CN113717758A

CN113717758A - Synthetic gas desulfurization and decarbonization system

Info

Publication number: CN113717758A
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: 2021-11-30
Anticipated expiration: 2041-08-27
Also published as: CN113717758B

Abstract

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

Description

Synthetic gas desulfurization and decarbonization system

Technical Field

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

Background

The coal hydrogen production is a main process path for hydrogen production, and raw material gas for the coal hydrogen production, namely synthesis gas contains carbon dioxide, sulfide and the like, and needs to be removed.

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

The MDEA solution absorbing the CO2 is called rich solution, the rich solution is sent to a normal decomposition tower after throttling flash evaporation, and the non-condensable gas after flash evaporation is discharged after temperature reduction and separation. The rich solution enters a normal decomposition tower to be fully contacted with stripping steam from bottom to top so as to resolve partial acid gases such as CO2 in the rich solution, a primary regenerated solution is called a semi-barren solution, the semi-barren solution from the normal decomposition tower is pressurized by a booster pump and then divided into two parts, one part of the semi-barren solution is cooled and then pressurized by a semi-barren solution pump and then sent back to the middle part of an absorption tower to be circulated, and the other part of the semi-barren solution is subjected to heat exchange with the barren solution through a barren and rich solution heat exchanger and then enters a regeneration tower. The semi-barren solution is fully contacted with reversely flowing stripping steam from top to bottom through a regeneration tower to resolve acid gases such as CO2 in the semi-barren solution and enter a normal decomposition tower, and the regenerated barren solution enters the top of an absorption tower for circulation after being subjected to heat exchange and temperature reduction and then being pressurized by a barren solution pump. Acid gas desorbed from the normal decomposition tower is cooled and separated and then is discharged outside, and separated liquid is pressurized by a recovery pump and then returns to the flash tank for circulation. The heat source for the regeneration column is provided by low pressure steam from outside the world, and the regeneration column is a typical stripping column.

And a solution filter is arranged at an outlet of the lean liquid pump and the semi-lean liquid pump to perform on-line filtration of partial solution so as to ensure the cleanliness of the lean liquid. In order to facilitate the preparation of MDEA solution, the adjustment of water balance of the system and the recovery of MEDA solution during parking, the system is provided with an underground storage tank and a solution storage tank. In order to prevent the foaming of amine liquid system and quick defoaming when foaming, the system sets up the defoaming agent storage tank.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the invention overcomes the defects of the prior art and provides a synthesis gas desulfurization and decarburization system. The outer wall of the heat exchange tube of the reboiler is not easy to scale, and good heat exchange efficiency can be kept all the time.

The technical scheme adopted by the invention for solving the problems in the prior art is as follows:

the system for desulfurizing and decarbonizing synthetic gas comprises a decarbonizing tower, a regenerating tower, a reboiler, an organic sulfur hydrolysis reactor and a dry desulfurizing device.

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

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

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

Preferably, the decarbonization 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 communicated 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 the synthetic gas inlet pipe and the through hole of the first shell are positioned below the sieve plate.

And a rich liquid discharge pipe communicated with the inner cavity of the first shell is arranged outside the first shell, and the rich liquid discharge pipe and the through hole of the first shell are positioned below the synthetic gas inlet pipe and the through hole of the first shell.

The coil pipe top is equipped with a plurality of swash plate, and the horizontal projection length of swash plate is greater than first casing radius, and the contained angle between swash plate and the first casing axis is less than 90, and first casing axis both sides are equipped with one row of swash plate respectively, and two rows of swash plate are crisscross each other and arrange.

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

The position of the outer part of the first shell corresponding to the inclined plate is sleeved with a cooling device, 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 arranged in the cooling sleeve, and a refrigerant flows in the cavity.

And a cooling liquid inlet pipe and a cooling liquid outlet pipe which are communicated with the cooling sleeve are arranged outside 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 conical plate bottom surface is equipped with 3 ~ 6 connecting blocks, and the connecting block is with conical plate and first casing fixed connection.

And a 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 barrel is provided with an inner cavity with upper and lower ends arranged in an open mode, and a filler net is arranged at the position of the opening at the upper end of the inner cavity.

The lower half part of the inner cavity is in a circular truncated cone shape, a sieve plate group is arranged in the circular truncated cone shape 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 surface of each sieve plate is in contact with the inner wall of the inner cavity and is fixedly connected with the inner wall of the inner cavity.

Preferably, the through part of the rich liquid discharge pipe and the first shell is located on the side wall of the first shell, the through hole of the rich liquid discharge pipe and the first shell is blocked by a blocking plate which is vertically arranged, and one side of the blocking plate facing the axis of the first shell is fixedly provided with a floating plate which is horizontally arranged.

The two sides of the blocking plate are respectively provided with a vertical rod, the vertical rods are in contact with the side faces of the blocking plate facing to the axis of the first shell, the bottom of each vertical rod is fixedly connected with the bottom face of the first shell, the top of each vertical rod is provided with a limiting rod, and each limiting rod is located above the corresponding 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 includes the second casing, is equipped with the heat exchange tube in the second casing, and the coaxial through connection has an end pipe respectively in heat exchange tube both ends, and the end pipe internal diameter is less than the heat exchange tube internal diameter.

The end pipe is worn to establish to the second casing outside, and two end pipes rotate with feed liquor pipe and drain pipe coaxial respectively and are connected, feed liquor pipe and regeneration tower bottom through connection, drain pipe and regeneration tower lateral wall through connection all are equipped with electric control valve on feed liquor pipe and the drain pipe.

The second casing is internally provided with a second scraper blade which is arranged in parallel with the axis of the heat exchange tube, the end face of the second scraper blade is in contact with the outer wall of the heat exchange tube, and the second scraper blade is fixedly connected with the inner wall of the second casing through a fixed rod.

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

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

The 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 heat exchange tube and the liquid inlet tube through hole are covered with a liquid accumulation box, the circumference of the liquid accumulation box is provided with a plurality of spray holes, and the spray holes are used for connecting the inside of the liquid accumulation box and the inside of the heat exchange tube in a through way.

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

Preferably, the dry desulfurization device comprises a third shell, wherein an upper end gas groove and a lower end gas groove are respectively fixed on the upper side and the lower side in the third shell, and a desulfurization groove is arranged between the upper end gas groove and the lower end gas groove in a sliding manner.

The side surface of the third shell is provided with an insertion opening, the desulfurization tank can be moved to the outside of the third shell through the insertion opening, and a blank plate is covered on the insertion opening.

The desulfurizing device is characterized in that a plurality of desulfurizing agent placing grooves are formed in the desulfurizing groove, a filter plate is arranged at each of the upper end and the lower end of each desulfurizing agent placing groove, and the desulfurizing agents are filled in the desulfurizing agent placing grooves.

The upper end gas groove is provided with first gas collecting grooves which are the same as the desulfurizer placing grooves in quantity and are arranged oppositely, and the lower end gas groove is provided with second gas collecting grooves which are the same as the desulfurizer placing grooves in quantity and are arranged oppositely.

First gas collecting tank through connection has first intake pipe on the upper end gas duct, and first intake pipe wears to establish to the third casing outside.

The gas collecting grooves at the upper end are all provided with connecting gas pipes except the first gas collecting groove and inside the other odd-numbered first gas collecting grooves, and the gas inlet ends of the connecting gas pipes are communicated with the first gas collecting grooves at the front ends of the first gas collecting grooves.

And the gas inlet end of the connecting gas pipe is communicated with the second gas collecting groove at the front end of the second gas collecting groove.

And a first exhaust pipe is arranged outside the third shell and is communicated with one of the first gas collecting groove at the tail end of the upper gas collecting groove or the second gas collecting groove at the tail end of the lower gas collecting groove which is not provided with a connecting gas pipe.

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

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 exhaust pipe in a through manner.

The inside a plurality of catalyst box that is equipped with of shell, catalyst box bottom surface are equipped with the perforating hole, and inside the packing of catalyst box has organic sulphur catalyst of hydrolysising.

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

The shell bottom be the toper pipe, the uncovered diameter in toper pipe upper end is greater than the uncovered diameter of lower extreme, second blast pipe and the uncovered through connection of toper pipe lower extreme.

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

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

The upper cover of the replacing opening is provided with a sealing door.

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

The first fixing plate and the second fixing plate are connected through bolts in a fastening mode.

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

(1) the inside top of the first casing of decarbonization tower has the gas-water separation function for the exhaust synthetic gas is dry after the decarbonization, and later stage need not increasing gas-water separation device.

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

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

(4) The heat exchange tube of the reboiler rotates all the time in the use process, so that liquid inside the heat exchange tube is in close contact with the inner wall of the heat exchange tube, and the heat exchange efficiency is improved.

(5) When the heat exchange tube of the reboiler rotates, the first scraper plate cleans the outer wall of the heat exchange tube, so that surface scaling or attachment generation is avoided, and the heat exchange efficiency of the heat exchange tube is maintained.

Drawings

The invention is further illustrated with reference to the following figures and examples.

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

FIG. 2 is a first sectional view of a decarbonizing tower in a syngas desulfurization and decarbonizing system in accordance with the present invention,

figure 3 is a front view of figure 2,

FIG. 4 is an enlarged view of portion A of FIG. 3,

FIG. 5 is a second sectional view of a decarbonizing tower in a syngas desulfurization and decarbonizing system in accordance with the present invention,

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

FIG. 7 is a third sectional view of a decarbonizing tower in a syngas desulfurization and decarbonizing system in accordance with the present invention,

FIG. 8 is a structural diagram of a spray device of a decarburization tower in a desulfurization and decarburization system for synthesis gas according to the invention,

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

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

FIG. 11 is an axial sectional view of a reboiler of a system for desulfurizing and decarbonizing syngas according to the present invention,

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

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

FIG. 14 is a second radial sectional view of a reboiler of a system for desulfurizing and decarbonizing syngas in accordance with the present invention,

FIG. 15 is a schematic diagram showing the external appearance of a dry desulfurization apparatus in a desulfurization and decarburization system for synthesis gas according to the present invention,

FIG. 16 is an exploded view of a dry desulfurization unit in a syngas desulfurization and decarbonization system of the present invention,

FIG. 17 is a partial sectional view of the housing of the dry desulfurization unit of the system for desulfurizing and decarbonizing syngas of the present invention,

FIG. 18 is a sectional view of the upper end gas tank of the dry desulfurization device in the system for desulfurizing and decarbonizing synthesis gas according to the present invention,

FIG. 19 is a sectional view of a desulfurization tank of a dry desulfurization apparatus in a system for desulfurizing and decarbonizing syngas according to the present invention,

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

FIG. 21 is a horizontal sectional view of the bottom surface of a gas tank at the lower end of a dry desulfurization device in a system for desulfurizing and decarbonizing synthesis gas according to the present invention,

FIG. 22 is a structural diagram of a gas distribution device of a dry desulfurization device in a system for desulfurizing and decarbonizing synthesis gas according to the present invention,

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

FIG. 24 is a schematic view showing the appearance of an organic sulfur water generator reactor in the system for desulfurizing and decarbonizing synthesis gas according to the present invention,

FIG. 25 is an exploded view of an organic sulfur water machine reactor in the system for desulfurizing and decarbonizing syngas of the present invention,

FIG. 26 is a sectional view of the reactor shell of an organic sulfur water machine in the system for desulfurizing and decarbonizing synthesis gas according to 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-a first shell, 12-a barren solution inlet pipe, 1201-a coil pipe, 13-a sieve plate, 14-a conical plate, 1401-a connecting block, 15-a mixing barrel, 1501-an inner cavity, 1502-a conical groove, 1503-a packing net, 1504-a sieve plate group, 16-a rich solution discharge pipe, 17-a blocking plate, 1701-a floating plate, 18-a vertical rod, 1801-a limiting rod, 19-a supporting rod, 110-a sewage discharge pipe, 111-an inclined plate, 112-an air outlet pipe, 113-a cooling sleeve, 11301-a cooling solution inlet pipe, 11302-a cooling solution outlet pipe and 114-a synthesis gas inlet pipe;

21-a first shell, 2101-a bearing seat, 22-a heat exchange tube, 2201-an end tube, 2202-a first scraper, 2203-a liquid accumulation box, 2204-a spray hole, 2205-a snap ring, 2206-a belt pulley, 23-a liquid inlet tube, 24-a liquid outlet tube, 25-a steam supply tube, 26-a steam discharge tube, 27-a partition plate, 2701-a through hole, 28-a second scraper, 2801-a fixed rod, 29-a sewage discharge tube, 210-a synchronous belt, 211-a motor and 212-a rotary seal;

3-desulfurization device, 301-air inlet manifold, 302-air outlet manifold, 303-first series pipeline, 304-second series pipeline, 31-first shell, 3101-insertion hole, 32-first air inlet pipe, 33-first air outlet pipe, 34-desulfurization groove, 3401-desulfurizer placing groove, 3402-convex ring, 3403-catching groove, 35-filter plate, 36-upper end air groove, 3601-first gas collecting groove, 37-lower end air groove, 3701-second gas collecting groove, 38-gas distribution device, 3801-top plate, 3802-middle plate, 3803-bottom plate, 3804-first connecting rod, 3805-second connecting rod, 39-connecting air pipe, 3901-gas collecting cavity and 310-blank plate;

41-shell, 4101-taper 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-jet orifice, 4402-steam supply tube, 45-catalyst box, 46-sealing door, 4601-second fixing plate.

Detailed Description

The attached drawings are preferred embodiments of the synthesis gas desulfurization and decarbonization system, and the invention is further described in detail in the following with reference to the attached drawings.

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

The synthesis gas desulfurization and decarburization system further comprises a synthesis gas buffer tank, a liquid distribution pump, a liquid distribution tank, an underwater pump, an accident tank, a barren solution cooler, an active carbon filter, a liquid distributor, a desulfurization heater, a temperature and pressure reduction device, a steam condensate pipe, a steam condensate pump, an original sulfur cooler, a barren and rich solution heat exchanger, a carbon dioxide cooler and a carbon dioxide splitter. The structure and connection method of each device are all the prior art.

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

A coil pipe 1201 is arranged above the inside of the first shell 11, a plurality of spraying holes are formed in the coil pipe 1201, and a lean solution inlet pipe 12 communicated with the coil pipe 1201 is arranged outside the first shell 11. The coil 1201 is a spiral pipe, so that the coverage area of the coil can be ensured, and meanwhile, the flow resistance in the spiral pipe is small, so that the kinetic energy loss of the MDEA can be reduced. The spraying hole can be additionally provided with an atomizing nozzle or a shower nozzle, so that the spraying area of the 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 each sieve plate 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. Thereafter, the MDEA solution flows downward through the through holes of the sieve plate, and the synthesis gas flows upward through the through holes, and the both are brought into contact with each other by convection, whereby the synthesis gas is decarburized.

A plurality of inclined plates 111 are arranged above the coil 1201, the horizontal projection length of the inclined plates 111 is greater 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 greater 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 manner. Because the horizontal projection length of the inclined plate 111 is greater than the radius of the first shell 11, the middle position of the upper inclined plate 111 and the lower inclined plate 111 is provided with an overlapping part, so that the flow path in the synthesis gas upflow process is in a broken line shape.

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

In this embodiment, the cooling device is an annular cooling sleeve 113, a cavity is disposed inside the cooling sleeve 1130, and a cooling medium flows inside the cavity. The cooling sleeve 1130 is externally provided with a cooling liquid inlet pipe 11301 and a cooling liquid outlet pipe 11302 which are communicated with the cooling sleeve 1130, 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 sieve plate 13 is guided by the top surface of the conical plate 14, flows into the gap between the conical plate 14 and the first housing 11, and then flows downward through the gap to form a water curtain, being highest at the center of the top surface of the conical plate 14. The syngas must pass through a water curtain during the upward flow, thereby providing an opportunity for direct contact of the syngas with the MDEA solution.

The periphery of the bottom surface of the tapered plate 14 is provided with 3-6 connecting blocks 1401, the connecting blocks 1401 are arranged in a gap between the tapered plate 14 and the inner wall of the first shell 11, and the tapered plate 14 is fixedly connected with the first shell 11 through the connecting blocks 1401.

A mixing barrel 15 is arranged below the conical plate 14, and the outer diameter of the mixing barrel 15 is the same as the inner diameter of the first shell 11. An inner cavity 1501 with upper and lower ends both arranged open is arranged in the center of the mixing barrel 15, and a filler net 1503 is arranged at an opening at 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 opening at the upper end of the inner cavity 1501 is located at the center of the conical groove 1502, the MDEA solution flows into the opening at the upper end of the inner cavity 1501 under the flow guiding action of the conical groove 1502, 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 enable the MDEA solution to spread out, then flows downwards through the through holes, and the contact opportunity of the synthesis gas and the MDEA solution is provided for one time.

The lower half part of the inner cavity 1501 is in a circular truncated cone shape, a sieve plate group 1504 is arranged in the circular truncated cone shape 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 surface of each sieve plate is in contact with the inner wall of the inner cavity 1501 and is fixedly connected with the inner wall of the inner cavity 1501. The through holes on the sieve plates are arranged in a staggered mode, so that the MDEA solution flowing down from the upper sieve plate collides with the lower sieve plate firstly, the solution generates sputtering, and the density of the solution in the space between the two sieve plates is increased.

The filling material can be filled between two adjacent screen plates 13, between the screen plates 13 and the conical plates 14, and between the conical plates 14 and the mixing barrel 15.

A synthetic gas inlet pipe 114 is arranged outside the first shell 11, and the synthetic gas inlet pipe 114 and a through opening of the first shell 11 are positioned below the mixing barrel 15. A rich liquid discharge pipe 16 is arranged outside the first casing 11 and is communicated with the inner cavity of the first casing, and the rich liquid discharge pipe 16 and a through hole of the first casing 11 are positioned below a through hole of the synthesis gas inlet pipe 114 and the first casing 11.

The through part of the rich liquid discharge pipe 16 and the first casing 11 is located on the side wall of the first casing 11, a blocking plate 17 which is vertically arranged is blocked at the through opening of the rich liquid discharge pipe 16 and the first casing 11, and a floating plate 1701 which is horizontally arranged is fixed on one side of the blocking plate 17 facing the axis of the first casing 11. The floating plate 1701 is fixedly connected to the upper end surface of the blocking plate 17 so that the liquid surface is always positioned above the open position of the through-hole of the rich liquid discharge pipe 16 and the first casing 11.

The two sides of the blocking plate 17 are respectively provided with a vertical rod 18, the vertical rods 18 are in contact with the side faces, facing the axis of the first shell 11, of the blocking plate 17, the bottom of each vertical rod 18 is fixedly connected with the bottom face of the first shell 11, the top of each vertical rod 18 is provided with a limiting rod 1801, and each limiting rod 1801 is located above the corresponding blocking plate 17. The two vertical rods 18 enable the blocking plate 17 to move only up and down and cannot move along the radial direction of the first shell 11, and therefore the sealing effect of the blocking plate 17 is guaranteed. Meanwhile, the floating plate 1701 is located between the two vertical rods 18 and the side surface is in contact with the vertical rods 18, so that the blocking plate 17 is effectively prevented from shaking.

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

The bottom of the first shell 11 is provided with a sewage draining pipe 110, and the through connection between the sewage draining pipe 110 and the inside of the first shell 11 is located on the bottom surface of the first shell 11.

The reboiler comprises a second shell 21, the second shell 21 is cylindrical, and a plurality of supporting legs are arranged below the second shell 21. The heat exchange tube 22 is arranged in the second shell 21, two ends of the heat exchange tube 22 are respectively coaxially connected with an end tube 2201 in a through mode, the inner diameter of the end tube 2201 is smaller than that of the heat exchange tube 22, and the through connection position of the end tube 2201 and the heat exchange tube 22 is provided with an arc transition.

The end of the end pipe 2201 penetrates through the outside of the second casing 21, one end of the liquid inlet pipe 23 and one end of the liquid outlet pipe 24 are inserted into the end pipe 2201, and the two end pipes 2201 are coaxially rotated and connected with the liquid inlet pipe 23 and the liquid outlet pipe 24 in a penetrating manner. Feed liquor pipe 23 and regeneration tower bottom through connection, drain pipe 24 and regeneration tower lateral wall through connection all are equipped with the electric control valve on feed liquor pipe 23 and the drain pipe 24.

In order to increase the sealing performance between the liquid inlet pipe 23 and the liquid outlet pipe 24 and the end pipe 2201, the rotary seals 212 are respectively arranged 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 seals 212 adopt the prior art.

When the heat exchanger is used, the end pipe 2201 rotates, in order to reduce the friction force between the end pipe 2201 and the second shell 21, bearing seats 2101 which are coaxial with the heat exchange pipe 22 are arranged outside two sides of the second shell 21, the end pipe 2201 penetrates through the bearing seats 2101, and a bearing is arranged between the outer wall of the end pipe 2201 and the inner wall of the bearing seats 2101.

The end pipe 2201 is sleeved with a snap ring 2205 on the circumferential surface inside the second housing 21, the snap ring 2205 is in contact with the inner wall of the second housing 21, and the snap 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 arranged along the axial direction of the heat exchange tube 22, the length of the first scraping plates 2202 is the same as that 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 scrapers 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 scrapers 2202 can drive liquid inside to rotate, so that centrifugal force is generated, and the liquid is tightly attached to the inner wall of the heat exchange tube 22.

To achieve the rotation of the heat exchange tube 22 during use, three methods can be used:

the method comprises the following steps: the heat exchange tube 22 and the liquid inlet tube 23 are provided with a cylindrical liquid accumulation box 2203 at the through hole, the circumferential surface of the liquid accumulation box 2203 is provided with a plurality of spray holes 2204, and the spray holes 2204 connect the inside of the liquid accumulation box 2203 with the inside of the heat exchange tube 22 in a through way.

The spray holes 2204 are distributed in an annular array around the axis of the heat exchange tube 22, and the axis of the spray holes 2204 is not coincident with the radial line of the liquid storage box 2203. The liquid sprayed from the spraying hole 2204 pushes the heat exchange pipe 22 reversely, so that the heat exchange pipe 22 rotates. The liquid jetted from the jet hole 2204 impinges on the first scraper 2202, further increasing the urging force, and causing the heat exchange tube 22 to rotate.

The second method comprises the following steps: the part of one of the end tubes 2201, which is located outside the second housing 21, is sleeved with a belt pulley 2206, the outside of the second housing 21 is fixed with a motor 211, and a synchronous belt 210 is sleeved between an 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.

The third method comprises the following steps: the device is provided with a first mechanism and a second mechanism.

The second casing 21 is internally provided with a second scraper 28 arranged parallel to the axis of the heat exchange tube 22, the end surface of the second scraper 28 is in contact 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 casing 21 through a fixing rod 2801. The second scraper 28 cleans the outer wall of the heat exchange tube 22 during rotation.

A steam supply pipe 25 and a steam discharge pipe 26 penetrating and connected to the inner cavity of the second casing 21 are provided outside the second casing.

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

A steam supply pipe 25 is positioned at one side of the liquid outlet pipe 24, and a steam discharge pipe 26 is positioned at one side of the liquid inlet pipe 23.

The heat exchange tube 22 is sleeved with an annular partition plate 27 at the outer center part, and the inner diameter of the partition 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 steam supply pipe 25 and the steam discharge pipe 26 are respectively located on both sides of the axis of the second casing 21.

The bottom of the second shell 1 is positioned at two sides of the clapboard 27 and is respectively connected with a sewage discharge pipe 29 in a through way, and the sewage discharge pipe 29 is provided with a stop valve.

The desulfurization device 3 includes a third casing 31, an upper end gas groove 36 and a lower end gas groove 37 are fixed to the upper and lower sides of the inside of the third casing 31, respectively, and a desulfurization groove 34 is slidably provided between the upper end gas groove 36 and the lower end gas groove 37. The upper end gas groove 36 and the lower end gas groove 37 are in close contact with the desulfurization groove 34, so that the synthesis gas is prevented from flowing away from the gaps between the upper end gas groove 36 and the desulfurization groove 34 and between the lower end gas groove 37 and the desulfurization groove 34.

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

An insertion port 3101 is provided on the side surface of the third casing 31, a bulkhead 310 is provided over the insertion port 3101, and the bulkhead 310 is fixedly connected to the third casing 31 by bolts. After removing the bulkhead 310, the desulfurization tank 34 can be moved to the outside of the third casing 31 through the insertion port 3101, and the desulfurizing agent can be replaced.

The desulfurizing groove 34 is provided with a plurality of desulfurizing agent placing grooves 3401, the desulfurizing agent placing grooves 3401 may 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.

Openings are formed in the upper side and the lower side of the desulfurizer placing groove 3401, a convex ring 3402 is arranged on the inner side of each opening in a protruding mode, and the filter plate 35 is arranged above the convex ring 3402. The desulfurizer is filled in the desulfurizer placing groove 3401, the desulfurizer is placed between the two filter plates 35, and the diameter of the desulfurizer is larger than that 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 port 3201 is internally provided with a catching groove 3403. Tools such as hooks can be inserted into the buckle grooves 3403 to facilitate the movement of the desulfurization tank 34.

The upper end gas groove 36 is provided with first gas collecting grooves 3601 which are the same in number as the desulfurizer 3401 and are oppositely arranged, and the lower end gas groove 37 is provided with second gas collecting grooves 3701 which are the same in number as the desulfurizer 3401 and are oppositely arranged.

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

In order to facilitate that the first intake duct 32 and the first exhaust duct 33 are both located above the third casing 31, in this embodiment, the number of the desulfurizing agent placing grooves 3401, the first gas collecting grooves 3601, and the second gas collecting grooves 3701 is even.

The first gas collecting channel 3601 on the upper end gas channel 36 is connected with a first gas inlet pipe 32 in a penetrating way, and the first gas inlet pipe 32 penetrates through the outside of the third shell 31.

The gas collecting channel 36 at the upper end is provided with connecting gas pipes 39 inside the odd-numbered first gas collecting channels 3601 except the first gas collecting channel 3601, and the gas inlet ends of the connecting gas pipes 39 are communicated with the first gas collecting channel 3601 at the front end of the first gas collecting channel 3601.

The second gas collecting grooves 3701 arranged in even number on the lower gas collecting groove 37 are all internally provided with connecting gas pipes 39, and the gas inlet ends of the connecting gas pipes 39 are in through connection with the second gas collecting grooves 3701 at the front ends of the second gas collecting grooves 3701.

Meanwhile, a gas collecting cavity 3901 communicated with the connecting gas pipe 39 is arranged at the inlet end of the connecting gas pipe 39, the horizontal section of the gas collecting cavity 3901 is in an isosceles trapezoid shape, and the connecting gas pipe 39 is communicated with the first gas collecting groove 3601 or the second gas collecting groove 3701 through the gas collecting cavity 3901.

A first exhaust pipe 33 is provided outside the third casing 31, and the first exhaust pipe 33 is connected to one of the first gas collecting channel 3601 at the end of the upper gas collecting channel 36 or the second gas collecting channel 3701 at the end of the lower gas collecting channel 37, which is not provided with the connecting gas pipe 39.

For example, the number of the desulfurizing agent placing grooves 3401, the first gas collecting grooves 3601 and the second gas collecting grooves 3701 is 4, and then the connecting gas pipes 39 are arranged inside the 3 rd first gas collecting groove 3601 on the upper gas collecting groove 36, and the gas inlet ends of the connecting gas pipes 39 are connected with the 2 nd first gas collecting groove 3601 in a penetrating manner.

The 2 nd and 4 th second gas collecting grooves 3701 on the lower end gas collecting groove 37 are both internally provided with a connecting gas pipe 39, and the 1 st and 3 rd second gas collecting grooves 3701 at the gas inlet end of the connecting gas pipe 39 are in through connection.

The third casing 31 is provided with a first exhaust pipe 33 outside, and the first exhaust pipe 33 is connected with the 4 th upper end gas collecting groove 36 in a penetrating manner.

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

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

An air distribution device 38 is arranged between the elbow of the connecting air pipe 39 and the desulfurizing groove 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 axis of the top plate 3801 is coincident with the axis of the elbow outlet of the connecting air pipe 39, and the diameter of the top plate 3801 is larger than or equal to the diameter of the elbow outlet.

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

The top plate 3801, the intermediate plate 3802, and the bottom plate 3803 are circular plates having an equal diameter, and the bottom plate 3803 is provided with a plurality of through holes.

Each of the plurality of intermediate plates 3802 and the plurality of bottom plates 3803 are arranged in an annular array about an axis of the top plate 3801, a distance between an axis of the intermediate plate 3802 and an axis of the top plate 3801 is equal to or greater than a diameter of the top plate 3801, and a distance between an axis of the bottom plate 3803 and an axis of the intermediate plate 3803 is equal to or greater than a diameter of the top plate 3801.

The distance between the axis of bottom plate 3803 and the axis of top plate 3801 is greater than the distance between the axis of middle plate 3802 and the axis of 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 distributor 38 is fixedly connected with the upper end air groove 36 or the lower end air groove 37 through a second connecting rod 3805. One end of the second connecting rod 3805 is fixedly connected with the inner wall of the upper end air groove 36 or the lower end air groove 37, and the other end is fixedly connected with the top plate 3801 or the middle plate 3802 or the bottom plate 3803 or a plurality of plates.

Each group includes two desulfurization devices 3, and an intake manifold 301 is all connected jointly to first intake pipe 32 of each desulfurization device 3, and an exhaust manifold 302 is all connected jointly to first exhaust pipe 33 of each desulfurization device 3. A first series pipeline 303 is arranged between the first exhaust pipe 31 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 31 of the desulfurization device B.

And stop valves are arranged at the interface of the first air inlet pipe 31 and the air inlet manifold 301, the interface of the first exhaust pipe 32 and the exhaust manifold 302, and the first series pipeline 303 and the second series pipeline 304. By adjusting the on-off state of each stop valve, the two desulfurization devices can be connected in series and in parallel.

When the desulfurizing agents are connected in parallel, one of the desulfurizing devices 3 can be stopped to replace the desulfurizing agents. The front and back positions of the two desulfurization devices 3 can be adjusted when the desulfurization devices are connected in series, and the front of the desulfurizer is replaced newly.

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, 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 air exhaust, the bottom of the housing 41 is a conical tube 4101, the diameter of the upper end opening of the conical tube 4101 is larger than that of the lower end opening, and the second exhaust pipe 43 is in through connection with the lower end opening of the conical tube 4101.

The housing 41 is provided therein with a plurality of catalyst cartridges 45, and the catalyst cartridges 45 are cylindrical in shape and have the same outer diameter as the inner diameter of the housing 41. In order to further increase the sealing effect and prevent the syngas from flowing away from the gap between the catalyst cartridge 45 and the housing 41, a sealing ring or an annular rubber sleeve is sleeved on the circumferential surface of the catalyst cartridge 45. The catalyst cartridge 45 has a through hole in the bottom surface thereof, and the catalyst cartridge 45 is filled with an organic sulfur hydrolysis catalyst. The upper end of the catalyst box 45 is arranged in an open manner, or a filter plate with a through hole is paved at the upper end. If a filter plate is laid, the filter plate can be detached, 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 exchanger 44, a plurality of spray holes 4401 are formed in the steam ring 44, the openings of the spray holes 4401 face the inner area of the steam exchanger 44, and the axes of the spray holes 4401 are horizontally arranged or obliquely arranged upwards. The outer casing 41 is provided with a steam supply pipe 4402 penetrating the inner cavity of the steam ring 44.

The outer diameter of the steam ring 44 is the same as the inner diameter of the casing 41, or 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 spray holes 4401.

In this embodiment, the catalyst cartridge 45 is removable from the interior 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 replacing port 4102 corresponding to the catalyst box 45, the opening radian of the replacing port 4102 is more than or equal to 180 degrees, and the replacing port 4102 is covered with a sealing door 46. First fixing plates 4103 are convexly arranged at two sides of the replacement port 4102, second fixing plates 4601 are convexly arranged at two ends of the sealing door 46, and the first fixing plates 4103 and the second fixing plates 4601 are fastened and connected through bolts.

In order to increase the sealing effect of the sealing door 46, a sealing groove is recessed in the end face of the sealing door 46 contacting 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 in the shell 41.

The air distribution device 38 comprises 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 is coincident with the axis of the second air inlet pipe 42.

The top plate 3801, the middle plate 3802 and the bottom plate 3803 are circular plates, the top plate 3801, the middle plate 3802 and the bottom plate 3803 are 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 distributor 38 is fixedly connected with the housing 41 through 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 those skilled in the art without departing from the gist of the present invention.

Claims

1. The system for desulfurizing and decarbonizing the synthesis gas is characterized in that:

comprises a decarbonization tower, a regeneration tower, a reboiler, an organic sulfur hydrolysis reactor and a dry-method desulphurization device,

the lower end of the decarbonization tower is provided with a synthesis gas inlet pipe (114), an outlet pipe (112) at the upper end of the decarbonization tower is sequentially connected with the organic sulfur hydrolysis reactor and the dry-method desulfurization device through pipelines,

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

the barren liquor outlet at the lower end of the regeneration tower is connected with barren liquor (12) of the decarbonization tower through a pipeline, the rich liquor inlet at the upper end of the regeneration tower is communicated with a rich liquor discharge pipe (16) of the decarbonization tower through a pipeline, and the reboiler is connected with the regeneration tower through a pipeline.

2. The syngas desulfurization and decarbonization system of claim 1 wherein:

the decarbonization tower comprises a first shell (11), a coil pipe (1201) is arranged above the inner part of the first shell (11), a plurality of spray holes are arranged on the coil pipe (1201), a barren solution inlet pipe (12) 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),

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

a rich liquid discharge pipe (16) communicated with the inner cavity of the first shell (11) is arranged outside the first shell (11), a through hole between the rich liquid discharge pipe (16) and the first shell (11) is positioned below a through hole between a synthetic 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 rows of inclined plates (111) are respectively arranged at two sides of the axis of the first shell (11), 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 run-through way,

a cooling device is sleeved at the position, corresponding to the inclined plate (111), outside the first shell (11), one end of the inclined plate (111) is in direct contact with the cooling device through the first shell (11),

the cooling device is an annular cooling sleeve (113), a cavity is arranged in the cooling sleeve (1130), a refrigerant flows in the cavity,

and a cooling liquid inlet pipe (11301) and a cooling liquid outlet pipe (11302) which are communicated with the cooling sleeve (1130) are arranged outside the cooling sleeve, and the cooling liquid inlet pipe (11301) is positioned below the cooling liquid outlet pipe (11302).

3. The syngas desulfurization and decarbonization system of claim 2 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),

the periphery of the bottom surface of the conical plate (14) is provided with 3-6 connecting blocks (1401), the conical plate (14) is fixedly connected with the first shell (11) by the connecting blocks (1401),

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

the lower half part of the inner cavity (1501) is in a circular truncated cone shape, a sieve plate group (1504) is arranged in the circular truncated cone shape 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 surface of each sieve plate is in contact with the inner wall of the inner cavity (1501) and is fixedly connected with the inner wall of the inner cavity.

4. The syngas desulfurization and decarbonization system of claim 2 or 3, wherein:

the through part of the rich liquid discharge pipe (16) and the first shell (11) is positioned on the side wall of the first shell (11), a blocking plate (17) which is vertically arranged is blocked at the through hole of the rich liquid discharge pipe (16) and the first shell (11), a floating plate (1701) which is horizontally arranged is fixed at one side of the blocking plate (17) facing to 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 surfaces of the blocking plate (17) facing to 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), each limiting rod (1801) is positioned above the blocking plate (17),

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

5. The system for desulfurizing and decarbonizing syngas as set forth in 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 connected with an end tube (2201) in a through manner, the inner diameter of the end tube (2201) is smaller than that of the heat exchange tube (22),

the end pipes (2201) penetrate through the outside of 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 and rotating manner, the liquid inlet pipe (23) is communicated with the bottom of the regeneration tower, the liquid outlet pipe (24) is communicated with the side wall of the regeneration tower, electric control valves are respectively arranged on the liquid inlet pipe (23) and the liquid outlet pipe (24),

a second scraper (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 scraper (28) is contacted with the outer wall of the heat exchange tube (22), the second scraper (28) is fixedly connected with the inner wall of the second shell (21) through a fixing rod (2801),

a steam supply pipe (25) and a steam discharge pipe (26) which are communicated with the inner cavity of the second shell (21) are arranged outside the second shell.

6. The syngas desulfurization and decarbonization system of claim 5, wherein:

the 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 steam supply pipe (25), the steam discharge pipe (26) and the second shell (21) are positioned in the same plane,

the 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),

the through hole of the heat exchange tube (22) and the liquid inlet tube (23) is covered with a liquid accumulation box (2203), the circumferential surface of the liquid accumulation box (2203) is provided with a plurality of spray holes (2204), the spray holes (2204) connect the interior of the liquid accumulation box (2203) with the interior of the heat exchange tube (22) in a through way,

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

7. The syngas desulfurization and decarbonization system of claim 1 wherein:

the dry desulfurization device comprises a third shell (31), an upper end gas groove (36) and a lower end gas groove (37) are respectively fixed on the upper side and the lower side in the third shell (31), a desulfurization groove (34) is arranged between the upper end gas groove (36) and the lower end gas groove (37) in a sliding manner,

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

a plurality of desulfurizer placing grooves (3401) are arranged on the desulfurizing groove (34), the upper and lower ends of the desulfurizer placing groove (3401) are respectively provided with a filter plate (35), the desulfurizer is filled in the desulfurizer placing groove (3401),

the upper end gas groove (36) is provided with a first gas collecting groove (3601) which has the same number with the desulfurizer placing grooves (3401) and is oppositely arranged, the lower end gas groove (37) is provided with a second gas collecting groove (3701) which has the same number with the desulfurizer placing grooves (3401) and is oppositely arranged,

a first gas collecting groove (3601) on the upper end gas groove (36) is communicated with a first gas inlet pipe (32), the first gas inlet pipe (32) is arranged outside the third shell (31) in a penetrating way,

the gas collecting grooves (36) at the upper end are provided with connecting gas pipes (39) except the first gas collecting groove (3601) and the other odd-numbered first gas collecting grooves (3601), the gas inlet ends of the connecting gas pipes (39) are communicated with the first gas collecting groove (3601) at the front end of the first gas collecting groove (3601),

the gas collecting grooves (3701) arranged at the even number on the lower end gas collecting groove (37) are internally provided with connecting gas pipes (39), the gas inlet ends of the connecting gas pipes (39) are communicated with the second gas collecting grooves (3701) at the front end of the second gas collecting grooves (3701),

a first exhaust pipe (33) is arranged outside the third shell (31), and the first exhaust pipe (33) is communicated with one of a first gas collecting groove (3601) at the tail end of an upper end gas collecting groove (36) or a second gas collecting groove (3701) at the tail end of a lower end gas collecting groove (37) which is not provided with a connecting gas pipe (39).

8. The syngas desulfurization and decarbonization system of claim 7 further characterized by:

the inlet end of the connecting air pipe (39) is provided with a gas collection cavity (3901) communicated with the connecting air pipe, the horizontal section of the gas collection cavity (3901) is in an isosceles trapezoid shape, and the connecting air pipe (39) is communicated with the first gas collection groove (3601) or the second gas collection groove (3701) through the gas collection cavity (3901).

9. The syngas desulfurization and decarbonization system of 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 through way,

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

an annular steam ring (44) is arranged above the catalyst box (45), a plurality of spray holes (4401) are arranged on the steam ring (44), a steam supply pipe (4402) 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 an opening at the upper end of the conical tube (4101) is larger than that of an opening at the lower end, and the second exhaust pipe (43) is communicated with the opening at the lower end of the conical tube (4101).

10. The syngas desulfurization and decarbonization system of claim 9 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) is provided with a replacing port (4102) at the position corresponding to the catalyst box (45), the opening radian of the replacing port (4102) is more than or equal to 180 degrees,

a sealing door (46) is covered on the replacing port (4102),

a first fixing plate (4103) is convexly arranged at two sides of the replacing opening (4102), a second fixing plate (4601) is convexly arranged at two ends of the sealing door (46),

the first fixing plate (4103) and the second fixing plate (4601) are fastened and connected by bolts.