Graphite falling film absorption device

Abstract

The utility model relates to a graphite falling film absorption device which comprises a graphite cooling assembly for cooling a gas-liquid mixture, and a mixing absorption assembly for mixing input gas flow and liquid flow to enable part of gas to be absorbed by the liquid flow is arranged at the axial upper end of the graphite cooling assembly. The axial lower end of the graphite cooling assembly is provided with a gas-liquid shunting and discharging assembly capable of independently outputting liquid after cooling and residual gas; the two axial ends of the graphite cooling assembly are sleeved with through end covers connected with the mixed absorption assembly and the gas-liquid flow dividing and discharging assembly correspondingly, and sealing limiting tube plates are arranged in the through end covers. According to the device, the dispersion uniformity of the absorption liquid can be improved, the contact surface area is increased, meanwhile, the gas and the absorption liquid are fully contacted by limiting the movement path of the gas, so that the absorption separation rate and the fusion efficiency are improved, and the concentration uniformity and the temperature balance of the absorption liquid are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to graphite falling film absorption equipment technical field especially, it relates to a graphite falling film absorption device. BACKGROUND

[0002] Graphite falling film absorption equipment is the falling film gas absorption equipment with impermeable graphite as the main body, because graphite manufacturing material has good physical mechanical properties, processing performance and excellent corrosion resistance and high thermal conductivity, therefore is mainly used in the reaction and absorption of gas and liquid fields, is a very important chemical equipment, mainly is used in the production of hydrochloric acid and NH3, SO3, H2S etc. Corrosive gas absorption or separation. Graphite falling film absorption equipment absorption cooling section is divided into two kinds according to structure and is column tube type and round block hole type, and their structural classification is same with column tube type and round block hole type graphite heat exchanger. The heat exchange material of round block hole type graphite falling film absorber is the cylindrical graphite block with hole, and the heat exchange material of column tube type graphite falling film absorber is graphite heat exchange tube bundle, and column tube type graphite falling film absorber occupies the main position, and its advantage is that graphite heat exchange tube bundle directly contacts with medium, and the heat exchange area is larger, and absorption cooling effect is better.

[0003] However, the existing gas-liquid distributor is usually directly into the absorption liquid and gas into the same chamber, so that the gas and the surface of the absorption liquid contact to complete the fusion of the two, so that the absorption liquid can absorb or separate the specific gas component, limited by the actual contact area and the movement activity and dispersion of gas-liquid material, the gas cannot effectively and fully contact with the absorption liquid, and there is the problem of low absorption separation rate and fusion efficiency, and due to the poor absorption efficiency and insufficient absorption, the concentration of the absorption liquid after absorbing the gas is unevenly distributed and the temperature is locally deviated, and part of the absorption liquid with too high temperature cannot be fully cooled in the graphite column tube, which affects the subsequent cooling effect and quality. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of graphite falling film absorption device, which can improve the dispersion uniformity of absorption liquid and increase the contact surface area, and make the gas fully contact with the absorption liquid by limiting the movement path of the gas, to improve the absorption separation rate and fusion efficiency, and ensure the concentration uniformity and temperature uniformity of the absorption liquid, to solve the problem of poor gas-liquid mixing absorption separation effect, small contact area and inefficient gas-liquid fusion of existing graphite falling film absorption.

[0005] The utility model discloses a graphite falling film absorption device, including the graphite cooling assembly that can carry out cooling to gas -liquid mixture, is provided with the mixed absorption assembly that can mix the input airflow and liquid stream and make part gas be absorbed by the liquid stream on the axial upper end of graphite cooling assembly, and is provided with the gas -liquid shunt external exhaust component that can independently output the liquid after cooling liquid and residual gas respectively on the axial lower end of graphite cooling assembly, the axial both ends of graphite cooling assembly all cover and connect the through end cover of mixed absorption assembly and gas -liquid shunt external exhaust component respectively in the through end cover, and be provided with sealed spacing pipe plate in the through end cover.

[0006] According to a preferred embodiment, the mixed absorption assembly comprises an outer cylinder, an inner cylinder, a blocking flow guide plate, an exhaust pipe shell and a liquid supply vertical pipe, wherein the outer cylinder and the inner cylinder are coaxially inserted and sleeved and installed on the top surface of the through end cover in a manner of forming a gas guide ring gap, and the axial upper end of the outer cylinder is further provided with a blocking flow guide plate for shielding the top end thereof, the exhaust pipe shell is installed on the top surface of the blocking flow guide plate, and the liquid supply vertical pipe is inserted and installed on the exhaust pipe shell.

[0007] According to a preferred embodiment, the inner cylinder forms an inverted circular truncated cone cavity inside the cylinder body in a manner that the absorption liquid can flow downward along the inner wall of the cavity, and the side wall surface of the inverted circular truncated cone cavity is annularly and spacedly provided with flow guide converging grooves; a plurality of downward inclined exhaust holes capable of communicating the gas guide ring gap and the inverted circular truncated cone cavity are further formed in the cylinder body of the inner cylinder.

[0008] According to a preferred embodiment, the blocking flow guide plate comprises a blocking plate body, a flow splitting cone and through slot holes, wherein the lower plate surface of the blocking plate body is sealingly connected with the top ends of the outer cylinder and the inner cylinder, the flow splitting cone capable of splitting the absorption liquid output by the liquid supply vertical pipe is arranged at the center of the top surface of the blocking plate body, and a plurality of through slot holes communicating with the inverted circular truncated cone cavity are annularly and spacedly arranged on the blocking plate body around the flow splitting cone.

[0009] According to a preferred embodiment, a gas inlet capable of inputting the gas to be separated is arranged on the side surface of the cylinder body of the outer cylinder.

[0010] According to a preferred embodiment, a gas exhaust outlet is arranged on the side surface of the inverted funnel shell of the exhaust pipe shell.

[0011] According to a preferred embodiment, the liquid supply vertical pipe is inserted on the inverted funnel shell in a manner of being coaxial with the flow splitting cone and being suspended above the flow splitting cone.

[0012] According to a preferred embodiment, the gas-liquid separation and exhaust assembly comprises a liquid collection bottom shell, a liquid exhaust pipe and an exhaust inclined pipe, wherein the liquid collection bottom shell is installed on the lower surface of the through end cover at the axial lower end of the graphite cooling assembly; the lower surface of the liquid collection bottom shell is provided with the liquid exhaust pipe capable of exhausting the absorption liquid, and the exhaust inclined pipe is further inserted on the side wall upper edge of the liquid collection bottom shell.

[0013] According to a preferred embodiment, the graphite cooling assembly comprises a cooling shell, graphite column pipes and a baffle limiting plate, wherein a plurality of parallel graphite column pipes are arranged in the cooling shell in parallel with the axial direction of the cooling shell, and the graphite column pipes are limited in the installation position by being inserted on the baffle limiting plate.

[0014] According to a preferred embodiment, the two ends of the graphite column pipes are tightly inserted on the sealing limiting pipe plate; and the cooling liquid inlet and the cooling liquid outlet are inserted on the two sides of the cooling shell in a staggered manner and are communicated with the shell cavity.

[0015] The utility model has the advantages of:

[0016] The mixed absorption assembly can expand the surface area of the liquid flow layer formed when the absorption liquid flows downward in an inclined manner, and the mixed absorption assembly can effectively absorb the gas by penetrating the liquid flow layer and continuously changing the motion state of the gas with the surface of the liquid flow layer, thereby improving the absorption efficiency and absorption degree. The mixed absorption assembly can also uniformly distribute the absorption liquid to form a liquid flow layer with approximately uniform thickness on the inclined surface in different directions, and the input of the gas is also ensured to be uniformly dispersed by the dot matrix multi-point input, thereby ensuring the uniformity of the synchronous absorption and separation in each region, ensuring the concentration of the absorption liquid after absorbing the gas to be approximately uniform, and the mixed absorption assembly can also perform a cross-flow mixing of the absorption liquid before output, thereby improving the concentration uniformity and temperature uniformity of the absorption liquid, thereby ensuring that the absorption liquid can be uniformly distributed and the heat dissipation effect is balanced during the subsequent secondary distribution and cooling process, thereby improving the effect and quality of the subsequent cooling.

[0017] The outer cylinder and the inner cylinder can form a gas guiding ring gap, so that the gas in the gas guiding ring gap can pass through the cylinder of the inner cylinder and further pass through the absorption liquid flow layer flowing on the inner wall of the inner cylinder, so that when the gas penetrates the liquid flow layer, the absorbed components can be effectively absorbed by the absorption liquid, thereby ensuring the sufficiency of gas-liquid fusion and the effectiveness of gas separation. The blocking flow guide plate can guide the absorption liquid output by the liquid supply vertical pipe to form a substantially uniform and multidirectional distribution of the liquid flow layer, so that the absorption liquid guided by the blocking flow guide plate can flow on the inner wall of the inner cylinder to effectively contact the gas. The exhaust pipe shell can limit the gas guiding space above the blocking flow guide plate, so that the gas rising in the inner cylinder can further move through the blocking flow guide plate, thereby being in contact with the absorption liquid flow on the surface of the blocking flow guide plate under the limitation of the exhaust pipe shell, thereby improving the sufficiency and effect of component separation. The inner cylinder and the blocking flow guide plate can build a larger liquid flow conveying surface, thereby ensuring that there is a large enough contact surface between the absorption liquid and the gas to ensure the sufficiency of contact absorption. And the absorption liquid with low content on the blocking flow guide plate can perform secondary absorption separation of residual absorbable components of the upward gas, thereby improving and ensuring the absorption efficiency and sufficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a preferred structure of a graphite falling film absorption device according to the present application;

[0019] Fig. 2 is a preferred structure of a graphite falling film absorption device according to the present application;

[0020] Fig. 3 is a preferred structure of a graphite falling film absorption device according to the present application.

[0021] LIST OF REFERENCE NUMBERS

[0022] 1: graphite cooling assembly; 2: mixed absorption assembly; 3: gas-liquid diversion and discharge assembly; 4: through end cover; 5: sealing and limiting tube plate; 11: cooling shell; 12: graphite column tube; 13: baffle limiting plate; 111: cooling liquid inlet; 112: cooling liquid outlet; 21: outer cylinder; 22: inner cylinder; 23: blocking flow guide plate; 24: exhaust pipe shell; 25: liquid supply vertical pipe; 211: gas inlet; 221: inverted circular table cylinder cavity; 222: flow guiding and converging groove; 223: downward inclined exhaust hole; 231: blocking plate body; 232: diversion cone; 233: through groove; 241: inverted funnel shell; 242: exhaust port; 31: liquid collecting bottom shell; 32: liquid discharge pipe; 33: exhaust inclined pipe. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings structure is only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise of not paying creative labor.

[0024] The technical solutions provided by the present application will be described in detail below with reference to the drawings by way of embodiments. It should be noted that the description of these embodiments is used to help understand the present application, and does not constitute a limitation on the present application. In some examples, since some embodiments belong to prior art or conventional technology, they are not described or not described in detail.

[0025] In addition, the technical features described in this paper, or the steps in all the methods or processes disclosed, can be combined in any suitable way in one or more embodiments, except for mutually exclusive features and / or steps. It is easy for those skilled in the art to understand that the order of steps or operations related to the embodiments provided herein can also be changed. Any order in the drawings and embodiments is only used for illustration and does not imply that it is required to follow a certain order unless it is explicitly stated that it is required to follow a certain order.

[0026] The serial numbers of components in this paper, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. The "connection" and "coupling" in this application include direct and indirect connection (coupling) under reasonable circumstances (not contradictory).

[0027] The following will be described in detail in combination with the drawings. Embodiments

[0028] The present application provides a graphite falling film absorption device, which comprises a graphite cooling assembly 1, a mixed absorption assembly 2, a gas-liquid diversion and exhaust assembly 3, a through end cover 4 and a sealing and limiting tube plate 5.

[0029] According to Figs. 1-3In one specific embodiment, the graphite cooling assembly 1 is capable of cooling the gas-liquid mixture to transfer and absorb the heat generated during melting. A mixing and absorbing assembly 2 is arranged at the axial upper end of the graphite cooling assembly 1 to mix the input gas flow and liquid flow to absorb part of the gas by the liquid flow. A gas-liquid separation and discharge assembly 3 is arranged at the axial lower end of the graphite cooling assembly 1 to separately output the cooled liquid and residual gas. The through end covers 4 are connected to the mixing and absorbing assembly 2 and the gas-liquid separation and discharge assembly 3, respectively. The sealing and limiting tube plate 5 is arranged in the through end cover 4. The mixing and absorbing assembly 2 can expand the surface area of the liquid flow layer formed when the absorbing liquid flows downward, and the mixing and absorbing assembly 2 can effectively absorb the gas by the absorbing liquid through the gas penetrating the liquid flow layer and the effective contact between the liquid flow layer surface and the motion state continuously changing, thereby improving the absorption efficiency and absorption degree. The mixing and absorbing assembly 2 can also uniformly divide the absorbing liquid to form liquid flow layers with approximately uniform thickness on inclined surfaces in different directions, and the input of the gas is also ensured to be uniformly dispersed by the dot matrix multi-point input, thereby ensuring the uniformity of synchronous absorption and separation in each region, ensuring the concentration of the absorbing liquid after absorbing the gas to be approximately uniform, and the mixing and absorbing assembly 2 can also perform a cross-flow mixing of the absorbing liquid before output, thereby improving the concentration uniformity and temperature uniformity of the absorbing liquid, thereby ensuring that the absorbing liquid can be uniformly distributed and the heat dissipation effect is balanced during subsequent secondary flow cooling treatment, thereby improving the effect and quality of subsequent cooling.

[0030] Preferably, the graphite cooling assembly 1 includes a cooling shell 11, graphite column pipes 12, and baffling limiting plates 13. Preferably, a plurality of graphite column pipes 12 parallel to the axial direction of the cooling shell 11 are arranged in the cooling shell 11. Preferably, the graphite column pipes 12 are inserted into the baffling limiting plates 13 to limit the installation position. Further preferably, a plurality of baffling limiting plates 13 are arranged in the cooling shell 11 to limit the serpentine flow path of the cooling liquid in the cooling shell 11. Specifically, the two ends of the graphite column pipes 12 are tightly inserted into the sealing and limiting tube plate 5. Further preferably, the cooling liquid inlet 111 and the cooling liquid outlet 112 are inserted into the two sides of the cooling shell 11 to communicate with the shell cavity.

[0031] Preferably, the mixed absorption assembly 2 comprises an outer cylinder 21, an inner cylinder 22, a blocking flow guide plate 23, an exhaust pipe shell 24 and a liquid supply vertical pipe 25. Preferably, the outer cylinder 21 and the inner cylinder 22 are coaxially inserted into each other and form a gas guiding ring gap on the top surface of the through end cover 4. Preferably, the axial upper end of the outer cylinder 21 is further provided with the blocking flow guide plate 23 which covers the top end of the outer cylinder 21. Preferably, the top surface of the blocking flow guide plate 23 is provided with the exhaust pipe shell 24. Preferably, the exhaust pipe shell 24 is inserted with the liquid supply vertical pipe 25. Preferably, the side surface of the outer cylinder 21 is provided with a gas inlet 211 which can input the gas to be separated. The outer cylinder 21 and the inner cylinder 22 provided in the application can form a gas guiding ring gap, so that the gas in the gas guiding ring gap can pass through the cylinder of the inner cylinder 22 and further penetrate the absorption liquid flow layer flowing on the inner wall of the inner cylinder 22, so that when the gas penetrates the liquid flow layer, the components that can be absorbed by the gas can be effectively absorbed by the absorption liquid, thereby ensuring the sufficiency of gas-liquid fusion and the effectiveness of gas separation. The blocking flow guide plate 23 provided in the application can guide the absorption liquid output by the liquid supply vertical pipe 25 to be effectively dispersed to form a generally uniform and multidirectional distributed liquid flow layer, so that the absorption liquid guided by the blocking flow guide plate 23 can flow on the inner wall surface of the inner cylinder 22 to effectively contact the gas. The exhaust pipe shell 24 provided in the application can define a gas guiding space above the blocking flow guide plate 23, so that the gas rising in the inner cylinder 22 can further move through the blocking flow guide plate 23, thereby being able to contact the absorption liquid flow on the surface of the blocking flow guide plate 23 under the limitation of the exhaust pipe shell 24, thereby improving the sufficiency and effectiveness of component separation. The inner cylinder 22 and the blocking flow guide plate 23 provided in the application can construct a larger liquid flow conveying surface, thereby ensuring that there is a large enough contact surface between the absorption liquid and the gas to ensure the sufficiency of contact absorption. And the absorption liquid with low content on the blocking flow guide plate 23 can perform secondary absorption separation of residual absorbable components of the upward gas, thereby improving and ensuring the absorption efficiency and sufficiency.

[0032] Preferably, the inner cylinder 22 is provided with an inverted truncated cone cavity 221 formed inside the cylinder body in a manner that the absorption liquid can converge along the inclined inner wall of the cavity, so as to realize the convergence of liquid flow and form a liquid seal of the liquid pool that blocks the downward diffusion of gas. Further preferably, the side wall of the inverted truncated cone cavity 221 is provided with a flow guide convergence groove 222 in an annular and spaced manner. Preferably, a plurality of downward inclined exhaust holes 223 are further provided on the cylinder body of the inner cylinder 22, which can communicate with the gas guide ring gap and the inverted truncated cone cavity 221. Specifically, one end of the downward inclined exhaust hole 223 is located on the inclined groove bottom surface of the flow guide convergence groove 222, so that the gas input through the hole cavity of the downward inclined exhaust hole 223 can pass through the liquid flow layer formed by the absorption liquid flowing in the flow guide convergence groove 222, so that part of the dissolved gas can be absorbed by the absorption liquid. The inner cylinder 22 provided in the present application forms an inclined inner wall surface that can guide the flow in a manner of constructing an inverted truncated cone cavity 221, and the flow guide convergence groove 222 is provided on the inclined inner wall surface to improve the uniformity of the thickness of the liquid flow layer formed during flow guiding, so that the liquid flow layer flowing downward can converge at the lower section of the inverted truncated cone cavity 221 to block the lower port of the inverted truncated cone cavity 221, and the accumulated water body in the form of a water pool is used for port shielding, so that the constructed water pool can effectively prevent the gradually accumulated pressurized gas in the cavity of the inverted truncated cone cavity 221 from being discharged from the through groove hole 233 of the blocking flow guide plate 23, but discharged from the lower port of the inverted truncated cone cavity 221. Specifically, the inflow amount of the absorption liquid of the inverted truncated cone cavity 221 is greater than the outflow amount of the lower port, so that the absorption liquid can accumulate into a pool, and when the water body stored in the inner portion increases, the gas space of the cavity is compressed and the pressure increases, so that the water body is forced to be discharged under pressure, avoiding that the water body stored in the inverted truncated cone cavity 221 is too much to effectively accommodate gas. Further preferably, the absorption liquid converged at the lower portion can be effectively fused to improve the uniformity of the concentration and temperature of the absorption liquid.

[0033] Preferably, the blocking baffle 23 comprises a blocking baffle body 231, a flow splitting cone 232 and a through slot hole 233. Preferably, the lower plate surface of the blocking baffle body 231 is sealingly connected with the top end of the outer cylinder 21 and the inner cylinder 22. Preferably, a flow splitting cone 232 is arranged at the center of the top surface of the blocking baffle body 231, which is capable of splitting the absorption liquid output by the liquid supply vertical pipe 25. Further preferably, a plurality of through slot holes 233 are arranged on the blocking baffle body 231 in a manner surrounding the flow splitting cone 232 and communicating with the inverted circular truncated cone cavity 221. Preferably, the through slot holes 233 are arranged in a circumferential direction in a manner that the lower end of the hole cavity corresponds to the flow-restricting slot 222. Specifically, the gas passing through the liquid flow layer in the flow-restricting slot 222 can move to the shell cavity of the exhaust pipe shell 24 through the through slot hole 233 in the process of further rising, and then the residual component substances in the gas that can be absorbed by the absorption liquid can be further absorbed and separated by contacting with the absorption liquid on the surface of the flow splitting cone 232. Specifically, the gas in the process of further rising can be directly discharged from the through slot hole 233 not filled with absorption liquid or penetrated through the falling liquid flow surface formed by the absorption liquid to be discharged from the through slot hole 233 not filled with absorption liquid. Preferably, the flow splitting cone 232 can be a circular cone or a multi-prism cone, so as to effectively disperse the liquid flow and form a liquid flow layer.

[0034] Preferably, the side surface of the inverted funnel shell 241 of the exhaust pipe shell 24 is provided with an exhaust port 242 capable of discharging the unabsorbed gas. Preferably, the liquid supply vertical pipe 25 is inserted into the inverted funnel shell 241 in a manner coaxial with the flow splitting cone 232 and suspended above the flow splitting cone 232. Preferably, the liquid supply vertical pipe 25 is suspended in a manner that the cross-sectional area of the pipe cavity is greater than or equal to the cross-sectional area of the gap between the liquid supply vertical pipe 25 and the flow splitting cone 232, so that the absorption liquid output by the liquid supply vertical pipe 25 can be effectively split by the flow splitting cone 232 while forming a uniform and thin liquid flow layer on the surface of the flow splitting cone 232, thereby reducing the amount of absorption liquid consumed in the absorption process and ensuring the concentration of the mixed liquid after the absorption process. Preferably, a plurality of adjusting circular ring strips are arranged on the inner wall surface of the inverted funnel shell 241 of the exhaust pipe shell 24 in an axial direction, so as to periodically change the flow state of the gas in the shell cavity and accelerate the relative motion between the gas molecules, thereby improving the effectiveness and sufficiency of the contact between the gas and the absorption liquid.

[0035] Preferably, the gas-liquid separation and drainage assembly 3 comprises a liquid collecting bottom shell 31, a liquid drainage port 32 and an air upward inclined pipe 33. Preferably, the liquid collecting bottom shell 31 is installed on the lower surface of the through end cover 4 at the axial lower end of the graphite cooling assembly 1 to form a shell cavity capable of collecting and storing the absorbed liquid of the cooling liquid. Preferably, the lower surface of the liquid collecting bottom shell 31 is provided with the liquid drainage port 32 capable of draining the absorbed liquid. Preferably, the air upward inclined pipe 33 allowing one-way drainage of residual gas is further inserted on the side wall upper edge of the liquid collecting bottom shell 31. Further preferably, a switch valve is arranged in the liquid drainage port 32 to controllably drain and transfer the liquid. Further preferably, a one-way air valve is further arranged in the air upward inclined pipe 33.

[0036] The utility model is not limited to the above optional implementation, anyone can draw other various forms of product under the enlightenment of the utility model, but no matter make any change in its shape or structure, all technical schemes falling into the scope defined by the claims of the utility model fall within the protection scope of the utility model. The utility model should be understood by those skilled in the art that the utility model specification and its drawings are all illustrative and not constitute the limitation to the claims. The protection scope of the utility model is defined by the claims and its equivalents. In the full text, the features guided by "preferably" are only optional ways and should not be understood as necessarily setting, therefore the applicant reserves the right to abandon or delete the relevant preferred features at any time.

Claims

1. A graphite falling film absorption device, comprising a graphite cooling assembly (1) capable of cooling a gas-liquid mixture, characterized in that a mixing and absorption assembly (2) capable of mixing an input gas flow and a liquid flow to absorb part of the gas by the liquid flow is arranged at an axial upper end of the graphite cooling assembly (1), and a gas-liquid diversion and external discharge assembly (3) capable of separately outputting the cooled liquid and residual gas is arranged at an axial lower end of the graphite cooling assembly (1); both axial ends of the graphite cooling assembly (1) are sleeved with through end covers (4) connected to the mixing and absorption assembly (2) and the gas-liquid diversion and external discharge assembly (3) respectively, and a sealing and limiting tube plate (5) is arranged in the through end cover (4). The mixing and absorption assembly (2) comprises an outer cylinder (21), an inner cylinder (22), a blocking and guiding plate (23), an exhaust pipe shell (24), and a liquid supply vertical pipe (25), wherein 2. The falling graphite film absorption apparatus of claim 1, wherein the outer cylinder (21) and the inner cylinder (22) are coaxially inserted and sleeved and arranged on the top surface of the through end cover (4) in a manner of forming a gas guiding ring gap, and the axial upper end of the outer cylinder (21) is further provided with the blocking and guiding plate (23) for shielding the top end thereof, the top surface of the blocking and guiding plate (23) is provided with the exhaust pipe shell (24), and the liquid supply vertical pipe (25) is inserted and arranged on the exhaust pipe shell (24). The inner cylinder (22) forms an inverted circular truncated cone cavity (221) inside the cylinder body in a manner that the absorption liquid can flow downward along the inner wall of the cylinder cavity, and the side wall surface of the inverted circular truncated cone cavity (221) is annularly and spacedly provided with a flow guiding and converging groove (222); 3. The falling graphite film absorption apparatus of claim 2, wherein a plurality of downward inclined exhaust holes (223) capable of communicating the gas guiding ring gap and the inverted circular truncated cone cavity (221) are further formed on the cylinder body of the inner cylinder (22). The blocking and guiding plate (23) comprises a blocking plate body (231), a diversion cone (232), and a through slot hole (233), wherein 4. The falling graphite bed absorption apparatus of claim 3, wherein the lower plate surface of the blocking plate body (231) is sealingly connected to the top ends of the outer cylinder (21) and the inner cylinder (22) at the same time, the diversion cone (232) capable of diverting the absorption liquid output by the liquid supply vertical pipe (25) is arranged at the center of the top surface of the blocking plate body (231), and a plurality of through slot holes (233) communicating with the inverted circular truncated cone cavity (221) are annularly and spacedly arranged on the blocking plate body (231) in a manner surrounding the diversion cone (232). A gas inlet (211) capable of inputting the gas to be separated is arranged on the side surface of the cylinder body of the outer cylinder (21).

5. The falling film graphite absorption apparatus of claim 4, wherein An exhaust port (242) for gas external discharge is arranged on the side surface of the inverted funnel shell (241) of the exhaust pipe shell (24).

6. The falling graphite bed absorption apparatus of claim 5, wherein The liquid supply vertical pipe (25) is inserted on the inverted funnel shell (241) in a manner coaxial with the diversion cone (232) and suspended above the diversion cone (232).

7. The falling graphite bed absorption apparatus of claim 6, wherein The gas-liquid diversion and external discharge assembly (3) comprises a liquid collecting bottom shell (31), a liquid discharge pipe (32), and an exhaust upper inclined pipe (33), wherein 8. The falling graphite bed absorption apparatus of claim 7, wherein ​ The liquid collecting bottom shell (31) is installed on the lower surface of the through end cover (4) at the axial lower end of the graphite cooling assembly (1); The lower surface of the liquid collecting bottom shell (31) is provided with the liquid discharge port (32) capable of discharging the absorbed liquid, and the exhaust upper inclined pipe (33) is further inserted on the side wall upper edge of the liquid collecting bottom shell (31).

9. The falling graphite bed absorption apparatus of claim 8, wherein, The graphite cooling assembly (1) comprises a cooling shell (11), graphite column pipes (12) and a baffle limiting plate (13), wherein, A plurality of graphite column pipes (12) are arranged in the cooling shell (11) in parallel with the axial direction of the cooling shell (11), and the graphite column pipes (12) are limited in the installation position by being inserted on the baffle limiting plate (13).

10. The falling graphite bed absorption apparatus of claim 9, wherein Both ends of the graphite column pipes (12) are tightly inserted on the sealing limiting pipe plate (5); The cooling liquid inlet (111) and the cooling liquid outlet (112) are inserted on both sides of the cooling shell (11) in a staggered manner and are communicated with the shell cavity of the cooling shell (11).

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