outlet of the flue gas side 512 of the high-temperature air preheater is connected to the flue gas purifier 6 through the flue gas purification pipe 7.

[0040] The high-temperature air inlet 23 is connected to the high-temperature flue gas outlet 44 of the thermal oxidation chamber 4 through the high-temperature flue gas pipe 10. The thermal oxidation chamber 4 is connected to the gas inlet 42 through a pipe. The thermal oxidation chamber 4 is provided with a non-condensable gas inlet 43 and a hot air inlet 41. The hot air inlet 41 is connected to the outlet of the air side 511 of the high-temperature air preheater through the high-temperature air pipe 45.

[0041] The inlet of the air side 521 of the medium-temperature oil-gas condenser is connected to the blower 53 through a pipe, and the outlet of the air side 521 of the medium-temperature oil-gas condenser is connected to the inlet of the air side 511 of the high-temperature air preheater through a pipe.

[0042] The outlet of the medium-temperature oil-gas condenser on the oil-gas side 522 is connected to the non-condensable gas inlet 43 via the non-condensable gas pipeline 9.

[0043] Furthermore, the medium-temperature pyrolysis furnace discharge device 12 includes a medium-temperature pyrolysis furnace discharge port 15, a first baffle wall 16, and a first riser pipe 17, and the medium-temperature pyrolysis furnace discharge port 15 is connected to the first baffle wall 16 and the first riser pipe 17 respectively.

[0044] The high-temperature pyrolysis furnace discharge device 22 includes a medium-temperature pyrolysis furnace discharge port 25, a second baffle wall 26, and a second riser pipe 27. The medium-temperature pyrolysis furnace discharge port 25 is connected to the second baffle wall 26 and the second riser pipe 27 respectively.

[0045] Furthermore, the outlet of the first riser pipe 17 is connected to the inlet of the first cyclone dust collector 18 via a pipe, and the outlet of the first cyclone dust collector 18 is connected to the inlet of the oil-gas side 522 of the medium-temperature oil-gas condenser via a pipe; the outlet of the second riser pipe 27 is connected to the inlet of the second cyclone dust collector 28 via a pipe, and the outlet of the second cyclone dust collector 28 is connected to the inlet of the oil-gas side 522 of the medium-temperature oil-gas condenser via a pipe.

[0046] Furthermore, an induced draft fan 54 is provided on the flue gas duct 7.

[0047] Furthermore, the oil outlet of the medium-temperature oil-gas condenser 522 on the oil-gas side is connected to the oil recovery device 17.

[0048] Furthermore, the discharge port of the bucket elevator 3 is connected to the inlet of the feeder 11 of the medium-temperature pyrolysis furnace.

[0049] The medium-temperature oil-gas condenser 52 uses ambient temperature air as the cooling medium. During the condensation process, the outlet temperature of the condensed oil-gas is controlled at approximately 200℃ to ensure that the water vapor contained in the pyrolysis oil-gas does not condense, resulting in a very low water content in the condensed oil. Simultaneously, due to the medium-temperature condensation, the non-condensable gas contains a higher proportion of low-boiling-point gas components, resulting in a higher calorific value than conventional water condensation, facilitating subsequent stable thermal combustion. Air-cooled condensation requires no water, produces no wastewater discharge, and is not limited by geographical location or season.

[0050] The high-temperature air preheater 51 and the medium-temperature oil-gas condenser 52 are heat pipe heat exchangers, with their inlets and outlets connected to each other in the designed sequence. The air side of the heat pipe heat exchanger uses finned heat pipes to enhance heat transfer, while the oil-gas and flue gas sides use smooth heat pipes, which are less prone to blockage.

[0051] The high-temperature air preheater 51 reduces the temperature of the hot flue gas from about 600°C to about 280°C, while simultaneously raising the air temperature at the outlet of the medium-temperature oil-gas condenser 52 from about 150°C to about 400°C, and then the air enters the thermal oxidation chamber 4 to provide the combustion air source.

[0052] The medium-temperature oil-gas condenser 52 reduces the oil-gas temperature at the outlet of the pyrolysis furnace from about 500°C to about 200°C, while simultaneously raising the air temperature at the outlet of the blower 53 from about 20°C to about 150°C, and then the air enters the air side 511 of the high-temperature air preheater.

[0053] The working process of this utility model:

[0054] Raw material and solid slag process:

[0055] The raw material is fed into the medium-temperature pyrolysis furnace 1 via the bucket elevator 3 through the feeder 11. After preheating in the medium-temperature pyrolysis furnace 1 at a controlled temperature of 350℃, it enters the high-temperature pyrolysis furnace 2 through the discharge port of the medium-temperature pyrolysis furnace discharger 12 and the feeder 21. The high-temperature pyrolysis temperature is controlled at 600℃. Finally, the solid slag, i.e., semi-coke, is discharged through the discharge port of the high-temperature pyrolysis furnace discharger 22.

[0056] Air and flue gas flow:

[0057] Ambient temperature air enters the air side 521 of the medium-temperature oil-gas condenser via blower 53, rising from 20°C to 150°C. It then enters the air side 511 of the high-temperature air preheater, which raises the air temperature from 150°C to 400°C. The air then enters the thermal oxidation chamber 4 via high-temperature air duct 45. After heating, the high-temperature flue gas exits from high-temperature flue gas outlet 44, passes through high-temperature flue gas duct 10, and enters the high-temperature pyrolysis furnace 2 via high-temperature flue gas inlet 23, where it pyrolyzes the oil-rich coal at high temperature. The flue gas then exits from flue gas outlet 24, passes through flue gas duct 46, and enters the medium-temperature pyrolysis furnace 1, where it pyrolyzes the oil-rich coal at medium temperature. Finally, the flue gas exits from medium-temperature flue gas outlet 14, passes through hot flue gas duct 8, and enters the flue gas side 512 of the high-temperature air preheater for heat exchange. Finally, the flue gas exits from the high-temperature air preheater flue gas side 512, passes through flue gas purification duct 7, and is discharged into the flue gas purifier 6 via induced draft fan 54 for purification treatment before being discharged in compliance with emission standards.

[0058] Oil and gas process:

[0059] The oil and gas produced after pyrolysis in the medium-temperature pyrolysis furnace 1 passes through the outlet 15 of the medium-temperature pyrolysis furnace, then through the first baffle wall 16 and the first riser pipe 17, and enters the first cyclone dust collector 18 through the pipeline to remove dust from the oil and gas. Finally, it enters the oil and gas side 522 of the medium-temperature oil and gas condenser for condensation, reducing the oil and gas temperature from 500℃ to 200℃ to ensure that the water vapor in the oil and gas does not condense, thus eliminating the need for an oil-water separation device. The condensed oil flows into the oil recovery device 47, while the non-condensable gas enters the thermal oxidation chamber 4 for combustion to provide a heat source for the system.

[0060] The oil and gas produced after pyrolysis in the high-temperature pyrolysis furnace 2 pass through the high-temperature pyrolysis furnace outlet 25, then through the second baffle wall 26 and the second riser pipe 27, and enter the second cyclone dust collector 28 through the pipeline to remove dust from the oil and gas. Finally, it enters the oil and gas side 522 of the medium-temperature oil and gas condenser for condensation, reducing the oil and gas temperature from 500℃ to 200℃ to ensure that the water vapor in the oil and gas does not condense, thus eliminating the need for an oil-water separation device. The condensed oil flows into the oil recovery device 47, while the non-condensable gas enters the thermal oxidation chamber 4 for combustion to provide a heat source for the system.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0062] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A high-temperature pyrolysis and waste heat utilization device for oil-rich coal, mainly composed of a medium-temperature pyrolysis furnace (1), a high-temperature pyrolysis furnace (2), a bucket elevator (3), a thermal oxidation chamber (4), a heat pipe heat exchange device (5), and a flue gas purifier (6), characterized in that: The medium-temperature pyrolysis furnace (1) is provided with a medium-temperature pyrolysis furnace feeder (11) and a medium-temperature pyrolysis furnace discharger (12) at both ends. The high-temperature pyrolysis furnace (2) is provided with a high-temperature pyrolysis furnace feeder (21) and a high-temperature pyrolysis furnace discharger (22) at both ends. The medium-temperature pyrolysis furnace discharger (12) is also connected to the high-temperature pyrolysis furnace feeder (21) through a pipe. The outer shell of the medium-temperature pyrolysis furnace (1) is provided with a medium-temperature flue gas inlet (13) at one end near the feeder, and the outer shell of the medium-temperature pyrolysis furnace (1) is provided with a medium-temperature flue gas outlet (14) at one end near the discharger; The high-temperature pyrolysis furnace (2) has a high-temperature flue gas inlet (23) at one end of its outer shell near the feeder, and a flue gas outlet (24) at one end of its outer shell near the discharger. The flue gas outlet (24) is connected to the medium-temperature flue gas inlet (13) through a flue gas pipe (46). The heat pipe heat exchange device (5) includes a high-temperature air preheater (51) and a medium-temperature oil-gas condenser (52). The high-temperature air preheater (51) adopts a heat pipe heat exchanger. The upper header is the air side (511) of the high-temperature air preheater, and the lower header is the flue gas side (512) of the high-temperature air preheater. The medium-temperature oil-gas condenser (52) adopts a heat pipe heat exchanger. The upper header is the air side (521) of the medium-temperature oil-gas condenser, and the lower header is the oil-gas side (522) of the medium-temperature oil-gas condenser. The medium-temperature flue gas outlet (14) is connected to the inlet of the flue gas side (512) of the high-temperature air preheater through the hot flue gas pipe (8), and the outlet of the flue gas side (512) of the high-temperature air preheater is connected to the flue gas purifier (6) through the flue gas purification pipe (7). The high-temperature air inlet (23) is connected to the high-temperature flue gas outlet (44) of the thermal oxidation chamber (4) through the high-temperature flue gas pipe (10). The thermal oxidation chamber (4) is connected to the gas inlet (42) through the pipe. The thermal oxidation chamber (4) is provided with a non-condensable gas inlet (43) and a hot air inlet (41). The hot air inlet (41) is connected to the outlet of the air side (511) of the high-temperature air preheater through the high-temperature air pipe (45). The inlet of the air side (521) of the medium-temperature oil-gas condenser is connected to the blower (53) through a pipe, and the outlet of the air side (521) of the medium-temperature oil-gas condenser is connected to the inlet of the air side (511) of the high-temperature air preheater through a pipe. The outlet of the medium-temperature oil-gas condenser on the oil-gas side (522) is connected to the non-condensable gas inlet (43) through the non-condensable gas pipeline (9).

2. The high-temperature pyrolysis and waste heat utilization device for oil-rich coal according to claim 1, characterized in that: The medium-temperature pyrolysis furnace discharge device (12) includes a medium-temperature pyrolysis furnace discharge port (15), a first baffle wall (16), and a first riser pipe (17). The medium-temperature pyrolysis furnace discharge port (15) is connected to the first baffle wall (16) and the first riser pipe (17). The high-temperature pyrolysis furnace discharge device (22) includes a medium-temperature pyrolysis furnace discharge port (25), a second baffle wall (26), and a second riser pipe (27). The medium-temperature pyrolysis furnace discharge port (25) is connected to the second baffle wall (26) and the second riser pipe (27).

3. The high-temperature pyrolysis and waste heat utilization device for oil-rich coal according to claim 2, characterized in that: The outlet of the first riser (17) is connected to the inlet of the first cyclone dust collector (18) through a pipe, and the outlet of the first cyclone dust collector (18) is connected to the inlet of the oil and gas side (522) of the medium-temperature oil and gas condenser through a pipe; the outlet of the second riser (27) is connected to the inlet of the second cyclone dust collector (28) through a pipe, and the outlet of the second cyclone dust collector (28) is connected to the inlet of the oil and gas side (522) of the medium-temperature oil and gas condenser through a pipe.

4. The high-temperature pyrolysis and waste heat utilization device for oil-rich coal according to claim 1, characterized in that: The flue gas purification duct (7) is equipped with an induced draft fan (54).

5. The high-temperature pyrolysis and waste heat utilization device for oil-rich coal according to claim 1, characterized in that: The oil outlet of the medium-temperature oil-gas condenser (522) is connected to an oil recovery device (47).

6. The high-temperature pyrolysis and waste heat utilization device for oil-rich coal according to claim 1, characterized in that: The discharge port of the bucket elevator (3) is connected to the inlet of the feeder (11) of the medium-temperature pyrolysis furnace.

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