Biomass tar deep removal equipment and method

Abstract

The invention provides biomass tar deep removal equipment which comprises a removal equipment main body, a biomass gasification gas input pipe is arranged on one side of the removal equipment main body, a spraying adsorption cavity is formed in the upper end of the removal equipment main body, a tail gas discharge cavity is formed in the upper side of the spraying adsorption cavity, a tail gas discharge pipe is arranged on one side of the tail gas discharge cavity, and the tail gas discharge pipe is arranged on the other side of the tail gas discharge cavity. A detergent input end is arranged on one side of the spraying adsorption cavity and connected to the condensation separation circulating tank through a detergent circulating pipe, a detergent circulating driving pump is arranged on the detergent circulating pipe, and a tar discharging pipe is arranged on one side of the lower end of the condensation separation circulating tank. An oil-rich liquid collecting device is arranged at the bottom end of the removal equipment main body, and the oil washing method disclosed by the invention can be used for effectively removing tar in gas flow and is particularly suitable for deep removal; the separated tar is a valuable chemical raw material; washing oil can be regenerated and recycled, so that the operation cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of biomass utilization equipment technology, specifically to a biomass tar deep removal equipment and method. Background Technology

[0002] Biomass is the only renewable carbon source containing carbon, characterized by low sulfur content, abundant resources, permanent utilization, and no increase in the total CO2 cycle. Converting it into high-grade oil slurry and biochar through pyrolysis and gasification not only frees humanity from dependence on finite fossil resources but also provides a large amount of charcoal raw materials for markets such as activated carbon, barbecue charcoal, and capacitor charcoal.

[0003] Chinese patent disclosure discloses a graded tar recovery system (application number: 201911247990.8). This system includes a heat exchanger and an integrated tar adsorption-desorption rotary device. The heat exchanger is equipped with baffles and heat exchange tubes, allowing tar to be separated through indirect cooling by the heat exchanger and the inertial separation effect of the baffles. The integrated adsorption-desorption rotary device comprises four identical rotating discs. Each disc rotates in an adsorption zone and desorption zones at different temperatures, driven by a belt. The adsorbent absorbs the tar, achieving separation of tar from coal gas. The adsorbent sequentially desorbs and recovers tar with different boiling points in the desorption zones at different temperatures. However, its recovery rate is low, leading to inconvenience in subsequent gas utilization. Summary of the Invention

[0004] The technical problem solved by the present invention is to provide a device and method for deep removal of biomass tar, so as to solve the problems mentioned in the background art.

[0005] The technical problem solved by this invention is achieved by the following technical solution: A biomass tar deep removal device, comprising: a removal device body, a biomass gasification gas input pipe on one side of the removal device body, a spray adsorption chamber at the upper end of the removal device body, a tail gas discharge chamber on the upper side of the spray adsorption chamber, a tail gas discharge pipe on one side of the tail gas discharge chamber, a detergent input end on one side of the spray adsorption chamber, the detergent input end being connected to a condensation separation circulation tank via a detergent circulation pipe, a detergent circulation drive pump being installed on the detergent circulation pipe, a tar discharge pipe on one side of the lower end of the condensation separation circulation tank, an oil-rich liquid collection device at the bottom of the removal device body, the inlet of the oil-rich liquid collection device being connected to the removal device body, and the outlet of the oil-rich liquid collection device being connected to the condensation separation circulation tank; an oil-rich liquid collection tank at the lower end of the removal device body, an oil-rich liquid collection hopper at the lower end of the oil-rich liquid collection tank, and a primary filter tank at the outlet of the lower end of the oil-rich liquid collection hopper.

[0006] Furthermore, the main body of the removal equipment includes an inner shell and an outer shell, and a temperature control tube is provided between the inner shell and the outer shell. One end of the temperature control tube is provided with an input control cavity and the other end is provided with an output control cavity. The inner shell and the outer shell are connected to the input control cavity and the output control cavity through a shell connecting flange.

[0007] Furthermore, an insulation filling layer is provided between the inner shell and the outer shell, and connecting and fixing flanges are provided at both ends of the inner shell and the outer shell. Several monitoring equipment mounting seats are provided on one side of the main body of the removal equipment.

[0008] Furthermore, the temperature control tube is provided with control tube connection flanges at both ends. The control tube connection flanges are welded and fixed to the outer casing. The control tube connection flanges are connected to the input control cavity and the output control cavity by fixing bolts.

[0009] Furthermore, the spray adsorption chamber includes a spray adsorption shell, the upper end of which is provided with an upper connecting flange I and the lower end with a lower connecting flange I, a detergent input pipe is provided on one side of the spray adsorption shell, a detergent input control valve is provided on the detergent input pipe, and a detergent spraying end is provided inside the spray adsorption shell.

[0010] Furthermore, the detergent spray head includes a main spray pipe, a plurality of spray branch pipes are provided on the outside of the main spray pipe, a plurality of nozzle fixing seats are provided on the main spray pipe and the spray branch pipes, and a spiral dispersing nozzle is provided on the nozzle fixing seat.

[0011] Furthermore, the exhaust gas discharge chamber includes an exhaust gas discharge housing, the lower end of which is provided with a lower connecting flange II, and the upper end of which is provided with an upper sealing plate.

[0012] Furthermore, the condensation separation circulation tank includes an oil-rich liquid inlet, a tar outlet, and a detergent circulation outlet. A water bath cooling tank is provided on the outside of the condensation separation circulation tank, and a filter screen is provided inside the condensation separation circulation tank at the upper end of the tar outlet.

[0013] Furthermore, the oil-rich liquid collection device includes an oil-rich liquid collection and conveying pipe, a spiral conveying blade is provided inside the oil-rich liquid collection and conveying pipe, the spiral conveying blade is mounted on a liquid drive shaft, the liquid drive shaft is mounted on the output end of the oil-rich liquid collection and conveying motor, and the oil-rich liquid collection and conveying pipe is connected to a condensation separation circulation tank.

[0014] A method for deep removal of biomass tar includes the following steps: Step (1). Prepare the washing oil: Select the detergent and store it in the lean oil tank; Step (2). Gas-liquid countercurrent contact: The tar-containing gas to be treated is introduced from the bottom of the main body of the removal equipment, while the washing oil is sprayed down from the top of the washing tower. Step (3). Adsorption separation: Inside the tower, the gas and oil come into full contact. Tar vapor and tiny droplets are captured and absorbed by the washing oil, and the clean gas is discharged from the top of the tower and enters the subsequent process. Step (4). Rich oil collection: The washing oil that has absorbed tar is discharged from the bottom of the main body of the removal equipment and flows into the condensation separation circulation tank, ready to enter the regeneration unit; Step (5). Cool the rich oil to a temperature at which the solubility of the tar components decreases sharply. As the temperature decreases, the tar precipitates out of the oil, forming a two-phase mixture. Step (6). Tar is discharged from the bottom as a high-viscosity liquid or semi-solid for collection and further processing; the supernatant is the regenerated lean oil, and the regenerated washing oil is pumped back to the main body of the removal equipment for adsorption of tar again, so as to achieve recycling.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the oil washing method of the present invention can effectively remove tar from the airflow, and is especially suitable for deep removal; the separated tar is a valuable chemical raw material; the washing oil can be regenerated and recycled, reducing operating costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the main structure of the removal device of the present invention.

[0018] Figure 3 This is a schematic diagram of the oil-rich liquid collection tank structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the spray adsorption chamber structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the detergent spray nozzle structure of the present invention.

[0021] Figure 6 This is a schematic diagram of the exhaust gas discharge chamber structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the condensation separation circulation tank structure of the present invention.

[0023] Figure 8 This is a schematic diagram of the structure of the oil-rich liquid collection device of the present invention.

[0024] Figure 9 This is a schematic diagram of the installation of the temperature control tube of the present invention. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention will be further described below with reference to specific illustrations. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection between the internal parts of two components.

[0026] Example 1 like Figures 1-9 As shown, a biomass tar deep removal device includes: a main body 2 of the removal device, a biomass gasification gas input pipe 1 on one side of the main body 2, a spray adsorption chamber 3 at the upper end of the main body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input end 6 on one side of the spray adsorption chamber 3, the detergent input end 6 being connected to a condensation separation circulation tank 8 via a detergent circulation pipe 7, and a detergent circulation drive on the detergent circulation pipe 7. A pump 11 is provided. A tar discharge pipe 10 is provided on one side of the lower end of the condensation separation circulation tank 8. A rich oil liquid collection device 9 is provided at the bottom of the main body 2 of the removal equipment. The inlet of the rich oil liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the rich oil liquid collection device 9 is connected to the condensation separation circulation tank 8. A rich oil liquid collection tank 24 is provided at the lower end of the main body 2 of the removal equipment. A rich oil liquid collection hopper 25 is provided at the lower end of the rich oil liquid collection tank 24. A primary filter tank 26 is provided on the outlet of the rich oil liquid collection hopper 25.

[0027] Example 2 like Figures 1-9As shown, a biomass tar deep removal device includes: a removal device body 2, a biomass gasification gas input pipe 1 on one side of the removal device body 2, a spray adsorption chamber 3 at the upper end of the removal device body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input terminal 6 on one side of the spray adsorption chamber 3, the detergent input terminal 6 being connected to a condensation separation circulation tank 8 via a detergent circulation pipe 7, a detergent circulation drive pump 11 being installed on the detergent circulation pipe 7, and a condensation separation circulation tank 8 having a [missing information - likely a device name or design]. The device includes a tar discharge pipe 10. A rich oil liquid collection device 9 is located at the bottom of the main body 2 of the removal equipment. The inlet of the rich oil liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the rich oil liquid collection device 9 is connected to a condensation and separation circulation tank 8. The main body 2 of the removal equipment includes an inner shell and an outer shell 21. A temperature control pipe 23 is located between the inner shell and the outer shell 21. One end of the temperature control pipe 23 has an input control chamber 12, and the other end has an output control chamber 13. The inner shell and the outer shell 21 are connected to the input control chamber 12 and the output control chamber 13 via shell connecting flanges 22. A thermal insulation filling layer is provided between the inner shell and the outer shell 21. Connecting and fixing flanges are located at both ends of the inner shell and the outer shell 21. Several monitoring equipment mounting seats are located on one side of the main body 2 of the removal equipment. Control pipe connecting flanges are located at both ends of the temperature control pipe 23. The control pipe connecting flanges are welded and fixed to the outer shell 21 and are connected to the input control chamber 12 and the output control chamber 13 via fixing bolts.

[0028] Example 3 like Figures 1-9As shown, a biomass tar deep removal device includes: a main body 2, a biomass gasification gas input pipe 1 on one side of the main body 2, a spray adsorption chamber 3 at the upper end of the main body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input end 6 on one side of the spray adsorption chamber 3, the detergent input end 6 being connected to a condensation separation circulation tank 8 via a detergent circulation pipe 7, a detergent circulation drive pump 11 being installed on the detergent circulation pipe 7, and tar being disposed on one side of the lower end of the condensation separation circulation tank 8. The discharge pipe 10 is provided. The bottom end of the main body 2 of the removal equipment is equipped with an oil-rich liquid collection device 9. The inlet of the oil-rich liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the oil-rich liquid collection device 9 is connected to the condensation separation circulation tank 8. The spray adsorption chamber 3 includes a spray adsorption shell 31. The upper end of the spray adsorption shell 31 is provided with an upper connecting flange I32, and the lower end is provided with a lower connecting flange I33. A detergent input pipe 34 is provided on one side of the spray adsorption shell 31. A detergent input control valve 35 is provided on the detergent input pipe 34. A detergent spray nozzle is provided inside the spray adsorption shell 31. The detergent spray nozzle includes a main spray pipe 36. Several spray branch pipes 37 are provided on the outside of the main spray pipe 36. Several nozzle fixing seats 38 are provided on the main spray pipe 36 and the spray branch pipes 37. Spiral dispersion nozzles 39 are provided on the nozzle fixing seats 38.

[0029] Example 4 like Figures 1-9 As shown, a biomass tar deep removal device includes: a removal device body 2, a biomass gasification gas input pipe 1 on one side of the removal device body 2, a spray adsorption chamber 3 at the upper end of the removal device body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input end 6 on one side of the spray adsorption chamber 3, and the detergent input end 6 is connected to a condensation separation circulation tank 8 through a detergent circulation pipe 7. The detergent circulation pipe 7 is equipped with... A detergent circulation drive pump 11 is provided. A tar discharge pipe 10 is provided on one side of the lower end of the condensation separation circulation tank 8. A rich oil liquid collection device 9 is provided at the bottom of the main body 2 of the removal equipment. The inlet of the rich oil liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the rich oil liquid collection device 9 is connected to the condensation separation circulation tank 8. The tail gas discharge chamber 4 includes a tail gas discharge shell 41. A lower connecting flange II 42 is provided at the lower end of the tail gas discharge shell 41, and an upper sealing plate 43 is provided at the upper end of the tail gas discharge shell 41.

[0030] Example 5 like Figures 1-9As shown, a biomass tar deep removal device includes: a main body 2 of the removal device, a biomass gasification gas input pipe 1 on one side of the main body 2, a spray adsorption chamber 3 at the upper end of the main body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input end 6 on one side of the spray adsorption chamber 3, the detergent input end 6 being connected to a condensation separation circulation tank 8 via a detergent circulation pipe 7, and a detergent circulation drive on the detergent circulation pipe 7. The pump 11 is provided. A tar discharge pipe 10 is provided on one side of the lower end of the condensation separation circulation tank 8. A rich oil liquid collection device 9 is provided at the bottom of the main body 2 of the removal equipment. The inlet of the rich oil liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the rich oil liquid collection device 9 is connected to the condensation separation circulation tank 8. The condensation separation circulation tank 8 includes a rich oil liquid inlet, a tar outlet, and a detergent circulation outlet. A water bath cooling tank is provided on the outside of the condensation separation circulation tank 8. A filter screen is provided in the condensation separation circulation tank 8 above the tar outlet.

[0031] Example 6 like Figures 1-9 As shown, a biomass tar deep removal device includes: a main body 2 of the removal device, a biomass gasification gas input pipe 1 on one side of the main body 2, a spray adsorption chamber 3 at the upper end of the main body 2, a tail gas discharge chamber 4 on the upper side of the spray adsorption chamber 3, a tail gas discharge pipe 5 on one side of the tail gas discharge chamber 4, a detergent input end 6 on one side of the spray adsorption chamber 3, the detergent input end 6 being connected to a condensation separation circulation tank 8 via a detergent circulation pipe 7, a detergent circulation drive pump 11 being installed on the detergent circulation pipe 7, and a tar discharge pipe on one side of the lower end of the condensation separation circulation tank 8. The bottom of the main body 2 of the removal equipment is provided with an oil-rich liquid collection device 9. The inlet of the oil-rich liquid collection device 9 is connected to the main body 2 of the removal equipment, and the outlet of the oil-rich liquid collection device 9 is connected to the condensation separation circulation tank 8. The oil-rich liquid collection device 9 includes an oil-rich liquid collection and conveying pipe 91. The oil-rich liquid collection and conveying pipe 91 is provided with a spiral conveying blade 92. The spiral conveying blade 92 is mounted on a liquid drive shaft 93. The liquid drive shaft 93 is mounted on the output end of the oil-rich liquid collection and conveying motor 94. The oil-rich liquid collection and conveying pipe 91 is connected to the condensation separation circulation tank 8.

[0032] A method for deep removal of biomass tar includes the following steps: Step (1). Prepare the washing oil: Select a suitable detergent (e.g., diesel, coal tar oil, or specific industrial circulating oil) and store it in a lean oil tank.

[0033] Step (2). Gas-liquid countercurrent contact: The tar-containing gas to be treated (such as crude coal gas) is introduced from the bottom of the scrubbing tower. At the same time, pre-cooled scrubbing oil is sprayed down from the top of the scrubbing tower.

[0034] Step (3). Adsorption separation: Inside the tower, the gas and oil come into full contact. Tar vapor and tiny droplets are captured and absorbed (dissolved) by the washing oil. The clean gas is discharged from the top of the tower and enters the subsequent process.

[0035] Step (4). Rich oil collection: The washing oil (rich oil) that has absorbed tar is discharged from the bottom of the washing tower and flows into the rich oil tank, ready to enter the regeneration unit.

[0036] Step (5). Cool the rich oil to a temperature at which the solubility of tar components (especially high-boiling-point and high-viscosity components) decreases sharply (e.g., by indirect cooling using chilled brine or cold water). As the temperature decreases, the tar precipitates from the oil, forming a two-phase mixture. Solid / liquid separation (or liquid / liquid separation): The cooled mixture is fed into a settling tank, centrifuge, or filter.

[0037] Step (6). The tar, as a high-viscosity liquid or semi-solid, is discharged from the bottom for collection and further processing (as a chemical raw material). The supernatant is the regenerated lean oil, and the regenerated washing oil (lean oil) is pumped back to the washing tower for reuse in adsorbing tar, thus achieving recycling.

[0038] This invention utilizes the solubility of tar in specific oil solvents to achieve separation, and regenerates the adsorbent (oil) and precipitates the tar through subsequent treatment. Tar-containing gas passes through a packed tower or scrubber, contacting countercurrently with the scrubbing oil acting as the adsorbent. Tar components (polycyclic aromatic hydrocarbons, etc.) are absorbed (dissolved) by the scrubbing oil. The treated clean gas leaves the scrubbing tower, while the tar-rich scrubbing oil flows into a subsequent treatment unit. The tar, as a high-viscosity liquid or semi-solid, is discharged from the bottom for collection and further treatment. The regenerated scrubbing oil (lean oil) is pumped back to the scrubbing tower for reuse in adsorbing tar, achieving recycling.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biomass tar deep removal device, comprising: The main body (2) of the degassing equipment is characterized in that: a biomass gasification gas input pipe (1) is provided on one side of the main body (2), a spray adsorption chamber (3) is provided at the upper end of the main body (2), a tail gas discharge chamber (4) is provided on the upper side of the spray adsorption chamber (3), a tail gas discharge pipe (5) is provided on one side of the tail gas discharge chamber (4), a detergent input end (6) is provided on one side of the spray adsorption chamber (3), the detergent input end (6) is connected to the condensation separation circulation tank (8) through a detergent circulation pipe (7), and a detergent circulation drive pump (11) is provided on the detergent circulation pipe (7). A tar discharge pipe (10) is provided on one side of the lower end of the condensation separation circulation tank (8). A rich oil liquid collection device (9) is provided at the bottom of the main body (2) of the removal equipment. The inlet of the rich oil liquid collection device (9) is connected to the main body (2) of the removal equipment, and the outlet of the rich oil liquid collection device (9) is connected to the condensation separation circulation tank (8). A rich oil liquid collection tank (24) is provided at the lower end of the main body (2) of the removal equipment. A rich oil liquid collection hopper (25) is provided at the lower end of the rich oil liquid collection tank (24). A primary filter tank (26) is provided at the outlet of the lower end of the rich oil liquid collection hopper (25).

2. The biomass tar deep removal equipment according to claim 1, characterized in that: The main body (2) of the removal equipment includes an inner shell and an outer shell (21). A temperature control tube (23) is provided between the inner shell and the outer shell (21). One end of the temperature control tube (23) is provided with an input control cavity (12) and the other end is provided with an output control cavity (13). The inner shell and the outer shell (21) are connected to the input control cavity (12) and the output control cavity (13) through a shell connecting flange (22).

3. The biomass tar deep removal equipment according to claim 2, characterized in that: A thermal insulation filling layer is provided between the inner shell and the outer shell (21). The inner shell and the outer shell (21) are provided with connecting and fixing flanges at both ends. Several monitoring equipment mounting seats are provided on one side of the main body (2) of the removal equipment.

4. The biomass tar deep removal equipment according to claim 2, characterized in that: The temperature control tube (23) has control tube connection flanges at both ends. The control tube connection flanges are welded and fixed to the outer shell (21). The control tube connection flanges are connected to the input control chamber (12) and the output control chamber (13) by fixing bolts.

5. The biomass tar deep removal equipment according to claim 1, characterized in that: The spray adsorption chamber (3) includes a spray adsorption housing (31), the upper end of which is provided with an upper connecting flange I (32) and the lower end with a lower connecting flange I (33). A detergent input pipe (34) is provided on one side of the spray adsorption housing (31), and a detergent input control valve (35) is provided on the detergent input pipe (34). A detergent spray end is provided inside the spray adsorption housing (31).

6. The biomass tar deep removal equipment according to claim 5, characterized in that: The detergent spray head includes a main spray pipe (36), and a number of spray branch pipes (37) are provided on the outside of the main spray pipe (36). A number of nozzle fixing seats (38) are provided on the main spray pipe (36) and the spray branch pipes (37), and a spiral dispersing nozzle (39) is provided on the nozzle fixing seat (38).

7. The biomass tar deep removal equipment according to claim 1, characterized in that: The exhaust gas discharge chamber (4) includes an exhaust gas discharge housing (41), the lower end of which is provided with a lower connecting flange II (42), and the upper end of which is provided with an upper sealing plate (43).

8. The biomass tar deep removal equipment according to claim 1, characterized in that: The condensation separation circulation tank (8) includes an oil-rich liquid inlet, a tar outlet, and a detergent circulation outlet. A water bath cooling tank is provided on the outside of the condensation separation circulation tank (8), and a filter screen is provided inside the condensation separation circulation tank (8) at the upper end of the tar outlet.

9. The biomass tar deep removal equipment according to claim 1, characterized in that: The oil-rich liquid collection device (9) includes an oil-rich liquid collection and delivery pipe (91), and a spiral delivery blade (92) is provided inside the oil-rich liquid collection and delivery pipe (91). The spiral delivery blade (92) is mounted on a liquid drive shaft (93), and the liquid drive shaft (93) is mounted on the output end of an oil-rich liquid collection and delivery motor (94). The oil-rich liquid collection and delivery pipe (91) is connected to a condensation separation circulation tank (8).

10. A method for deep removal of biomass tar, comprising the following steps: Step (1). Prepare the washing oil: Select the detergent and store it in the lean oil tank; Step (2). Gas-liquid countercurrent contact: The tar-containing gas to be treated is introduced from the bottom of the main body of the removal equipment, while the washing oil is sprayed down from the top of the washing tower. Step (3). Adsorption separation: Inside the tower, the gas and oil come into full contact. Tar vapor and tiny droplets are captured and absorbed by the washing oil, and the clean gas is discharged from the top of the tower and enters the subsequent process. Step (4). Rich oil collection: The washing oil that has absorbed tar is discharged from the bottom of the main body of the removal equipment and flows into the condensation separation circulation tank, ready to enter the regeneration unit; Step (5). Cool the oil to a temperature at which the solubility of the tar components decreases sharply. As the temperature decreases, the tar precipitates out of the oil, forming a two-phase mixture. Step (6). Tar is discharged from the bottom as a high-viscosity liquid or semi-solid for collection and further processing; the supernatant is the regenerated lean oil, and the regenerated washing oil is pumped back to the main body of the removal equipment for adsorption of tar again, so as to achieve recycling.

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