Regenerator, absorber oil regeneration system and deslagging method

Abstract

The invention belongs to the technical field of crude benzene recovery systems, and discloses a regenerator, a wash oil regeneration system and a deslagging method. The regenerator includes a housing, a steam distribution tube, and a residue tube. A treatment cavity is formed in the shell, the treatment cavity is divided into a gas phase region and a liquid phase region, the gas phase region is located above the liquid phase region, the liquid phase region is used for containing residues, and the gas phase region is used for containing crude benzene steam. The steam distribution pipe penetrates through the shell and is located on the lower side of the shell, and the steam distribution pipe is configured to spray high-temperature steam to the liquid phase area so that a turbulent flow area can be formed on the upper side of the liquid phase area. An outlet of the residue pipe is communicated with an external residue tank, and the residue pipe partially extends into the treatment cavity, so that an inlet of the residue pipe extends to the liquid phase area, and residues contained in the liquid phase area can be input into the residue tank through the residue pipe. Due to the fact that the inlet of the residue pipe extends into the liquid phase area, interference of high-speed airflow in a turbulent flow area can be avoided, flowing blockage caused by gas-liquid mixing is remarkably reduced, and smooth residue discharging is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of crude benzene recovery systems, and particularly to a regenerator, a wash oil regeneration system, and a slag discharge method. Background Art

[0002] The crude benzene recovery system is a key link in the gas purification process of the coking industry, mainly used for extracting crude benzene (a mixture rich in aromatic hydrocarbons such as benzene, toluene, and xylene) from coke oven gas. After the coke oven gas is cooled and impurities (such as hydrogen sulfide, ammonia, etc.) are removed, it enters the crude benzene recovery system, and the separation and recovery of crude benzene are achieved through processes such as absorption and desorption, and finally a crude benzene product that can be used in chemical production is obtained. The wash oil regeneration system is a supporting unit of the crude benzene recovery system and is used to treat the recycled wash oil. During the repeated absorption of crude benzene, the wash oil will gradually accumulate high-boiling impurities (such as tar slag, asphaltene, etc.), resulting in an increase in its viscosity and a decrease in absorption capacity. The wash oil regeneration system removes the impurities in the wash oil through heating and distillation, etc., restores its absorption performance, and ensures the stable operation of the crude benzene recovery system.

[0003] Among them, the regenerator in the wash oil regeneration system is the core equipment for realizing the efficient regeneration of the wash oil. Its main function is to perform high-temperature heating treatment on the wash oil after absorbing crude benzene, and separate the crude benzene vapor and the residue through distillation, so that the wash oil can restore its absorption capacity and be recycled. Specifically, the existing regenerator mainly includes a shell, a steam distributor, and a residue pipe. The steam distributor is arranged at the bottom or the middle and lower part inside the shell, generally in the form of a perforated pipe or a nozzle structure, and can spray high-temperature steam at 8 - 12 m / s to form a turbulent zone with a diameter of 1.2 - 1.5 m. The residue pipe is arranged at the bottom inside the shell. The working principle of the regenerator is to introduce the wash oil of the crude benzene recovery system into the regenerator, gasify and recover the light components (benzene compounds, low-boiling impurities) through high-temperature heating, concentrate the heavy components into a high-viscosity residue with a viscosity of 300 - 500 cP and deposit it at the bottom, and the turbulent action of the steam distributor strengthens the agitation and heat transfer of the wash oil, and the residue is discharged through the residue pipe to the residue tank.

[0004] However, the inlet of the residue pipe of the existing regenerator is usually located at the edge of the steam distributor. The inlet of the residue pipe is arranged at the outer edge of the turbulent zone, so that it is easy to form a gas-liquid mixed state with the steam flow at the edge of the turbulent zone, resulting in an unstable state of the actual flow of the residue. That is, the fluidity of the high-viscosity residue decreases significantly under the interference of the gas-liquid two-phase turbulence, and it is easy to form a pile at the pipe inlet. The specific manifestations are as follows: The high-speed air flow in the center of the turbulent zone generates an upward drag force, while the flow velocity in the edge area drops suddenly to form a local low pressure, resulting in the residue being unable to effectively enter the pipe under the contradictory action of gravity and air flow drag force, and the gas blockage phenomenon of "only air out and no residue out" frequently occurs during slag discharge. In addition, after the residue is mixed with the steam flow and enters the pipe, incomplete gas-liquid separation will further increase the risk of pipe blockage. The above problems will lead to low slag discharge efficiency of the regenerator and indirectly reduce the output of crude benzene recovery.

[0005] Therefore, the above problems need to be solved urgently. Summary of the Invention

[0006] The purpose of the present invention is to provide a regenerator, a wash oil regeneration system and a slag discharge method to reduce the flow blockage caused by gas-liquid mixing, achieve smooth slag discharge, and improve the wash oil regeneration effect.

[0007] To achieve this purpose, the present invention adopts the following technical solutions:

[0008] A regenerator includes a housing, a steam distribution pipe and a residue pipe, wherein:

[0009] A treatment chamber is formed inside the housing. The treatment chamber is divided into a gas phase region and a liquid phase region, and the gas phase region is located above the liquid phase region. The liquid phase region is used to accommodate the residue, and the gas phase region is used to accommodate the crude benzene vapor;

[0010] The steam distribution pipe passes through the housing and is located on the lower side of the housing. The steam distribution pipe is configured to spray high-temperature steam into the liquid phase region to form a turbulent zone on the upper side of the liquid phase region;

[0011] The outlet of the residue pipe is communicated with an external residue tank, and a part of the residue pipe extends into the treatment chamber so that the inlet of the residue pipe extends to the liquid phase region, so that the residue accommodated in the liquid phase region can be input into the residue tank through the residue pipe.

[0012] Preferably, the inlet of the residue pipe extends to the central position of the liquid phase region.

[0013] Preferably, the regenerator further includes an auxiliary distribution pipe. The auxiliary distribution pipe passes through the housing and is located on the lower side of the liquid phase region. The auxiliary distribution pipe is configured to spray high-temperature steam to the lower side of the liquid phase region.

[0014] Preferably, a liquid seal section that bends upward is formed in the middle of the residue pipe, and the highest position of the liquid seal section is higher than the highest position of the liquid column corresponding to the pressure in the liquid phase region.

[0015] Preferably, an oil inlet is provided on the housing, and the oil inlet is located in the gas phase region. The oil inlet is used to supply the washed oil after absorbing crude benzene.

[0016] Preferably, an oil and gas outlet is provided at the top of the housing, and the oil and gas outlet is used to discharge the crude benzene vapor contained in the gas phase region.

[0017] Preferably, a vent is provided at the top of the housing, and the vent is used to balance the pressure in the treatment chamber so as to stabilize the pressure in the treatment chamber.

[0018] An oil washing regeneration system includes a residue tank, a conveying pipeline, and the above-mentioned regenerator. The washed oil enters the regenerator through the conveying pipeline. The regenerator treats the washed oil and discharges the generated residue into the residue tank.

[0019] A slag discharging method for discharging slag from the above-mentioned regenerator, the slag discharging method includes:

[0020] Supplying the washed oil after absorbing crude benzene to the treatment chamber;

[0021] Making the steam distribution pipe spray high-temperature steam into the liquid phase region to heat the washed oil at high temperature;

[0022] The washed oil separates crude benzene vapor and residue through distillation, so that the crude benzene vapor is contained in the gas phase region and the residue is contained in the liquid phase region;

[0023] Making the residue contained in the liquid phase region enter the residue tank through the residue pipe.

[0024] The slag discharging method further includes: in multiple slag discharging cycles, periodically opening the auxiliary distribution pipe according to a preset rule to spray steam to soften the residue protection layer at the bottom of the liquid phase region.

[0025] Advantages of the present invention:

[0026] Since the inlet of the residue pipe extends into the liquid phase region in the present invention, it can avoid the interference of the high-speed air flow in the turbulent region, and gravity becomes the dominant force driving the flow of the residue. When the slag discharging valve is opened, the residue flows directly from the liquid phase region into the residue tank through the residue pipe under the combined action of the internal pressure of the regenerator (such as the positive pressure generated by the steam) and gravity, avoiding the interference of the gas-liquid mixed phase at the edge of the original turbulent region, significantly reducing the flow blockage caused by the gas-liquid mixing, and realizing smooth slag discharging.

[0027] In addition, by ensuring the timely discharge of residues, it is possible to avoid the accumulation of impurities in the wash oil, maintain the low-viscosity state of the wash oil (preventing the decrease in absorption efficiency caused by increased viscosity), thereby improving the regeneration effect of the wash oil, and further enabling the regenerator to maintain its absorption capacity for crude benzene in coke oven gas, so as to ensure the continuity and high efficiency of the crude benzene recovery process. Description of the Drawings

[0028] Figure 1 is a schematic structural diagram of the regenerator provided by the present invention.

[0029] In the figure:

[0030] 1. Shell; 11. Gas phase region; 12. Liquid phase region; 13. Turbulent region; 2. Steam distribution pipe; 3. Residue pipe; 31. Liquid seal section; 4. Auxiliary distribution pipe; 5. Oil inlet; 6. Oil and gas outlet; 7. Vent port. Detailed Embodiments

[0031] Before explaining any embodiments of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0032] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such element.

[0033] In the present application, the term "and / or" is an associative relationship describing associated objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the sole existence of a centrifugal vortex magnetic pump, the simultaneous existence of a centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, and the sole existence of a centrifugal vortex magnetic pump. Additionally, in the present application, the character " / " generally represents an "and / or" relationship between the associated objects before and after.

[0034] In this application, the terms "connected", "combined", "coupled", and "installed" can be direct connections, combinations, couplings, or installations, or indirect connections, combinations, couplings, or installations. Among them, for example, a direct connection means that two parts or components are connected together without an intermediate member, and an indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings, and can include electrical connections or couplings.

[0035] In this application, those of ordinary skill in the art will understand that relative terms used in connection with a quantity or condition (e.g., "about", "approximately", "substantially", etc.) are intended to include the recited value and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances resulting from manufacture, assembly, use, etc. associated with a particular value. Such terms should also be considered to disclose a range defined by the absolute values of two endpoints. A relative term may refer to a plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values that do not employ relative terms should also be disclosed as having tolerances. In addition, when "substantially" expresses a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular), it may refer to a plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0036] In this application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0037] In this application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, below can include directly below, lower left, lower right, front lower, and rear lower, etc.

[0038] Please refer to Figure 1, this embodiment provides a regenerator, which includes a housing 1, a steam distribution pipe 2 and a residue pipe 3. A treatment chamber is formed inside the housing 1. The treatment chamber is divided into a gas phase region 11 and a liquid phase region 12, and the gas phase region 11 is located above the liquid phase region 12. The liquid phase region 12 is used to accommodate residues, and the gas phase region 11 is used to accommodate crude benzene vapor. The steam distribution pipe 2 passes through the housing 1 and is located on the lower side of the housing 1. The steam distribution pipe 2 is configured to inject high-temperature steam into the liquid phase region 12 to form a turbulent region 13 on the upper side of the liquid phase region 12. The outlet of the residue pipe 3 is communicated with an external residue tank, and a part of the residue pipe 3 extends into the treatment chamber so that the inlet of the residue pipe 3 extends to the liquid phase region 12, so that the residues contained in the liquid phase region 12 can be input into the residue tank through the residue pipe 3.

[0039] With such a setting, the treatment chamber is divided into a gas phase region 11 and a liquid phase region 12. The steam distribution pipe 2 injects high-temperature steam into the liquid phase region 12, which will form a turbulent region 13 on the upper side of the liquid phase region 12. Thus, through the heat transfer and turbulent effect of the steam, light components such as crude benzene in the wash oil are gasified and rise to the gas phase region 11 to form crude benzene vapor. At the same time, heavy components such as tar residue in the wash oil are pushed and deposited to the liquid phase region 12 to form residues, thereby realizing the regeneration of the wash oil.

[0040] It can be understood that the inlet of the residue pipe 3 extends into the liquid phase region 12, which can avoid the interference of the high-speed airflow in the turbulent region 13. Gravity becomes the dominant force driving the flow of the residue. When the slag discharge valve is opened, the residue flows directly from the liquid phase region 12 into the residue tank through the residue pipe 3 under the combined action of the internal pressure of the regenerator (such as the positive pressure generated by the steam) and gravity, avoiding the interference of the gas-liquid mixed phase at the edge of the original turbulent region 13, significantly reducing the flow blockage caused by the gas-liquid mixing, and realizing smooth slag discharge.

[0041] In addition, by ensuring the timely discharge of the residue, it is possible to avoid the accumulation of impurities in the wash oil, maintain the low viscosity state of the wash oil (avoiding the decrease in absorption efficiency caused by the increase in viscosity), thereby improving the regeneration effect of the wash oil, and further enabling the regenerator to maintain the absorption capacity of crude benzene in coke oven gas, so as to ensure the continuity and high efficiency of the crude benzene recovery process.

[0042] This embodiment also provides a slag discharge method using the above regenerator for slag discharge. The slag discharge method includes:

[0043] Supplying the wash oil after absorbing crude benzene to the treatment chamber;

[0044] Making the steam distribution pipe 2 inject high-temperature steam into the liquid phase region 12 to heat the wash oil at a high temperature;

[0045] The wash oil is separated into crude benzene vapor and residues by distillation, so that the crude benzene vapor is accommodated in the gas phase region 11 and the residues are accommodated in the liquid phase region 12;

[0046] The residue contained in the liquid phase region 12 is input into the residue tank through the residue pipe 3.

[0047] It can be understood that the above slag discharge method first separates the crude benzene vapor and the residue by distillation, and then discharges the residue subsequently, which can ensure that the crude benzene in the wash oil is fully vaporized into the gas phase region 11, and the residue is deposited in the liquid phase region 12.

[0048] It can also be understood that due to the timely discharge of the residue, the high-boiling impurities (such as tar slag and asphaltene) in the wash oil do not form an accumulation effect, the viscosity of the wash oil can be maintained at a low level, and its absorption performance for the crude benzene in the coke oven gas can be continuously restored. Thus, the wash oil in the crude benzene recovery system always maintains a high absorption capacity, avoiding fluctuations in the crude benzene extraction efficiency caused by the failure of the wash oil, and ensuring the continuous and stable operation of the entire process.

[0049] Generally speaking, the turbulent region 13 formed by the injection of high-temperature steam by the steam distribution pipe 2 is mainly concentrated on the upper side edge of the liquid phase region 12, and the steam disturbance in the central bottom region of the liquid phase region 12 is significantly weakened. Therefore, in order to further avoid the interference of the gas-liquid mixed phase at the edge of the turbulent region 13, the inlet of the residue pipe 3 extends to the central position of the liquid phase region 12. In addition, after the wash oil is distilled, the heavy components (such as tar slag and asphaltene) gradually settle to the bottom of the liquid phase region 12 due to their large density, and the central region, as the convergence point of gravity sedimentation, has a significantly higher impurity concentration than the edge region. Correspondingly, the inlet at the central position directly faces the high-concentration residue accumulation area, shortening the residue migration path. By using the principle of "near-source drainage", high-load and high-efficiency slag discharge is achieved. Compared with the original edge inlet that relies on the horizontal convection of the wash oil to transport the residue, the central inlet can reduce the energy consumption loss caused by the high viscosity of the wash oil and improve the slag discharge rate.

[0050] It should be noted that the long-term deposition of the residue at the bottom of the liquid phase region 12 is likely to form a high-viscosity hardening layer, resulting in a sharp increase in the slag discharge resistance. For this reason, in this embodiment, the regenerator further includes an auxiliary distribution pipe 4. The auxiliary distribution pipe 4 passes through the housing 1 and is located on the lower side of the liquid phase region 12. The auxiliary distribution pipe 4 is configured to inject high-temperature steam to the lower side of the liquid phase region 12.

[0051] With such a setting, by directly injecting high-temperature steam through the auxiliary distribution pipe 4 to the bottom of the liquid phase region 12, the dual mechanisms of local heating for viscosity reduction and mechanical scouring are achieved, which can effectively prevent the formation of a high-viscosity hardening layer at the bottom of the liquid phase region 12. More importantly, the steam injection direction of the auxiliary distribution pipe 4 can form a cooperative flow field with the inlet of the residue pipe 3. That is, the steam injected by the auxiliary distribution pipe 4 will diffuse upward to form a slightly positive pressure, pushing the residue to converge at the inlet of the residue pipe 3 at the central position, and the steam disturbance at the bottom of the liquid phase region 12 can enable the residue to achieve a dynamic balance between the suspended and sedimentation states, thereby avoiding the static accumulation of the residue at the pipe inlet.

[0052] Correspondingly, the slag discharge method further includes: in multiple slag discharge cycles, the auxiliary distribution pipe 4 is periodically opened according to a preset rule to inject steam to soften the residue protection layer at the bottom of the liquid phase zone 12.

[0053] Exemplarily, the auxiliary distribution pipe 4 is opened once a week and each time lasts for 1-2 hours. The residue protection layer at the bottom of the liquid phase zone 12 is purged by injecting high-temperature steam, and the heat energy and kinetic energy are used to soften the solidified residue and destroy its adhesion state with the bottom of the regenerator. After the opening of the auxiliary distribution pipe 4 ends, the second slag discharge operation of that week (such as the second time in the originally planned three slag discharges per week) is immediately started. At this time, the softened residue is smoothly discharged to the residue tank through the residue pipe 3 under the action of the internal pressure of the regenerator (such as steam positive pressure) and gravity, avoiding slag discharge blockage or extended time caused by slag hardening.

[0054] With such a setting, periodic injection instead of continuous operation can accurately control the steam consumption according to the residue accumulation law (such as slag discharge cycle, throughput, etc.), avoiding energy waste. Compared with traditional high-pressure water flushing or manual cleaning, steam softening is more efficient and has lower energy consumption, especially suitable for systems with existing steam heat sources (such as relying on the factory steam pipe network).

[0055] Particularly, an upwardly curved liquid seal section 31 is formed in the middle of the residue pipe 3, and the highest position of the liquid seal section 31 is higher than the highest position of the liquid column corresponding to the pressure in the liquid phase zone 12. It can be understood that the residue retained in the liquid seal section 31 can form a liquid column barrier to prevent high-temperature steam / crude benzene vapor from leaking from the liquid phase zone 12 to the outside through the residue pipe 3, and can also prevent outside air from being sucked back into the treatment chamber. In addition, the retention of wash oil in the liquid seal section 31 can form a heat buffer layer, which can slow down the cooling rate of the residue in the pipeline and avoid residue solidification caused by sudden temperature drop.

[0056] It can also be understood that when the steam bubbles enter the liquid seal section 31 along with the residue, the upwardly curved liquid seal section 31 can force the bubbles to gather at the top, avoiding the "air lock" phenomenon caused by the formation of a continuous gas column. In addition, the gravity of the liquid column in the descending section of the residue pipe 3 and the pressure in the regenerator act together to enhance the slag discharge driving force and reduce the fluctuation of the residue flow rate.

[0057] To improve the separation effect, an oil inlet 5 is provided on the shell 1. The oil inlet 5 is located in the gas phase region 11 and is used to supply the wash oil after absorbing crude benzene. It can be understood that after the wash oil enters from the gas phase region 11, it needs to fall from the gas phase region 11 to the liquid phase region 12. During this process, the wash oil forms a countercurrent contact with the crude benzene vapor rising in the gas phase region 11, and the wash oil is preheated using the waste heat of the vapor, thereby enabling the vaporization of some light components (such as benzene compounds and low-boiling impurities) in the wash oil to be excited in advance, reducing the distillation load in the liquid phase region 12, and enabling more efficient separation of the heavy component residues during high-temperature heating in the liquid phase region 12. Compared with the method of directly entering the liquid phase region 12 by the wash oil, pre-distillation through the gas phase region 11 reduces the heat consumption of the steam distribution pipe 2, and at the same time reduces the high-temperature residence time of the wash oil in the liquid phase region 12, inhibiting the generation of more high-boiling residues due to overheating of the wash oil, and alleviating the problem of residue accumulation from the source.

[0058] In this embodiment, the oil inlet 5 can enable the wash oil to uniformly cover the surface of the liquid phase region 12 in a falling form to avoid direct disturbance of the core area of the turbulent region 13 by the feed. It should be noted that the specific structure of the oil inlet 5 can be selected according to the actual application scenario, such as a porous pipe, etc., and no specific requirements or limitations are imposed on this.

[0059] It should be pointed out that as the aggregation region of the crude benzene vapor, the crude benzene vapor naturally migrates towards the top of the shell 1 under the action of buoyancy. In this embodiment, an oil and gas outlet 6 is provided at the top of the shell 1, and the oil and gas outlet 6 is used to discharge the crude benzene vapor contained in the gas phase region 11. With such a setting, the top oil and gas outlet 6 directly corresponds to the high-concentration vapor aggregation region of the gas phase region 11, which can minimize the lateral diffusion distance of the vapor in the equipment and reduce the probability of secondary contact with the liquid phase region 12.

[0060] During the distillation process, when high-temperature steam continuously inputs heat or the discharge of crude benzene vapor is blocked (such as the temporary blockage of the oil and gas outlet 6), the pressure in the treatment chamber may rise sharply. For this reason, a relief port 7 is provided at the top of the shell 1, and the relief port 7 is used to balance the pressure in the treatment chamber to keep the pressure in the treatment chamber stable. The relief port 7 serves as a pressure safety release channel and can be automatically or manually opened when the pressure exceeds the set threshold to release excess gas (such as non-condensable gas and excess steam), avoiding safety accidents such as cracking, weld leakage, and even explosion of the shell 1 due to overpressure. It should be noted that the structure of the relief port 7 can be selected according to the actual application scenario, such as a gravity breathing valve, a spring safety valve, etc.

[0061] This embodiment also provides a wash oil regeneration system, including a residue tank, a conveying pipeline, and the above-mentioned regenerator. The wash oil enters the regenerator through the conveying pipeline, and the regenerator processes the wash oil and discharges the generated residues into the residue tank. It can be understood that the wash oil regeneration system including the above-mentioned regenerator can ensure the continuity and efficiency of the crude benzene recovery process.

[0062] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A regenerator, characterized in that, It includes a housing (1), a steam distribution pipe (2), and a residue pipe (3), where: A treatment chamber is formed inside the housing (1). The treatment chamber is divided into a gas phase region (11) and a liquid phase region (12), and the gas phase region (11) is located above the liquid phase region (12). The liquid phase region (12) is used to accommodate residues, and the gas phase region (11) is used to accommodate crude benzene vapor; The steam distribution pipe (2) passes through the housing (1) and is located on the lower side of the housing (1). The steam distribution pipe (2) is configured to inject high-temperature steam into the liquid phase region (12) to form a turbulent region (13) on the upper side of the liquid phase region (12); The outlet of the residue pipe (3) is communicated with an external residue tank, and a part of the residue pipe (3) extends into the treatment chamber so that the inlet of the residue pipe (3) extends to the liquid phase region (12), so that the residues accommodated in the liquid phase region (12) can be input into the residue tank through the residue pipe (3).

2. The regenerator according to claim 1, characterized in that, The inlet of the residue pipe (3) extends to the central position of the liquid phase region (12).

3. A regenerator according to claim 1, characterized in that, The regenerator further includes an auxiliary distribution pipe (4). The auxiliary distribution pipe (4) passes through the housing (1) and is located on the lower side of the liquid phase region (12). The auxiliary distribution pipe (4) is configured to inject high-temperature steam to the lower side of the liquid phase region (12).

4. A regenerator according to claim 1, characterized in that A liquid seal section (31) that bends upward is formed in the middle of the residue pipe (3), and the highest position of the liquid seal section (31) is higher than the highest position of the liquid column corresponding to the pressure in the liquid phase region (12).

5. A regenerator according to claim 1, characterized in that, An oil inlet (5) is provided on the housing (1). The oil inlet (5) is located in the gas phase region (11), and the oil inlet (5) is used to supply the washed oil after absorbing crude benzene.

6. A regenerator according to claim 1, characterized in that, An oil and gas outlet (6) is provided at the top of the housing (1). The oil and gas outlet (6) is used to discharge the crude benzene vapor accommodated in the gas phase region (11).

7. A regenerator according to claim 6, characterized in that, A vent (7) is provided at the top of the housing (1). The vent (7) is used to balance the pressure in the treatment chamber to make the pressure in the treatment chamber stable.

8. An oil washing regeneration system, characterized in that, It includes a residue tank, a pipeline, and the regenerator according to any one of claims 1-7. The washed oil enters the regenerator through the pipeline. The regenerator treats the washed oil and discharges the generated residues into the residue tank.

9. A slag discharging method for discharging slag by using the regenerator according to any one of claims 1-7, characterized in that, The slag discharge method includes: Supplying the washed oil after absorbing crude benzene to the treatment chamber; Making the steam distribution pipe (2) inject high-temperature steam into the liquid phase region (12) to heat the washed oil at high temperature; The washed oil separates crude benzene vapor and residues by distillation, so that the crude benzene vapor is accommodated in the gas phase region (11), and the residues are accommodated in the liquid phase region (12); Making the residues accommodated in the liquid phase region (12) be input into the residue tank through the residue pipe (3).

10. A slag discharging method according to claim 9, characterized in that, The regenerator further includes an auxiliary distribution pipe (4). The auxiliary distribution pipe (4) passes through the housing (1) and is located on the lower side of the liquid phase region (12). The auxiliary distribution pipe (4) is configured to inject high-temperature steam to the lower side of the liquid phase region (12); The slag discharging method further includes: in multiple slag discharging cycles, periodically opening the auxiliary distribution pipe (4) according to a preset rule to spray steam to soften the residue protection layer at the bottom of the liquid phase region (12).

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