CN117797509A - Recovery unit of cyclohexylamine in vulcanization accelerator CBS production process - Google Patents
Recovery unit of cyclohexylamine in vulcanization accelerator CBS production process Download PDFInfo
- Publication number
- CN117797509A CN117797509A CN202410223927.5A CN202410223927A CN117797509A CN 117797509 A CN117797509 A CN 117797509A CN 202410223927 A CN202410223927 A CN 202410223927A CN 117797509 A CN117797509 A CN 117797509A
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- Prior art keywords
- tank body
- cyclohexylamine
- tank
- baffle
- rectifying
- Prior art date
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- PAFZNILMFXTMIY-UHFFFAOYSA-N cyclohexylamine Chemical compound NC1CCCCC1 PAFZNILMFXTMIY-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000004073 vulcanization Methods 0.000 title claims abstract description 19
- 238000011084 recovery Methods 0.000 title abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 239000012528 membrane Substances 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 43
- 238000004064 recycling Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 23
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 11
- 239000002245 particle Substances 0.000 description 8
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000002893 slag Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000012452 mother liquor Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000010413 mother solution Substances 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000012990 dithiocarbamate Substances 0.000 description 1
- 150000004659 dithiocarbamates Chemical class 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- -1 tires Substances 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/14—Fractional distillation or use of a fractionation or rectification column
- B01D3/32—Other features of fractionating columns ; Constructional details of fractionating columns not provided for in groups B01D3/16 - B01D3/30
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention relates to a recovery device of cyclohexylamine in a vulcanization accelerator CBS production process, which relates to the field of separation and comprises a tank body, a rectifying tank, shi Moqi and a heating pipe, wherein a baffle is fixedly connected to the middle part in the tank body, a plurality of flow holes are arranged at intervals on the lower part of the baffle, and the pressure in the tank body at two sides of the baffle is different; a material containing cyclohexylamine is injected into a space of the tank body at one side of the baffle, a filter screen or a filter membrane is stuck on the membrane applicator, and Shi Moqi stretches into the tank body and is stuck to one side of the baffle close to the material, so that the filter screen or the filter membrane covers the flow hole; the rectifying tank is fixedly connected to the upper part of the tank body positioned at the other side of the baffle, the heating pipe penetrates into the tank body below the rectifying tank, and the heating pipe is heated to evaporate cyclohexylamine into the rectifying tank.
Description
Technical Field
The invention relates to the technical field of separation, in particular to a recycling device of cyclohexylamine in a vulcanization accelerator CBS production process.
Background
The vulcanization accelerator CBS (N-cyclohexyl-2-benzothiazole sulfenamide) is a highly active post-effect accelerator, has excellent scorch resistance, safe processing and short vulcanization time, and can improve the stretching stress of vulcanized rubber. Alkaline accelerators such as thiurams and dithiocarbamates enhance their activity. The method is mainly used for manufacturing industrial rubber products such as tires, rubber tubes, rubber shoes, cables and the like.
In the production process, the mother solution after washing contains a large amount of unreacted cyclohexylamine, and the boiling points of the cyclohexylamine and other impurities in the mother solution are different, so that the cyclohexylamine can be extracted in a distillation mode and then recycled. And because the mother liquor also contains a small amount of accelerator M particles, the particles are attached to the heating pipe by using the existing distiller, so that the heating efficiency of the heating pipe is reduced.
Accordingly, in view of the above shortcomings, it is desirable to provide a recovery apparatus for cyclohexylamine in the production process of vulcanization accelerators CBS.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to solve the technical problem that the long-term adhesion of a small amount of solid particles contained in mother liquor influences the heating efficiency of a heating pipe.
(II) technical scheme
In order to solve the technical problems, the invention provides a recovery device of cyclohexylamine in the production process of vulcanization accelerator CBS, which comprises a tank body, a rectifying tank, shi Moqi and a heating pipe, wherein a baffle is fixedly connected to the middle part in the tank body, a plurality of flow holes are arranged at intervals on the lower part of the baffle, and the pressure in the tank body at two sides of the baffle is different; a material containing cyclohexylamine is injected into a space of the tank body at one side of the baffle, a filter screen or a filter membrane is stuck on the membrane applicator, the mesh number of the filter screen or the filter membrane is more than or equal to 80 meshes, and Shi Moqi stretches into the tank body and is stuck to one side of the baffle close to the material, so that the filter screen or the filter membrane covers the flow holes; the rectifying tank is fixedly connected to the upper part of the tank body, which is positioned on the other side of the baffle, the heating pipe penetrates into the tank body below the rectifying tank, and the heating pipe heats to evaporate cyclohexylamine into the rectifying tank.
As a further illustration of the present invention, the flow holes are preferably located at the bottom of the baffle plate in a fan-shaped interval.
As a further explanation of the present invention, it is preferable that the membrane applicator comprises a main rod, a slide rod, a bottom rod and a support rod, one end of the main rod extends into the tank body and is abutted against the baffle plate, the bottom of the main rod is abutted against the bottom of the tank body, the slide rod is slidably connected to the main rod, one ends of the two arc-shaped bottom rods are respectively hinged to the main rod, the other ends of the bottom rods are hinged to one ends of the support rods, the other ends of the support rods are hinged to the slide rod so that the slide rod moves downwards to prop open the bottom rods through the support rods, the slide rod moves upwards to shrink the bottom rods through the support rods, and the filter screen or the filter membrane is fixedly connected to one sides of the main rod and the bottom rods close to the baffle plate.
As a further explanation of the invention, preferably, the bottom of the sliding rod is provided with a connecting block in a shape of a Chinese character 'men', both sides of the main rod are provided with limit grooves, and the inner sides of the connecting blocks are embedded into the limit grooves so that the sliding rod is in sliding connection with the main rod, and the supporting rod is hinged with the connecting blocks.
As a further explanation of the present invention, preferably, an arc-shaped hinge block is fixedly connected to the outside of the bottom of the main lever, and the bottom lever is hinged to the inside of the hinge block so that the inside of the bottom lever is flush with the inside surface of the main lever.
As a further explanation of the present invention, it is preferable that the tops of the main rod and the slide rod extend out of the can body, and a cover is fixedly connected to the can body outside the extending ends of the main rod and the slide rod to close the can body.
As a further explanation of the present invention, it is preferable that the top of the tank body at one side of the baffle plate away from the rectifying tank is provided with a liquid inlet pipe for injecting material into the tank body, and the tank body below the bottom rod is provided with a slag discharge pipe for withdrawing the solid CBS and the accelerator M out of the tank body.
As a further explanation of the present invention, it is preferable that the tank body is provided with a circulation outlet at a lower portion of the heating pipe, a circulation inlet is provided at a side of a top of the rectifying tank, and the circulation outlet and the circulation inlet are connected to each other by a pipe and a pump body so that the liquid flows in the tank body and the rectifying tank.
As a further explanation of the present invention, it is preferable that the upper part of the rectifying tank is provided with a plurality of trays at intervals, and the trays are provided with air holes and are filled with fillers.
As a further explanation of the present invention, it is preferable that a liquid level meter is inserted at one side of the tank body located at the baffle plate, a thermometer and a pressure meter are arranged at one side of the rectifying tank, and the liquid level meter, the thermometer and the pressure meter are all connected with the controller.
(III) beneficial effects
The technical scheme of the invention has the following advantages:
according to the invention, nitrogen is adopted to pressurize one side of the tank body, so that mother liquor permeates the filter screen to block the solid particle accelerator M and a small amount of CBS powder on one side of the tank body, then distillation is carried out on the other side of the tank body, the evaporation capacity is increased in an up-down circulation mode, and the pressure on the side to be filtered of the tank body is always higher than the pressure on the filtered side in a combined air suction mode, so that the flow of the liquid to a low-pressure area is promoted, and the filtering effect is improved.
Drawings
FIG. 1 is a right side view of the present invention;
FIG. 2 is a left side view of the present invention;
FIG. 3 is an enlarged view of A in FIG. 2;
FIG. 4 is a block diagram of a film applicator of the present invention;
FIG. 5 is an enlarged view of B in FIG. 4;
FIG. 6 is a top view of the present invention;
FIG. 7 is an enlarged view of C in FIG. 6;
FIG. 8 is a view of the installation position of the heating tube of the present invention;
fig. 9 is a working state diagram of the present invention.
In the figure: 1. a tank body; 11. a baffle; 12. a flow hole; 13. a liquid inlet pipe; 14. a circulation outlet; 15. a slag discharge pipe; 16. a liquid level gauge; 17. a cover; 2. a rectifying tank; 21. a tray; 22. a circulation inlet; 23. a steam outlet; 24. a thermometer; 25. a pressure gauge; 3. shi Moqi; 31. a main rod; 32. a slide bar; 33. a bottom bar; 34. a support rod; 35. connecting blocks; 36. a hinge block; 37. a limit groove; 4. and (5) heating the pipe.
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.
The utility model provides a recovery unit of cyclohexylamine in vulcanization accelerator CBS production, as shown in FIG. 1, includes jar body 1, rectifying tank 2, application membrane ware 3 and heating pipe 4, rectifying tank 2 links firmly in jar body 1 one side upper portion, and Shi Mo ware 3 is last to be pasted filter screen or filter membrane, and Shi Mo ware 3 stretches into jar body 1 in order to separate jar body 1 inner chamber, and heating pipe 4 penetrates jar body 1 in rectifying tank 2 below, and heating pipe 4 heats in order to make cyclohexylamine evaporate and get into rectifying tank 2.
Referring to fig. 1 and 2, the tank body 1 is of a horizontal cylinder structure, a baffle 11 is fixedly connected to the middle part in the tank body 1, the baffle 11 is preferably made of a heat insulation material, the baffle 11 is of a disc structure, a plurality of circular flow holes 12 are formed in the lower part of the baffle 11 at intervals, and the flow holes 12 are distributed in a fan-shaped interval. The tank body 1 is located baffle 11 and keeps away from rectifying tank 2 one side top and is equipped with feed liquor pipe 13 in order to pour into the liquid material that contains cyclohexane into to tank body 1, after the liquid is poured into simultaneously, accessible external switching-over valve lets in pressurized nitrogen gas to feed liquor pipe 13 in, can make the tank body 1 pressure on baffle 11 both sides different on the one hand, on the other hand under the heat transfer of tank body 1, avoid liquid bumping.
Referring to fig. 1 and 2, a plurality of trays 21 are arranged at the top in the rectifying tank 2, and air holes are formed in the middle of the trays 21 to enable air to pass upwards, preferably, if the rectifying tank 2 is in a detachable structure, packing can be paved on the trays 21 to absorb moisture in steam or other byproducts in liquid, so that the purity of cyclohexylamine is improved. The different sides of the trays 21, which are adjacently distributed up and down, are provided with flow channels to allow the liquid to flow downwards. The tank body 1 is provided with a circulating outlet 14 at the lower part of the heating pipe 4, one side of the top of the rectifying tank 2 is provided with a circulating inlet 22, and the circulating outlet 14 and the circulating inlet 22 are connected with a pump body through a pipeline to enable liquid to flow in the tank body 1 and the rectifying tank 2. The tank body 1 is arranged below the film applicator 3 and is provided with a slag discharging pipe 15 for pumping the solid CBS and the accelerator M out of the tank body 1. The top of rectifying tank 2 is equipped with steam outlet 23, and steam outlet 23 links to each other with liquefier and aspiration pump, through in drawing the gas that evaporates into the liquefier, makes cyclohexylamine liquefaction in the environment that the liquefier is less than 110 ℃, if set up packing absorption moisture can reduce liquefaction temperature, the energy saving, then stores the cyclohexylamine that liquefies in the temporary storage tank, reaches and imports to cyclohexylamine head tank after a certain amount. In addition, the pressure in the rectifying tank 2 can be lower than the pressure of the tank body 1 at the liquid inlet pipe 13 in the air extraction process, so that materials can continuously flow into the tank body 1 below the rectifying tank 2 under the action of pressure difference.
With reference to fig. 1 and 2, a thermometer 24 and a manometer 25 are arranged on one side of the rectifying tank 2, a liquid level meter 16 is inserted on one side of the baffle 11 in the tank body 1, and the liquid level meter 16, the thermometer 24 and the manometer 25 are all connected with a controller, so that a computer can detect temperature, pressure and liquid level indexes in the device in real time, and can judge whether the running environment in the device is safe or not by calculating and comparing preset values, and if abnormality occurs, the running environment stops in time and is warned, and the safety is ensured.
Referring to fig. 4 and 5, the film applicator 3 includes a main rod 31, a slide rod 32, a bottom rod 33 and a support rod 34, one end of the main rod 31 extends into the tank 1 and is abutted to the baffle 11, the bottom of the main rod 31 is abutted to the bottom of the tank 1, the slide rod 32 is slidably connected to the main rod 31, the length of the slide rod 32 is smaller than that of the main rod 31, a connecting block 35 in a shape like a Chinese character 'men' is arranged at the bottom of the slide rod 32, limit grooves 37 are formed in two sides of the main rod 31, the inner side of the connecting block 35 is embedded into the limit grooves 37 to enable the slide rod 32 to be slidably connected with the main rod 31, one end of the support rod 34 is hinged with the connecting block 35, so that the slide rod 32 can control the support rod 34 to move by moving along the main rod 31, and one end of the bottom rod 33 is hinged with the other end of the support rod 34.
Referring to fig. 6 and 7, an arc-shaped hinge block 36 is fixedly connected to the outer side of the bottom of the main rod 31, one ends of two arc-shaped bottom rods 33 are respectively hinged to the hinge block 36, the bottom rods 33 are hinged to the inner side of the hinge block 36 so that the inner sides of the bottom rods 33 are flush with the inner side surfaces of the main rod 31, a filter screen or a filter membrane is fixed on the flush surface, the mesh number of the filter screen or the filter membrane is equal to or greater than 80 meshes of nylon filter screens, preferably 100 meshes of nylon filter screens, and if flocculation treatment is performed on materials in advance, the mesh number of the selected filter screens can be reduced. Since the particle size of the accelerator M particles used in the production of CBS product is about 1mm, and the particle size of the precipitated CBS powder is substantially greater than 0.17mm (a small amount of mother liquor is evaporated by vacuum filtration using an 80 mesh screen, and the remaining solid material is very small), the screen or filter abuts on the baffle plate 11 and completely covers the flow hole 12. The other end of the bottom rod 33 is hinged with one end of the supporting rod 34. The slide bar 32 moves downwards to prop the bottom bar 33 open by the support bar 34, and the filter screen or the filter membrane is spread to be covered on the baffle 11. The slide bar 32 moves upwards to retract the bottom bar 33 through the support bar 34, and the bottom bar 33 retracts the filter screen or the filter membrane. Referring to fig. 3, the top parts of the main rod 31 and the slide rod 32 extend out of the tank body 1, the tank body 1 is located outside the extending ends of the main rod 31 and the slide rod 32 and fixedly connected with a sealing cover 17 through a flange, and a sealing ring is arranged in the sealing cover 17 to seal the connecting end of the tank body 1 and the film applicator 3.
Referring to fig. 8 and 9, the heating pipe 4 is a U-shaped pipe, and the heating pipe 4 may be a solid pipe which is electrically heated, or a hollow pipe which is electrically heated and is supplied with flowing water vapor, when the lateral length of the tank 1 is shorter, the solid pipe may be used, and when the lateral length of the tank 1 is longer, the hollow pipe is selected, and if the hollow pipe is used, the water vapor temperature is not lower than 150 ℃, and preferably, the hollow pipe is used. When the cyclohexylamine is recovered, the material is firstly introduced into one side of the tank body 1, which is close to Shi Moqi, through the liquid inlet pipe 13, the liquid level height is measured by the liquid level meter 16, the liquid level height is required to reach the flow hole 12 which is at the highest position, and at the moment, part of the liquid flows to the other side of the tank body 1 through the filter screen or the filter membrane. When the liquid level at one side of the liquid inlet pipe 13 is not lowered, the heating pipe 4 is started to heat the material, meanwhile, the circulating outlet 14 is started to pump part of liquid into the circulating inlet 22, steam generated in the tank body 1 flows upwards to exchange heat with the liquid flowing down from the circulating inlet 22, so that part of cyclohexylamine in the liquid is evaporated into gas, and the effects of increasing a heating surface and improving evaporation efficiency are achieved.
After the temperature monitored by the thermometer 24 reaches the threshold value, the reversing valve is started to introduce pressurized nitrogen into the liquid inlet pipe 13, the unfiltered material in the tank body 1 is promoted to flow to the other side of the baffle plate 11, after the liquid level is reduced to the position below the highest flow hole 12, the pressure monitored by the manometer 25 is increased, the nitrogen injection is stopped, and the nitrogen flowing into the other side of the tank body 1 can also play a role in preventing bumping. In addition, since the heat transfer of the tank 1 will evaporate the cyclohexylamine on the unfiltered side of the tank 1, the nitrogen injection amount should be dynamically changed, if the indication of the pressure gauge 25 is continuously reduced, which means that the filter screen or the filter membrane is completely blocked, the nitrogen injection and the heating of the heating pipe 4 should be stopped at this time, so as to avoid accidents caused by the fact that the pressure in the tank 1 on the liquid inlet pipe 13 side is too large to exceed the bearing range of the tank 1.
When the liquid level gauge 16 detects that the liquid level is lower than the height of the highest flow hole 12 and the indication number of the pressure gauge 25 is the same as the pressure of the pressurized nitrogen, the nitrogen injection is stopped, and after the indication number of the pressure gauge 25 is the same as the atmospheric pressure, the reversing valve is started to reverse so as to continuously inject the material into the tank body 1. After the current batch of material is injected, and the liquid level gauge 16 detects that the liquid level is lower than the height of the highest flow hole 12, when the indication number of the pressure gauge 25 is the same as the pressure of the pressurized nitrogen, the filter screen or the filter membrane is not completely blocked at present, then the nitrogen injection is stopped, and when the pressure gauge 25 is lower than the atmospheric pressure and reaches the threshold value, the heating is stopped, so that the recovery is completed. Then the slag discharging pipe 15 is opened to guide the residual liquid into the waste tank, then the sealing cover 17 is opened, the tool fixing main rod 31 is adopted to pull the sliding rod 32, the filter screen or the filter membrane is contracted, and then the membrane applicator 3 is pulled out of the tank body 1 to be replaced and cleaned, so that preparation is made for the next recycling work.
If the liquid level of the liquid level meter 16 is lower than the height of the flow hole 12 at the highest position and higher than the lowest threshold value, the number of the pressure gauge 25 is continuously reduced, which indicates that the filter screen or the filter membrane is completely blocked, at the moment, the air suction and the heating are stopped immediately, the residual temperature of the tank body 1 is utilized to enable the pressure difference at two sides of the baffle plate 11 to be reduced to the lowest, the slag discharging pipe 15 is opened to guide the residual liquid in the tank body 1 into the waste tank, after the pressure in the tank body 1 is reduced to the atmospheric pressure, the sealing cover 17 is opened to replace the filter screen or the filter membrane, and the operation is repeated.
In summary, the baffle 11 and the filter screen membrane which can be conveniently replaced are arranged, the filtration is realized by utilizing the pressure difference, the solid particles are prevented from flowing to the heating pipe 4, the highest heat exchange efficiency between the heating pipe 4 and the materials is ensured, in addition, the flow of the materials is promoted by additionally introducing pressurized nitrogen, the problem that the quantity of gas volatilized by heat conduction of unfiltered materials is small enough to promote the flow of liquid is solved, the anti-bumping effect is also realized, and the purification safety is improved. In addition, the contact surface of liquid and high-temperature gas is increased in a rectifying mode, so that cyclohexylamine volatilizes more quickly, the recovery efficiency of cyclohexylamine is improved by combining the extraction of the steam outlet 23, the pressure difference at two sides of the tank body 1 is increased, the liquid flow filtration is further promoted, and the filtration efficiency is improved, so that multiple purposes are achieved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A recycling device of cyclohexylamine in a vulcanization accelerator CBS production process is characterized in that: the rectifying device comprises a tank body (1), a rectifying tank (2), shi Moqi (3) and a heating pipe (4), wherein a baffle plate (11) is fixedly connected to the middle part in the tank body (1), a plurality of flow holes (12) are formed in the lower part of the baffle plate (11) at intervals, and the pressure in the tank body (1) at two sides of the baffle plate (11) is different; a material containing cyclohexylamine is filled in a space of the tank body (1) at one side of the baffle (11), a filter screen or a filter membrane is stuck on the Shi Moqi (3), the mesh number of the filter screen or the filter membrane is more than or equal to 80 meshes, and Shi Moqi (3) extends into the tank body (1) and is stuck to one side of the baffle (11) close to the material, so that the filter screen or the filter membrane covers the flow hole (12); the rectifying tank (2) is fixedly connected to the upper part of the other side of the baffle plate (11) of the tank body (1), the heating pipe (4) penetrates into the tank body (1) below the rectifying tank (2), and the heating pipe (4) heats to enable cyclohexylamine to evaporate into the rectifying tank (2).
2. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 1, wherein: the flow holes (12) are arranged at the bottom of the baffle plate (11) and are distributed at intervals in a fan shape.
3. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 2, wherein: shi Moqi (3) include mobile jib (31), slide bar (32), sill bar (33) and branch (34), mobile jib (31) one end stretches into in jar body (1) and with baffle (11) butt, mobile jib (31) bottom and jar body (1) bottom butt, slide bar (32) sliding connection is on mobile jib (31), two curved sill bar (33) one end are articulated with mobile jib (31) respectively, sill bar (33) other end is articulated with branch (34) one end, branch (34) other end is articulated with slide bar (32) so that slide bar (32) move downwards and prop up sill bar (33) through branch (34), slide bar (32) upwards move through branch (34) with sill bar (33) shrink, filter screen or filter membrane link firmly in mobile jib (31) and sill bar (33) are close to baffle (11) one side.
4. A recycling apparatus for cyclohexylamine in a process of producing a vulcanization accelerator CBS according to claim 3, wherein: the bottom of the sliding rod (32) is provided with a connecting block (35) in a shape like a Chinese character 'men', two sides of the main rod (31) are provided with limiting grooves (37), the inner sides of the connecting blocks (35) are embedded into the limiting grooves (37) so that the sliding rod (32) is in sliding connection with the main rod (31), and the supporting rods (34) are hinged with the connecting blocks (35).
5. A recycling apparatus for cyclohexylamine in CBS production process of vulcanization accelerators according to claim 4, wherein: the outer side of the bottom of the main rod (31) is fixedly connected with an arc-shaped hinging block (36), and the bottom rod (33) is hinged to the inner side of the hinging block (36) so that the inner side of the bottom rod (33) is flush with the inner side surface of the main rod (31).
6. A recycling apparatus for cyclohexylamine in CBS production process of vulcanization accelerators according to claim 5, wherein: the tops of the main rod (31) and the sliding rod (32) extend out of the tank body (1), and the tank body (1) is positioned outside the extending ends of the main rod (31) and the sliding rod (32) and fixedly connected with a sealing cover (17) so as to seal the tank body (1).
7. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 6, wherein: the tank body (1) is located baffle (11) and keeps away from rectifying tank (2) one side top and is equipped with feed liquor pipe (13) in order to pour into the material into to tank body (1), and tank body (1) is located bottom rod (33) below and is equipped with scum pipe (15) in order to take out outside tank body (1) with CBS and the promoter M of solid.
8. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 1, wherein: the tank body (1) is provided with a circulating outlet (14) at the lower part of the heating pipe (4), one side of the top of the rectifying tank (2) is provided with a circulating inlet (22), and the circulating outlet (14) and the circulating inlet (22) are connected with a pump body through pipelines so that liquid flows in the tank body (1) and the rectifying tank (2).
9. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 8, wherein: the upper part of the rectifying tank (2) is provided with a plurality of column plates (21) at intervals, and the column plates (21) are provided with air holes and filled with fillers.
10. The recycling apparatus of cyclohexylamine in the production process of vulcanization accelerator CBS according to claim 9, wherein: the tank body (1) is located one side of the baffle (11) and is inserted with a liquid level meter (16), one side of the rectifying tank (2) is provided with a thermometer (24) and a pressure meter (25), and the liquid level meter (16), the thermometer (24) and the pressure meter (25) are all connected with the controller.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN213253063U (en) * | 2020-07-26 | 2021-05-25 | 天津迪斯特节能装备科技有限公司 | Toluene is reflux tank for rectification |
| US20230339785A1 (en) * | 2020-09-17 | 2023-10-26 | East China University Of Science And Technology | Deep purification device and method for methanol-to-olefin washing water |
| CN117185473A (en) * | 2023-10-18 | 2023-12-08 | 宁夏中汇化工有限公司 | A mixed decomposition pond of methyl alcohol raffinate for methyl alcohol rectifying column |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213253063U (en) * | 2020-07-26 | 2021-05-25 | 天津迪斯特节能装备科技有限公司 | Toluene is reflux tank for rectification |
| US20230339785A1 (en) * | 2020-09-17 | 2023-10-26 | East China University Of Science And Technology | Deep purification device and method for methanol-to-olefin washing water |
| CN117185473A (en) * | 2023-10-18 | 2023-12-08 | 宁夏中汇化工有限公司 | A mixed decomposition pond of methyl alcohol raffinate for methyl alcohol rectifying column |
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