CN115138297A - Heat exchange device for MTBE (methyl tert-butyl ether) mixed phase bed reactor - Google Patents
Heat exchange device for MTBE (methyl tert-butyl ether) mixed phase bed reactor Download PDFInfo
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- CN115138297A CN115138297A CN202210822428.9A CN202210822428A CN115138297A CN 115138297 A CN115138297 A CN 115138297A CN 202210822428 A CN202210822428 A CN 202210822428A CN 115138297 A CN115138297 A CN 115138297A
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- reaction tank
- mtbe
- heat exchange
- bevel gear
- heat
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- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 title claims abstract description 160
- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 230000003028 elevating effect Effects 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims description 75
- 238000010438 heat treatment Methods 0.000 claims description 46
- 230000001105 regulatory effect Effects 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 10
- 238000007493 shaping process Methods 0.000 claims description 9
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract 3
- 241000124033 Salix Species 0.000 abstract 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 18
- 239000000110 cooling liquid Substances 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 230000008569 process Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000006266 etherification reaction Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/05—Preparation of ethers by addition of compounds to unsaturated compounds
- C07C41/06—Preparation of ethers by addition of compounds to unsaturated compounds by addition of organic compounds only
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
- F25D31/005—Combined cooling and heating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00026—Controlling or regulating the heat exchange system
- B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
- B01J2208/00044—Temperature measurement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00115—Controlling the temperature by indirect heat exchange with heat exchange elements inside the bed of solid particles
- B01J2208/00132—Tubes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention relates to the field of MTBE (methyl tert-butyl ether) heat exchange processing, in particular to a heat exchange device for an MTBE (methyl tert-butyl ether) mixed-phase bed reactor. The device includes the retort, two first support frames, the honeycomb duct, concentration monitoring mechanism, cooling mechanism and intensification subassembly, MTBE reacts in the retort, two first support frames are used for supporting the retort, honeycomb duct and cooling mechanism, concentration monitoring mechanism is arranged in monitoring the concentration of the MTBE solution that flows in the retort, when solution concentration is too high, cooling mechanism cools down the processing to it, snakelike flat pipe carries out the heat exchange with solution promptly, when solution concentration crosses lowly, intensification subassembly work, drive mechanism work drives elevating system lift promptly, intensification mechanism links to each other with elevating system, intensification mechanism stretches into in the retort and carries out the heat exchange through heat-conducting plate and solution, the device can handle to the MTBE solution of different concentrations, and with traditional fixed tubular heat exchanger's cold flow pipe and book willow pipe integrated as an organic whole, the integrated level is high, the suitability is strong.
Description
Technical Field
The invention relates to the field of MTBE (methyl tert-butyl ether) heat exchange processing, in particular to a heat exchange device for an MTBE (methyl tert-butyl ether) mixed-phase bed reactor.
Background
In the MTBE processing and manufacturing process, a processing device requires that the content of isobutene in the raw material C4 is within a certain range, if the content of isobutene in the raw material C4 is less than 10%, at the outlet of an etherification reactor, the reaction heat release is not enough to enable the bed temperature to rise to the bubble point of the corresponding reaction material under the operation pressure, and the reaction material cannot be vaporized, so that the mixed phase bed is not called. Therefore, the advantages of a mixed phase bed are not obtained. If the isobutene content of the feed C4 is high (e.g.greater than 40%), the conversion of this high isobutene concentration into the heat evolved by the MTBE not only vaporizes all of the methanol-C4 azeotrope and all of the remaining C4, but also the residual heat, as a result of which the bed temperature continues to rise. If the bed temperature is too high, the result is a reversion of the converted MTBE over the catalyst, i.e.an MTBE decomposition. Thus, feed C4 with too high an isobutene content cannot be used directly in mixed-phase bed technology. Theoretical calculations indicate that at 34% isobutylene content in C4, the heat of reaction to produce MTBE is sufficient to fully vaporize the unreacted C4 and C4 azeotropes with methanol. This is the maximum limit of isobutylene content that can be used by MTBE mixed phase bed technology in production applications.
Based on this, traditional fixed tube sheet heat exchanger mainly passes through baffling board and cold flow pipe when carrying out the heat exchange, and this type of heat exchanger can only carry out simple cooling to the reactant and handle, and specific theory of operation is: during heat exchange, cold fluid flows in the tube through the heat exchanger, hot fluid flows out of the tube through the baffle plate, and the cold fluid and the hot fluid exchange heat through the dividing wall, so that the heat exchanger cannot accurately process MTBE with different concentrations, and therefore, a heat exchange device for an MTBE mixed phase bed reactor is necessary to be designed, which has high integration level, can raise the temperature when processing MTBE with low concentration, and can lower the temperature when processing MTBE with high concentration.
Disclosure of Invention
In view of the above, it is necessary to provide a heat exchange device for an MTBE mixed phase bed reactor in order to solve the problems of the prior art.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a heat exchange apparatus for an MTBE mixed phase bed reactor comprising:
a reaction tank: the reaction tank is arranged in a horizontal state, a feed inlet is formed at one end of the reaction tank, a socket is formed at the other end of the reaction tank, and a discharge outlet is formed at the position, far away from the feed inlet, of the lower end of the reaction tank;
the two first support frames are respectively and fixedly connected with the two vertical surfaces of the reaction tank;
one end of the flow guide pipe is fixedly connected with the feed inlet, and the other end of the flow guide pipe is fixedly connected with the MTBE reaction device;
the concentration detection mechanism is arranged below the guide pipe and is fixedly connected with the guide pipe;
the cooling mechanism comprises a snakelike flat pipe, the snakelike flat pipe is arranged inside the reaction tank, and two ends of the snakelike flat pipe penetrate through spigots of the reaction tank;
the heating assembly comprises a transmission mechanism, a plurality of lifting mechanisms and a plurality of heating mechanisms, wherein the transmission mechanism is fixedly connected with the surface of the reaction tank, which is provided with a socket, the lifting mechanisms are arranged on the upper side and the lower side of the reaction tank, each lifting mechanism is connected with the transmission mechanism, the heating mechanisms are connected with the lifting mechanisms in a one-to-one correspondence manner, each heating mechanism comprises a heat-conducting plate, and the heat-conducting plates can transfer heat and also play the role of a baffle plate.
Further, the lower extreme shaping of honeycomb duct entrance has a perforation, is provided with the second support frame between honeycomb duct and the first support frame, and the second support frame can play the supporting role to the honeycomb duct, and concentration detection mechanism includes sample pipe and concentration detection appearance, and the sample pipe is vertical state hoist and mount at fenestrate lower extreme, and concentration detection appearance is vertical state hoist and mount at the lower extreme of sample pipe.
Furthermore, the cooling mechanism further comprises a flow regulating valve, a third support frame and a plurality of fourth support frames, the flow regulating valve is arranged beside the reaction tank, a valve port of the flow regulating valve is fixedly connected with one end of the S-shaped flat tube in a fixing mode, the third support frame is arranged beside the reaction tank, one end of the third support frame is fixedly connected with the reaction tank, the other end of the third support frame is fixedly connected with the flow regulating valve, and the third support frame can ensure that the flow regulating valve does not move.
Furthermore, the snakelike flat tube comprises a partition plate and a reversing tube, the partition plate is arranged in the middle of the inner cavity of the snakelike flat tube, the partition plate divides the inner cavity of the snakelike flat tube into two cavities, the port of one cavity is sleeved with the valve port of the flow regulating valve, the port of the cavity sleeved with the valve port of the flow regulating valve is called a liquid inlet, the port of the other cavity is called a liquid outlet, the reversing tube is a hollow semicircular sleeve, and the reversing tube is arranged at one end, far away from the liquid inlet and the liquid outlet, of the snakelike flat tube.
Further, the intensification mechanism is still including supporting the base, a plurality of heating rods, a plurality of series connection strip and two heaters, it is vertical state setting to support the base, support the base pass the retort and with retort sliding connection, the shaping has spacing portion on the support base, there are a plurality of heating tanks along the equidistant shaping of long limit direction on the heat-conducting plate, a plurality of hot plates set up in the heating tank, it has two sliding trays to go back the shaping along long limit direction on the heat-conducting plate, the spacing portion and two sliding tray sliding connection who support the base, the heating rod is passed to the equidistant of a plurality of series connection strips, two heaters set up the both sides at the heat-conducting plate, the output of two heaters and the both ends fixed connection of a plurality of series connection strips.
Further, still shaping limit groove along the outside a week in heating groove on the heat-conducting plate, the intensification mechanism still includes a plurality of pipes that hold, and it has connecting portion to support still to shape on the base, a plurality of one ends and the limit groove sliding connection who holds the pipe, the other end and connecting portion fixed connection.
Further, elevating system includes the screw rod, four connecting plates, two supporting seats and two sliders, wherein, two supporting seats are the symmetrical state and set up on the retort, two supporting seats and retort fixed connection, the screw rod is the horizontality and passes two supporting seats, the both ends and the supporting seat roll connection of screw rod, two sliders are the horizontality and set up in the screw rod outside, two sliders and screw rod threaded connection, four connecting plates are two liang a set of, two sets of connecting plates are the symmetrical state and set up, the one end and the slider of every connecting plate are articulated, the other end is articulated with the support base.
Further, drive mechanism includes double-shaft motor and two output shafts, and double-shaft motor sets up on the lateral wall that the retort shaping has the socket, and double-shaft motor passes through motor frame and retort fixed connection, and two outputs of double-shaft motor are vertical state setting, and two output shafts are vertical state setting, and the output fixed connection of shaft coupling and double-shaft motor is all passed through to the one end of two output shafts.
Further, elevating system still includes first bevel gear and second bevel gear, the fixed cover of first bevel gear is established in the one end of screw rod, the second bevel gear meshes with first bevel gear mutually, power unit still includes two transmission shafts, two bevel gear racks, two third bevel gear and two fourth bevel gear, because elevating system is symmetrical state setting both sides about the retort, consequently two transmission shafts and the equal fixed grafting of second bevel gear among a plurality of elevating system in both sides, bevel gear rack cover is established in the outside of transmission shaft, the other end of two output shafts passes bevel gear rack and stretches into the inside of bevel gear rack, the fixed cover of third bevel gear is established in the one end that the output shaft stretched into bevel gear rack, fourth bevel gear meshes with third bevel gear mutually, the one end that the transmission shaft is close to the output shaft is established to the third bevel gear cover.
Compared with the prior art, the invention has the beneficial effects that:
one is as follows: the integration level is high, the concentration of MTBE to be treated can be monitored, and MTBE with different concentrations can be treated;
the second step is as follows: when the concentration of MTBE is too low, the device is subjected to heating treatment, the flow rate of the MTBE in the reaction tank is slowed down, and the heating time is prolonged;
and thirdly: when the concentration of MTBE is too high, the device is cooled, the flow rate of MTBE in the reaction tank is accelerated, and the cooling process of MTBE is accelerated.
Drawings
FIG. 1 is a first perspective view of the present invention;
FIG. 2 is a schematic perspective view of the present invention;
FIG. 3 is a partial perspective view of the first embodiment of the present invention;
FIG. 4 is an enlarged schematic view of the mechanism at A in FIG. 3;
FIG. 5 is an enlarged schematic view of the mechanism at B in FIG. 3;
FIG. 6 is an enlarged schematic view of the mechanism at C in FIG. 3;
FIG. 7 is a front view of the present invention with the side walls of the reactor vessel and bevel gear rack removed;
FIG. 8 is a schematic perspective view of a serpentine flat tube;
FIG. 9 is an exploded perspective view of a serpentine flat tube;
FIG. 10 is a schematic perspective view of the mechanism of the present invention;
FIG. 11 is a first exploded perspective view of the warming mechanism;
FIG. 12 is a second exploded perspective view of the warming mechanism;
fig. 13 is a third schematic exploded perspective view of the temperature raising mechanism.
The reference numbers in the figures are:
1. a reaction tank; 2. a feed inlet; 3. a discharge outlet; 4. a socket; 5. a first support frame; 6. a second support frame; 7. a flow guide pipe; 8. perforating; 9. a concentration detection mechanism; 10. a sample tube; 11. a concentration detector; 12. a cooling mechanism; 13. a snake-shaped flat pipe; 14. a partition plate; 15. a liquid inlet; 16. a liquid outlet; 17. a reversing tube; 18. a flow regulating valve; 19. a third support frame; 20. a fourth support frame; 21. a temperature raising component; 22. a temperature raising mechanism; 23. a heat conducting plate; 24. a limiting groove; 25. a sliding groove; 26. a heating tank; 27. accommodating the tube; 28. a support base; 29. a limiting part; 30. a connecting portion; 31. a heating rod; 32. a heater; 33. connecting the strips in series; 34. a lifting mechanism; 35. a connecting plate; 36. a supporting seat; 37. a slider; 38. a screw; 39. a first bevel gear; 40. a second bevel gear; 41. a power mechanism; 42. a drive shaft; 43. an umbrella tooth rack; 44. an output shaft; 45. a third bevel gear; 46. a fourth bevel gear; 47. a two-shaft motor.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 13, a heat exchange apparatus for an MTBE mixed phase bed reactor, comprising:
the reaction tank 1 is arranged in a horizontal state, a feed inlet 2 is formed at one end of the reaction tank 1, a spigot 4 is formed at the other end of the reaction tank 1, and a discharge outlet 3 is formed at a position, far away from the feed inlet 2, of the lower end of the reaction tank 1;
the reaction tank comprises two first support frames 5 which are arranged in a vertical state, wherein the two first support frames 5 are respectively fixedly connected with two vertical surfaces of the reaction tank 1;
one end of the flow guide pipe 7 is fixedly connected with the feed inlet 2, and the other end of the flow guide pipe is fixedly connected with the MTBE reaction device;
the concentration detection mechanism 9 is arranged below the guide pipe 7, and the concentration detection mechanism 9 is fixedly connected with the guide pipe 7;
the cooling mechanism 12 comprises a snakelike flat pipe 13, the snakelike flat pipe 13 is arranged inside the reaction tank 1, and two ends of the snakelike flat pipe 13 penetrate through the spigots 4 of the reaction tank 1;
the heating assembly 21 comprises a transmission mechanism, a plurality of lifting mechanisms 34 and a plurality of heating mechanisms 22, wherein the transmission mechanism is fixedly connected with the surface of the reaction tank 1, which is formed with the socket 4, the lifting mechanisms 34 are arranged on the upper side and the lower side of the reaction tank 1, each lifting mechanism 34 is connected with the transmission mechanism, the heating mechanisms 22 are correspondingly connected with the lifting mechanisms 34 one by one, each heating mechanism 22 comprises a heat conducting plate 23, and the heat conducting plates 23 can transfer heat and also can play a role of a baffle plate.
Referring to fig. 1, 3 and 4, a perforation 8 is formed at the lower end of the inlet of the flow guide pipe 7, a second support frame 6 is arranged between the flow guide pipe 7 and the first support frame 5, the second support frame 6 can support the flow guide pipe 7, the concentration detection mechanism 9 comprises a sample pipe 10 and a concentration detector 11, the sample pipe 10 is vertically hung at the lower end of the perforation 8, and the concentration detector 11 is vertically hung at the lower end of the sample pipe 10. When the device works, one end of the second support frame 6 is fixedly connected with the first support frame 5, the other end of the second support frame is fixedly connected with the flow guide pipe 7, when the MTBE solution is injected into the flow guide pipe 7, a part of the MTBE solution flows into the sample pipe 10 through the perforation 8, because the concentration of the MTBE solution participating in the heat exchange reaction of the same batch is not changed, when the MTBE solution flows into the heat exchange device, the sample pipe 10 samples the MTBE solution, the concentration detector 11 detects the MTBE solution in the sample pipe 10, after the heat exchange is finished, namely the MTBE solution in the batch completely reacts, before the MTBE solution in the next batch flows into the heat exchange device, an operator unscrews the sample pipe 10, keeps the MTBE solution in the sample pipe 10 for sample backup, and then installs the cleaned sample pipe 10 to the perforation 8 again, so that the sample pipe 10 can collect the MTBE solution in the next batch. When the MTBE solution that needs heat exchange treatment flows into the sample tube, concentration detector 11 detects the concentration of MTBE in sample tube 10 this moment, and this device still has the controller with concentration detector 11 electric connection, and after concentration detector 11 detected the concentration, this concentration signal transmission to controller, after the controller received this concentration signal, control heating up subassembly 21 or cooling mechanism 12 carried out corresponding operation: the temperature in the reaction tank 1 is adjusted according to the concentration of MTBE, and the specific adjusting process is shown in the working principle part.
Referring to fig. 2 and 3, the cooling mechanism 12 further includes a flow regulating valve 18, a third support frame 19 and a plurality of fourth support frames 20, the flow regulating valve 18 is disposed beside the reaction tank 1, a valve port of the flow regulating valve 18 is fixedly sleeved on one end of the serpentine flat tube 13 close to the socket 4, the third support frame 19 is disposed beside the reaction tank 1, one end of the third support frame 19 is fixedly connected with the reaction tank 1, the other end of the third support frame is fixedly connected with the flow regulating valve 18, and the third support frame 19 can ensure that the flow regulating valve 18 does not move. The third support frame 19 fixes the position of the flow regulating valve 18, so that when the device works, the flow regulating valve 18 cannot move due to water pressure, the water cooling liquid flows into the snakelike flat tube 13 through the valve port of the flow regulating valve 18, and the flow rate of the water cooling liquid can be controlled by the flow regulating valve 18 according to the required cooling amplitude, so that the temperature control of the MTBE with different concentrations is completed.
Referring to fig. 7, 8 and 9, the snakelike flat tube 13 includes a partition plate 14 and a reversing tube 17, the partition plate 14 is disposed in the middle of the inner cavity of the snakelike flat tube 13, the partition plate 14 divides the inner cavity of the snakelike flat tube 13 into two cavities, a port of one of the cavities is sleeved with a valve port of the flow regulating valve 18, a port of the cavity sleeved with the valve port of the flow regulating valve 18 is referred to as an inlet 15, a port of the other cavity is referred to as an outlet 16, the reversing tube 17 is shaped as a hollow semicircular sleeve, and the reversing tube 17 is disposed at an end of the snakelike flat tube 13 away from the inlet 15 and the outlet 16. The device during operation, water-cooling liquid flows into behind snakelike flat tub of 13 inside cavity through inlet 15, if regulation inlet 15 locates to be snakelike flat tub of 13's head end, then snakelike flat tub of 13 keeps away from the one end of inlet 15 and is terminal, when water-cooling liquid flows to snakelike flat tub of 13's end, in water-cooling liquid turns back to snakelike flat tub of 13 shaping another cavity that has liquid outlet 16 through switching-over pipe 17 to finally discharge through liquid outlet 16.
Referring to fig. 1, 11, 12 and 13, the warming mechanism 22 further includes a supporting base 28, a plurality of heating rods 31, a plurality of series-connected bars 33 and two heaters 32, the supporting base 28 is disposed in a vertical state, the supporting base 28 passes through the reaction tank 1 and is slidably connected with the reaction tank 1, a limiting portion 29 is formed on the supporting base 28, a plurality of heating grooves 26 are formed on the heat conducting plate 23 at equal intervals along the long side direction, the plurality of heating rods 31 are disposed in the heating grooves 26, two sliding grooves 25 are further formed on the heat conducting plate 23 along the long side direction, the limiting portion 29 of the supporting base 28 is slidably connected with the two sliding grooves 25, the plurality of series-connected bars 33 pass through the heating rods 31 at equal intervals, the two heaters 32 are disposed on two sides of the heat conducting plate 23, and output ends of the two heaters 32 are fixedly connected with two ends of the plurality of series-connected bars 33. When the device works, the heater 32 is started, the series strip 33 is fixedly connected with the output end of the heater 32, the series strip 33 is heated by the heater 32 to rise in temperature, the series strip 33 penetrates through the heating rod 31, the temperature of the heating rod 31 is raised along with heat exchange, the heating rod 31 is arranged in the heating groove 26 of the heat conduction plate 23, the heat conduction plate 23 is conducted by the heating rod 31 to rise in temperature, finally, the heat conduction plate 23 is heated to heat the MTBE solution in the reaction tank 1, wherein the function of the limiting part 29 is explained in detail in the working principle part.
Referring to fig. 11, 12 and 13, a limiting groove 24 is further formed on the heat conducting plate 23 along the outer periphery of the heating groove 26, the warming mechanism 22 further includes a plurality of accommodating tubes 27, a connecting portion 30 is further formed on the supporting base 28, one end of each of the plurality of accommodating tubes 27 is slidably connected with the limiting groove 24, and the other end of each of the plurality of accommodating tubes 27 is fixedly connected with the connecting portion 30. The device during operation, along with heat-conducting plate 23 temperature rising, because expend with heat and contract with cold effect, the air that exists in supporting base 28 and the heat-conducting plate 23 joint gap can be by the heating expansion, heat-conducting plate 23 and support can produce the displacement of small amplitude between the base 28 this moment, hold 27 one end of pipe and support 28 fixed connection, the other end and spacing groove 24 sliding connection, the hot-air after being heated expansion is when promoting heat-conducting plate 23 and remove, hold 27 pipe and can give the holding capacity, avoid heat-conducting plate 23 and support base 28 to produce the damage because of expend with heat and contract with cold.
Referring to fig. 1, 2 and 10, the lifting mechanism 34 includes a screw 38, four connecting plates 35, two supporting seats 36 and two sliding blocks 37, wherein the two supporting seats 36 are symmetrically disposed on the reaction tank 1, the two supporting seats 36 are fixedly connected to the reaction tank 1, the screw 38 horizontally passes through the two supporting seats 36, two ends of the screw 38 are connected to the supporting seats 36 in a rolling manner, the two sliding blocks 37 are horizontally disposed outside the screw 38, the two sliding blocks 37 are connected to the screw 38 in a threaded manner, two of the four connecting plates 35 are in a group, the two groups of connecting plates 35 are symmetrically disposed, one end of each connecting plate 35 is hinged to the sliding block 37, and the other end of each connecting plate is hinged to the supporting base 28. The device during operation, screw rod 38 rotates in two supporting seats 36, establish two outside sliders 37 of screw rod 38 through the thread connection cover this moment and can move in opposite directions, at slider 37 removal in-process, because the one end of four connecting plates 35 is articulated with two sliders 37, the long limit of four connecting plates 35 is close to vertically gradually this moment, the long limit of four connecting plates 35 tends to vertical in-process, it is articulated with the other end of four connecting plates 35 to support base 28, support base 28 is promoted by four connecting plates 35 and is carried out the ascending downward shift of vertical direction.
Referring to fig. 2, drive mechanism includes biax motor 47 and two output shafts 44, and biax motor 47 sets up on retort 1 shaping has the lateral wall of socket 4, and biax motor 47 passes through motor frame and retort 1 fixed connection, and two outputs of biax motor 47 are vertical state setting, and two output shafts 44 are vertical state setting, and the output fixed connection of shaft coupling and biax motor 47 is all passed through to the one end of two output shafts 44. When the device works, the double-shaft motor 47 is started to operate, one ends of the two output shafts 44 are fixedly connected with the output end of the double-shaft motor 47 through the coupler, and therefore the two output shafts 44 start to rotate.
Referring to fig. 1, 2, 3, 5 and 6, the lifting mechanism 34 further includes a first bevel gear 39 and a second bevel gear 40, the first bevel gear 39 is fixedly sleeved at one end of the screw 38, the second bevel gear 40 is engaged with the first bevel gear 39, the power mechanism 41 further includes two transmission shafts 42, two bevel gear racks 43, two third bevel gears 45 and two fourth bevel gears 46, because the lifting mechanism 34 is symmetrically disposed at the upper and lower sides of the reaction tank 1, the two transmission shafts 42 are fixedly inserted into the second bevel gears 40 of the lifting mechanisms 34 at the two sides, the bevel gear racks 43 are sleeved at the outer sides of the transmission shafts 42, the other ends of the two output shafts 44 penetrate through the bevel gear racks 43 and extend into the bevel gear racks 43, the third bevel gear 45 is fixedly sleeved at one end of the output shaft 44 extending into the bevel gear racks 43, the fourth bevel gears 46 are engaged with the third bevel gears 45, and the third bevel gears 45 are sleeved at one end of the transmission shafts 42 close to the output shaft 44. When the device works, when two output shafts 44 start to rotate, a third bevel gear 45 sleeved at the outer end of each output shaft 44 starts to rotate, a fourth bevel gear 46 is meshed with the third bevel gear 45, the rotation of the third bevel gear 45 can drive the fourth bevel gear 46 to rotate, the fourth bevel gear 46 is sleeved at the outer side of a transmission shaft 42, the rotation of the fourth bevel gear 46 drives the transmission shaft 42 to rotate, a plurality of second bevel gears 40 are fixedly sleeved on the transmission shaft 42 at equal intervals, the rotation of the transmission shaft 42 drives the second bevel gears 40 to rotate, the first bevel gears 39 are meshed with the second bevel gears 40, the rotation of the second bevel gears 40 drives the first bevel gears 39 to rotate, a screw 38 and the first bevel gears 39 are fixedly inserted in the first bevel gears 39, the rotation of the first bevel gears 39 drives the screw 38 to rotate, and in the whole process, the bevel gear rack 43 provides support for each part.
The working principle of the device is as follows: the MTBE solution flows into the reaction tank 1 through the guide pipe 7, the MTBE solution flows into the sample pipe 10 through the through hole 8 in the guide pipe 7, at the moment, the concentration detector 11 hung at the bottom of the sample tank detects the concentration of the MTBE solution to be treated at this time, after the data are transmitted to the controller, the controller is electrically connected with the concentration detector 11, the controller receives signals and controls the heating component 21 or the cooling mechanism 12 to feed back, when the concentration of the MTBE solution is too low, namely the content of isobutene in the raw material C4 is less than 10%, at the outlet of the etherification reactor, the reaction heat release is not enough to enable the bed temperature to rise to the bubble point of the corresponding reaction material under the operating pressure, the reaction material cannot be vaporized, at the moment, the controller controls the heating mechanism 22MTBE solution to heat, and the reaction of the reaction material is promoted; when the concentration of the MTBE solution is too high, i.e. the content of isobutene in the starting C4 is very high, for example greater than 40%, the high-concentration isobutene is converted into the heat evolved by the MTBE, so that not only is all the methanol-C4 azeotrope and all the remaining C4 evaporated, but also the remaining heat, which is expressed as a further increase in the bed temperature, is present. If the bed temperature is too high, the result is that the converted MTBE is allowed to react in the reverse direction by the catalyst, i.e., the MTBE decomposition reaction, so that the controller controls the temperature reduction mechanism 12 to cool the MTBE solution so that the MTBE solution does not react in the reverse direction. In the process, the MTBE solution injected into the reaction tank 1 through the flow guide pipe 7 and the feed inlet 2 is subjected to corresponding temperature increase or decrease according to the concentration thereof, and finally the MTBE solution after heat exchange treatment is discharged through the discharge outlet 3. Because the temperature of the heat exchange device needs to be changed between high temperature and low temperature, the dynamic sealing material adopted at the mechanical mechanism connected with the reaction tank 1 adopts a packing sealing ring, the dynamic sealing technology is mature at present, and the description is not repeated.
When MTBE solution concentration was too high, heat exchange device mainly cooled down the processing to MTBE solution, and the concrete expression is: the temperature rising assembly 21 stops working, the temperature reducing mechanism 12 starts to operate, water-cooling liquid flows into the inner cavity of the snake-shaped flat pipe 13 through the liquid inlet 15 after being controlled by the flow regulating valve 18, the water-cooling liquid flowing into the inner cavity of the snake-shaped flat pipe 13 flows along the inner cavity of the snake-shaped flat pipe 13, and finally the water-cooling liquid is baffled to the liquid outlet 16 through the reversing pipe 17, in the whole process, the water-cooling liquid exchanges heat with the MTBE solution through the snake-shaped flat pipe 13, so that the temperature of the MTBE solution in the reaction tank 1 is reduced, the flow rate of the water-cooling liquid is controllable due to the flow regulating valve 18, when the temperature of the MTBE solution in the reaction tank 1 is too high, the MTBE solution needs to be rapidly reduced in a large scale, the flow rate of the water-cooling liquid is accelerated, a large amount of heat energy is rapidly taken away, the MTBE solution is rapidly reduced in a large scale, when the temperature of the MTBE solution in the reaction tank 1 exceeds the optimal temperature, the rapid temperature reduction is not needed, the controller controls the flow regulating valve 18 to slow down the flow rate of the water-cooling liquid, and the MTBE solution is reduced in a small scale.
When the concentration of the MTBE solution is too low, the heat exchange device mainly heats the MTBE solution, and the specific expression is as follows: when the two output shafts 44 start to rotate, the third bevel gear 45 sleeved at the outer end of the output shafts 44 starts to rotate, the fourth bevel gear 46 is meshed with the third bevel gear 45, the third bevel gear 45 rotates to drive the fourth bevel gear 46 to rotate, the fourth bevel gear 46 is sleeved at the outer side of the transmission shaft 42, the transmission shaft 42 is fixedly sleeved with a plurality of second bevel gears 40 at equal intervals, the transmission shaft 42 rotates to drive the second bevel gears 40 to rotate, the first bevel gears 39 are meshed with the second bevel gears 40, the second bevel gears 40 rotate to drive the first bevel gears 39 to rotate, the screw 38 and the first bevel gears 39 are fixedly inserted in the first bevel gears 39, the screw 38 rotates to drive the screw 38 to rotate, in the whole process, the bevel gear rack 43 provides support for each part, when the screw 38 rotates, the two sliders 37 and the screw 37 are fixedly inserted in the first bevel gears 39, and the two sliders 35 move in the direction of the vertical direction of the two sliders 35 and are hinged to the connection plate 35, and the screw 38 moves to the connection plate 35. One end and the support base 28 fixed connection of heat-conducting plate 23 support base 28 and move in vertical direction and can promote heat-conducting plate 23 and remove, spacing when the other end of heat-conducting plate 23 removes the centre of a circle to snakelike flat pipe 13 department of buckling, heat-conducting plate 23 can also exert the effect of baffling board this moment: increase turbulence, increase reaction stroke and greatly increase heat exchange effect. In the moving process of the heat conducting plate 23, the heater 32 starts to work, the series strip 33 is fixedly connected with the output end of the heater 32, the series strip 33 is heated by the heater 32 to rise in temperature, the series strip 33 passes through the heating rod 31, the temperature of the heating rod 31 is raised along with heat exchange, the heating rod 31 is arranged in the heating groove 26 of the heat conducting plate 23, the heat conducting plate 23 is heated by the conduction of the heating rod 31, and finally the heat conducting plate 23 is heated to heat the MTBE solution in the reaction tank 1, but in the process of temperature rise of the heat conducting plate 23, due to the effect of thermal expansion and cold contraction, air in a connecting gap between the supporting base 28 and the heat conducting plate 23 can be heated and expanded, at the moment, small-amplitude displacement can be generated between the heat conducting plate 23 and the supporting base 28, one end of the accommodating tube 27 is fixedly connected with the supporting base 28, the other end of the accommodating tube is slidably connected with the limiting groove 24, when the heated and expanded hot air pushes the heat conducting plate 23 to move, the accommodating tube 27 can provide accommodating amount, and damage to the heat conducting plate 23 and the supporting base 28 due to thermal contraction can be avoided. Meanwhile, the heat conducting plate 23 is limited by the limiting part 29 of the supporting base 28 in small-amplitude displacement generated by expansion with heat and contraction with cold.
The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A heat exchange apparatus for an MTBE mixed phase bed reactor, comprising:
the reaction tank (1) is arranged in a horizontal state, a feed inlet (2) is formed in one end of the reaction tank (1), a socket (4) is formed in the other end of the reaction tank (1), and a discharge outlet (3) is formed in the position, far away from the feed inlet (2), of the lower end of the reaction tank (1);
the two first supporting frames (5) are respectively and fixedly connected with the two vertical surfaces of the reaction tank (1);
one end of the flow guide pipe (7) is fixedly connected with the feed inlet (2), and the other end of the flow guide pipe is fixedly connected with the MTBE reaction device;
the concentration detection mechanism (9) is arranged below the guide pipe (7), and the concentration detection mechanism (9) is fixedly connected with the guide pipe (7);
the cooling mechanism (12) comprises a snakelike flat pipe (13), the snakelike flat pipe (13) is arranged inside the reaction tank (1), and two ends of the snakelike flat pipe (13) penetrate through the spigots (4) of the reaction tank (1);
heating up subassembly (21), including drive mechanism, a plurality of elevating system (34) and a plurality of elevating system (22), drive mechanism and retort (1) shaping have the face fixed connection of socket (4), both sides about a plurality of elevating system (34) set up retort (1), every elevating system (34) all are connected with drive mechanism, a plurality of elevating system (22) and a plurality of elevating system (34) one-to-one are connected, wherein, every elevating system (22) all include heat-conducting plate (23), heat-conducting plate (23) can transfer the heat, also can exert the effect of baffling board.
2. The heat exchange device for the MTBE mixed phase bed reactor according to claim 1, wherein a through hole (8) is formed at the lower end of the inlet of the flow guide pipe (7), a second support frame (6) is arranged between the flow guide pipe (7) and the first support frame (5), the second support frame (6) can support the flow guide pipe (7), the concentration detection mechanism (9) comprises a sample pipe (10) and a concentration detector (11), the sample pipe (10) is vertically hung at the lower end of the through hole (8), and the concentration detector (11) is vertically hung at the lower end of the sample pipe (10).
3. The heat exchange device for the MTBE mixed phase bed reactor according to claim 1, wherein the temperature reduction mechanism (12) further comprises a flow regulating valve (18), a third support frame (19) and a plurality of fourth support frames (20), the flow regulating valve (18) is arranged at the side of the reaction tank (1), the valve port of the flow regulating valve (18) is fixedly sleeved with one end of the snake-shaped flat tube (13) close to the socket (4), the third support frame (19) is arranged at the side of the reaction tank (1), one end of the third support frame (19) is fixedly connected with the reaction tank (1), the other end of the third support frame (19) is fixedly connected with the flow regulating valve (18), and the third support frame (19) can ensure that the flow regulating valve (18) does not move.
4. A heat exchange device for an MTBE mixed phase bed reactor according to claim 3, wherein the serpentine flat tube (13) comprises a partition plate (14) and a reversing tube (17), the partition plate (14) is disposed in the middle of the inner cavity of the serpentine flat tube (13), the partition plate (14) divides the inner cavity of the serpentine flat tube (13) into two cavities, one of the cavities has a port sleeved with the valve port of the flow regulating valve (18), the other cavity has a port called an inlet port (15), the other cavity has a port called an outlet port (16), the reversing tube (17) is a hollow semicircular sleeve, and the reversing tube (17) is disposed at an end of the serpentine flat tube (13) away from the inlet port (15) and the outlet port (16).
5. The heat exchange device of claim 1, wherein the heating mechanism (22) further comprises a support base (28), a plurality of heating rods (31), a plurality of series-connected strips (33) and two heaters (32), the support base (28) is arranged in a vertical state, the support base (28) penetrates through the reaction tank (1) and is in sliding connection with the reaction tank (1), a limit portion (29) is formed on the support base (28), a plurality of heating grooves (26) are formed on the heat conduction plate (23) at equal intervals along the long side direction, the plurality of heating rods (31) are arranged in the heating grooves (26), two sliding grooves (25) are further formed on the heat conduction plate (23) along the long side direction, the limit portion (29) of the support base (28) is in sliding connection with the two sliding grooves (25), the plurality of series-connected strips (33) penetrate through the heating rods (31) at equal intervals, the two heaters (32) are arranged on two sides of the heat conduction plate (23), and output ends of the two heaters (32) are fixedly connected with two ends of the plurality of series-connected strips (33).
6. The heat exchange device for the MTBE mixed phase bed reactor according to claim 5, wherein a limiting groove (24) is further formed on the heat conducting plate (23) along the outer periphery of the heating groove (26), the heating mechanism (22) further comprises a plurality of accommodating pipes (27), a connecting part (30) is further formed on the supporting base (28), one end of each accommodating pipe (27) is slidably connected with the limiting groove (24), and the other end of each accommodating pipe is fixedly connected with the connecting part (30).
7. The heat exchange device of claim 1, wherein the lifting mechanism (34) comprises a screw (38), four connecting plates (35), two supporting seats (36) and two sliding blocks (37), wherein the two supporting seats (36) are symmetrically arranged on the reaction tank (1), the two supporting seats (36) are fixedly connected with the reaction tank (1), the screw (38) horizontally penetrates through the two supporting seats (36), two ends of the screw (38) are connected with the supporting seats (36) in a rolling manner, the two sliding blocks (37) are horizontally arranged outside the screw (38), the two sliding blocks (37) are connected with the screw (38) in a threaded manner, the four connecting plates (35) are in a group in pairs, the two groups of connecting plates (35) are symmetrically arranged, one end of each connecting plate (35) is hinged to the sliding block (37), and the other end of each connecting plate is hinged to the supporting base (28).
8. The heat exchange device for the MTBE mixed phase bed reactor according to claim 1, wherein the transmission mechanism comprises a double-shaft motor (47) and two output shafts (44), the double-shaft motor (47) is arranged on the side wall of the reaction tank (1) where the socket (4) is formed, the double-shaft motor (47) is fixedly connected with the reaction tank (1) through a motor frame, two output ends of the double-shaft motor (47) are arranged in a vertical state, the two output shafts (44) are arranged in a vertical state, and one ends of the two output shafts (44) are fixedly connected with the output ends of the double-shaft motor (47) through a coupler.
9. The heat exchange device for the MTBE mixed phase bed reactor according to claim 1, wherein the lifting mechanism (34) further comprises a first bevel gear (39) and a second bevel gear (40), the first bevel gear (39) is fixedly sleeved at one end of the screw (38), the second bevel gear (40) is engaged with the first bevel gear (39), the power mechanism (41) further comprises two transmission shafts (42), two bevel gear racks (43), two third bevel gears (45) and two fourth bevel gears (46), because the lifting mechanisms (34) are symmetrically arranged at the upper and lower sides of the reaction tank (1), the two transmission shafts (42) and the second bevel gears (40) in the plurality of lifting mechanisms (34) at both sides are fixedly inserted, the bevel gear racks (43) are sleeved at the outer sides of the transmission shafts (42), the other ends of the two output shafts (44) penetrate through the bevel gear racks (43) and extend into the bevel gear racks (43), the third bevel gears (45) are fixedly sleeved at one ends of the output shafts (44) extending into the bevel gear racks (43), and one ends of the third bevel gears (45) are engaged with the third bevel gears (42) and the third bevel gears (46).
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| CN212512594U (en) * | 2020-04-27 | 2021-02-09 | 咸阳石油化工有限公司 | Dual-effect feeding preheater of MTBE (methyl tert-butyl ether) device |
| CN213931649U (en) * | 2020-11-29 | 2021-08-10 | 东明前海化工有限公司 | MTBE product cooler |
| CN215725297U (en) * | 2021-06-24 | 2022-02-01 | 山东神驰石化有限公司 | Be applied to cooling device of MTBE device |
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| US5177289A (en) * | 1982-11-17 | 1993-01-05 | Chemical Research & Licensing Company | Method for conducting exothermic reactions |
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Denomination of invention: A heat exchange device for MTBE mixed bed reactor Granted publication date: 20230324 Pledgee: Agricultural Bank of China Limited Dongzhi County Branch Pledgor: Anhui Yifeng Petrochemical Co.,Ltd. Registration number: Y2024980008753 |
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