CN113717758B

CN113717758B - Desulfurization and decarbonization system for synthesis gas

Info

Publication number: CN113717758B
Application number: CN202110991458.8A
Authority: CN
Inventors: 王明; 刘克勇
Original assignee: Shandong Jinzhi Environmental Protection Technology Co ltd
Current assignee: Shandong Jinzhi Environmental Protection Technology Co ltd
Priority date: 2021-08-27
Filing date: 2021-08-27
Publication date: 2024-02-09
Anticipated expiration: 2041-08-27
Also published as: CN113717758A

Abstract

The invention relates to a desulfurization and decarbonization system for synthesis gas, which comprises a decarbonization tower, a regeneration tower, a reboiler, an organic sulfur hydrolysis reactor and a dry desulfurization device. The lower end of the decarburization tower is provided with a synthetic gas inlet pipe, and an air outlet pipe at the upper end of the decarburization tower is sequentially connected with the organic sulfur hydrolysis reactor and the dry desulfurization device through pipelines. The regeneration tower is connected with the reboiler through a pipeline. The lean liquid outlet at the lower end of the regeneration tower is connected with lean liquid of the decarburization tower though a pipeline, the rich liquid inlet at the upper end of the regeneration tower is connected with the rich liquid discharge pipe of the decarburization tower through a pipeline, and the reboiler is connected with the regeneration tower through a pipeline. The upper part of the inside of the decarburization tower is provided with the gas-water separation function, so that the discharged gas is drier, a gas-water separation device is not required to be separately added in the later stage, and the cost is saved. The outer wall of the reboiler heat exchange tube is not easy to scale, and good heat exchange efficiency can be kept all the time.

Description

Desulfurization and decarbonization system for synthesis gas

Technical Field

The invention belongs to the technical field of hydrogen preparation processes, and particularly relates to a desulfurization and decarbonization system for synthesis gas.

Background

Coal hydrogen production is a main process path for preparing hydrogen, and raw gas of the coal hydrogen production, namely synthesis gas, contains carbon dioxide, sulfides and the like and needs to be cleaned.

The raw material gas from outside the boundary is filtered to remove dust, free liquid and other impurities possibly existing in the gas, the gas is fully contacted with the reversely flowing MDEA solution in the absorption tower from bottom to top through the absorption tower, the acid gases such as CO2, H2S and the like in the gas are absorbed and enter a liquid phase, the unabsorbed components flow out from the top of the absorption tower and are cooled, separated and filtered, and the separated liquid is removed from the boundary to a flash tank.

The MDEA solution absorbing CO2 is called rich solution, is subjected to throttling flash evaporation and then is subjected to normal Jie Da, and the flash evaporation non-condensable gas is discharged after being cooled and separated. The rich liquid enters normal Jie Da and is fully contacted with stripping steam from bottom to top to separate part of acid gases such as CO2 in the rich liquid, the primarily regenerated solution is called semi-lean liquid, the semi-lean liquid from the normal solution tower is divided into two parts after being pressurized by a booster pump, one part of the solution is cooled, is pressurized by a semi-lean liquid pump and then is sent back to the middle part of the absorption tower for circulation, and the other part of the semi-lean liquid enters the regeneration tower after being subjected to heat exchange and temperature rise by a lean-rich liquid heat exchanger and the lean liquid. The semi-lean solution is fully contacted with countercurrent stripping steam from top to bottom through a regeneration tower to resolve acid gases such as CO2 and the like in the semi-lean solution, the acid gases enter normal Jie Da, and the regenerated lean solution enters the top of the absorption tower for circulation after being subjected to heat exchange and cooling and then pressurized by a lean solution pump. The acid gas resolved by Jie Da is cooled, separated and then removed from the boundary, and the separated liquid is pressurized by a recovery pump and then returned to the flash tank for circulation. The heat source of the regenerator is provided by the off-boundary low pressure steam, and the regenerator is a typical stripper.

The lean liquid pump and the semi-lean liquid pump are provided with a solution filter for on-line filtering of part of the solution so as to ensure the cleanliness of the lean liquid. In order to facilitate the preparation of MDEA solution, adjust the water balance of the system and recycle MEDA solution when the system is stopped, the system is provided with an underground storage tank and a solution storage tank. In order to prevent the foaming of the amine liquid system and to quickly foam during foaming, the system is provided with a foam killer storage tank.

Disclosure of Invention

The invention aims to solve the technical problems that: the invention overcomes the defects of the prior art and provides a synthetic gas desulfurization and decarbonization system, and the upper part in the decarbonization tower is provided with a gas-water separation function, so that the discharged gas is drier, a gas-water separation device is not required to be separately added in the later stage, and the cost is saved. The outer wall of the reboiler heat exchange tube is not easy to scale, and good heat exchange efficiency can be kept all the time.

The invention solves the problems existing in the prior art by adopting the technical scheme that:

the system for desulfurizing and decarbonizing synthesis gas includes decarbonizing tower, regenerating tower, reboiler, organic sulfur hydrolyzing reactor and dry desulfurizing unit.

The lower end of the decarburization tower is provided with a synthetic gas inlet pipe, and an air outlet pipe at the upper end of the decarburization tower is sequentially connected with the organic sulfur hydrolysis reactor and the dry desulfurization device through pipelines.

The regeneration tower is connected with the reboiler through a pipeline.

The lean liquid outlet at the lower end of the regeneration tower is connected with lean liquid of the decarburization tower though a pipeline, the rich liquid inlet at the upper end of the regeneration tower is connected with the rich liquid discharge pipe of the decarburization tower through a pipeline, and the reboiler is connected with the regeneration tower through a pipeline.

Preferably, the decarburization tower comprises a first shell, a coil is arranged above the inside of the first shell, a plurality of spraying holes are formed in the coil, and a lean solution inlet pipe which is in through connection with the coil is arranged outside the first shell.

A plurality of sieve plates are arranged below the coil pipe.

The outside of the first shell is provided with a synthetic gas inlet pipe, and a through hole of the synthetic gas inlet pipe and the first shell is positioned below the sieve plate.

The outside of the first shell is provided with a rich liquor discharge pipe which is communicated with the inner cavity of the first shell, and a rich liquor discharge pipe and a through hole of the first shell are positioned below a through hole of the synthesis gas inlet pipe and the first shell.

A plurality of inclined plates are arranged above the coil pipe, the horizontal projection length of each inclined plate is larger than the radius of the first shell, the included angle between each inclined plate and the axis of the first shell is smaller than 90 degrees, a row of inclined plates are respectively arranged on two sides of the axis of the first shell, and the two rows of inclined plates are arranged in a staggered mode.

The top surface of the first shell is connected with an air outlet pipe in a penetrating way.

The cooling device is sleeved at the position outside the first shell corresponding to the inclined plate, and one end of the inclined plate is in contact with the cooling device through the first shell or directly.

The cooling device is an annular cooling sleeve, a cavity is formed in the cooling sleeve, and a refrigerant flows in the cavity.

The outside of the cooling sleeve is provided with a cooling liquid inlet pipe and a cooling liquid outlet pipe which are in through connection with the cooling sleeve, and the cooling liquid inlet pipe is positioned below the cooling liquid outlet pipe.

Preferably, a conical plate is arranged below the sieve plate, and a gap is reserved between the bottom surface of the conical plate and the inner wall of the first shell.

The periphery of the bottom surface of the conical plate is provided with 3-6 connecting blocks, and the conical plate is fixedly connected with the first shell through the connecting blocks.

The mixing cylinder is arranged below the conical plate, and the outer diameter of the mixing cylinder is the same as the inner diameter of the first shell.

The center of the mixing cylinder is provided with an inner cavity with upper and lower ends being arranged in an open mode, and a filler net is arranged at the open position of the upper end of the inner cavity.

The lower half part of the inner cavity is a round table, a sieve plate group is arranged in the round table-shaped area of the inner cavity, the sieve plate group comprises a plurality of sieve plates which are arranged from top to bottom at intervals, and the circumferential surfaces of the sieve plates are in contact with the inner wall of the inner cavity and are fixedly connected with the inner wall of the inner cavity.

Preferably, the through position of the rich liquor discharge pipe and the first shell is positioned on the side wall of the first shell, a vertically arranged blocking plate is blocked at the through position of the rich liquor discharge pipe and the first shell, and a horizontally arranged floating plate is fixed on one side of the blocking plate facing the axis of the first shell.

The two sides of the blocking plate are respectively provided with a vertical rod, the vertical rods are contacted with the side surface of the blocking plate facing the axis of the first shell, the bottom of each vertical rod is fixedly connected with the bottom surface of the first shell, the top of each vertical rod is provided with a limiting rod, and the limiting rods are positioned above the blocking plate.

The bottom of the floating plate is provided with a plurality of supporting rods, and the bottoms of the supporting rods are fixedly connected with the bottom surface of the first shell.

Preferably, the reboiler comprises a second shell, a heat exchange tube is arranged in the second shell, two ends of the heat exchange tube are respectively coaxially and penetratingly connected with an end tube, and the inner diameter of the end tube is smaller than that of the heat exchange tube.

The end pipes penetrate through the outer part of the second shell, the two end pipes are respectively connected with the liquid inlet pipe and the liquid outlet pipe in a coaxial rotating mode, the liquid inlet pipe is in through connection with the bottom of the regeneration tower, the liquid outlet pipe is in through connection with the side wall of the regeneration tower, and electric control valves are arranged on the liquid inlet pipe and the liquid outlet pipe.

The second shell is internally provided with a second scraping plate which is arranged in parallel with the axis of the heat exchange tube, the end face of the second scraping plate is in contact with the outer wall of the heat exchange tube, and the second scraping plate is fixedly connected with the inner wall of the second shell through a fixing rod.

The second shell is provided with a first steam supply pipe and a steam discharge pipe which are communicated with the inner cavity of the second shell.

Preferably, the first steam supply pipe and the steam discharge pipe are respectively positioned at two ends of the circumferential surface of the second shell, and the axes of the first steam supply pipe, the steam discharge pipe and the second shell are positioned in the same plane.

The first steam supply pipe is positioned at one side of the liquid outlet pipe, and the steam discharge pipe is positioned at one side of the liquid inlet pipe.

The liquid collecting box is covered at the through hole of the heat exchange tube and the liquid inlet tube, a plurality of first spray holes are arranged on the circumferential surface of the liquid collecting box, and the first spray holes are used for connecting the inside of the liquid collecting box with the inside of the heat exchange tube in a penetrating way.

The first spray holes are distributed in an annular array around the axis of the heat exchange tube, and the axis of the first spray holes is not coincident with the radial line of the effusion box.

Preferably, the dry desulfurization device comprises a third shell, wherein an upper end air groove and a lower end air groove are respectively fixed on the upper side and the lower side of the inside of the third shell, and a desulfurization groove is slidably arranged between the upper end air groove and the lower end air groove.

The side of the third shell is provided with an inserting opening through which the desulfurization groove can move to the outside of the third shell, and a blank plate is covered on the inserting opening.

The desulfurizing device comprises a desulfurizing tank, wherein a plurality of desulfurizing agent placing grooves are arranged on the desulfurizing tank, a filter plate is respectively arranged at the upper end and the lower end of the desulfurizing agent placing grooves, and desulfurizing agents are filled in the desulfurizing agent placing grooves.

The upper end air tank is provided with first air collecting tanks which are the same as the desulfurizing agent placing tanks in number and are oppositely arranged, and the lower end air tank is provided with second air collecting tanks which are the same as the desulfurizing agent placing tanks in number and are oppositely arranged.

The first gas collecting groove on the upper end gas groove is connected with a first gas inlet pipe in a penetrating mode, and the first gas inlet pipe penetrates through the outer portion of the third shell.

The upper end air tank is provided with connecting air pipes except the first air tank and the inside of the first air tanks with other odd numbers, and the air inlet end of the connecting air pipe is in through connection with the first air tank at the front end of the first air tank.

And connecting air pipes are arranged in the second air collecting grooves which are even arranged on the air grooves at the lower end, and the air inlet ends of the connecting air pipes are in through connection with the second air collecting grooves at the front end of the second air collecting grooves.

The third shell is externally provided with a first exhaust pipe, and the first exhaust pipe is in through connection with one of the first gas collecting tank at the tail end of the upper end gas tank or the second gas collecting tank at the tail end of the lower end gas tank, which are not provided with connecting gas pipes.

Preferably, the inlet end of the connecting air pipe is provided with an air collecting cavity which is communicated with the connecting air pipe, the horizontal section of the air collecting cavity is isosceles trapezoid, and the air collecting cavity is communicated with the connecting air pipe and the first air collecting groove or the second air collecting groove.

Preferably, the organic sulfur hydrolysis reactor comprises a cylindrical shell, and the upper end and the lower end of the shell are respectively connected with a second air inlet pipe and a second air outlet pipe in a penetrating way.

The shell is internally provided with a plurality of catalyst boxes, the bottom surfaces of the catalyst boxes are provided with through holes, and the catalyst boxes are internally filled with organic sulfur hydrolysis catalysts.

An annular steam ring is arranged above the catalyst box, a plurality of second spray holes are arranged on the steam ring, and a second steam supply pipe which is communicated with the steam ring is arranged outside the shell.

The bottom of the shell is a conical tube, the diameter of the opening at the upper end of the conical tube is larger than that of the opening at the lower end of the conical tube, and the second exhaust tube is in through connection with the opening at the lower end of the conical tube.

Preferably, a support ring is supported below the catalyst box, and the support ring is fixedly connected with the inner wall of the shell.

The shell is provided with a replacement opening at the position corresponding to the catalyst box, and the radian of the replacement opening is more than or equal to 180 degrees.

The upper cover of the replacement port is provided with a sealing door.

The two sides of the replacement opening are convexly provided with first fixing plates, and two ends of the sealing door are convexly provided with second fixing plates respectively.

The first fixing plate is connected with the second fixing plate through bolt fastening.

Compared with the prior art, the invention has the beneficial effects that:

(1) The upper part of the inner part of the first shell of the decarburization tower is provided with a gas-water separation function, so that the synthesis gas discharged after decarburization is dried, and a gas-water separation device is not required to be added in the later stage.

(2) The sieve plates, the conical plates and the mixing cylinders of the decarburization tower are arranged layer by layer, so that the contact area of the synthesis gas and MDEA is increased, and the decarburization effect is optimized.

(3) The inlet of the rich liquor discharge pipe of the decarburization tower is provided with a blocking plate which is opened by the buoyancy of the liquor, so that the open area of the inlet of the rich liquor discharge pipe can be ensured to be always positioned below the liquid level, and the synthesis gas is prevented from flowing into the rich liquor discharge pipe.

(4) The reboiler heat exchange tube rotates all the time in the use for the inside liquid of heat exchange tube and its inner wall in close contact improves heat exchange efficiency.

(5) When the reboiler heat exchange tube rotates, the first scraping plate cleans up the outer wall of the heat exchange tube, avoids surface scaling or generating attachments, and maintains the heat exchange efficiency of the heat exchange tube.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the decarburization tower in the desulfurization and decarburization system for the synthesis gas according to the present invention,

FIG. 2 is a first cross-sectional view of a decarbonization tower in a system for desulfurizing and decarbonizing synthesis gas according to the present invention,

figure 3 is a front view of figure 2,

Figure 4 is a partial enlarged view of figure 3 a,

FIG. 5 is a second cross-sectional view of a decarbonization tower in a system for desulfurizing and decarbonizing synthesis gas according to the present invention,

figure 6 is an enlarged view of a portion of figure 5 at B,

FIG. 7 is a third cross-sectional view of a decarbonization tower in a system for desulfurizing and decarbonizing synthesis gas according to the present invention,

FIG. 8 is a schematic diagram of a spray device of a decarbonization tower in a system for desulfurizing and decarbonizing synthetic gas according to the present invention,

FIG. 9 is a first external view of a reboiler in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 10 is a second external view of a reboiler in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 11 is an axial cross-sectional view of a reboiler in a system for desulfurizing and decarbonizing synthesis gas in accordance with the present invention,

figure 12 is an enlarged view of a portion of figure 11 at C,

FIG. 13 is a radial first cross-sectional view of a reboiler in a system for desulfurizing and decarbonizing a synthesis gas in accordance with the present invention,

FIG. 14 is a radial second cross-sectional view of a reboiler in a syngas desulfurization and decarbonization system of the present invention,

FIG. 15 is a schematic view of a dry desulfurization apparatus in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 16 is an exploded view of a dry desulfurization unit in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 17 is a partial cross-sectional view of a housing of a dry desulfurization device in a syngas desulfurization and decarbonization system of the present invention,

FIG. 18 is a cross-sectional view of the upper end gas tank of the dry desulfurization apparatus in the desulfurization and decarbonization system of synthesis gas according to the present invention,

FIG. 19 is a cross-sectional view of a desulfurization tank of a dry desulfurization device in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 20 is a cross-sectional view of a lower end gas tank of a dry desulfurization apparatus in a system for desulfurizing and decarbonizing a synthesis gas according to the present invention,

FIG. 21 is a horizontal cross-sectional view of the bottom gas tank of the dry desulfurization apparatus in the desulfurization and decarbonization system for synthesis gas according to the present invention,

FIG. 22 is a diagram showing the structure of a gas distribution device of a dry desulfurization device in a desulfurization and decarbonization system for synthetic gas according to the present invention,

FIG. 23 is a diagram of a dry desulfurization device layout system in a desulfurization and decarbonization system for synthesis gas according to the present invention,

FIG. 24 is a schematic view of the reactor of the organic sulfur water machine in the desulfurization and decarbonization system of the synthetic gas according to the present invention,

FIG. 25 is an exploded view of the organic sulfur water machine reactor in the desulfurization and decarbonization system of the synthesis gas according to the present invention,

FIG. 26 is a cross-sectional view of the reactor housing of the organosulfur water machine in the desulfurization and decarbonization system of the present invention,

figure 27 is an enlarged view of a portion of figure 26 at D,

fig. 28 is a side view of fig. 26.

In the figure: 11-first shell, 12-lean liquor inlet pipe, 1201-coil pipe, 13-sieve plate, 14-conical plate, 1401-connecting block, 15-mixing cylinder, 1501-inner cavity, 1502-conical groove, 1503-filler net, 1504-sieve plate group, 16-rich liquor outlet pipe, 17-blocking plate, 1701-floating plate, 18-vertical rod, 1801-limit rod, 19-supporting rod, 110-blow-off pipe, 111-inclined plate, 112-outlet pipe, 113-cooling sleeve, 11301-cooling liquor inlet pipe, 11302-cooling liquor outlet pipe and 114-synthetic gas inlet pipe;

21-second shell, 2101-bearing seat, 22-heat exchange tube, 2201-end tube, 2202-first scraper, 2203-effusion box, 2204-first spray hole, 2205-clasp, 2206-belt pulley, 23-liquid inlet tube, 24-liquid outlet tube, 25-first steam supply tube, 26-steam discharge tube, 27-baffle, 2701-through hole, 28-second scraper, 2801-fixed rod, 29-blow-off tube, 210-synchronous belt, 211-motor, 212-rotary seal;

3-desulfurizing device, 301-air inlet main pipe, 302-air outlet main pipe, 303-first series pipeline, 304-second series pipeline, 31-third shell, 3101-inserting port, 32-first air inlet pipe, 33-first air outlet pipe, 34-desulfurizing tank, 3401-desulfurizing agent placing tank, 3402-convex ring, 3403-buckling tank, 35-filter plate, 36-upper air tank, 3601-first air collecting tank, 37-lower air tank, 3701-second air collecting tank, 38-air distributing device, 3801-top plate, 3802-middle plate, 3803-bottom plate, 3804-first connecting rod, 3805-second connecting rod, 38039-connecting air pipe, 3901-air collecting cavity, 310-blank plate;

41-housing, 4101-conical tube, 4102-replacement port, 4103-first fixing plate, 4104-support ring, 42-second air inlet tube, 43-second air outlet tube, 44-steam ring, 4401-second spray hole, 4402-second steam supply tube, 45-catalyst cartridge, 46-sealing door, 4601-second fixing plate.

Detailed Description

The drawings are preferred embodiments of the system for desulfurizing and decarbonizing synthesis gas, and the present invention will be described in further detail with reference to the accompanying drawings.

The regeneration tower is connected with the reboiler through a pipeline.

The synthetic gas desulfurization and decarbonization system also comprises a synthetic gas buffer tank, a liquid distribution pump, a liquid distribution tank, a submerged pump, an accident tank, a lean solution cooler, an active carbon filter, a liquid separator, a desulfurization heater, a temperature and pressure reduction device, a steam condensate pipe, a steam condensate pump, a raw sulfur cooler, a lean and rich solution heat exchanger, a carbon dioxide cooler and a carbon dioxide shunt. The structure and connection method of each device are all adopted in the prior art.

The decarbonization tower include first casing 11, in this embodiment, first casing 11 adopts cylindrical first casing, and two terminal surfaces are the arcwall face about the first casing 11, and the central point of upper end arcwall face is coaxial through-connection has outlet duct 112, and lower extreme arcwall face central point through-connection has blow off pipe 110, is equipped with the automatically controlled valve on the blow off pipe 110. A plurality of supporting legs are fixed on the outer side of the bottom surface of the first housing 11 for supporting and fixing the first housing 11, and meanwhile, an arrangement space of the drain pipe 110 is reserved.

A coil 1201 is arranged above the inside of the first shell 11, a plurality of spraying holes are formed in the coil 1201, and a lean solution inlet pipe 12 communicated with the coil 1201 is arranged outside the first shell 11. Coil 1201 is a coil, which ensures a coverage area of the coil, while the resistance to flow inside the coil is low, which reduces the kinetic energy loss of the MDEA. The spray hole can be additionally provided with an atomization spray nozzle or a shower nozzle, so that the spray area of MDEA is effectively increased, and the MDEA is fully contacted with the synthesis gas.

In order to further increase the effective contact area between the synthesis gas and the MDEA solution, a plurality of sieve plates 13 are arranged below the coil 1201, a plurality of through holes are formed in the sieve plates 13, the outer diameter of the sieve plates 13 is the same as the inner diameter of the first shell 11, and the MDEA solution is sprayed onto the sieve plates 13 to generate sputtering, so that the density of the MDEA solution in the space between the sieve plates 13 and the coil 1201 is increased. After that, the MDEA solution flows downwards through the through holes on the sieve plate, and the synthesis gas flows upwards through the through holes, so that convection is generated between the MDEA solution and the synthesis gas, and the MDEA solution is contacted with the synthesis gas to decarbonize the synthesis gas.

A plurality of inclined plates 111 are arranged above the coil 1201, the horizontal projection length of the inclined plates 111 is larger than the radius of the first shell 11, the included angle between the inclined plates 111 and the axis of the first shell 11 is smaller than 90 degrees and larger than 60 degrees, two rows of inclined plates 111 are respectively arranged on two sides of the axis of the first shell 11, and the two rows of inclined plates 111 are arranged in a staggered mode. Since the horizontal projection length of the inclined plate 111 is longer than the radius of the first housing 11, the middle positions of the upper and lower inclined plates 111 have overlapping parts, so that the flow path in the process of upward flow of the synthesis gas is in a zigzag shape.

During the upward flow of the synthesis gas, the synthesis gas collides with the inclined plate 111, and liquid substances contained in the synthesis gas are separated, so that a gas-liquid separation function is realized. In order to further improve the effect of gas-liquid separation, in this embodiment, a cooling device is sleeved at a position corresponding to the inclined plate 111 outside the first housing 11, and one end of the inclined plate 111 is in contact with the cold end of the cooling device through the first housing 11 or directly. The cooling device cools the swash plate 111 so that liquid substances in the synthesis gas are condensed more.

In this embodiment, the cooling device is an annular cooling sleeve 113, a cavity is provided in the cooling sleeve 113, and a refrigerant flows in the cavity. The cooling jacket 113 is provided with a cooling liquid inlet pipe 11301 and a cooling liquid outlet pipe 11302 which are communicated with the cooling jacket, and the cooling liquid inlet pipe 11301 is positioned below the cooling liquid outlet pipe 11302.

In order to further improve the direct contact effect of the synthesis gas and the MDEA solution, a conical plate 14 is arranged below the sieve plate 13, and a gap is reserved between the bottom surface of the conical plate 14 and the inner wall of the first shell 11. The MDEA solution flowing down the screen plate 13 is guided by the top surface of the conical plate 14 to flow into the gap between the conical plate 14 and the first housing 11, and then flows down through the gap to form a water curtain. During the upward flow of the synthesis gas, it must pass through the water curtain, thereby providing a direct opportunity for the synthesis gas to contact the MDEA solution.

3-6 connecting blocks 1401 are arranged on the periphery of the bottom surface of the conical plate 14, and the connecting blocks 1401 are arranged in gaps between the conical plate 14 and the inner wall of the first shell 11, and the connecting blocks 1401 fixedly connect the conical plate 14 with the first shell 11.

A mixing cylinder 15 is arranged below the conical plate 14, and the outer diameter of the mixing cylinder 15 is the same as the inner diameter of the first shell 11. The center of the mixing cylinder 15 is provided with an inner cavity 1501 with upper and lower ends open, and a filler net 1503 is arranged at the opening of the upper end of the inner cavity 1501.

The top surface of the mixing cylinder 15 is concavely provided with a conical groove 1502, and the center of the conical groove 1502 is the lowest point. The upper end opening of the inner cavity 1501 is positioned at the center of the conical groove 1502, under the diversion effect of the conical groove 1502, the MDEA solution flows into the upper end opening of the inner cavity 1501, then passes through the packing net 1503, a plurality of through holes are formed in the packing net 1503, the packing net 1503 stretches the MDEA solution to spread the MDEA solution, and then flows down through the through holes, so that the contact opportunity of the synthesis gas and the MDEA solution is provided once.

The lower half of the inner cavity 1501 is a round table, a screen plate group 1504 is arranged in the round table area of the inner cavity 1501, the screen plate group 1504 comprises a plurality of screen plates which are arranged from top to bottom at intervals, and the circumferential surfaces of the screen plates are in contact with the inner wall of the inner cavity 1501 and are fixedly connected. The through holes on each sieve plate are staggered, so that MDEA solution flowing down from the upper sieve plate firstly collides with the lower sieve plate, and the solution generates sputtering to increase the density of the solution in the space between the two sieve plates.

A filler can be filled between two adjacent sieve plates 13, between the sieve plates 13 and the conical plates 14 and between the conical plates 14 and the mixing cylinder 15.

The outside of the first shell 11 is provided with a synthetic gas inlet pipe 114, and a through hole of the synthetic gas inlet pipe 114 and the first shell 11 is positioned below the mixing cylinder 15. The first casing 11 is provided with a rich solution discharge pipe 16 penetrating and connected to the inner cavity thereof, and the rich solution discharge pipe 16 and the first casing 11 are positioned below the synthesis gas intake pipe 114 and the first casing 11.

The through position of the rich liquor discharge pipe 16 and the first shell 11 is positioned on the side wall of the first shell 11, a vertically arranged blocking plate 17 is blocked at the through position of the rich liquor discharge pipe 16 and the first shell 11, and a horizontally arranged floating plate 1701 is fixed on one side of the blocking plate 17 facing the axis of the first shell 11. In order to always locate the liquid surface above the position where the rich liquid discharge pipe 16 and the through-hole of the first casing 11 are opened, the floating plate 1701 is fixedly connected to the upper end surface of the closure plate 17.

Two sides of the blocking plate 17 are respectively provided with a vertical rod 18, the vertical rods 18 are contacted with the side surface of the blocking plate 17 facing the axis of the first shell 11, the bottom of each vertical rod 18 is fixedly connected with the bottom surface of the first shell 11, the top of each vertical rod 18 is provided with a limiting rod 1801, and the limiting rods 1801 are positioned above the blocking plate 17. The two vertical rods 18 enable the blocking plate 17 to only move up and down and not move along the radial direction of the first shell 11, so that the sealing effect of the blocking plate 17 is ensured. Meanwhile, the floating plate 1701 is positioned between the two vertical rods 18, and the side surface of the floating plate is contacted with the vertical rods 18, so that the shaking of the blocking plate 17 is effectively avoided.

The bottom of the floating plate 1701 is provided with a plurality of supporting rods 19, and the bottoms of the supporting rods 19 are fixedly connected with the bottom surface of the first shell 11.

The bottom of the first shell 11 is provided with a drain pipe 110, and the through connection part between the drain pipe 110 and the interior of the first shell 11 is positioned on the bottom surface of the first shell 11.

The reboiler comprises a second shell 21, wherein the second shell 21 is cylindrical in shape, and a plurality of supporting legs are arranged below the second shell 21. The second casing 21 is internally provided with a heat exchange tube 22, two ends of the heat exchange tube 22 are respectively coaxially and penetratingly connected with an end tube 2201, the inner diameter of the end tube 2201 is smaller than that of the heat exchange tube 22, and the penetration joint of the end tube 2201 and the heat exchange tube 22 is provided with an arc transition.

The end of the end tube 2201 is inserted outside the second housing 21, one ends of the liquid inlet tube 23 and the liquid outlet tube 24 are inserted inside the end tube 2201, and the two end tubes 2201 are coaxially rotated and connected with the liquid inlet tube 23 and the liquid outlet tube 24 respectively. The liquid inlet pipe 23 is connected with the bottom of the regeneration tower in a penetrating way, the liquid outlet pipe 24 is connected with the side wall of the regeneration tower in a penetrating way, and the liquid inlet pipe 23 and the liquid outlet pipe 24 are respectively provided with an electric control valve.

In order to increase the tightness between the liquid inlet pipe 23 and the liquid outlet pipe 24 and the end pipe 2201, a rotary seal 212 is disposed between the outer wall of the liquid inlet pipe 23 and the inner wall of the corresponding end pipe 2201, and between the outer wall of the liquid outlet pipe 24 and the inner wall of the corresponding end pipe 2201, and the rotary seal 212 is in the prior art.

When the heat exchange tube is used, the end tube 2201 rotates, in order to reduce friction force between the end tube 2201 and the second shell 21, bearing seats 2101 coaxially arranged with the heat exchange tubes 22 are arranged outside two sides of the second shell 21, the end tube 2201 is arranged inside the bearing seats 2101 in a penetrating mode, and bearings are arranged between the outer walls of the end tube 2201 and the inner walls of the bearing seats 2101.

The end pipe 2201 is located on the inner circumferential surface of the second shell 21 and is sleeved with a clamping ring 2205, the clamping ring 2205 is in contact with the inner wall of the second shell 21, and the clamping ring 2205 effectively prevents the heat exchange pipe 22 from moving.

The inner wall of the heat exchange tube 22 is convexly provided with a plurality of first scraping plates 2202, the first scraping plates 2202 are axially arranged along the heat exchange tube 22, the length of the first scraping plates 2202 is the same as the length of the inner cavity of the heat exchange tube 22, and the height of the first scraping plates 2202 is smaller than the radius of the inner cavity of the heat exchange tube 22. The first scraping plates 2202 are distributed in an annular array around the axis of the heat exchange tube 22, and when the heat exchange tube 22 rotates, the first scraping plates 2202 can drive the liquid in the heat exchange tube to rotate, so that centrifugal force is generated, and the liquid is tightly attached to the inner wall of the heat exchange tube 22.

In order to realize that the heat exchange tube 22 can rotate during use, three methods can be adopted:

the method comprises the following steps: the heat exchange tube 22 and the liquid inlet tube 23 are covered with a cylindrical liquid accumulation box 2203, a plurality of first spray holes 2204 are arranged on the circumferential surface of the liquid accumulation box 2203, and the first spray holes 2204 are used for connecting the inside of the liquid accumulation box 2203 with the inside of the heat exchange tube 22.

The first spray holes 2204 are distributed in an annular array around the axis of the heat exchange tube 22, and the axis of the first spray holes 2204 is not coincident with the radial line of the effusion cell 2203. The liquid ejected from the first nozzle 2204 reversely pushes the heat exchange tube 22, so that the heat exchange tube 22 rotates. The liquid ejected from the first nozzle 2204 impinges on the first scraper 2202, further increasing the pushing force, and rotating the heat exchange tube 22.

The second method is as follows: the belt pulley 2206 is sleeved on the part of one end tube 2201, which is positioned outside the second shell 21, the motor 211 is fixed outside the second shell 21, and the synchronous belt 210 is sleeved between the output shaft of the motor 211 and the belt pulley 2206, so that the motor 211 can drive the belt pulley 2206 to rotate, and further drive the heat exchange tube 22 to rotate.

And a third method: two mechanisms of the first method and the second method are simultaneously arranged.

The second shell 21 is internally provided with a second scraper 28 which is arranged in parallel with the axis of the heat exchange tube 22, the end surface of the second scraper 28 is contacted with the outer wall of the heat exchange tube 22, and the second scraper 28 is fixedly connected with the inner wall of the second shell 21 through a fixed rod 2801. The second scraper 28 cleans the outer wall of the heat exchange tube 22 during rotation thereof.

The second casing 21 is provided with a first steam supply pipe 25 and a steam discharge pipe 26 connected to the outside of the second casing.

The first steam supply pipe 25 and the steam discharge pipe 26 are located at both ends of the circumferential surface of the second casing 21, and the axes of the first steam supply pipe 25, the steam discharge pipe 26 and the second casing 1 are located in the same plane.

The first steam supply pipe 25 is located at one side of the liquid outlet pipe 24, and the steam discharge pipe 26 is located at one side of the liquid inlet pipe 23.

The central part of the outer part of the heat exchange tube 22 is sleeved with an annular baffle plate 27, the inner diameter of the baffle plate 27 is the same as the outer diameter of the heat exchange tube 22, and the outer diameter is the same as the inner diameter of the second shell 21. The partition plate 27 is provided with a through hole 2701, and in this embodiment, the through hole 2701, the first steam supply pipe 25 and the steam discharge pipe 26 are located on both sides of the axis of the second casing 21, respectively.

The bottom of the second shell 1 is positioned on two sides of the partition plate 27 and is respectively and through-connected with a drain pipe 29, and a stop valve is arranged on the drain pipe 29.

The desulfurization device 3 comprises a third shell 31, wherein an upper end air groove 36 and a lower end air groove 37 are respectively fixed on the upper side and the lower side of the inside of the third shell 31, and a desulfurization groove 34 is slidably arranged between the upper end air groove 36 and the lower end air groove 37. The upper end gas tank 36 and the lower end gas tank 37 are in close contact with the desulfurization tank 34, so that the synthesis gas is prevented from flowing out of gaps between the upper end gas tank 36 and the lower end gas tank 37 and the desulfurization tank 34.

The horizontal cross-sectional shapes of the desulfurization tank 34, the upper end gas tank 36 and the lower end gas tank 37 are rectangular with the same size.

The third housing 31 has an insertion port 3101 formed in a side surface thereof, and a cover plate 310 is provided on the insertion port 3101, the cover plate 310 being fixedly connected to the third housing 31 by bolts. After removing the shutter 310, the desulfurization tank 34 can be moved to the outside of the third housing 31 through the insertion port 3101 to exchange the desulfurizing agent.

The desulfurizing tank 34 is provided with a plurality of desulfurizing agent placing grooves 3401, the desulfurizing agent placing grooves 3401 can be rectangular or circular, and in order to increase the storage amount of the desulfurizing agent, the shape of the desulfurizing agent placing grooves 3401 in the embodiment is rectangular.

The desulfurizing agent standing groove 3401 both sides all be equipped with the opening, the opening inboard is protruding to be equipped with the bulge loop 3402, filter plate 35 sets up in bulge loop 3402 top. The desulfurizing agent placing groove 3401 is internally filled with desulfurizing agent, the desulfurizing agent is placed between the two filter plates 35, and the diameter of the desulfurizing agent is larger than the diameter of the filter holes on the filter plates 35. In this example, zinc oxide was used as the desulfurizing agent.

The end surface of the desulfurization groove 34 opposite to the insertion opening 3201 is concavely provided with a fastening groove 3403. Tools such as hooks can be inserted into the buckle groove 3403, so that the movement of the desulfurization groove 34 can be assisted.

The upper end air tank 36 is provided with first air collecting tanks 3601 which are the same in number as the desulfurizing agent placing tanks 3401 and are oppositely arranged, and the lower end air tank 37 is provided with second air collecting tanks 3701 which are the same in number as the desulfurizing agent placing tanks 3401 and are oppositely arranged.

The opening sizes of the first gas collecting channel 3601 and the second gas collecting channel 3701 are smaller than or equal to the opening size of the desulfurizing agent placing channel 3401, namely, the opening of the desulfurizing agent placing channel 3401 is overlapped with the opening of the first gas collecting channel 3601 and the opening of the second gas collecting channel 3701, or the opening of the desulfurizing agent placing channel 3401 is sleeved outside the opening of the first gas collecting channel 3601 and the opening of the second gas collecting channel 3701. So that the synthesis gas flowing out of the desulfurizing agent placing groove 3401 can only flow into the first gas collecting groove 3601 or the second gas collecting groove 3701 corresponding to the synthesis gas, and no series flow occurs.

In order to facilitate that the first air inlet pipe 32 and the first air outlet pipe 33 are located above the third casing 31, in this embodiment, the number of the desulfurizing agent placement groove 3401, the first air collecting groove 3601 and the second air collecting groove 3701 is even.

The first air collecting tank 3601 of the upper air tank 36 is connected with a first air inlet pipe 32 in a penetrating way, and the first air inlet pipe 32 penetrates the outside of the third shell 31.

The upper end air tank 36 is provided with a connecting air pipe 39 except for the first air tank 3601 and the inside of the first air tanks 3601 with the odd number, and the air inlet end of the connecting air pipe 39 is in through connection with the first air tank 3601 at the front end of the first air tank 3601.

The second gas collection grooves 3701 arranged even in number on the lower gas collection groove 37 are each provided with a connecting gas pipe 39, and the gas inlet end of the connecting gas pipe 39 is connected to the second gas collection groove 3701 at the front end of the second gas collection groove 3701.

Meanwhile, the inlet end of the connecting air pipe 39 is provided with an air collecting cavity 3901 which is communicated with the air collecting cavity, the horizontal section of the air collecting cavity 3901 is isosceles trapezoid, and the air collecting cavity 3901 is communicated with the connecting air pipe 39 and the first air collecting groove 3601 or the second air collecting groove 3701.

The third casing 31 is provided with a first exhaust pipe 33 outside, and the first exhaust pipe 33 is connected to one of the first air collection tank 3601 at the end of the upper air tank 36 or the second air collection tank 3701 at the end of the lower air tank 37, in which the connection air pipe 39 is not provided.

For example, if the number of the desulfurizing agent placement groove 3401, the first gas collection groove 3601 and the second gas collection groove 3701 is 4, the 3 rd first gas collection groove 3601 on the upper gas tank 36 is provided with the connecting gas pipe 39 inside, and the gas inlet end of the connecting gas pipe 39 is connected with the 2 nd first gas collection groove 3601.

The 2 nd and 4 th second gas collecting grooves 3701 of the lower gas tank 37 are provided with connecting gas pipes 39, and the 1 st and 3 rd second gas collecting grooves 3701 of the gas inlet end of the connecting gas pipes 39 are connected in a penetrating manner.

The third casing 31 is provided with a first exhaust pipe 33 outside, and the first exhaust pipe 33 is connected to the 4 th upper end air tank 36.

In order to increase the gas flow width of the synthesis gas, the connecting gas pipe 39 consists of a horizontal pipe and a right-angle elbow, two ends of the horizontal pipe are respectively and penetratingly connected with the gas collecting cavity 3901 and the elbow,

the axis of the elbow outlet coincides with the center line of the first gas collecting tank 3601 or the second gas collecting tank 3701, and the elbow outlet faces the desulfurization tank 34.

An air distribution device 38 is arranged between the elbow of the connecting air pipe 39 and the desulfurization tank 34.

The gas distribution device 38 includes a top plate 3801, a plurality of intermediate plates 3802, and a plurality of bottom plates 3803. The top plate 3801 axis coincides with the elbow outlet axis of the connecting air tube 39, and the top plate 3801 diameter is equal to or greater than the elbow outlet diameter.

The top plate 3801, the middle plate 3802 and the bottom plate 3803 are all circular plates, the top plate 3801, the middle plate 3802 and the bottom plate 3803 are sequentially arranged in three layers, the top plate 3801 is positioned at one end of the connecting air pipe 39, and the bottom plate 3803 is positioned at one end of the desulfurization tank 34.

The top plate 3801, the middle plate 3802 and the bottom plate 3803 are all circular plates with equal diameters, and a plurality of through holes are formed in the bottom plate 3803.

The plurality of middle plates 3802 and the plurality of bottom plates 3803 are distributed in an annular array around the axis of the top plate 3801, a distance between the axis of the middle plate 3802 and the axis of the top plate 3801 is greater than or equal to a diameter of the top plate 3801, and a distance between the axis of the bottom plate 3803 and the axis of the middle plate 3803 is greater than or equal to a diameter of the top plate 3801.

The distance between the axis of the bottom plate 3803 and the axis of the top plate 3801 is greater than the distance between the axis of the middle plate 3802 and the axis of the top plate 3801.

The top plate 3801, the middle plate 3802 and the bottom plate 3803 are fixedly connected by a first connecting rod 3804.

The air distribution device 38 is fixedly connected with the upper air groove 36 or the lower air groove 37 through the second connecting rod 3805. The second connecting rod 3805 has one end fixedly connected to the inner wall of the upper end air groove 36 or the lower end air groove 37 and the other end fixedly connected to the top plate 3801 or the middle plate 3802 or the bottom plate 3803 or several plates together.

Each group comprises two desulfurization units 3, the first air inlet pipe 32 of each desulfurization unit 3 is commonly connected with an air inlet main pipe 301, and the first air outlet pipe 33 of each desulfurization unit 3 is commonly connected with an air outlet main pipe 302. A first series pipeline 303 is arranged between the first exhaust pipe 33 of the desulfurization device A and the first intake pipe 32 of the desulfurization device B, and a second series pipeline 304 is arranged between the first intake pipe 32 of the desulfurization device A and the first exhaust pipe 33 of the desulfurization device B.

The first intake pipe 32 and intake manifold 301 interface, the first exhaust pipe 33 and exhaust manifold 302 interface, the first serial pipeline 303 and the second serial pipeline 304 are all provided with stop valves. By adjusting the on-off state of each stop valve, two desulfurization devices can be connected in series and in parallel.

When the desulfurization units are connected in parallel, one of the desulfurization units 3 can be stopped, and the desulfurization agent can be replaced. When the two desulfurizing devices 3 are connected in series, the front and back positions of the two desulfurizing devices can be adjusted, and the front desulfurizing agent is replaced.

The organic sulfur hydrolysis reactor comprises a cylindrical shell 41, wherein the upper end and the lower end of the shell 41 are respectively connected with a second air inlet pipe 42 and a second air outlet pipe 43 in a penetrating way, and the shell 41, the second air inlet pipe 42 and the second air outlet pipe 43 are coaxially arranged. In order to avoid air blockage during the exhaust, the bottom of the housing 41 is a tapered tube 4101, the diameter of the upper opening of the tapered tube 4101 is larger than that of the lower opening, and the second exhaust pipe 43 is connected with the lower opening of the tapered tube 4101 in a penetrating way.

The inside of the outer shell 41 is provided with a plurality of catalyst boxes 45, and the catalyst boxes 45 are cylindrical in shape, and the outer diameter of the catalyst boxes is the same as the inner diameter of the outer shell 41. In order to further increase the sealing effect, the synthesis gas is prevented from flowing out of the gap between the catalyst box 45 and the housing 41, and a sealing ring or an annular rubber sleeve is sleeved on the circumferential surface of the catalyst box 45. The bottom surface of the catalyst case 45 is provided with a through hole, and the inside of the catalyst case 45 is filled with an organic sulfur hydrolysis catalyst. The upper end of the catalyst box 45 is arranged in an open way, or a filter plate with a through hole is paved at the upper end. If the filter plates are laid, the filter plates can be disassembled, so that the organic sulfur catalyst in the catalyst box 45 can be replaced conveniently.

An annular steam ring 44 is arranged above the catalyst box 45, a cavity is formed in the steam ring 44, a plurality of second spray holes 4401 are formed in the steam ring 44, the second spray holes 4401 are opened towards the inner area of the steam ring 44, and the axes of the second spray holes 4401 are horizontally arranged or obliquely upwards arranged. The outer case 41 is provided with a second steam supply pipe 4402 penetrating and connected to the cavity inside the steam ring 44.

The steam ring 44 has the same outer diameter as the inner diameter of the casing 41 or is larger than the inner diameter of the casing 41 and smaller than the outer diameter of the casing 41, so that the synthesis gas passes through the middle of the steam ring 44 and is mixed with the steam sprayed from the second spray holes 4401.

In this embodiment, the catalyst cartridge 45 can be taken out from the inside of the housing 41. The catalyst cartridge 45 is thus slidably connected to the housing 41. A support ring 4104 is supported below the catalyst box 45, and the support ring 4104 is fixedly connected with the inner wall of the housing 41.

The shell 41 is provided with a replacement port 4102 at a position corresponding to the catalyst box 45, the radian of the opening of the replacement port 4102 is more than or equal to 180 degrees, and a sealing door 46 is covered on the replacement port 4102. The first fixing plate 4103 is protruded on both sides of the replacing port 4102, the second fixing plate 4601 is protruded on both ends of the sealing door 46, and the first fixing plate 4103 is fastened with the second fixing plate 4601 by bolts.

In order to increase the sealing effect of the sealing door 46, a sealing groove is concavely formed in the end surface of the sealing door 46, which is in contact with the replacement port 4102, and a sealing ring is arranged in the sealing groove.

An air distribution device 38 is arranged between the second air inlet pipe 42 and the uppermost steam ring 44 inside the shell 41.

The air distribution device 38 includes a top plate 3801, a plurality of middle plates 3802 and a plurality of bottom plates 3803, wherein the axis of the top plate 3801 coincides with the axis of the second air inlet pipe 42.

The top plate 3801, the middle plate 3802 and the bottom plate 3803 are all circular plates, the top plate 3801, the middle plate 3802 and the bottom plate 3803 are sequentially arranged in three layers, the top plate 3801 is located at one end of the second air inlet pipe 42, and the bottom plate 3803 is located at one end of the steam ring 44.

The air distribution device 38 is fixedly connected to the housing 41 by a second connecting rod 3805.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. The utility model provides a synthetic gas desulfurization decarbonization system which characterized in that:

comprises a decarbonization tower, a regeneration tower, a reboiler, an organic sulfur hydrolysis reactor and a dry desulfurization device,

The lower end of the decarbonization tower is provided with a synthetic gas inlet pipe (114), an air outlet pipe (112) at the upper end of the decarbonization tower is connected with the organic sulfur hydrolysis reactor and the dry desulfurization device in sequence through pipelines,

the regeneration tower is connected with the reboiler through a pipeline,

the lean liquid outlet at the lower end of the regeneration tower is connected with the lean liquid of the decarbonization tower through a pipeline, the rich liquid inlet at the upper end of the regeneration tower is connected with the rich liquid discharge pipe (16) of the decarbonization tower through a pipeline, the reboiler is connected with the regeneration tower through a pipeline,

the decarbonization tower comprises a first shell (11), a coil pipe (1201) is arranged above the inside of the first shell (11), a plurality of spraying holes are arranged on the coil pipe (1201), a lean solution inlet pipe (12) which is communicated with the coil pipe (1201) is arranged outside the first shell (11),

a plurality of sieve plates (13) are arranged below the coil pipe (1201),

the outside of the first shell (11) is provided with a synthetic gas inlet pipe (114), the through holes of the synthetic gas inlet pipe (114) and the first shell (11) are positioned below the sieve plate (13),

the outside of the first shell (11) is provided with a rich liquor discharge pipe (16) communicated with the inner cavity of the first shell, the through hole of the rich liquor discharge pipe (16) and the first shell (11) is positioned below the through hole of the synthesis gas inlet pipe (114) and the first shell (11),

A plurality of inclined plates (111) are arranged above the coil pipe (1201), the horizontal projection length of the inclined plates (111) is larger than the radius of the first shell (11), the included angle between the inclined plates (111) and the axis of the first shell (11) is smaller than 90 degrees, two sides of the axis of the first shell (11) are respectively provided with a row of inclined plates (111), the two rows of inclined plates (111) are arranged in a staggered way,

the top surface of the first shell (11) is connected with an air outlet pipe (112) in a penetrating way,

the cooling device is sleeved at the position outside the first shell (11) corresponding to the sloping plate (111), one end of the sloping plate (111) is contacted with the cooling device through the first shell (11) or directly,

the cooling device is an annular cooling sleeve (113), a cavity is arranged in the cooling sleeve (113), refrigerant flows in the cavity,

the cooling sleeve (113) is externally provided with a cooling liquid inlet pipe (11301) and a cooling liquid outlet pipe (11302) which are communicated with the cooling sleeve, and the cooling liquid inlet pipe (11301) is positioned below the cooling liquid outlet pipe (11302).

2. The system for desulfurizing and decarbonizing synthesis gas according to claim 1, wherein:

a conical plate (14) is arranged below the sieve plate (13), a gap is reserved between the bottom surface of the conical plate (14) and the inner wall of the first shell (11),

3-6 connecting blocks (1401) are arranged on the periphery of the bottom surface of the conical plate (14), the connecting blocks (1401) fixedly connect the conical plate (14) with the first shell (11),

a mixing cylinder (15) is arranged below the conical plate (14), the outer diameter of the mixing cylinder (15) is the same as the inner diameter of the first shell (11),

an inner cavity (1501) with both upper and lower ends open is arranged in the center of the mixing cylinder (15), a filler net (1503) is arranged at the open position of the upper end of the inner cavity (1501),

the lower half part of the inner cavity (1501) is in a round table shape, a sieve plate group (1504) is arranged in the round table-shaped area of the inner cavity (1501), the sieve plate group (1504) comprises a plurality of sieve plates which are arranged from top to bottom at intervals, and the circumferential surfaces of the sieve plates are in contact with the inner wall of the inner cavity (1501) and are fixedly connected.

3. The system for desulfurizing and decarbonizing synthetic gas according to claim 1 or 2, wherein:

the through position of the rich liquor discharge pipe (16) and the first shell (11) is positioned on the side wall of the first shell (11), a vertically arranged blocking plate (17) is blocked at the through position of the rich liquor discharge pipe (16) and the first shell (11), a horizontally arranged floating plate (1701) is fixed at one side of the blocking plate (17) facing the axis of the first shell (11),

Two sides of the blocking plate (17) are respectively provided with a vertical rod (18), the vertical rods (18) are contacted with the side surface of the blocking plate (17) facing the axis of the first shell (11), the bottom of each vertical rod (18) is fixedly connected with the bottom surface of the first shell (11), the top of each vertical rod (18) is provided with a limiting rod (1801), the limiting rods (1801) are positioned above the blocking plate (17),

the bottom of the floating plate (1701) is provided with a plurality of supporting rods (19), and the bottoms of the supporting rods (19) are fixedly connected with the bottom surface of the first shell (11).

4. The system for desulfurizing and decarbonizing synthetic gas according to claim 1, wherein:

the reboiler comprises a second shell (21), a heat exchange tube (22) is arranged in the second shell (21), two ends of the heat exchange tube (22) are respectively coaxially and penetratingly connected with an end tube (2201), the inner diameter of the end tube (2201) is smaller than that of the heat exchange tube (22),

the end pipes (2201) are penetrated outside the second shell (21), the two end pipes (2201) are respectively connected with the liquid inlet pipe (23) and the liquid outlet pipe (24) in a coaxial rotation way, the liquid inlet pipe (23) is connected with the bottom of the regeneration tower in a through way, the liquid outlet pipe (24) is connected with the side wall of the regeneration tower in a through way, the liquid inlet pipe (23) and the liquid outlet pipe (24) are respectively provided with an electric control valve,

A second scraping plate (28) which is arranged in parallel with the axis of the heat exchange tube (22) is arranged in the second shell (21), the end surface of the second scraping plate (28) is contacted with the outer wall of the heat exchange tube (22), the second scraping plate (28) is fixedly connected with the inner wall of the second shell (21) through a fixed rod (2801),

the second housing (21) is provided with a first steam supply pipe (25) and a steam discharge pipe (26) which are connected to the outside of the second housing in a penetrating manner.

5. The system for desulfurizing and decarbonizing synthesis gas according to claim 4, wherein:

the first steam supply pipe (25) and the steam discharge pipe (26) are respectively positioned at the two ends of the circumferential surface of the second shell (21), the axes of the first steam supply pipe (25), the steam discharge pipe (26) and the second shell (21) are positioned in the same plane,

the first steam supply pipe (25) is positioned at one side of the liquid outlet pipe (24), the steam discharge pipe (26) is positioned at one side of the liquid inlet pipe (23),

a liquid accumulation box (2203) is covered at the through hole of the heat exchange tube (22) and the liquid inlet tube (23), a plurality of first spray holes (2204) are arranged on the circumferential surface of the liquid accumulation box (2203), the first spray holes (2204) are used for connecting the inside of the liquid accumulation box (2203) with the inside of the heat exchange tube (22),

The first spray holes (2204) are distributed in an annular array around the axis of the heat exchange tube (22), and the axis of the first spray holes (2204) is not coincident with the radial line of the effusion box (2203).

6. The system for desulfurizing and decarbonizing synthesis gas according to claim 1, wherein:

the dry desulfurization device comprises a third shell (31), wherein the upper end air groove (36) and the lower end air groove (37) are respectively fixed on the upper side and the lower side of the inside of the third shell (31), a desulfurization groove (34) is arranged between the upper end air groove (36) and the lower end air groove (37) in a sliding way,

an insertion opening (3101) is arranged on the side surface of the third shell (31), the desulfurization groove (34) moves to the outside of the third shell (31) through the insertion opening (3101), a blank (310) is covered on the insertion opening (3101),

a plurality of desulfurizing agent placing grooves (3401) are arranged on the desulfurizing groove (34), a filter plate (35) is respectively arranged at the upper end and the lower end of the desulfurizing agent placing groove (3401), desulfurizing agents are filled in the desulfurizing agent placing grooves (3401),

the upper end air groove (36) is provided with first air collecting grooves (3601) which are the same as the desulfurizing agent placing grooves (3401) in number and are oppositely arranged, the lower end air groove (37) is provided with second air collecting grooves (3701) which are the same as the desulfurizing agent placing grooves (3401) in number and are oppositely arranged,

A first air collecting groove (3601) on the upper end air groove (36) is connected with a first air inlet pipe (32) in a penetrating way, the first air inlet pipe (32) is penetrated outside the third shell (31),

the upper end air groove (36) is provided with connecting air pipes (39) except the first air collecting groove (3601) and the inside of other odd first air collecting grooves (3601), the air inlet end of the connecting air pipes (39) is in through connection with the first air collecting groove (3601) at the front end of the first air collecting groove (3601),

the inside of the second gas collecting grooves (3701) which are even arranged on the lower gas collecting groove (37) is provided with connecting gas pipes (39), the gas inlet end of the connecting gas pipes (39) is in through connection with the second gas collecting grooves (3701) at the front end of the second gas collecting groove (3701),

a first exhaust pipe (33) is arranged outside the third shell (31), and the first exhaust pipe (33) is connected with one of a first gas collecting tank (3601) at the tail end of an upper end gas tank (36) or a second gas collecting tank (3701) at the tail end of a lower end gas tank (37) without a connecting gas pipe (39) in a penetrating way.

7. The system for desulfurizing and decarbonizing synthesis gas according to claim 6, wherein:

the inlet end of the connecting air pipe (39) is provided with an air collecting cavity (3901) which is communicated with the connecting air pipe, the horizontal section of the air collecting cavity (3901) is isosceles trapezoid, and the air collecting cavity (3901) is communicated with the connecting air pipe (39) and the first air collecting groove (3601) or the second air collecting groove (3701).

8. The system for desulfurizing and decarbonizing synthesis gas according to claim 1, wherein:

the organic sulfur hydrolysis reactor comprises a cylindrical shell (41), the upper end and the lower end of the shell (41) are respectively connected with a second air inlet pipe (42) and a second air outlet pipe (43) in a penetrating way,

a plurality of catalyst boxes (45) are arranged in the shell (41), through holes are arranged on the bottom surface of the catalyst boxes (45), organic sulfur hydrolysis catalysts are filled in the catalyst boxes (45),

an annular steam ring (44) is arranged above the catalyst box (45), a plurality of second spray holes (4401) are arranged on the steam ring (44), a second steam supply pipe (4402) which is communicated with the steam ring (44) is arranged outside the shell (41),

the bottom of the shell (41) is a conical tube (4101), the diameter of the opening at the upper end of the conical tube (4101) is larger than that of the opening at the lower end of the conical tube, and the second exhaust tube (43) is in through connection with the opening at the lower end of the conical tube (4101).

9. The system for desulfurizing and decarbonizing synthesis gas according to claim 8, wherein:

a support ring (4104) is supported below the catalyst box (45), the support ring (4104) is fixedly connected with the inner wall of the shell (41),

the shell (41) and the catalyst box (45) are provided with a replacement port (4102) at the corresponding position, the radian of the replacement port (4102) is more than or equal to 180 degrees,

The upper cover of the replacement port (4102) is provided with a sealing door (46),

the two sides of the replacement opening (4102) are convexly provided with a first fixing plate (4103), the two ends of the sealing door (46) are convexly provided with a second fixing plate (4601),

the first fixing plate (4103) and the second fixing plate (4601) are connected by bolt fastening.