CN112023861B - Energy-saving NMP reactor - Google Patents
Energy-saving NMP reactor Download PDFInfo
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- CN112023861B CN112023861B CN202010960285.9A CN202010960285A CN112023861B CN 112023861 B CN112023861 B CN 112023861B CN 202010960285 A CN202010960285 A CN 202010960285A CN 112023861 B CN112023861 B CN 112023861B
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- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000006243 chemical reaction Methods 0.000 claims abstract description 38
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000002156 mixing Methods 0.000 claims abstract description 32
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 239000007795 chemical reaction product Substances 0.000 claims abstract description 13
- 239000012535 impurity Substances 0.000 claims abstract description 12
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 238000005192 partition Methods 0.000 claims abstract description 9
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 239000002808 molecular sieve Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 2
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 abstract description 16
- 230000007547 defect Effects 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 238000000746 purification Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 238000004134 energy conservation Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 238000004176 ammonification Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- -1 petrifaction Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- 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
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses an energy-saving NMP (N-methyl pyrrolidone) reactor which comprises a reactor body, a driving motor and a rotating main shaft, wherein the driving motor is arranged at the top of the reactor body, the rotating main shaft is arranged at the output end of the driving motor, a partition plate and a heat conducting plate are arranged in the reactor body, the reactor body is sequentially divided into a preheating cavity, a reaction cavity and a heating cavity from top to bottom by the partition plate and the heat conducting plate, two symmetrical feeding coils are arranged in the preheating cavity, the upper ports of the two feeding coils are respectively connected with a GBL raw material feeding pipe and a methylamine feeding pipe, the lower ports of the feeding coils are communicated with a mixing tank through a discharging pipeline, and U-shaped stirring wheels are symmetrically arranged at two sides of the downward extending end of the rotating main shaft penetrating through the mixing tank. The invention overcomes the defects of the prior art, has reasonable design, can discharge impurities in reaction products through nitrogen, and can recycle methylamine after purification and filtration, thereby greatly improving the resource utilization rate and having higher social use value and application prospect.
Description
Technical Field
The invention relates to the technical field of chemical production, in particular to an energy-saving NMP reactor.
Background
NMP is N-methyl pyrrolidone (NMP), which is a high boiling point and environment friendly solvent, and has the advantages of low viscosity, high chemical stability, high heat stability, high polarity, low volatility, infinite miscibility with water and many organic solvents, etc. The market application field of N-methyl pyrrolidone is mainly concentrated in industries such as lithium batteries, circuit boards, insulating materials, petrifaction, medicines, pesticides, cleaning, macromolecules and the like.
At present, NMP is produced mainly through an ammonification reaction between GBL and monomethylamine, because the ammonification reaction is a reversible reaction, the reaction condition is harsh, NMP is required to be produced at the temperature of about 280 ℃, the existing NMP reactor mostly integrates heating, feeding and reaction, the reaction materials enter the reactor and then react at the set temperature, the materials need to be heated to the reaction temperature after entering, and the phenomena of uneven heating and low mixing degree exist in the rapid heating process, so that the yield of reaction products is low, side reactions are more, and the yield of NMP is directly influenced; in addition, the monomethylamine is fed in a liquid phase, and is quickly changed into monomethylamine gas in a high-temperature environment after being fed, the monomethylamine gas is easily desorbed from the GBL liquid phase and is positioned above the surface of the monomethylamine gas, so that the mixing degree of the monomethylamine gas and the GBL liquid phase is directly influenced, impurities are often generated in reaction products, the quality of the products is greatly reduced if the products are not filtered and purified, and meanwhile, the heat is not well utilized in the heating reaction.
Accordingly, the inventor has the problem of providing an energy-saving NMP reactor for achieving the purpose of having more practical value by keeping the experience of the design development and the actual production in the related industry for many years and researching and improving the existing structure and the defects.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the present invention provides an energy-saving NMP reactor.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides an energy-saving NMP reactor, includes reactor body, driving motor, rotatory main shaft, driving motor installs in the top of reactor body, rotatory main shaft sets up in driving motor's output, this internal baffle and the heat-conducting plate of being equipped with of reactor, baffle and heat-conducting plate divide into the reactor body top-down in proper order and preheat chamber, reaction chamber and heating chamber, preheat the intracavity and be equipped with two symmetrical feeding coil pipes, two feeding coil pipe's upper port is connected with GBL raw materials inlet pipe and methylamine inlet pipe respectively, feeding coil pipe's lower port has the mixed groove through ejection of compact pipeline intercommunication, the bottom of mixed groove is fixed in the baffle, rotatory main shaft runs through the bilateral symmetry of mixed groove downwardly extending end and is equipped with U type agitator wheel, be connected with the connecting axle between the lateral wall of U type agitator wheel and the rotatory main shaft, the lower extreme outer wall of rotatory main shaft has cup jointed the inlet connection pipe, the bottom one side intercommunication of inlet connection pipe has the intake pipe, and the intake pipe outwards extends the end and is equipped with nitrogen gas generating device, rotatory main shaft's bottom is equipped with first pipeline, and the upper end intercommunication of first pipeline has the second pipeline, and the first pipeline has a pipeline, and the first pipeline is located the even distribution of a plurality of third pipeline of ventilation channels, the first pipeline is located the even distribution of a plurality of ventilation channels.
Preferably, the upper end wall of the reaction cavity is communicated with a steam pipeline, one end of the steam pipeline is communicated with a condenser, an outlet of the condenser is communicated with a molecular sieve through a first connecting pipe, and an outlet of the molecular sieve is communicated with a methylamine feeding pipe through a second connecting pipe.
Preferably, a booster pump is installed on the pipeline of the second connecting pipe.
Preferably, the outer wall of the feeding coil is sleeved with a preheating jacket, a communicating pipe is communicated between two adjacent preheating jackets, the preheating jackets at the upper end are respectively communicated with a first diversion pipeline and a second diversion pipeline, the first diversion pipeline and the second diversion pipeline are communicated with the bottom of the heating cavity, the preheating jackets at the lower end are communicated with a return pipe, the return pipe is communicated with the side wall at the upper end of the heating cavity, a first oil pump is installed on a pipeline of the first diversion pipeline, and a second oil pump is installed on a pipeline of the second diversion pipeline.
Preferably, T-shaped mixing rods are symmetrically arranged at two sides of the outer wall of the rotary main shaft and positioned in the mixing groove.
Preferably, oblique blocks are symmetrically arranged on two sides of the bottom of the mixing tank, and the upper end faces of the oblique blocks are smooth surfaces.
Preferably, the outer wall of the joint of the rotary main shaft and the air inlet connecting pipe is sleeved with a bearing.
Preferably, one side of the outer wall of the lower end of the reaction cavity is communicated with a feed opening, and a valve is arranged on a pipeline of the feed opening.
Compared with the prior art, the invention has the beneficial effects that:
1. the reaction raw materials enter a reaction cavity for further mixing reaction after being mixed for the first time by a mixing tank, so that the GBL and the methylamine raw materials are uniformly mixed, and the reaction is more complete;
2. the method comprises the steps that while the reaction raw materials are stirred, a nitrogen generating device sprays air to the materials through a first air pipeline, a second air pipeline, a third air pipeline and a through hole, the nitrogen and volatile impurities in reaction products are fully mixed and contacted in a reaction cavity, and finally the nitrogen takes away the volatile impurities in the reaction products;
3. The mixed methylamine steam enters a condenser from a steam pipeline to be cooled and liquefied, and then flows back to a methylamine feed pipe after being filtered and purified by a molecular sieve, so that the effect of recycling resources is achieved;
4. The outside of the feeding coil pipe is sleeved with a preheating jacket, and the heat conduction oil in the heating cavity enters the preheating jacket through a flow guide pipeline under the action of the oil pump, so that the reaction raw materials are preheated, and the heat conduction oil flows back to the heating cavity through a return pipe after being preheated, thereby further achieving the effects of energy conservation and consumption reduction and greatly improving the resource utilization rate.
In conclusion, the invention overcomes the defects of the prior art, has reasonable design, can discharge impurities in reaction products through nitrogen, and can recycle methylamine after purification and filtration, thereby greatly improving the resource utilization rate and having higher social use value and application prospect.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a main structure in embodiment 1 of the present invention;
FIG. 2 is a schematic view showing the structure of a mixing tank and a U-shaped stirring wheel in example 1 of the present invention;
FIG. 3 is a schematic diagram of the main structure of embodiment 2 of the present invention;
FIG. 4 is a schematic view showing the structure of a mixing tank and a U-shaped stirring wheel in example 2 of the present invention;
FIG. 5 is an enlarged schematic view of the structure A of the present invention;
In the figure: the reactor comprises a reactor body 1, a driving motor 2, a rotating main shaft 3, a partition plate 4, a heat conducting plate 5, a heater 6, a feeding coil pipe 7, a preheating jacket 8, a communicating pipe 9, a GBL raw material feeding pipe 10, a mixing tank 11, an inclined block 12, a methylamine feeding pipe 13, a U-shaped stirring wheel 14, a connecting shaft 15, a first ventilating pipe 16, a second ventilating pipe 17, a third ventilating pipe 18, a through hole 19, a T-shaped mixing rod 20, an air inlet connecting pipe 21, an air inlet pipe 22, a nitrogen generating device 23, a bearing 24, a first guiding pipe 25, a first oil pump 26, a second guiding pipe 27, a second oil pump 28, a steam pipe 29, a condenser 30, a first connecting pipe 31, a molecular sieve 32, a second connecting pipe 33, a booster pump 34, a feed opening 35, a valve 36, a return pipe 37 and a discharge pipe 38.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
Referring to fig. 1-2 and fig. 5, an energy-saving NMP reactor comprises a reactor body 1, a driving motor 2, a rotating main shaft 3, wherein the driving motor 2 is installed at the top of the reactor body 1, the rotating main shaft 3 is arranged at the output end of the driving motor 2, a partition plate 4 and a heat conducting plate 5 are arranged in the reactor body 1, the reactor body 1 is sequentially divided into a preheating cavity, a reaction cavity and a heating cavity from top to bottom by the partition plate 4 and the heat conducting plate 5, two symmetrical feeding coils 7 are arranged in the preheating cavity, the upper ports of the two feeding coils 7 are respectively connected with a GBL raw material feeding pipe 10 and a methylamine feeding pipe 13, the lower ports of the feeding coils 7 are communicated with a mixing tank 11 through a discharging pipeline 38, the mixing tank 11 is fixed at the bottom of the partition plate 4, the rotating main shaft 3 penetrates through the mixing tank 11, two sides of the downward extending end are symmetrically provided with U-shaped stirring wheels 14, a connecting shaft 15 is connected between the outer side wall of the U-shaped stirring wheels 14 and the rotating main shaft 3, the lower end outer wall of the rotating main shaft 3 is sleeved with an air inlet 21, one side of the bottom of the reactor body 21 is communicated with an air inlet pipe 22, the air inlet pipe 22 is arranged at the outer extending end of the preheating cavity, the air inlet pipe 22 is provided with a nitrogen generating device 23, the outer extending end, the first end of the rotating main shaft 3 is provided with a first channel 16 is communicated with a second channel 18, the heating channel is communicated with a third channel 18, the heating channel is communicated with a first channel 18, the heating channel is communicated with a second channel 16, and a second channel 18 is communicated with a heating channel 16, and a third channel 18 is communicated with a heating channel 18, and a third channel 18 is communicated with a heating channel 16, and a third channel 18 is communicated with a communicating channel 18.
The upper end wall of the reaction cavity is communicated with a steam pipeline 29, one end of the steam pipeline 29 is communicated with a condenser 30, an outlet of the condenser 30 is communicated with a molecular sieve 32 through a first connecting pipe 31, an outlet of the molecular sieve 32 is communicated with a methylamine feed pipe 13 through a second connecting pipe 33, a booster pump 34 is arranged on a pipeline of the second connecting pipe 33, mixed steam generated in the reaction cavity enters the condenser 30 through the steam pipeline 29 for heat exchange under the pressure increase of the booster pump 34, then enters the molecular sieve 32 through the first connecting pipe 31 for purifying and filtering, impurities are removed and dehydration is carried out, and the filtered methylamine flows back to the methylamine feed pipe 13 and enters the reaction cavity for recycling, so that resources are saved.
The outer wall of the feeding coil 7 is sleeved with a preheating jacket 8, two adjacent preheating jackets 8 are communicated with a communicating pipe 9, the preheating jackets 8 at the upper ends are respectively communicated with a first diversion pipeline 25 and a second diversion pipeline 27, the first diversion pipeline 25 and the second diversion pipeline 27 are communicated with the bottom of a heating cavity, the preheating jacket 8 at the lower end is communicated with a return pipe 37, the return pipe 37 is communicated with the side wall at the upper end of the heating cavity, a first oil pump 26 is arranged on a pipeline of the first diversion pipeline 25, a second oil pump 28 is arranged on a pipeline of the second diversion pipeline 27, and the heater 6 heats heat conduction oil, so that GBL and methylamine heating reaction is realized, the heated heat conduction oil enters the preheating jacket 8 through the first diversion pipeline 25 and the second diversion pipeline 27, and the preheating jacket 8 can preheat GBL and methylamine materials, so that the effects of energy conservation and consumption reduction are achieved.
Wherein, the bottom bilateral symmetry of mixing tank 11 is equipped with sloping block 12, and the up end of sloping block 12 is smooth surface, can reduce the speed that the material falls through setting up sloping block 12.
Wherein, the outer wall of the junction of the rotary main shaft 3 and the air inlet connecting pipe 21 is sleeved with a bearing 24, the friction force between the rotary main shaft 3 and the air inlet connecting pipe 21 is reduced by arranging the bearing 24, and the rotation of the rotary main shaft 3 is ensured not to influence the fixation of the air inlet connecting pipe 21.
Wherein, one side of the outer wall of the lower end of the reaction cavity is communicated with a feed opening 35, a valve 36 is arranged on a pipeline of the feed opening 35, and reaction products are discharged outwards through the feed opening 35 after the valve 36 is opened.
Working principle: in the invention, raw materials respectively enter through a GBL raw material feeding pipe 10 and a methylamine feeding pipe 13, enter a mixing tank 11 through a discharging pipeline 38 for mixing, and enter a reaction cavity after being mixed through the mixing tank 11;
the heater 6 heats the heat conduction oil in the heating cavity, so that the heating of the reaction materials is realized, and at the moment, the driving motor 2 drives the U-shaped stirring wheel 14 to rotate through the rotating main shaft 3, so that the materials can fully react;
the preheating jacket 8 is sleeved outside the feeding coil 7, and the heat conduction oil in the heating cavity enters the preheating jacket 8 through the flow guide pipeline under the action of the oil pump, so that the reaction raw materials are preheated, and the heat conduction oil flows back to the heating cavity through the return pipe 37 after being preheated, thereby further achieving the effects of energy conservation and consumption reduction and greatly improving the resource utilization rate;
The nitrogen generating device 23 blows air to the air inlet connecting pipe 21 through the air inlet pipe 22, and enters the second air passage 17 through the first air passage 16, then enters the third air passage 18 through the second air passage 17, and then is sprayed to the materials through the through holes 19, at the moment, the nitrogen and the volatile impurities in the reaction products are fully mixed and contacted in the reaction cavity, and finally the nitrogen takes away the volatile impurities in the reaction products, and mixed methylamine steam enters the condenser 30 from the steam pipe 29 for cooling and liquefying, and then flows back to the methylamine feed pipe 13 after being filtered and purified through the molecular sieve 32, so that the effect of recycling resources is achieved.
Example 2
Referring to fig. 3-5, the difference between this embodiment and embodiment 1 is that the T-shaped mixing bars 20 are symmetrically disposed at two sides of the outer wall of the rotating spindle 3 and inside the mixing tank 11, and the rotating spindle 3 drives the T-shaped mixing bars 20 to stir and mix the reaction materials, so that the reaction is more complete.
Other undescribed structures refer to embodiment 1.
Working principle: in the invention, raw materials respectively enter through the GBL raw material feeding pipe 10 and the methylamine feeding pipe 13 and enter the mixing tank 11 through the discharging pipeline 38 for mixing, at the moment, the driving motor 2 is started, the driving motor 2 drives the rotating main shaft 3 to rotate, and the rotating main shaft 3 drives the T-shaped mixing rod 20 to rotate, so that the GBL raw materials and the methylamine raw materials are uniformly mixed;
the heater 6 heats the heat conduction oil in the heating cavity, so that the heating of the reaction materials is realized, and at the moment, the driving motor 2 drives the U-shaped stirring wheel 14 to rotate through the rotating main shaft 3, so that the materials can fully react;
the preheating jacket 8 is sleeved outside the feeding coil 7, and the heat conduction oil in the heating cavity enters the preheating jacket 8 through the flow guide pipeline under the action of the oil pump, so that the reaction raw materials are preheated, and the heat conduction oil flows back to the heating cavity through the return pipe 37 after being preheated, thereby further achieving the effects of energy conservation and consumption reduction and greatly improving the resource utilization rate;
The nitrogen generating device 23 blows air to the air inlet connecting pipe 21 through the air inlet pipe 22, and enters the second air passage 17 through the first air passage 16, then enters the third air passage 18 through the second air passage 17, and then is sprayed to the materials through the through holes 19, at the moment, the nitrogen and the volatile impurities in the reaction products are fully mixed and contacted in the reaction cavity, and finally the nitrogen takes away the volatile impurities in the reaction products, and mixed methylamine steam enters the condenser 30 from the steam pipe 29 for cooling and liquefying, and then flows back to the methylamine feed pipe 13 after being filtered and purified through the molecular sieve 32, so that the effect of recycling resources is achieved.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (3)
1. The utility model provides an energy-saving NMP reactor, includes reactor body (1), driving motor (2), rotatory main shaft (3), driving motor (2) are installed in the top of reactor body (1), and rotatory main shaft (3) set up in the output of driving motor (2), its characterized in that: the reactor comprises a reactor body (1), wherein a partition plate (4) and a heat conducting plate (5) are arranged in the reactor body (1), the partition plate (4) and the heat conducting plate (5) divide the reactor body (1) into a preheating cavity, a reaction cavity and a heating cavity from top to bottom in sequence, two symmetrical feeding coils (7) are arranged in the preheating cavity, upper ports of the two feeding coils (7) are respectively connected with a GBL raw material feeding pipe (10) and a methylamine feeding pipe (13), lower ports of the feeding coils (7) are communicated with a mixing tank (11) through a discharging pipeline (38), the mixing tank (11) is fixed at the bottom of the partition plate (4), U-shaped stirring wheels (14) are symmetrically arranged on two sides of a downward extending end of the rotating main shaft (3) penetrating through the mixing tank (11), a connecting shaft (15) is connected between the outer side wall of the U-shaped stirring wheels (14) and the rotating main shaft (3), an air inlet connecting pipe (21) is sleeved on the outer wall of the lower end of the rotating main shaft (3), one side of the bottom of the connecting pipe (21) is communicated with an air inlet pipe (22), the lower end of the air inlet pipe (22) is communicated with an air inlet pipe (23), the outer end of the air inlet pipe (22) is provided with a nitrogen gas generating device (23), the bottom of the rotating main shaft (3) is communicated with a second pipeline (16), one end, far away from the first air pipeline (16), of the second air pipeline (17) is communicated with a third air pipeline (18), the third air pipeline (18) is positioned in the U-shaped stirring wheel (14), a plurality of through holes (19) are uniformly distributed on the outer wall of the third air pipeline (18), and a heater (6) is arranged in the heating cavity;
The nitrogen generating device (23) blows air to the air inlet connecting pipe (21) through the air inlet pipe (22), enters the second air channel (17) through the first air channel (16), enters the third air channel (18) through the second air channel (17), and is sprayed to materials through the through hole (19), at the moment, the nitrogen and the volatile impurities in the reaction product are fully mixed and contacted in the reaction cavity, finally, the nitrogen takes away the volatile impurities in the reaction product, mixed methylamine steam enters the condenser (30) from the steam pipeline (29) for cooling and liquefying, and flows back to the methylamine feed pipe (13) after being filtered and purified through the molecular sieve (32);
The upper end wall of the reaction cavity is communicated with a steam pipeline (29), one end of the steam pipeline (29) is communicated with a condenser (30), an outlet of the condenser (30) is communicated with a molecular sieve (32) through a first connecting pipe (31), and an outlet of the molecular sieve (32) is communicated with a methylamine feeding pipe (13) through a second connecting pipe (33); a booster pump (34) is arranged on the pipeline of the second connecting pipe (33);
The outer wall of the feeding coil pipe (7) is sleeved with a preheating jacket (8), a communicating pipe (9) is communicated between two adjacent preheating jackets (8), the preheating jacket (8) at the upper end is respectively communicated with a first diversion pipeline (25) and a second diversion pipeline (27), the first diversion pipeline (25) and the second diversion pipeline (27) are communicated with the bottom of the heating cavity, the preheating jacket (8) at the lower end is communicated with a return pipe (37), the return pipe (37) is communicated with the upper end side wall of the heating cavity, a first oil pump (26) is installed on a pipeline of the first diversion pipeline (25), and a second oil pump (28) is installed on a pipeline of the second diversion pipeline (27);
T-shaped mixing rods (20) are symmetrically arranged at two sides of the outer wall of the rotary main shaft (3) and positioned in the mixing groove (11); oblique blocks (12) are symmetrically arranged on two sides of the bottom of the mixing groove (11), and the upper end face of each oblique block (12) is a smooth surface.
2. An energy efficient NMP reactor according to claim 1, characterized in that: the outer wall of the joint of the rotary main shaft (3) and the air inlet connecting pipe (21) is sleeved with a bearing (24).
3. An energy efficient NMP reactor according to claim 1, characterized in that: one side of the outer wall of the lower end of the reaction cavity is communicated with a feed opening (35), and a valve (36) is arranged on a pipeline of the feed opening (35).
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| CN113578238A (en) * | 2021-08-11 | 2021-11-02 | 安徽晟捷新能源科技有限公司 | Tower reactor for synthesizing NMP |
| CN113713730B (en) * | 2021-09-13 | 2023-12-22 | 山东高密高源化工有限公司 | Preparation and blending device for preparing high-purity sodium chlorite |
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| CN115591512B (en) * | 2022-12-15 | 2023-07-07 | 联仕(昆山)化学材料有限公司 | Mixing device in nitrogen methyl pyrrolidone preparation process |
| CN116514750A (en) * | 2023-03-24 | 2023-08-01 | 安徽秀朗新材料科技有限公司 | Production process of 2, 3',4' -biphenyl tetracarboxylic dianhydride |
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