CN210875254U - Fluidized reaction system - Google Patents
Fluidized reaction system Download PDFInfo
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- CN210875254U CN210875254U CN201921513253.3U CN201921513253U CN210875254U CN 210875254 U CN210875254 U CN 210875254U CN 201921513253 U CN201921513253 U CN 201921513253U CN 210875254 U CN210875254 U CN 210875254U
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Abstract
The utility model discloses a fluidization reaction system, it is including the fluidization unit that sets gradually, separation unit and condensation unit, the fluidization unit includes the barrel that sets up along vertical direction, locate the last pipe box and the lower pipe case at both ends about the barrel respectively, set up feed inlet and air inlet on the lower pipe case, set up the discharge gate on last pipe case, above-mentioned fluidization unit is still including coiling the first heat exchange tube that is used for letting in the heat medium in the barrel, first heat exchange tube includes the heat transfer inner tube, the heat transfer outer tube on the heat transfer inner tube is located to the cover, the baffle that just can arrange round the circumference interval of heat transfer inner tube in the heat transfer outer tube is located along the extending direction of first heat exchange tube to the polylith, form annular clearance between heat transfer inner tube and the heat transfer outer tube, the polylith baffle is for many heat. The utility model discloses a fluidization reaction system can make the heat medium be full of the body of heat exchange tube completely, very big improvement heat exchange efficiency, has guaranteed the homogeneity in the temperature field during fluidization reaction.
Description
Technical Field
The utility model relates to a fluidization reaction field, concretely relates to 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.
At present, the domestic fluidized bed reactor generally utilizes heat exchange tubes in the bed body to provide the temperature required by the reaction for the fluidized reaction, wherein the heat exchange tubes are U-shaped tube groups, as shown in fig. 1, and comprise a downcomer (100) and an upcomer (101) which are parallel to each other, and a bend tube (102) which is positioned between the downcomer (100) and the upcomer (101). However, when the heat medium flows downwards along the descending pipe (100), the heat medium suddenly descends a long distance along the pipe wall due to over-fast flow, so that the descending pipe (100) cannot be filled with the heat medium, when the bent pipe (101) is filled with the heat medium in the flow process, the heat medium in the descending pipe (100) is accumulated at the bottom of the descending pipe (100), and under the communication effect of the U-shaped pipes, although the liquid level of the heat medium in the ascending pipe (101) continuously rises, part of space in the descending pipe (100) is still not filled with the heat medium. By analogy, the plurality of the downcomer pipes (100) in the U-shaped pipe group can not be completely filled with the heat medium, so that the heat medium can not take away the heat at the corresponding position, and the heat exchange efficiency and the uniformity of the temperature field during the fluidization reaction are seriously influenced.
Disclosure of Invention
The utility model aims at overcoming prior art's not enough, providing a fluidization reaction system, this fluidization reaction system can make the heat medium be full of the body of heat exchange tube completely, very big improvement heat exchange efficiency, guaranteed the homogeneity in temperature field during the fluidization reaction.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a fluidization reaction system is used for carrying out fluidization reaction on solid materials and gas materials to obtain reaction materials and comprises a fluidization unit, a separation unit and a condensation unit which are sequentially arranged, wherein the fluidization unit comprises a barrel body arranged along the vertical direction, an upper pipe box and a lower pipe box which are respectively arranged at the upper end and the lower end of the barrel body, a feed inlet and an air inlet which are arranged on the lower pipe box, and a discharge outlet which is arranged on the upper pipe box, the fluidization unit also comprises a first heat exchange pipe which is coiled in the barrel body and used for leading in a heat medium, the first heat exchange pipe comprises a heat exchange inner pipe, a heat exchange outer pipe and a plurality of partitions, the heat exchange outer pipe is sleeved on the heat exchange inner pipe, the partitions are arranged in the heat exchange outer pipe along the extension direction of the first heat exchange pipe and can be arranged around the circumferential interval of the heat exchange inner pipe, and, the plurality of clapboards divide the gap into a plurality of heat exchange channels.
Preferably, the heat exchange inner pipe is spirally arranged along the extension direction of the heat exchange outer pipe.
Further preferably, the heat exchange inner tube can be abutted against the heat exchange outer tube at a plurality of inner walls with different heights along a plurality of tube bodies in the spiral direction of the heat exchange inner tube.
Preferably, the heat transfer outer tube is including parallel arrangement and along the vertical direction extension be used for first body that heat medium upworded with be used for second body that heat medium downworded, locate first body with the third body of U-shaped between the second body, the heat transfer inner tube is located in the second body.
Further preferably, the fluidization unit further includes a U-shaped wear-resistant sleeve sleeved on the third pipe body.
Preferably, the fluidizing unit further comprises a second heat exchange pipe spirally wound around the outer circumferential portion of the cylinder in the extending direction of the cylinder for passing in and out the heating medium.
Preferably, the fluidized reaction system further comprises a material return pipe communicated between the separation unit and the fluidizing unit, and a fan arranged on the material return pipe.
Further preferably, one end of the feed back pipe is communicated with a side part of the lower pipe box perpendicular to the extending direction of the cylinder.
Preferably, the fluidized reaction system further comprises a waste heat boiler, and the waste heat boiler is respectively communicated with pipe orifices at two ends of the first heat exchange pipe and the second heat exchange pipe.
Preferably, the separation unit comprises at least two cyclone separators and a cloth bag separator which are arranged in sequence.
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, through set up heat transfer inner tube and baffle in the heat transfer outer tube, the clearance separation between baffle and the heat transfer inner tube and the heat transfer outer tube is a plurality of heat transfer passageways, and the less heat transfer inner tube of radial cross section and heat transfer passageway form the capillary, make the heat medium be full of whole heat exchange tube under the effect of capillary to increased heat transfer area, improved heat exchange efficiency, guaranteed the homogeneity of temperature field during the fluidization reaction.
Drawings
FIG. 1 is a schematic structural diagram of a heat exchange tube in the prior art;
FIG. 2 is a schematic structural view of a fluidized reaction system of the present invention;
fig. 3 is a schematic structural diagram of a first heat exchange tube of the present invention;
fig. 4 is a schematic radial cross-sectional view of a first heat exchange tube of the present invention;
fig. 5 is an installation schematic diagram of the wear-resistant sleeve of the present invention.
Wherein: 1. a separation unit; 1a, a cyclone separator; 1b, a cloth bag separator; 2. a condensing unit; 3. a barrel; 4. an upper pipe box; 5. a lower pipe box; 6. a feed inlet; 7. an air inlet; 8. a discharge port; 9. a first heat exchange tube; 9a, a heat exchange inner pipe; 9b, a heat exchange outer pipe; 9b1, a first tube; 9b2, a second tube; 9b3, a third tube; 9c, a partition plate; 9d, a heat exchange channel; 10. a wear-resistant sleeve; 11. a second heat exchange tube; 12. a material return pipe; 13. a fan; 14. a waste heat boiler;
100. a down pipe; 101. a riser pipe; 102. bending the tube.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings.
Referring to fig. 2-5, a fluidized reaction system for fluidized reaction of solid material and gas material to obtain reaction material includes a fluidizing unit, a separating unit 1 and a condensing unit 2, which are sequentially disposed, the fluidizing unit includes a cylinder 3 disposed along a vertical direction, an upper pipe box 4 and a lower pipe box 5 respectively disposed at upper and lower ends of the cylinder 3, a feed inlet 6 and an air inlet 7 disposed on the lower pipe box 5, and a discharge outlet 8 disposed on the upper pipe box 4, the fluidizing unit further includes a first heat exchange tube 9 coiled in the cylinder 3 for introducing a heat medium, the first heat exchange tube 9 includes a heat exchange inner tube 9a, a heat exchange outer tube 9b sleeved on the heat exchange inner tube 9a, and a plurality of partition plates 9c disposed in the heat exchange outer tube 9b along an extending direction of the first heat exchange tube 9 and capable of being circumferentially arranged around the heat exchange inner tube 9a at intervals, an annular gap is formed between the heat exchange inner tube 9a and the heat exchange outer tube 9b, the plurality of partition plates 9c partition the gap into a plurality of heat exchange passages 9 d.
Here, the partition plates 9c have eight pieces, and correspondingly, the divided heat exchange passages 9d have eight pieces. The feeding port 6 is used for feeding a mixture of a solid material and a catalytic material, the gas inlet 7 is used for feeding a gas material, the discharging port 8 is used for outputting a reaction material, the separation unit 1 is communicated with the discharging port 8, and a heat medium is heat conducting oil. The solid material and the catalytic material are mixed and then are sent into the barrel 3 from the feeding port 6, the gas material is introduced from the gas inlet 7, the heat conducting oil is introduced into the first heat exchange tube 9, the solid material and the gas material are subjected to fluidization reaction under the action of the catalytic material and the heat exchange of the heat conducting oil, the reaction material is output from the discharging port 8, is separated by the separation unit 1 and then enters the condensation unit 2 to be condensed into liquid, and then is collected. The separation unit 1 here comprises at least two cyclones 1a and a bag separator 1b arranged in series, and the condensation unit 2 is a condenser. In this embodiment, there are three cyclone separators 1 a. The fluidized reaction system further comprises a distributor arranged in the upper tube box 4, which is a conventional distributor for making fluid flow uniformly, and the detailed structure is not repeated.
Here, through set up heat transfer inner tube 9a and baffle 9c in heat transfer outer tube 9b, baffle 9c separates the clearance between heat transfer inner tube 9a and the heat transfer outer tube 9b for a plurality of heat transfer passageways 9d, and heat transfer inner tube 9a and heat transfer passageway 9d that radial cross-section is less form the capillary, make the heat medium fill up whole first heat exchange tube 9 under the effect of capillary to increased heat transfer area, improved heat exchange efficiency, guaranteed the homogeneity of temperature field during the fluidization reaction. The partition plate 9c is formed by rolling high-temperature stainless steel sheets, the specification of the heat exchange inner tube 9a can be phi 25, phi 32, phi 38, phi 45, phi 57, phi 76, phi 89 and phi 108, different materials can be selected according to the temperature of a heating medium, and the materials can be magnesium aluminum alloy, austenitic stainless steel series, S30408.S30403, S31608, S31603 and S32168, or common low alloy steel strips and Monel alloy, and the materials are straightened and twisted for a certain angle after argon arc welding and shaped and are placed in front of a welded elbow.
In this embodiment, heat transfer inner tube 9a is the spiral setting along the extending direction of heat transfer outer tube 9b, and heat transfer inner tube 9a can the supporting of complex along the many places body of its self helical direction on the many places inner wall of heat transfer outer tube 9b co-altitude not. Through setting up heat transfer inner tube 9a to the spiral, can make heat medium spiral flow in heat transfer inner tube 9a and heat transfer channel 9c, slowed down the flow velocity of heat medium, further improved heat exchange efficiency. Meanwhile, the tube body of the heat exchange inner tube 9a abuts against the inner wall of the heat exchange outer tube 9b, so that the heat medium can flow spirally to scour the heat exchange outer tube 9b, a laminar flow layer of the heat medium is thinned, heat transfer is enhanced, the heat transfer coefficient of the heat medium is improved, a reaction system with the same productivity can be smaller, energy is saved, the weight of equipment is reduced, the design load of a frame is reduced, and the manufacturing cost of the frame is lowered. The arrangement of the spiral heat exchange inner pipe 9a structure can increase the effective heat exchange area of the fluidized reaction system by about 25-30%, improve the reaction efficiency by about 25-30% and improve the heat transfer efficiency by about 25%.
The heat exchange outer pipe 9b comprises a first pipe body 9b1 for heat medium ascending and a second pipe body 9b2 for heat medium descending which are arranged in parallel and extend along the vertical direction, a U-shaped third pipe body 9b3 arranged between the first pipe body 9b1 and the second pipe body 9b2, and the heat exchange inner pipe 9a is arranged in the second pipe body 9b 2. Here, the heat exchange inner pipe 9a is provided in the second pipe body 9b2 to slow down the descending speed of the heating medium and improve the heat exchange efficiency.
In this embodiment, the fluidising unit further comprises a U-shaped wear sleeve 10 which is sleeved over the third tube 9b 3. The wear-resistant sleeve is a copper sleeve, the thickness of the wear-resistant sleeve is 5mm, the wear-resistant sleeve comprises two half copper sleeves which can be matched and clasped together, the two half copper sleeves are connected through bolts, the third pipe body 9b3 is hooped tightly in a matched mode, the wear-resistant performance of the third pipe body is improved, the third pipe body 9b3 is prevented from being damaged under the scouring of solid materials, the operation period and the service life of equipment are prolonged, and the service life of the first heat exchange pipe 9 is prolonged by one time.
The fluidization unit further includes a second heat exchange pipe 11 spirally wound around the outer circumferential portion of the cylinder 3 in the extending direction of the cylinder 3 for passing the heat medium therethrough. Here, the second heat exchange tube 11 is rolled into a half tube by a steel strip and welded to the outer circumference of the cylinder 3, and a heat medium is introduced therein, so that the temperature in the cylinder 3 can be brought to a reaction temperature more quickly when heat absorption is required at the initial stage of the fluidized reaction; when the fluidized reaction releases heat, the heat on the cylinder wall of the cylinder 3 can be effectively utilized, the energy utilization rate is improved, and the temperature field of the fluidized reaction is ensured to be constant. The specification of the second heat exchange tube 11 can be phi 76, phi 89, phi 108, phi 114, phi 133 and phi 159, the tube wall area occupying 5-10% of the whole fluidization reaction system area is effectively utilized, the heat exchange area of the fluidization unit can be increased by 3-4%, the heat input and precipitation problems of the reaction system are effectively solved, and the temperature field is more uniform.
In this embodiment, the fluidized reaction system further includes a feed back pipe 12 connected between the separation unit 1 and the fluidizing unit, and a fan 13 disposed on the feed back pipe 12. Here, one end of the return pipe 12 communicates with a side portion of the lower header 5 perpendicular to the extending direction of the cylindrical body 3. Through the setting of feed back pipe 12, can send the catalysis material that is not totally consumed in the solid material that the separator unit 1 was separated back to among the fluidization unit and react again, very big saving the cost. The bottom of lower tube case 5 is located to feed inlet 6 of this embodiment, and here with feed back 12 one end intercommunication in the lateral part of the perpendicular barrel 3 extending direction of lower tube case 5 to set up fan 13 and blow in the lower tube case 5 with the catalysis material side direction, make the catalysis material mix with the solid material of feed inlet 6 input, and can do the circumferential motion round the 3 inner walls of barrel on one side, upward movement on the other side transversely erodes first heat exchange tube 9, great improvement heat exchange efficiency. The heat exchange efficiency can be improved by 3-5% by arranging the feed back pipe 12 in the lateral direction.
The fluidized reaction system further comprises a waste heat boiler 14, wherein the waste heat boiler 14 is respectively communicated with pipe orifices at two ends of the first heat exchange pipe 9 and the second heat exchange pipe 11. Here, through setting up waste heat boiler 14, can the effectual heat that carries after the heat transfer oil heat transfer of utilization to use these heat for public works use, practiced thrift the energy. Here, the original heat transfer oil is stored in the heat transfer oil storage container, the pipeline is communicated with the heat transfer oil storage container when the heat transfer oil is initially supplied, and the pipeline is switched and communicated to the waste heat boiler 14 after the heat transfer oil exchanges heat, so that the heat transfer oil with heat can enter the waste heat boiler 14.
In the embodiment, the fluidized reaction system can improve the heat transfer efficiency by 10-16%; the loss of the catalyst is reduced, so that the overall reaction efficiency of the reaction system is improved by 12-15%; the operation period of the equipment is prolonged, the equipment can operate for 35 days originally and can be improved to 45-50 days at present, and the waste discharge is reduced; the manufacturing cost of the reaction system with the same capacity can be reduced by 20 percent, and the energy is saved.
The following specifically explains the working process of this embodiment: firstly, heat conducting oil with certain heat is sent into the first heat exchange tube 9 and the second heat exchange tube 11, so that the heat conducting oil flows uniformly, and the heat conducting oil is filled in the second tube body 9b2 under the action of capillary force of the heat exchange inner tube 9a and the heat exchange channel 9 d;
then, a mixture of a solid material and a catalyst is input from the feeding hole 6, a gas material is input from the gas inlet 7, the solid material and the gas material absorb heat of heat transfer oil and then generate a fluidization reaction, in the reaction process, the solid material and the gas material emit heat, at the moment, the heat transfer oil with certain heat is discharged, the heat transfer oil with normal temperature is input, the heat transfer oil absorbs heat and then flows into the waste heat boiler 14, and hot water in the waste heat boiler 14 is heated for public engineering use;
and finally, the reaction material obtained by the reaction of the solid material and the gas material enters the separation unit 1 from the discharge port 8 to be separated into solid and gas, the obtained gas product enters the condensation unit 2 to be condensed into liquid and collected, and the separated solid catalyst residue flows back to the barrel 3 through the return pipe 12 to continuously participate in the reaction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or 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 for thereby solid material carries out fluidization reaction with gaseous material and obtains the reaction material, and it is including fluidization unit, separation element (1) and the condensing unit (2) that set gradually, the fluidization unit includes barrel (3) that set up along vertical direction, locates respectively last pipe case (4) and lower pipe case (5), set up in both ends about barrel (3) feed inlet (6) and air inlet (7) on lower pipe case (5), set up in discharge gate (8) on last pipe case (4), its characterized in that: the fluidization unit still including coil in be used for in barrel (3) let in first heat exchange tube (9) that lead to the heating medium, first heat exchange tube (9) are located including heat transfer inner tube (9a), cover heat transfer outer tube (9b), polylith on heat transfer inner tube (9a) are along the extending direction of first heat exchange tube (9) is located in heat transfer outer tube (9b) and can round baffle (9c) that the circumference interval of heat transfer inner tube (9a) was arranged, heat transfer inner tube (9a) with form annular clearance between heat transfer outer tube (9b), polylith baffle (9c) will the clearance separation is for many heat transfer passageways (9 d).
2. A fluidized reaction system as set forth in claim 1 wherein: the heat exchange inner pipe (9a) is spirally arranged along the extension direction of the heat exchange outer pipe (9 b).
3. A fluidized reaction system as set forth in claim 2 wherein: the heat exchange inner pipe (9a) can be matched with a plurality of pipe bodies in the spiral direction to abut against a plurality of inner walls of the heat exchange outer pipe (9b) at different heights.
4. A fluidized reaction system as set forth in claim 1 wherein: the heat exchange outer pipe (9b) is including parallel arrangement and respectively along being used for of vertical direction extension first body (9b 1) that heat medium upwent and being used for second body (9b2) that heat medium went down, locate first body (9b 1) with the third body (9b3) of the U-shaped between the second body (9b2), heat exchange inner pipe (9a) are located in second body (9b 2).
5. A fluidized reaction system according to claim 4, wherein: the fluidization unit further comprises a U-shaped wear-resistant sleeve (10) sleeved on the third pipe body (9b 3).
6. A fluidized reaction system as set forth in claim 1 wherein: the fluidization unit also comprises a second heat exchange pipe (11) spirally wound on the periphery of the cylinder (3) along the extension direction of the cylinder (3) and used for introducing and discharging the heating medium.
7. A fluidized reaction system as set forth in claim 1 wherein: the fluidization reaction system further comprises a material return pipe (12) communicated between the separation unit (1) and the fluidization unit, and a fan (13) arranged on the material return pipe (12).
8. A fluidized reaction system according to claim 7 wherein: one end of the material return pipe (12) is communicated with the side part of the lower pipe box (5) vertical to the extending direction of the cylinder body (3).
9. A fluidized reaction system according to claim 6 wherein: the fluidization reaction system further comprises a waste heat boiler (14), and the waste heat boiler (14) is respectively communicated with pipe orifices at two ends of the first heat exchange pipe (9) and the second heat exchange pipe (11).
10. A fluidized reaction system as set forth in claim 1 wherein: the separation unit (1) comprises at least two cyclone separators (1a) and a cloth bag separator (1b) which are arranged in sequence.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921513253.3U CN210875254U (en) | 2019-09-11 | 2019-09-11 | Fluidized reaction system |
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| CN201921513253.3U CN210875254U (en) | 2019-09-11 | 2019-09-11 | Fluidized reaction system |
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| CN210875254U true CN210875254U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449093A (en) * | 2019-09-11 | 2019-11-15 | 张家港市江南锅炉压力容器有限公司 | A kind of fluidized reaction system |
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2019
- 2019-09-11 CN CN201921513253.3U patent/CN210875254U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449093A (en) * | 2019-09-11 | 2019-11-15 | 张家港市江南锅炉压力容器有限公司 | A kind of fluidized reaction system |
| CN110449093B (en) * | 2019-09-11 | 2024-01-26 | 江苏江锅智能装备股份有限公司 | Fluidization reaction system |
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Address after: 215635 No.139 Gangfeng Road, Yangzijiang International Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (Jiangnan boiler) Patentee after: Jiangsu Jiangguo Intelligent Equipment Co.,Ltd. Address before: 215635 No.139 Gangfeng Road, Yangzijiang International Chemical Industrial Park, Zhangjiagang City, Suzhou City, Jiangsu Province (Jiangnan boiler) Patentee before: Jiangnan Boilers & Pressure Vessels (Zhangjiagang) Co.,Ltd. |
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