CN212263213U - Fluidized reaction system - Google Patents

Abstract

The utility model discloses a fluidization reaction system, include fluidization subassembly, separator assembly and preheat the subassembly. The utility model discloses a fluidization reaction system preheats the subassembly through setting up, carries out the in-process of fluidization reaction in the fluidization subassembly, preheats the subassembly and can preheat the solid material that lets in the fluidization subassembly for the solid material that lets in the fluidization subassembly can react with gaseous material immediately, no longer need reserve the heating space of solid material, has improved the space utilization of fluidization subassembly, has reduced the emergence of side reaction simultaneously, has improved the purity and the reaction efficiency of product.

Description

Fluidized reaction system

Technical Field

The utility model relates to a fluidization reaction system.

Background

Fluidized bed refers to the suspension of a large number of solid particles in a moving fluid, such that the particles have certain apparent characteristics of the fluid. Fluidized bed reactors are an important chemical reactor for fluidizing solid particles and fluid based on the fluidization of a fluidized bed, and are particularly suitable for strongly exothermic reactions or endothermic reactions.

The fluidized bed reactor generally comprises a cylinder and a heat exchange tube arranged in the cylinder, solid materials, catalytic materials and gas materials are introduced into the cylinder for fluidized reaction, a heating medium is introduced into the heat exchange tube for heat exchange with the materials for fluidized reaction, and finally the reaction materials are introduced out of the cylinder. However, in the existing fluidized bed reactor, the solid material introduced into the cylinder is usually a cold material at normal temperature with relatively low temperature, so that the solid material does not have the temperature required for the fluidization reaction when entering the cylinder and cannot react with the gas material, and therefore, a section of heating space must be reserved in the cylinder for heat exchange and temperature rise of the solid material, and the solid material can be fluidized with the gas material after reaching the reaction temperature. The inner space of the cylinder of the fluidized bed reactor is limited, and the reserved heating space occupies the reaction space of normal fluidized reaction, so that the space utilization rate in the cylinder of the fluidized bed reactor is low, and the output of unit space is reduced; meanwhile, because the fluidization reaction is greatly influenced by the temperature, the temperature of the heating space is inconsistent with that of the reaction space, so that side reactions are increased, and the purity and the reaction efficiency of the product are influenced.

Disclosure of Invention

The utility model aims at overcoming the not enough of prior art, provide a compact structure and high fluidized reaction system of space utilization.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a fluidization reaction system comprises a fluidization component and a separation component, wherein the fluidization component comprises a first barrel, a first heat exchange coil wound on the periphery of the first barrel, a first feed inlet, an air inlet and a first discharge outlet which are arranged on the first barrel, a first heat exchange pipe arranged in the first barrel, a first heat medium inlet and a first heat medium outlet which are arranged on the first barrel and communicated with pipe orifices at two ends of the first heat exchange pipe respectively, the fluidization reaction system further comprises a preheating component,

the preheating assembly comprises a second barrel, a second feed inlet and a second discharge outlet which are arranged on the second barrel, a second heat exchange tube arranged in the second barrel, a second heat medium inlet and a second heat medium outlet which are arranged on the second barrel and are respectively communicated with tube orifices at two ends of the second heat exchange tube;

the second discharge gate with between the first feed inlet, first discharge gate with between the separator assembly with be linked together through first pipeline respectively between the second feed inlet, first heat medium export with between the second heat medium import the second heat medium export with be linked together through the second pipeline respectively between the first heat medium import.

Preferably, the inner cavity of the first cylinder comprises a feeding cavity, a reaction cavity and a first discharging cavity which are sequentially communicated along the length direction of the inner cavity, the first feeding hole and the air inlet are respectively communicated with the feeding cavity, the first discharging hole is communicated with the first discharging cavity, and the first heat exchange tube is positioned in the reaction cavity.

Further preferably, the fluidization assembly further comprises a first tube plate arranged in the first cylinder and located between the reaction chamber and the first discharge chamber, and a second tube plate arranged in the first discharge chamber, the second tube plate divides the first discharge chamber into a first cavity and a second cavity, the first heat medium inlet is communicated with the first cavity, the first heat medium outlet is communicated with the second cavity, a tube orifice at one end of the first heat exchange tube can penetrate through the first tube plate and is communicated with the second cavity, and a tube orifice at the other end of the first heat exchange tube can sequentially penetrate through the first tube plate and the second tube plate and is communicated with the first cavity.

Still further preferably, the first heat exchange tube comprises a plurality of groups of U-shaped tubes, each group of U-shaped tubes comprises a plurality of sections of straight tubes and a plurality of sections of bent tubes communicated between every two adjacent sections of the straight tubes, and the fluidization assembly further comprises a plurality of connecting pieces, wherein two ends of the connecting pieces are detachably connected with the bent tubes, close to the first tube plate, of the plurality of sections of bent tubes and the first tube plate.

Still further preferably, the plate surface of the first tube plate is recessed towards the direction close to the first discharging cavity to form a curved surface, the fluidization assembly further comprises a discharging pipe located in the first discharging cavity, one end of the discharging pipe is inserted into the recessed center of the first tube plate and communicated with the reaction cavity, and the other end of the discharging pipe can sequentially penetrate through the second cavity and the first cavity and is communicated with the first discharging hole.

Preferably, the fluidization assembly further includes an air inlet module disposed in the feeding cavity, the air inlet module includes an annular distribution pipe disposed in the feeding cavity around the circumference of the first cylinder, a plurality of air inlet pipes arranged at intervals on the outer peripheral side of the first cylinder and communicated with the distribution pipe, and a plurality of distribution holes disposed at intervals on the inner annular pipe wall of the distribution pipe, the air inlet pipes and the distribution holes extend in the same direction along the radial inclined direction of the first cylinder, the inclination angle between the extending direction of the air inlet pipes and the radial direction of the first cylinder is a, the inclination angle between the distribution holes and the radial direction of the first cylinder is b, wherein 0 ° < a < 60 °, 0 ° < b < 60 °, and the inclination angle between the distribution holes and the radial direction of the first cylinder is b

Still further preferably, the fluidization assembly further includes a first conical cavity disposed between the feed cavity and the reaction cavity, the first conical cavity radially expanding in a direction from the feed cavity to the reaction cavity.

Still further preferably, the fluidization assembly further comprises a distribution module arranged in the feeding cavity and located between the first feeding hole and the air inlet module, the distribution module comprises a distribution plate internally connected to the inner circumferential side wall of the first cylinder in the circumferential direction of the first cylinder, and a plurality of distribution heads arranged in an annular array around the center of the distribution plate, and the distribution direction of the distribution heads is consistent with the arrangement direction of the feeding cavity and the first discharging cavity.

Preferably, the preheating assembly further comprises a third tube plate and a fourth tube plate which are sequentially arranged in the second cylinder along the length direction of the second cylinder, the third tube plate and the fourth tube plate divide the second cylinder into a heat exchange cavity, a medium inlet cavity and a medium outlet cavity which are sequentially communicated, the second feed inlet is communicated with the heat exchange cavity, the second heat medium inlet is communicated with the medium inlet cavity, and the second heat medium outlet is communicated with the medium outlet cavity.

Preferably, the second heat exchange tube includes an outer tube and an inner tube, one end of the outer tube is inserted into the third tube plate and is communicated with the medium inlet cavity, the other end of the outer tube is a closed end and extends toward the heat exchange cavity, one end of the inner tube is inserted into the fourth tube plate and is communicated with the medium outlet cavity, and the other end of the inner tube can penetrate through the third tube plate in a matched manner and is inserted into the outer tube.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a fluidization reaction system preheats the subassembly through setting up, carries out the in-process of fluidization reaction in the fluidization subassembly, preheats the subassembly and can preheat the solid material that lets in the fluidization subassembly for the solid material that lets in the fluidization subassembly can react with gaseous material immediately, no longer need reserve the heating space of solid material, has improved the space utilization of fluidization subassembly, has reduced the emergence of side reaction simultaneously, has improved the purity and the reaction efficiency of product.

Drawings

FIG. 1 is a schematic structural view of a fluidized reaction system according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a fluidization assembly in an embodiment of the present invention;

fig. 3 is a schematic view of the installation of the connecting member with the first tube sheet and the elbow according to the embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view A-A of FIG. 1;

fig. 5 is a schematic structural diagram of a cloth module in an embodiment of the present invention;

FIG. 6 is an enlarged schematic view of FIG. 5 at B;

fig. 7 is a schematic view of a connection structure of the second heat exchange tube, the third tube plate and the fourth tube plate according to an embodiment of the present invention.

In the figure: 1. a separation assembly; 2. a first cylinder; 2a, a feeding cavity; 2b, a reaction cavity; 2c, a first discharging cavity; 2c1, a first cavity; 2c2, a second cavity; 2d, a first conical cavity; 3. a first heat exchange coil; 4. a first feed port; 5. an air inlet; 6. a first discharge port; 7. a first heat exchange tube; 7a, a U-shaped pipe; 7a1, straight tube; 7a2, elbow; 8. a first heating medium inlet; 9. a first heating medium outlet; 10. a second cylinder; 10a, a heat exchange cavity; 10b, a media inlet cavity; 10c, a media outlet cavity; 10d, a second conical cavity; 10e, a second discharging cavity; 11. a second feed port; 12. a second discharge port; 13. a second heat exchange tube; 13a, an outer tube; 13b, an inner tube; 14. a second heating medium inlet; 15. a second heating medium outlet; 16. a first pipeline; 17. a second pipeline; 18. a first tube sheet; 19. a second tube sheet; 20. a connecting member; 21. a first discharge pipe; 22. a distribution pipe; 23. an air inlet pipe; 24. a dispensing aperture; 25. a distributing plate; 26. a material distribution head; 27. a third tube sheet; 28. a fourth tube sheet; 29. a first fan; 30. a cooler; 31. a second fan; 32. a material return pipe; 33. a second heat exchange coil; 34. a second discharge pipe; 35. a gas inlet; 36. a gas distributor.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

The utility model relates to an improvement to fluidized bed reactor. The fluidization reaction system after the improvement preheats the subassembly through setting up, carries out the in-process of fluidization reaction in the fluidization subassembly, preheats the subassembly and can preheat the solid material that lets in the fluidization subassembly for the solid material that lets in the fluidization subassembly can react with gaseous material immediately, no longer need reserve the heating space of solid material, has improved the space utilization of fluidization subassembly, has reduced the emergence of side reaction simultaneously, has improved the purity and the reaction efficiency of product.

Referring to fig. 1-7, a fluidized reaction system is shown, including a fluidizing assembly and a separation assembly 1.

In this example, the fluidization assembly is used for carrying out fluidization reaction on solid material, catalytic material and gas material to obtain a product, and includes the first barrel 2 that sets up from top to bottom, around the first heat exchange coil 3 that sets up 2 week sides of first barrel, set up in the first feed inlet 4 of 2 bottoms of first barrel, set up in the air inlet 5 of 2 bottom lateral parts of first barrel, set up in the first discharge gate 6 at 2 tops of first barrel, locate the first heat exchange tube 7 in the first barrel 2, set up on first barrel 2 and respectively with the first heat medium import 8 and the first heat medium export 9 of the both ends mouth of first heat exchange tube 7 intercommunication. The first feed inlet 4 is used for introducing solid materials and catalytic materials, the gas inlet 5 is used for introducing gas materials, and the first heat exchange tube 7 is used for introducing a heating medium. The gas material drives the solid material to flow upwards and carry out fluidization reaction in the flowing process, the heat released by the reaction exchanges heat with the heat medium flowing in the first heat exchange tube 7, and the obtained product is output from the first discharge hole 6 at the top.

In this embodiment, the first heat exchange coil 3 is connected to a heating boiler for introducing a high-temperature heat medium. When the fluidized reaction system is started up and operated for the first time, the reaction materials in the first cylinder 2 need to be heated through the high-temperature heat conduction oil in the first heat exchange coil 3, so that the reaction materials reach the temperature required by the fluidized reaction.

The separation component 1 comprises a plurality of cyclone separators which are connected in sequence and used for separating products obtained after reaction, extracting and storing pure products and separating solid materials which are not completely consumed.

Further, as shown in fig. 1, the fluidized reaction system further includes a preheating assembly, the preheating assembly is used for heating the solid material, and the preheating assembly includes a second cylinder 10 arranged up and down, a second feed inlet 11 arranged at the upper part of the second cylinder 10, a second discharge outlet 12 arranged at the bottom of the second cylinder 10, a second heat exchange tube 13 arranged in the second cylinder 10, a second heat medium inlet 14 and a second heat medium outlet 15 arranged on the second cylinder 10 and respectively communicated with the pipe orifices at two ends of the second heat exchange tube 13. The solid material can be introduced from the second feeding hole 11 at the upper part, and heat-exchanged with the heating medium in the second heat exchange pipe 13 to be heated, and then output from the second discharging hole 12 at the lower part.

The heating media in the first heat exchange tube 7, the first heat exchange coil 3 and the second heat exchange tube 13 can be heat conduction oil.

The second discharge port 12 is communicated with the first feed port 4, the first discharge port 6 is communicated with the separation assembly 1, and the separation assembly 1 is communicated with the second feed port 11 through a first pipeline 16, and the first heating medium outlet 9 is communicated with the second heating medium inlet 14, and the second heating medium outlet 15 is communicated with the first heating medium inlet 8 through a second pipeline 17. A first fan 29 is arranged on the first pipe 16 between the separation assembly 1 and the second inlet 11 for feeding the separated solids to the second drum 10.

Thus, the tube side and the shell side in the preheating assembly and the fluidizing assembly can be communicated with each other. More specifically, the preheating assembly and the fluidizing assembly share two circulation paths.

On one hand, the heat conducting oil in the first heat exchange tube 7 and the second heat exchange tube 13 can circularly flow, so that the heat conducting oil which is heated after exchanging heat with the material in the first cylinder 2 in the first heat exchange tube 7 can flow into the second heat exchange tube 13 and exchange heat with the solid material in the second cylinder 10 to heat the solid material, and the heat conducting oil which is cooled after exchanging heat in the second heat exchange tube 13 can flow back into the first heat exchange tube 7 to absorb the heat released by the material in the first cylinder 2 in the fluidization reaction again and then heat up, thereby realizing circulation;

on the other hand, the solid material preheated in the second cylinder 10 is a mixture of the incompletely consumed solid material and the fresh solid material separated by the separation component 1, the mixture is preheated by the second heat exchange tube 13 and then introduced into the first cylinder 2 to directly perform a fluidization reaction with the gas material, a product obtained after the fluidization reaction is separated by the separation component 1 to obtain the incompletely consumed solid material, and the solid material and the fresh solid material are mixed and then introduced into the second cylinder 10 again to be preheated, so that circulation is realized.

Therefore, the solid material preheated in the second cylinder 10 can be immediately fluidized after entering the first cylinder 2, the reaction time is shortened, the reaction efficiency is improved, and the improvement of the reaction efficiency is estimated to be between 3% and 8%.

In this example, as shown in fig. 1, a cooler 30 and a second fan 31 are further communicated with the second pipeline 17 between the second heat medium outlet 15 and the first heat medium inlet 8, the cooler 30 is used for cooling the heat conducting oil which flows back to the first heat exchanging pipe 7 from the second heat exchanging pipe 13 again so as to better absorb the heat released by the fluidization reaction, and the second fan 31 is used for sucking the heat conducting oil so as to better flow back to the first cylinder 2.

As shown in fig. 1-2, the inner cavity of the first cylinder 2 includes a feeding cavity 2a, a reaction cavity 2b and a first discharging cavity 2c which are sequentially communicated from bottom to top, the first feeding port 4 and the air inlet 5 are respectively communicated with the feeding cavity 2a, the first discharging port 6 is communicated with the first discharging cavity 2c, and the first heat exchange tube 7 is located in the reaction cavity 2 b.

Further, as shown in fig. 2, the fluidization assembly further includes a first tube plate 18 disposed in the first cylinder 2 and located between the reaction chamber 2b and the first discharging chamber 2c, and a second tube plate 19 disposed in the first discharging chamber 2c, the second tube plate 19 divides the first discharging chamber 2c into a first chamber 2c1 and a second chamber 2c2, the first heating medium inlet 8 is communicated with the first chamber 2c1, the first heating medium outlet 9 is communicated with the second chamber 2c2, an orifice at one end of the first heat exchange tube 7 can penetrate through the first tube plate 18 and is communicated with the second chamber 2c2, and an orifice at the other end of the first heat exchange tube 7 can penetrate through the first tube plate 18 and the second tube plate 19 in sequence and is communicated with the first chamber 2c 1.

Thus, the space above the first cylinder 2 is utilized as a transfer cavity for the heat medium to enter and exit, and the pipe orifices at the two ends of the first heat exchange pipe 7 are directly and upwards connected to the first pipe plate 18 and the second pipe plate 19, so that the fluidization component in the embodiment does not need to be provided with a transfer collection box on the periphery of the cylinder as in the traditional technology, and does not need to horizontally arrange the heat exchange pipes and communicate with the transfer collection box, thereby avoiding the damage caused by the solid material washing from bottom to top of the horizontally arranged heat exchange pipes.

Further, as shown in fig. 2 to 3, the first heat exchange tube 7 includes a plurality of groups of U-shaped tubes 7a, each group of U-shaped tubes 7a includes a plurality of straight tubes 7a1 and a plurality of bent tubes 7a2 communicated between each two adjacent straight tubes 7a1, and the fluidization assembly further includes a plurality of connecting pieces 20, two ends of each connecting piece being detachably connected to the bent tube 7a2 of the plurality of bent tubes 7a2 close to the first tube plate 18 and the first tube plate 18. This 20 two-way screw rod structures of connecting piece, its both ends are threaded connection respectively on first tube sheet 18 and return bend 7a2, can realize the fastening in narrow and small space, and the dismouting is more convenient. The hoist and mount of heat exchange tube are realized to first tube sheet 18 of cooperation, no longer need set up huge gallows structure like that of traditional technique and hoist and mount the heat exchange tube, have avoided reaction material upwards to erode the damage that the gallows leads to the gallows on the one hand, and on the other hand has saved the space, has improved space utilization. The material of the connecting piece 20 can be carbon steel, and the model is 20#, Q235B or 15CrMo, which is determined according to the weight of the single group of U-shaped tubes 7 a. The upper portion of the connector 20 can be directly screwed to the first tube sheet 18, and the lower portion of the connector 20 can be connected to the forging at the elbow 7a2 by using a steel exchange and forging combination method, and the connector 20 and the forging are connected by using the steel exchange.

Preferably, as shown in fig. 1-2, the plate surface of the first tube plate 18 is concave towards the direction close to the first discharging cavity 2c to form a curved surface, the fluidization assembly further includes a first discharging tube 21 located in the first discharging cavity 2c, one end of the first discharging tube 21 is inserted into the concave center of the first tube plate 18 and is communicated with the reaction cavity 2b, and the other end of the first discharging tube 21 can sequentially pass through the second cavity 2c2 and the first cavity 2c1 and is communicated with the first discharging hole 6. The first curved tube plate 18 can reduce the calculated thickness of the tube plate, so that the steel consumption is reduced, the problems of cost increase caused by large-scale production and supporting load of an equipment rigid platform are solved, and the design load of a basic frame is reduced; meanwhile, the curved first tube plate 18 is better stressed and is not easy to damage. The most important point is that the curved first tube plate 18 can also play a role of collecting gas flow, guiding the reacted gas product to the center of the recess, and matching with the first discharge pipe 21, completely discharging the reacted gas product.

In this example, the first tube sheet 18 is made of a steel plate or a forged piece, the distance of the recesses is 30-100 mm, and the thickness of the first tube sheet 18 may be 80 mm, 85 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm, 200 mm, 210 mm, 220 mm, 130 mm, 140 mm, 250 mm, 260 mm, 270 mm, and 280 mm. The arrangement shape of the nozzles at one end of the first heat exchange tube 7 on the first tube plate 18 can be triangular.

As shown in fig. 4, the fluidization assembly further includes an air inlet module disposed in the feeding cavity 2a, the air inlet module includes an annular distribution pipe 22 disposed in the feeding cavity 2a around the circumference of the first cylinder 2, a plurality of air inlet pipes 23 arranged at intervals on the outer circumferential side of the first cylinder 2 and communicated with the distribution pipe 22, and a plurality of distribution holes 24 arranged at intervals on the inner annular pipe wall of the distribution pipe 22, the air inlet pipes 23 and the distribution holes 24 extend in a radially inclined arrangement along the first cylinder 2, and the inclined directions of the air inlet pipes 23 and the distribution holes 24 are the same, the inclined angle between the extending direction of the air inlet pipes 23 and the radial direction of the first cylinder 2 is a, the inclined angle between the distribution holes 24 and the radial direction of the first cylinder 2 is b, wherein 0 ° < a < 60 °, and 0 ° < b < 60 °. Here, the gas inlet module is located above the gas inlet 5 and is used for introducing gas materials for the second time on the basis of introducing gas into the gas inlet 5.

Through the setting of foretell air intake module, the gaseous material that the air inlet 5 of lower part let in drives the vertical upward movement of solid material and catalysis material that first feed inlet 4 let in, the gaseous material of secondary let in 23 intake pipe afterwards, the gaseous material that the secondary let in gets into in distributing pipe 22 from the intake pipe 23 of slope, in 24 spirals entering feeding chamber 2a from tangential distribution hole afterwards, and upwards erode first heat exchange tube 7 with the material of lower part upward movement's mixture back spiral, the laminar flow layer between material and the first heat exchange tube 7 has been attenuate, greatly increased the heat transfer coefficient between material and the first heat exchange tube 7, can improve about 10% through calculating the heat transfer coefficient.

Further, as shown in fig. 1, a material return pipe 32 is further disposed on the first pipeline 16 between the second discharge port 12 and the first feed port 4, one end of the material return pipe 32 is communicated with the first pipeline 16, and the other end of the material return pipe is communicated with the side portion of the first cylinder 2, so that part of the solid material flowing in the first pipeline 16 enters the first cylinder 2 from the material return pipe 32, and the solid material is introduced through the first feed port 4, so that the material can move circumferentially around the inner wall of the cylinder 3 while moving upwards, and formation of spiral airflow is facilitated.

Further, as shown in fig. 1, the fluidization assembly further includes a first conical chamber 2d disposed between the feed chamber 2a and the reaction chamber 2b, the first conical chamber 2d radially expanding in a direction from the feed chamber 2a to the reaction chamber 2 b. First toper chamber 2d can regard as the buffer space between feeding chamber 2a and the reaction chamber 2b, and the ascending mixture of spiral more is favorable to forming the spiral air current of tornado formula and upwards erodees first heat exchange tube 7 through the buffering of first toper chamber 2d, has avoided the material directly upwards to erode the damage that first heat exchange tube 7 leads to, has prolonged the life of first heat exchange tube 7.

As shown in fig. 5-6, the fluidizing assembly further includes a material distribution module disposed in the feeding cavity 2a and located between the first feeding port 4 and the air intake module, the material distribution module includes a material distribution plate 25 inscribed in the inner circumferential sidewall of the first cylinder 2 around the circumference of the first cylinder 2, and a plurality of material distribution heads 26 arranged in an annular array around the center of the material distribution plate 25, and the material distribution direction of the material distribution heads 26 is upward. By arranging the material distribution direction of the material distribution head 26 upward, the material can be sprayed vertically upward and fluidized uniformly. The distributing heads 26 are T-shaped small distributors made of silicon carbide and have the thickness of 30-90 mm, and the arrangement distance of the distributing heads 26 is 20 mm. The top of the T-shaped small distributor is provided with an opening, the diameter of the opening is 1-5 mm, and the opening rate of the distributor is 15% -20%. The distribution plate 25 is provided with a T-shaped hole, a small T-shaped distributor is inserted, and the bottom is fixed by a screw tap.

As shown in fig. 1, the preheating assembly further includes a third tube plate 27 and a fourth tube plate 28 sequentially arranged in the second cylinder 10 from bottom to top, the third tube plate 27 and the fourth tube plate 28 divide the second cylinder 10 into a heat exchange cavity 10a, a medium inlet cavity 10b and a medium outlet cavity 10c sequentially communicated from bottom to top, the second feed port 11 and the second discharge port 12 are respectively communicated with the heat exchange cavity 10a, the second heat medium inlet 14 is communicated with the medium inlet cavity 10b, and the second heat medium outlet 15 is communicated with the medium outlet cavity 10 c. Wherein the advantages of the media entrance chamber 10b and the media exit chamber 10c are the same as the first chamber 2c1 and the second chamber 2c2 described above.

The third tube plate 27 and the fourth tube plate 28 can be made of plates or forgings, the material is Q345R, or 16MnII, and the arrangement shape of the second heat exchange tubes 13 on the third tube plate 27 and the fourth tube plate 28 can be triangular or square; the arrangement distance is 1.4-3 times of the outer diameter of the second heat exchange tube 13, and the specific arrangement distance is calculated according to the actual solid material heating amount; the length of the second heat exchange tube 13 is 6-20m, and the specific length is determined by calculation according to the using amount of solid materials and the temperature difference before and after heat exchange.

In this embodiment, as shown in fig. 1, the preheating assembly further includes a second tapered cavity 10b and a second discharging cavity 10e, which are sequentially disposed below the heat exchange cavity 10a from top to bottom, and the second tapered cavity 10b is radially reduced from top to bottom, so that the material can more conveniently fall into the second discharging cavity 10 e; meanwhile, a second heat exchange coil 33 is arranged around the second conical cavity 10b and used for introducing and discharging high-temperature heat conduction oil so as to further heat the solid material which falls into the second conical cavity 10b and does not reach the reaction temperature. The second discharge hole 12 is opened at the lower end side part of the second discharge cavity 10e, a downward inclined second discharge pipe 34 is communicated with the second discharge hole 12, and the downward inclined second discharge pipe 34 is more convenient for discharging.

Further, as shown in fig. 7, the second heat exchange tube 13 includes an outer tube 13a and an inner tube 13b, one end of the outer tube 13a is inserted into the third tube plate 27 and is communicated with the medium inlet cavity 10b, the other end is a closed end and extends toward the heat exchange cavity 10a, one end of the inner tube 13b is inserted into the fourth tube plate 28 and is communicated with the medium outlet cavity 10c, and the other end can be inserted into the outer tube 13a through the third tube plate 27. The closed end of the outer pipe 13a is conical, so that the heat transfer oil can enter the medium inlet cavity 10b from the second heat medium inlet 14, then enter the outer pipe 13a downwards, reach the closed end at the bottom of the outer pipe 13a, then flow back upwards to the inner pipe 13b under the action of the stamping force, and then enter the medium outlet cavity 10c and then be output from the second heat medium outlet 15. The second heat exchange tube 13 that the interior outer tube set up intensity is better and not fragile, more is applicable to the not good second barrel 10 of fluidization effect.

The outer tube 13a and the inner tube 13b can be made of 20G materials, the outer tube 13a can be made of 144X8 phi, 133X6 phi 114X6 phi 108X6 phi 89X6 phi 76X6 phi and 60.3X6 pipe diameters, the inner tube can be made of 114X4 phi 89X4 phi 76X4 phi 60X4 phi 57X4 phi 45X4 phi 38X4 pipe diameters, and the inner tube and the outer tube can be 20 meters, 19 meters, 18 meters, 17 meters, 16 meters, 15 meters, 14 meters, 13 meters, 12 meters, 10 meters, 9 meters, 8 meters, 7 meters and 6 meters in length. The bottom of the outer pipe 13a is made of a forged piece, and the forged piece and the outer pipe 13a form a butt joint to ensure sealing and wear resistance; meanwhile, in order to prevent the solid materials from being washed away, the bottom of the outer pipe 13a can be sprayed with a wear-resistant layer.

In this embodiment, the bottom of the second cylinder 10 is provided with a gas inlet 35 for introducing gas and driving the solid material to flow and discharge. A gas distributor 36 is arranged in the second outlet chamber 10e above the gas inlet 35, which gas distributor 36 is known per se for uniform distribution of the gas fed in.

In the fluidized reaction system, the reaction capacity can be improved by 20-30%, the side reaction is reduced by 3-5%, and the purity of reactants is greatly improved; meanwhile, the reaction efficiency of the unit volume in the first cylinder 2 can be improved by 5-8%.

The following specifically explains the working process of this embodiment: after the fluidized reaction system is started up and operated, introducing reaction materials into the first barrel 2, and synchronously introducing high-temperature heat conduction oil into the first heat exchange coil 3, wherein the high-temperature heat conduction oil exchanges heat with the reaction materials, so that the temperature of the reaction materials is rapidly increased to reach the reaction temperature, the reaction materials can perform fluidized reaction, and then the heat conduction oil in the first heat exchange coil 3 is output;

low-temperature heat conducting oil is synchronously introduced into the first heat exchange tube 7, the low-temperature heat conducting oil exchanges heat with reaction materials to absorb heat emitted by the fluidization reaction, and then the heated high-temperature heat conducting oil can circularly flow from the first heat exchange tube 7 to the second heat exchange tube 13;

outputting a product obtained after a reaction material is subjected to a fluidization reaction from the first cylinder 2 and feeding the product into the separation component 1 for separation, condensing, rectifying and collecting the product obtained after separation, inputting the separated residual solid material into the second cylinder 10, synchronously inputting a fresh solid material into the second cylinder 10 at the moment, mixing the fresh solid material and the residual solid material into a mixed material, performing heat exchange with high-temperature heat conduction oil circularly flowing into the second heat exchange tube 13, flowing the mixed material heated after the heat exchange into the first cylinder 2, and performing a fluidization reaction with a gas material input from the gas inlet 5 directly, inputting the product obtained after the reaction into the separation component 1, separating the residual solid material out, and then feeding the product into the second cylinder 10 again for preheating, so as to realize circulation;

and the heat conduction oil cooled after heat exchange circularly flows into the first heat exchange tube 7 again, can exchange heat with the material subjected to the fluidization reaction again, and flows back into the second heat exchange tube 13 again after heat exchange to exchange heat with the solid material in the second cylinder 10, so that circulation is realized.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a fluidization reaction system, includes fluidization subassembly and separator subassembly (1), the fluidization subassembly includes first barrel (2), around locating first heat exchange coil (3) of first barrel (2) week side, set up in first feed inlet (4), air inlet (5) and first discharge gate (6) on first barrel (2), locate first heat exchange tube (7) in first barrel (2), set up in first barrel (2) go up and respectively with first heat medium import (8) and first heat medium export (9) that the both ends mouth of pipe of first heat exchange tube (7) is linked together, its characterized in that: the fluidized reaction system further comprises a preheating assembly,

the preheating assembly comprises a second barrel (10), a second feed inlet (11) and a second discharge outlet (12) which are arranged on the second barrel (10), a second heat exchange tube (13) which is arranged in the second barrel (10), and a second heat medium inlet (14) and a second heat medium outlet (15) which are arranged on the second barrel (10) and are respectively communicated with tube orifices at two ends of the second heat exchange tube (13);

second discharge gate (12) with between first feed inlet (4) first discharge gate (6) with between separator assembly (1) with be linked together through first pipeline (16) respectively between second feed inlet (11), first heat medium export (9) with between second heat medium import (14) second heat medium export (15) with be linked together through second pipeline (17) respectively between first heat medium import (8).

2. The fluidized reaction system of claim 1, wherein: the inner cavity of the first barrel body (2) comprises a feeding cavity (2 a), a reaction cavity (2 b) and a first discharging cavity (2 c) which are sequentially communicated along the length direction of the inner cavity, the first feeding hole (4) and the air inlet (5) are respectively communicated with the feeding cavity (2 a), the first discharging hole (6) is communicated with the first discharging cavity (2 c), and the first heat exchange tube (7) is located in the reaction cavity (2 b).

3. The fluidized reaction system of claim 2, wherein: the fluidization assembly also comprises a first tube plate (18) arranged in the first cylinder (2) and positioned between the reaction chamber (2 b) and the first discharging chamber (2 c), and a second tube plate (19) arranged in the first discharging chamber (2 c), the second tube plate (19) divides the first discharging cavity (2 c) into a first cavity body (2 c 1) and a second cavity body (2 c 2), the first heating medium inlet (8) is communicated with the first cavity (2 c 1), the first heating medium outlet (9) is communicated with the second cavity (2 c 2), and a pipe orifice at one end of the first heat exchange pipe (7) can penetrate through the first pipe plate (18) and is communicated with the second cavity (2 c 2), and a pipe orifice at the other end of the first heat exchange pipe (7) can penetrate through the first pipe plate (18) and the second pipe plate (19) in sequence and is communicated with the first cavity (2 c 1).

4. The fluidized reaction system of claim 3, wherein: the first heat exchange tube (7) comprises a plurality of groups of U-shaped tubes (7 a), each group of U-shaped tubes (7 a) comprises a plurality of sections of straight tubes (7 a 1) and a plurality of sections of bent tubes (7 a 2) communicated between every two adjacent sections of the straight tubes (7 a 1), and the fluidization assembly further comprises a plurality of connecting pieces (20) with two ends respectively close to the bent tubes (7 a 2) of the first tube plate (18) and the first tube plate (18) which are detachably connected in the plurality of sections of bent tubes (7 a 2).

5. The fluidized reaction system of claim 3, wherein: the face of first tube sheet (18) is towards being close to the sunken curved surface form that forms of direction in first ejection of compact chamber (2 c), fluidization subassembly is still including being located first discharging pipe (21) in first ejection of compact chamber (2 c), first discharging pipe (21) one end is inserted and is located the sunken center of first tube sheet (18) and with reaction chamber (2 b) are linked together, the other end can pass in proper order second cavity (2 c 2) with first cavity (2 c 1) and with first discharge gate (6) are linked together.

6. The fluidized reaction system of claim 2, wherein: the fluidization assembly further comprises an air inlet module arranged in the feeding cavity (2 a), the air inlet module comprises an annular distribution pipe (22) arranged in the feeding cavity (2 a) along the circumferential direction of the first barrel (2), a plurality of air inlet pipes (23) arranged at intervals on the peripheral side part of the first barrel (2) and communicated with the distribution pipe (22), and a plurality of distribution holes (24) arranged at intervals on the inner ring pipe wall of the distribution pipe (22), the air inlet pipes (23) and the distribution holes (24) are respectively arranged along the radial inclined arrangement of the first barrel (2) and the inclined directions of the air inlet pipes and the distribution holes are consistent, the inclined angle between the extending direction of the air inlet pipes (23) and the radial direction of the first barrel (2) is a, the inclined angle between the distribution holes (24) and the radial direction of the first barrel (2) is b, wherein, a is more than 0 degree and less than 60 degrees, and b is more than 0 degree and less than 60 degrees.

7. The fluidized reaction system of claim 2 or 6, wherein: the fluidization assembly further comprises a first conical cavity (2 d) arranged between the feed cavity (2 a) and the reaction cavity (2 b), the first conical cavity (2 d) radially expanding in the direction from the feed cavity (2 a) to the reaction cavity (2 b).

8. The fluidized reaction system of claim 6, wherein: the fluidization assembly is further provided with a material distribution module arranged in the feeding cavity (2 a) and located between the first feeding hole (4) and the air inlet module, the material distribution module comprises a material distribution plate (25) which is connected with the inner peripheral side wall of the first cylinder (2) in an inscribed mode in the circumferential direction of the first cylinder (2) and a plurality of material distribution heads (26) which are arranged in an annular array mode around the center of the material distribution plate (25), and the material distribution direction of the material distribution heads (26) is consistent with the arrangement direction of the feeding cavity (2 a) and the first material outlet cavity (2 c).

9. The fluidized reaction system of claim 1, wherein: preheating unit still include along the length direction of second barrel (10) arrange in proper order in third tube sheet (27) and fourth tube sheet (28) in second barrel (10), third tube sheet (27) with fourth tube sheet (28) will second barrel (10) are separated for heat transfer chamber (10 a), advance media chamber (10 b) and play media chamber (10 c) that communicate in proper order, second feed inlet (11) with second discharge gate (12) respectively with heat transfer chamber (10 a) are linked together, second heat medium import (14) with it is linked together to advance media chamber (10 b), second heat medium export (15) with play media chamber (10 c) are linked together.

10. The fluidized reaction system of claim 9, wherein: the second heat exchange tube (13) comprises an outer tube (13 a) and an inner tube (13 b), one end of the outer tube (13 a) is inserted into the third tube plate (27) and communicated with the medium inlet cavity (10 b), the other end of the outer tube is a closed end and extends towards the heat exchange cavity (10 a), one end of the inner tube (13 b) is inserted into the fourth tube plate (28) and communicated with the medium outlet cavity (10 c), and the other end of the inner tube can penetrate through the third tube plate (27) in a matched mode and is inserted into the outer tube (13 a).

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