CN115093371A - Caprolactam flaking production process method - Google Patents
Caprolactam flaking production process method Download PDFInfo
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- CN115093371A CN115093371A CN202210905081.4A CN202210905081A CN115093371A CN 115093371 A CN115093371 A CN 115093371A CN 202210905081 A CN202210905081 A CN 202210905081A CN 115093371 A CN115093371 A CN 115093371A
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- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 claims abstract description 55
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000007787 solid Substances 0.000 claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 23
- 239000002826 coolant Substances 0.000 claims abstract description 20
- 238000005303 weighing Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 238000007790 scraping Methods 0.000 claims abstract description 8
- 238000007493 shaping process Methods 0.000 claims abstract description 8
- 238000011049 filling Methods 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 40
- 238000003860 storage Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000004744 fabric Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 13
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 5
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- 230000008014 freezing Effects 0.000 abstract description 3
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- 239000011344 liquid material Substances 0.000 description 11
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
- C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
- C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D223/08—Oxygen atoms
- C07D223/10—Oxygen atoms attached in position 2
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
- C07D201/16—Separation or purification
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Abstract
The invention discloses a caprolactam flaking production process method. Which comprises the following steps: conveying liquid caprolactam into a cavity between a shell of a rotary drum flaker and a rotary drum, introducing a cooling medium into the rotary drum, cooling the material attached to the outer surface of the rotary drum to a freezing point and solidifying the material when the rotary drum rotates, and scraping the solid caprolactam on the surface of the rotary drum in a flaky manner by a scraper when the rotary drum rotates to the scraper position of the rotary drum flaker; weighing caprolactam slices scraped by a scraper and filling the caprolactam slices into a packaging bag; the packaging bags with the knots are conveyed on a conveyor belt, and are sequentially sealed by a heat sealing machine, inverted by a bag inverting mechanism, re-checked by a weight re-checking machine, rejected by an automatic rejecting machine, leveled and shaped by an automatic leveling and shaping machine and conveyed by a powerless conveyor. The method of the invention has the advantages of even flaking and low energy consumption.
Description
Technical Field
The invention relates to a caprolactam flaking production process method, belonging to the technical field of caprolactam flaking.
Background
Caprolactam is an important organic chemical raw material and is mainly used as a monomer raw material for industrial spinning, plastic modification, palm fiber, fishing net fiber, conveyor belt cores, injection molding, food packaging films and the like. Caprolactam raw materials are generally liquid and need special vehicles for transportation, so that the transportation cost is high and potential transportation safety hazards exist. In order to avoid the problems of storage and transportation of a large amount of liquid caprolactam, the liquid caprolactam is quickly cooled and converted into solid tablets, and the low-cost common works which are convenient and easy to obtain enable the low-cost production of the tablets.
At present, the conventional caprolactam flaking technology in China generally adopts a rotary drum flaker which is imported and produced in China, and the current caprolactam flaking production has a plurality of defects: some flaker adopts the upper portion to feed the way, the liquid feed liquid is sprinkled on the surface of the tumbler, utilize the cooling jacket set in tumbler to cool the tumbler, this kind of production technology appears the inhomogeneous situation of flaking of supplies easily, require high to the cooling temperature, the refrigerated water consumes greatly; and the scraper that current rotary drum flaker adopted is mostly for straight structure, and the scraper blade is parallel with the rotary drum surface, when striking off solid-state knot piece, and the scraper need bear great load, and scraper system fault rate is high, and cost of maintenance is high, and this kind of scraper structure also has high to the power requirement of rotary drum motor, and whole system energy consumption is high, and scraper clearance adjustment difficulty moreover requires the precision height, causes the transmission unstably easily.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a caprolactam flaking production process method with uniform flaking and low energy consumption.
The invention is realized by the following technical scheme: a caprolactam flaking production process method is characterized in that: the method comprises the following steps:
(1) liquid caprolactam is conveyed into a cavity between a shell and a rotary drum of a rotary drum flaker from a storage tank through a conveying pump, the lower part of the rotary drum flaker is contacted with the liquid caprolactam in the cavity, a cooling medium is filled in the rotary drum of the rotary drum flaker, the liquid caprolactam is attached to the surface of the rotary drum when the rotary drum of the rotary drum flaker rotates, the material attached to the outer surface of the rotary drum is cooled to a solidifying point and solidified through the temperature difference between the material on the outer surface of the rotary drum and the cooling medium in the rotary drum, and when the rotary drum continues to rotate to the position of a scraper of the rotary drum flaker, the solid caprolactam on the surface of the rotary drum is scraped in a sheet form through the scraper;
(2) feeding the caprolactam slices scraped by the scraper into a double-helix automatic weighing and packaging machine for weighing, and filling the weighed slices into a packaging bag;
(3) conveying the packaging bag with the knot sheets on a conveying belt, and sealing the packaging bag by a heat sealing machine;
(4) the sealed packaging bags are continuously conveyed forwards through the conveying belt and sequentially pass through a bag pouring mechanism, a weight rechecking machine, an automatic rejecting machine, an automatic vibration leveling shaping machine and an unpowered conveying machine, wherein the bag pouring mechanism converts the packaging bags from a vertical state to a horizontal state, the weight rechecking machine rechecks the weight of the packaging bags, the automatic rejecting machine rejects the unqualified packaging bags out of the conveying belt, and the automatic vibration leveling shaping machine shakes and shapes the qualified packaging bags.
In the invention, a caprolactam liquid material enters a cavity between a rotary drum and a shell, the lower part of the rotary drum of a rotary drum flaker is contacted with the liquid caprolactam in the cavity, and a cooling medium is introduced into the rotary drum. When the rotary drum rotates under the action of power, the material is taken up from the liquid material pool along with the uniform rotation of the surface of the rotary drum by utilizing the tension of the surface of the material liquid and the adhesive force between the material and the surface of the rotary drum, a layer of film product with uniform thickness is formed on the outer surface of the rotary drum, and the temperature of the material is rapidly cooled to a solidifying point and solidified through the temperature difference between the material on the outer surface of the rotary drum and a cooling medium in the rotary drum. When the rotary drum rotates to the position of the scraper, the film product solidified into solid is scraped in a sheet form by the scraper, the scraped sheet product is sent into a double-helix automatic weighing packaging machine for weighing, and the weighed sheet is filled into a packaging bag; the wrapping bag seals through the heat-sealing machine, and then when the wrapping bag was carried on the conveyer belt, trun into the state of keeping flat with the wrapping bag by vertical state through the mechanism of falling the bag, recheck the wrapping bag weight through the weight rechecking machine, reject out the conveyer belt with unqualified wrapping bag through automatic elimination machine, shake flat plastic to qualified wrapping bag through automatic shaping machine that shakes. The packing bags are manually stacked at the tail end of the conveying belt. According to the flaking method of the rotary drum flaker, thin film products with uniform thickness can be formed on the surface of the rotary drum, a reliable temperature difference can be formed between materials on the outer surface of the rotary drum and a cooling medium in the rotary drum by introducing chilled water into the rotary drum, the chilled water consumption is low, products with uniform granularity can be formed, the thin film products formed on the surface of the rotary drum are uniform in thickness, the stress is uniform when a scraper scrapes the thin film products, and the fault of a scraper system can be reduced.
Further, in order to facilitate material crystallization, a hot water system is adopted for heat tracing when the liquid caprolactam is conveyed into the drum sheeting machine from the storage tank, wherein the temperature of the hot water is 90 ℃, and the temperature of the liquid caprolactam is 80-85 ℃.
Further, the cooling medium is chilled water or the cooling medium is cold air; in the step 1, dry air is introduced into a cavity between a shell of the rotary drum flaker and the rotary drum. When chilled water is used as a cooling medium, the chilled water is introduced into an inner cavity of the rotary drum flaker to cool the rotary drum. When the cooling medium is cold air, the cold air at ultralow temperature can make the liquid caprolactam instantaneously crystallize. Dry air is introduced into the cavity, so that the caking can be prevented, and the discharge and subsequent treatment of solid caking are facilitated.
Furthermore, a scraper of the drum flaker is spiral and is consistent with the curved surface of the drum, the enveloping degree of the scraper to the drum is 150-180 degrees, the lower end of the scraper is positioned at one side of a discharge port of the drum flaker, the scraper is a single-side cutting edge, the cutting edge is higher than the inner surface of the scraper, and the inner surface of the scraper is made of ceramic composite materials. The scraper adopts helical structure, and this kind of design can make the scraper when striking off the film product on rotary drum surface, the not simultaneous operation of whole blade face of scraper, and the scraper blade face strikes off with the film product contact on rotary drum surface in order, strikes off in-process scraper atress little, and the transmission is steady, can reduce the scraper fault rate, and this kind of structural design can reduce the energy consumption simultaneously, can reduce the power requirement to the rotary drum motor, reaches energy-conserving and reduce wear's effect. The scraper adopts a design that the cutting edge of one side is higher than the inner surface of the scraper, so that initial solid sheets can not stick to the scraper and can naturally slide down; the inner surface of the scraper is made of ceramic composite material, the inner surface of the cutter has high smoothness, and the solid initial piece can be ensured to smoothly slide to the lowest part under the action of self gravity.
Further, the scraper scrapes off the solid caprolactam on the surface of the rotary drum by contacting with the film products on the surface of the rotary drum from the upper end to the lower end in sequence. When the scraper blade face is in contact with the film product on the surface of the rotary drum to scrape from the upper end to the lower end in sequence, the scraper is stressed little in the scraping process, the transmission is stable, the fault rate of the scraper can be reduced, the power requirement on the rotary drum motor can be reduced, and the effects of saving energy and reducing abrasion are achieved.
Furthermore, in order to facilitate the packaging machine to obtain products with qualified granularity, caprolactam flakes scraped by a scraper are firstly sent into a bin arranged at the upper part of the double-helix automatic weighing packaging machine to be crushed and filtered, and caprolactam powder with qualified granularity is then sent into the double-helix automatic weighing packaging machine to be weighed.
Furthermore, a crushing device and a screen are arranged in the bin, the screen is arranged at the lower part of the crushing device, the crushing device comprises a roller cutter driven by a motor to rotate, at least one spiral blade is arranged on a cutter bar of the roller cutter at intervals along the axial direction of the roller cutter, each spiral blade is provided with two spiral blades arranged at an included angle of 180 degrees, the rotating directions of the two blades are consistent, the heights of the two blades are different, and the blades have downward or upward bent radians. The uneven slice product of size that can scrape the scraper through reducing mechanism's roller sword is smashed into the powder of suitable granularity, can sieve out the powder product of qualified granularity through the screen cloth, then weighs again. The structural design of the helical blade of the roller cutter can ensure that the roller cutter is rotated, the caprolactam solid-state knot pieces are fully crushed through the helical blade, two blades which are not at the same height can not only crush the solid-state knot pieces which are at the same height, but also fall down along with the qualified knot piece powder of the granularity of the filter screen part, the roller cutter can crush the knot pieces which are at the upper part for a plurality of times, the bent blades can enable the solid-state knot pieces to form turbulent flow in the rotating process, and the crushing effect and the crushing efficiency of the solid-state knot pieces can be increased.
Furthermore, caprolactam flakes scraped by a scraper directly fall into a storage bin to be crushed. The initial solid-state knot pieces scraped by the scraper can directly enter the storage bin to be crushed under the action of the spiral scraper, a feeding mechanism for conveying the scraped knot pieces into the storage bin is not required to be arranged, the feeding step is omitted, equipment configuration can be saved, and meanwhile, the energy-saving effect can be realized.
Further, the screen cloth rotationally sets up in the feed bin, and the screen cloth is omega shape, the direction of rotation of screen cloth with the direction of rotation of roller sword is opposite, when the roller sword rotated, the screen cloth is counter-rotating simultaneously. When the direction of rotation of screen cloth and roller sword was opposite, the initial knot piece of solid naturally formed the heliciform and flows in the screen cloth, and the initial knot piece of solid that the size is different can easily be smashed to the blade of roller sword this moment, and the qualified knot piece powder of granularity is under the effect of centrifugal force, and entering feed bin that can be quick waits for next calculation bagging-off operation.
Furthermore, a cleaning mechanism is arranged on the scraper and comprises a cleaning motor, a gear and a scraper blade, the gear and the scraper blade are driven by the cleaning motor, a rack and a limiting guide plate are arranged at the outer side end of the scraper blade, a guide groove is formed in the limiting guide plate, one end of a motor shaft of the cleaning motor is movably arranged in the guide groove of the limiting guide plate, the gear is connected with a rotor of the cleaning motor into a whole, the gear is meshed with the rack, the other end of the cleaning motor is supported in a bearing shell through a bearing, an auxiliary support rod is arranged at the lower part of the bearing shell, one end of a scraper blade connecting rod is fixedly connected with the end face of the bearing shell, the other end of the scraper blade connecting rod is connected with the scraper blade through an electric cylinder, and the scraper blade can be in contact with the inner surface of the scraper blade; when the cleaning motor rotates forwards, the electric cylinder extends to enable the scraper to move to the lower end to be in contact with the scraper to clean the surface of the scraper, when the cleaning motor rotates backwards, the electric cylinder is shortened, the scraper moves upwards to be separated from the surface of the scraper, and cleaning is not performed.
The invention has the beneficial effects that: the lower part of the rotary drum is immersed into the liquid material to rotate so as to drive the material to be attached to the surface of the rotary drum, and the liquid material is crystallized and solidified by introducing a cooling medium into the inner cavity of the rotary drum, so that the requirement on cooling temperature is low, and the energy consumption can be greatly reduced; according to the rotary drum flaker, the flaker mode can form a film product with uniform thickness on the surface of the rotary drum, the stress is uniform when the scraper scrapes, and the system faults of the scraper can be reduced; according to the scraper structure adopted by the invention, when the film product on the surface of the rotary drum is scraped, the whole blade surface of the scraper does not work simultaneously, the blade surface of the scraper is in contact with the film product on the surface of the rotary drum from the upper end to the lower end for scraping, the stress of the scraper is small in the scraping process, the transmission is stable, the failure rate of the scraper can be reduced, and the energy consumption can be reduced; the invention adopts convenient and easily-obtained low-cost public works, so that the production cost can be greatly reduced.
Drawings
FIG. 1 is a flow chart of the production process of the present invention;
FIG. 2 is a schematic view of a production apparatus of a caprolactam sheeting line;
FIG. 3 is a schematic view of a drum sheeter according to the present invention;
FIG. 4 is a schematic diagram of a doctor blade arrangement of a rotary drum flaker in accordance with the present invention;
FIG. 5 is a schematic cross-sectional view of a doctor blade of the present invention;
FIG. 6 is a front view of the roller blade of the present invention (with a helical blade);
FIG. 7 is a perspective view of a roller blade according to the present invention (with two helical blades);
FIG. 8 is a schematic view of FIG. 1 taken along line A;
FIG. 9 is a schematic view of a second arrangement of doctor blades and bins of a rotary drum flaker assembly according to the invention;
FIG. 10 is a schematic illustration of a second screen of the present invention;
FIG. 11 is a schematic view of the present invention with a sweeping mechanism;
FIG. 12 is a schematic drive diagram of the sweeping mechanism of FIG. 11;
FIG. 13 is a schematic view of the connection of the sweeping mechanism and the scraper blade of FIG. 11;
in the figure, 1, a rotary drum flaker, 2, a feeding screw, 3, a double-screw automatic weighing and packaging machine, 4, an automatic heat sealing machine, 5, a main belt conveyor, 6, an automatic bag pouring conveyor, 7, a slope conveyor, 8, a weight rechecking machine, 9, an automatic rejecting machine, 10, an automatic vibrating and leveling conveyor, 11, an unpowered conveyor, 12, a refrigerator, 13, a raw material storage tank, 14, a storage bin, 15, a roller knife, 16, a screen, 17, a motor of a crushing device, 18, a motor of the screen, 19, a dust remover, 20 and a water pump;
1-1 parts of a shell, 1-2 parts of a rotary drum, 1-3 parts of a scraper, 1-4 parts of a rotary drum driving motor, 1-5 parts of a rack, 1-6 parts of a limiting guide plate; 21. the cleaning device comprises a cleaning mechanism 21-1, a cleaning motor 21-2, a gear 21-3, a scraper 21-4, an electric cylinder 21-5, an electric cylinder controller ECU 21-6, a motor TCU 21-7, a bearing 21-8, a bearing shell 21-9, a scraper connecting rod 21-10 and an auxiliary supporting rod; 15-1, spiral blade.
Detailed Description
The invention will now be further illustrated by way of non-limiting examples in conjunction with the accompanying drawings:
the production process of caprolactam flaking with the technological flow as shown in figure 1 includes mainly the following steps: the method comprises the steps of a caprolactam storage tank, a sheet forming machine, a double-helix automatic weighing and packaging machine, an automatic heat sealing machine, a main belt conveyor, an automatic bag pouring conveyor, a slope conveyor, a weight re-inspection machine, an automatic removing machine, an automatic vibration flattening conveyor, an unpowered conveyor and manual stacking.
As shown in the attached figure 2, is a schematic diagram of production equipment of a caprolactam flaking production line. The production line equipment mainly comprises: the automatic bag-falling machine comprises a rotary drum flaker 1, a double-helix automatic weighing and packaging machine 3, an automatic heat sealing machine 4, a main belt conveyor 5, an automatic bag-falling conveyor 6, a slope conveyor 7, a weight rechecking machine 8, an automatic rejecting machine 9, an automatic vibration leveling conveyor 10, an unpowered conveyor 11, a dust removal system and public engineering. The utility project mainly comprises a chilled water system, a steam system, a dry air system and the like. Cooling and sheeting the liquid caprolactam into solid caprolactam, bagging and packaging (25 KG/bag), stacking and winding the film.
As shown in fig. 3 to 5, the structure of the drum flaker 1 is schematically illustrated. A rotary drum flaker 1 is used to convert liquid caprolactam into solid caprolactam. The drum flaker 1 comprises a shell 1-1, a drum 1-2 rotatably arranged in the shell 1-1, and a scraper 1-3 arranged in the shell 1-1 corresponding to the outer surface of the drum 1-2. The shell 1-1 is provided with a feeding hole and a discharging hole, and feeding is controlled by a feeding control valve. The rotary drum 1-2 is provided with an inner cavity, a cavity is arranged between the rotary drum 1-2 and the shell 1-1, a space between the lower part of the rotary drum 1-2 and the shell 1-1 is a liquid material pool for containing caprolactam liquid materials, and the liquid level of the materials is controlled by a radar level gauge. The rotary drum 1-2 is driven to rotate by a rotary drum driving motor 1-4, and the rotary drum 1-2 is controlled to rotate by a PLC and a frequency converter. And a cooling medium is introduced into the inner cavity of the rotary drum 1-2 to form a temperature difference between the inside and the outside of the rotary drum, so that the temperature of the material outside the rotary drum is rapidly cooled to a solidifying point and solidified. In the embodiment, chilled water is introduced into the inner cavity of the rotary drum 1-2, the inner cavity of the rotary drum 1-2 is provided with a nozzle which is connected with a chilled water system, the inner cavity of the rotary drum 1-2 is provided with a liquid level sensor for detecting the water level of the chilled water, and the starting of a water pump 20 of the chilled water system is controlled through a liquid level signal. The scraper 1-3 is spiral and is consistent with the curved surface of the rotary drum 1-2, the scraper 1-3 is fixedly connected with the sheeting apparatus shell, the lower end of the scraper 1-3 is positioned at one side of the discharge hole of the shell 1-1, a certain gap is arranged between the scraper 1-3 and the surface of the rotary drum 1-2, and the enveloping degree of the scraper 1-3 to the rotary drum 1-2 is 150 plus 180 degrees, the design can ensure that the whole blade surface of the scraper 1-3 does not work simultaneously when the scraper 1-3 scrapes the film product on the surface of the rotary drum 1-2, the blade surface of the scraper 1-3 is contacted with the film product on the surface of the rotary drum 1-2 from the upper end to the lower end for scraping, the scraper has small stress in the scraping process, the transmission is stable, the fault rate of the scraper can be reduced, meanwhile, the power requirement on a rotary drum driving motor can be reduced, the equipment configuration can be reduced, and the energy-saving effect is achieved. Preferably, the gap between the scraper 1-3 and the surface of the rotary drum 1-2 can be adjusted, and the adjustment of the scraper gap can be realized by adopting a strip-shaped hole as a mounting hole on a bracket for mounting the scraper 1-3. The scraper 1-3 adopts a single-side cutting edge, the cutting edge adopts a hard alloy cutter, and a diamond-like coating is deposited on the surface, so that the scraper has stronger abrasion resistance and longer service life; the cutting edge of the scraper 1-3 is higher than the inner surface of the scraper, so that initial solid sheets can not stick to the scraper and can naturally slide down conveniently; the inner surface of the scraper is made of ceramic composite materials, the surface smoothness is high, and the initial solid sheet can conveniently slide to the lowest part under the action of self gravity. Ceramic composites are prior art. The outer side of the lower part of the shell 1-1 is provided with a heating system, the heating system adopts steam for heating, the temperature of the liquid caprolactam is kept between 80 and 85 ℃ through the heating system, the liquid caprolactam is conveniently crystallized by utilizing temperature difference, and the crystallization temperature is about 69 ℃. The cavity between the rotary drum 1-2 and the shell 1-1 of the rotary drum flaker 1 is filled with dry air for preventing the flaked sheets from being stuck together. And the air outlet end of the dried tail gas is connected with a dust remover 19 for removing dust from the dried tail gas, and the tail gas after dust removal enters an exhaust system for exhaust.
In the invention, the cooling medium introduced into the inner cavity of the rotary drum can also adopt cold air, such as: the freezing principle of Freon air conditioner is adopted, and cold air at ultralow temperature is introduced to make liquid caprolactam instantaneously crystallize.
When the rotary drum flaker works, a caprolactam liquid material enters a liquid material pool between a rotary drum 1-2 and a shell 1-1 through a feed inlet on the shell 1-1 of the rotary drum flaker 1, the lower part of the rotary drum 1-2 of the rotary drum flaker 1 is immersed in the liquid material pool containing the liquid material, and a cooling medium is introduced into the rotary drum 1-2 of the rotary drum flaker 1. The rotary drum 1-2 rotates under the action of the rotary drum driving motor 1-4, the material is taken up from the liquid material pool along with the uniform rotation of the surface of the rotary drum by utilizing the tension of the surface of the material liquid and the adhesive force between the material and the surface of the rotary drum, a layer of film product with uniform thickness is formed on the outer surface of the rotary drum, and the temperature of the material is rapidly cooled to a freezing point and solidified through the temperature difference between the material on the outer surface of the rotary drum and a cooling medium in the rotary drum. When the rotary drum 1-2 is rotated to the position of the scraper 1-3, the thin film product solidified into solid is scraped off in a sheet form by the scraper 1-3. When the rotary drum flaker works, dry air is introduced into the rotary drum flaker to dry flakers, the dried tail gas is dedusted by the deduster 6, and the dedusted tail gas enters the exhaust system to be exhausted.
As shown in fig. 3 and fig. 6 to 8, in the present embodiment, a bin 14 is provided below the discharge port of the casing 1-1, and a crushing device for crushing solid flakes and a screen 16 for filtering flake powder are provided in the bin 14. The crushing device comprises a motor 17 and a roller cutter 15, wherein the motor 17 is fixed on the upper part of a shell 1-1 of the flaker, the screen 4 is fixedly arranged in the bin 14 and is positioned on the lower part of the roller cutter 15, the upper part of a cutter bar of the roller cutter 15 is connected with an output shaft of the motor 17, and the lower part of the cutter bar of the roller cutter 15 is rotatably connected with the central point of the screen 16. The roller cutter 15 comprises at least one layer of spiral blades 15-1 arranged at intervals along the axial direction of a cutter bar of the roller cutter, each spiral blade 15-1 is provided with two spiral blades arranged at an included angle of 180 degrees, and the rotating directions of the two blades are consistent. The two blades of the spiral blade 15-1 can be horizontally arranged blades, in order to improve the crushing effect of the crushing device, the spiral blade 15-1 is preferably arranged obliquely in the embodiment, the inclination angle is 15-30 degrees, the two blades of the spiral blade 15-1 are different in height, i.e., one blade is at a higher elevation than the other, and both blades have a downward or upward curved curvature, the structural design can lead the fragments to form turbulent flow in the rotating process of the roller cutter, is convenient for the spiral blade to fully crush the fragments, meanwhile, two blades of the spiral blade which is obliquely arranged are respectively positioned at different heights, so that the knot pieces positioned at different positions can be conveniently crushed, and the roller cutter can break the upper flake for multiple times along with the falling of flake powder with qualified granularity at the filter screen part. The spiral blade 15-1 arranged on the roller knife 15 can be multi-layer, and preferably, the roller knife 15 comprises an upper layer and a lower layer of the spiral blade 15-1. The roller cutter 15 arranged in the bin 14 can crush initial solid fragments with uneven sizes entering the bin 14, the structural design of the roller cutter 15 can crush the solid fragments for multiple times, and the fragment powder with qualified particle sizes falls down through the filter screen 16.
The bin 14 in this embodiment is arranged below the discharge port of the flaker, and this arrangement needs to be provided with a feeding mechanism, for example, the feeding screw 2 is arranged in this embodiment, and the solid flaker scraped by the scraper is fed into the bin 14 through the feeding screw 2.
As shown in fig. 9-10, the bin 14 can also be arranged inside the discharge opening of the casing 1-1 of the rotary drum flaker 1, i.e. it is moved upward relative to the position of the bin 14 in the previous embodiment, the lower end of the scraper 1-3 extends above the bin 14, the screen 16 is rotatably arranged in the bin 14 and below the roller blade 15, the screen 16 is in the shape of omega, and the lower part of the screen 16 is provided with the motor 18 connected with it. The motor 18 is mounted on a bracket which is fixedly connected with the inner wall of the storage bin 14. The screen 16 is rotated by a motor 18. The rotation direction of the screen 16 may be the same as the rotation direction of the roller blade 15 or the rotation direction of the screen 16 may be opposite to the rotation direction of the roller blade 15. The arrangement mode of the storage bin 14 in the embodiment is convenient for solid-state fragments scraped by the scraper to directly fall into the storage bin for crushing treatment, so that a feeding mechanism can be omitted, and equipment configuration is reduced. When the rotating direction of the screen 16 is the same as that of the roller knife 15, initial solid fragments with uneven sizes scraped by the scraper enter the screen 16 in the storage bin, the solid fragments are crushed by the rotation of the roller knife 15, and fragment powder with qualified particle sizes can rapidly enter the lower part of the storage bin under the action of centrifugal force to wait for the next calculation bagging operation; when the rotation direction of the screen 16 is opposite to that of the roller knife 15, the initial solid crusting can naturally form spiral flow, at the moment, the spiral blade is horizontally arranged, so that the initial large and small crusting of the solid can be easily smashed, and the crusting powder with qualified granularity can rapidly enter the storage bin under the action of centrifugal force to wait for the next calculation bagging operation.
As shown in fig. 11 to 13, a cleaning mechanism 21 may be provided on the blade in order to facilitate cleaning of the blade. The cleaning mechanism 21 comprises a cleaning motor 21-1, a gear 21-2 and a scraper 21-3, wherein the cleaning motor 21-1 is an outer rotor motor, and the gear 21-2 is connected with a rotor of the cleaning motor 21-1 into a whole. The outer side end of the scraper 1-3 is provided with a rack 1-5 and a limiting guide plate 1-6, the rack 1-5 is arranged along the inner surface of the scraper 1-3, the limiting guide plate 1-6 is vertically arranged at the outer side end of the scraper 1-3, the limiting guide plate 1-6 is provided with a guide groove, one end of a motor shaft of the cleaning motor 21-1 is movably arranged in the guide groove of the limiting guide plate 1-6, the motor shaft is provided with a boss for limiting and guiding, and the end part of the limiting guide plate 1-6 is provided with a detachable end plate, so that the motor shaft can be conveniently installed in the guide groove. The gear 21-2 is meshed with the rack 1-5, a rotor shaft or a gear shaft end at the other end of the cleaning motor 21-1 is supported in a bearing shell 21-8 through a bearing, an auxiliary supporting rod 21-10 is fixedly connected to the lower portion of the bearing shell 21-8, polyurethane or other elastic materials are connected to the lower portion of the auxiliary supporting rod 21-10, and the auxiliary supporting rod 21-10 is used for enabling the outer diameter of the bearing to be relatively fixed. One end of the scraper connecting rod 21-9 is fixedly connected with the end face of the bearing shell 21-8, the other end of the scraper connecting rod 21-9 is connected with the electric cylinder 21-4, the other end of the electric cylinder 21-4 is connected with the scraper 21-3, and the scraper 21-3 can be in contact with the inner surface of the scraper 1-3. When the cleaning mechanism works, under the driving of the cleaning motor 21-1, the gear 21-2 is meshed with the rack 1-5 to drive the scraper 21-3 to move along the scraper, and the scraper 21-3 cleans the surface of the scraper in the moving process. The cleaning motor 21-1 is controlled by a motor TCU, and the electric cylinder 21-4 is controlled by an electric cylinder controller ECU. The electric cylinder controller ECU is communicated with a motor TCU, when the cleaning motor 21-1 rotates forwards, the electric cylinder 21-4 extends to enable the scraper 21-3 to move to the lower end to be in contact with the scraper 1-3 to clean the surface of the scraper, when the cleaning motor 21-1 rotates backwards, the electric cylinder controller obtains a signal, the electric cylinder 21-4 is shortened, the scraper 21-3 moves upwards to be separated from the surface of the scraper 1-3, and cleaning is not carried out. When the cleaning mechanism is not used for cleaning, the cleaning mechanism is in standby at the highest point. In order to prevent the cleaning mechanism from offside, a limiting structure can be arranged on the scraper to limit the cleaning mechanism.
The double-helix automatic weighing and packaging machine 3 is used for quantitatively weighing and packaging solid caprolactam. It is prior art and is commercially available.
The main belt conveyor 5 is used for conveying the packing bags, which is prior art.
The automatic heat sealing machine 4 is used for sealing the bag mouth of the packaging bag. The automatic heat sealing machine in the embodiment is purchased from Heizhou Heizheng Seiki engineering Automation equipment Limited. The packaging bags are packaged at the opening of the bag by an automatic heat sealing machine 4 in the conveying process of the main belt conveyor 5.
The automatic bag pouring conveyor 6 is used for transferring the packaging bags from the vertical state to the flat state in the packaging bag conveying process. Automatic bag conveyor 6 includes band conveyer and sets up the bag mechanism of falling on band conveyer, and the wrapping bag is transferred into the state of keeping flat through the bag mechanism of falling in band conveyer last transportation process with the wrapping bag from vertical state. The automatic bag-pouring conveyor 6 in this embodiment is purchased from metropolis precision automatic equipment ltd.
The slope conveyor 7 is a belt conveyor and is used for conveying the packaging bags conveyed by the automatic bag-reversing conveyor to the weight rechecking machine 8 for weight rechecking.
The weight rechecker 8 is used to recheck the weight of the package, which is prior art and available from the market. The weight review machine in this example was purchased from Heizhou Heizheng Seiki Automation Equipment, Inc.
The automatic rejecting machine 9 is used for rejecting unqualified packaging bags out of the conveying belt. The automatic removing machine 9 mainly comprises a roller way and a removing mechanism, can automatically remove the packaging bags with over-weight, is the prior art, and can be purchased and obtained from the market. The automatic culling machine 9 in this embodiment is purchased from Hezhou city Hezhou Seiki engineering automation Equipment, Inc.
The automatic vibrating and leveling conveyor 10 is used for vibrating and leveling qualified packaging bags, and is beneficial to subsequent stacking. The automated vibratory leveling conveyor 10 includes a belt conveying section and a vibratory section, and levels the packages primarily by means of bag rollers and a vibratory conveyor. The automatic vibration leveling type conveyor in the embodiment is purchased from Heizhou Heizheng Seiki automatic equipments, Inc.
The unpowered conveyor 11 is mainly used for conveying packaging bags to be stacked, and adopts a roller way structure, and rollers are free rollers.
The caprolactam flaking production process method comprises the following steps:
(1) liquid caprolactam is conveyed into a cavity between a shell 1-1 and a rotary drum 1-2 of a rotary drum flaker 1 from a storage tank 13 through a conveying pump, the lower part of the rotary drum 1-2 of the rotary drum flaker 1 is contacted with the liquid caprolactam in the cavity, a cooling medium is introduced into the interior of the rotary drum 1-2 of the rotary drum flaker 1, the liquid caprolactam is attached to the surface of the rotary drum 1-2 when the rotary drum 1-2 of the rotary drum flaker 1 rotates, the materials attached to the outer surface of the rotary drum 1-2 are cooled to a solidifying point and solidified through the temperature difference between the materials on the outer surface of the rotary drum 1-2 and the cooling medium in the rotary drum 1-2, when the rotary drum 1-2 continuously rotates to the position of a scraper 1-3 of the rotary drum flaker 1, scraping the solid caprolactam on the surface of the rotary drum 1-2 in a flaky form by a scraper 1-3; when the liquid caprolactam is conveyed into the rotary drum flaker 1 from the storage tank 13, a hot water system is adopted for heat tracing, the temperature of the hot water is 90 ℃, and the temperature of the liquid caprolactam is 80-85 ℃; drying air is introduced into a cavity between a shell 1-1 and a rotary drum 1-2 of the rotary drum flaker 1 to prevent flakiness from being bonded together;
(2) caprolactam crusts scraped by the scrapers 1-3 are sent into a storage bin 14 through a feeding screw 2 to be crushed and filtered, caprolactam powder with qualified granularity is weighed through a double-helix automatic weighing packaging machine 3, and the weighed crusts are filled into a packaging bag;
(3) the packaging bags with the knots are conveyed to a main belt conveyor 5 through a conveying belt for conveying, and the packaging bags are sealed through an automatic heat sealing machine 4 in the conveying process;
(4) the sealed packaging bags are continuously conveyed forwards to an automatic bag pouring conveyor 6, the packaging bags are converted into a horizontal state from a vertical state through a bag pouring mechanism of the automatic bag pouring conveyor 6 and are continuously conveyed forwards by the automatic bag pouring conveyor 6, the packaging bags are conveyed to a weight rechecking machine 8 through a slope conveyor 7 to recheck the weight of the packaging bags, the packaging bags with qualified weight are continuously conveyed forwards to an automatic vibration leveling conveyor 10 through an automatic removing machine 9, the qualified packaging bags are subjected to vibration leveling processing through an automatic vibration leveling shaping machine 10, the processed packaging bags are conveyed to an unpowered conveyor 11, and stacking processing is carried out manually; the packaging bags with unqualified weight are conveyed to the automatic rejecting machine 9, and then the unqualified packaging bags are rejected by the rejecting mechanism of the automatic rejecting machine 9.
When the structure of the rotary drum flaker 1 and the feed bin 14 is shown in the attached figures 9-10, caprolactam flaked by the scraper directly enters the feed bin 14 to be crushed and filtered, caprolactam powder with qualified granularity is sent into a double-helix automatic weighing and packaging machine to be weighed, and the weighed flaked pieces are filled into a packaging bag.
Other parts in this embodiment are all the prior art, and are not described herein again.
Claims (10)
1. A caprolactam flaking production process method is characterized in that: the method comprises the following steps:
(1) liquid caprolactam is conveyed into a cavity between a shell and a rotary drum of a rotary drum flaker from a storage tank through a conveying pump, the lower part of the rotary drum flaker is contacted with the liquid caprolactam in the cavity, a cooling medium is filled in the rotary drum of the rotary drum flaker, the liquid caprolactam is attached to the surface of the rotary drum when the rotary drum of the rotary drum flaker rotates, the material attached to the outer surface of the rotary drum is cooled to a solidifying point and solidified through the temperature difference between the material on the outer surface of the rotary drum and the cooling medium in the rotary drum, and when the rotary drum continues to rotate to the position of a scraper of the rotary drum flaker, the solid caprolactam on the surface of the rotary drum is scraped in a sheet form through the scraper;
(2) feeding the caprolactam slices scraped by the scraper into a double-helix automatic weighing and packaging machine for weighing, and filling the weighed slices into a packaging bag;
(3) conveying the packaging bag with the knot sheets on a conveying belt, and sealing the packaging bag by a heat sealing machine;
(4) the sealed packaging bags are continuously conveyed forwards through a conveying belt and sequentially pass through a bag pouring mechanism, a weight rechecking machine, an automatic rejecting machine, an automatic vibration leveling shaping machine and an unpowered conveyor, wherein the bag pouring mechanism converts the packaging bags from a vertical state to a horizontal state, the weight rechecking machine rechecks the weight of the packaging bags, the automatic rejecting machine rejects unqualified packaging bags out of the conveying belt, and the automatic vibration leveling shaping machine performs vibration leveling shaping on the qualified packaging bags.
2. The process of claim 1, wherein the caprolactam flaking process comprises: when the liquid caprolactam is conveyed into the drum sheeting machine from the storage tank, a hot water system is adopted for heat tracing, the temperature of the hot water is 90 ℃, and the temperature of the liquid caprolactam is 80-85 ℃.
3. The process of claim 1, wherein the caprolactam flaking process comprises: the cooling medium is chilled water or cold air; in the step (1), dry air is introduced into a cavity between a shell of the rotary drum flaker and the rotary drum.
4. A process according to claim 1, 2 or 3, characterized in that: the scraper of the rotary drum flaker is spiral and is consistent with the curved surface of the rotary drum, the enveloping degree of the scraper to the rotary drum is 150-180 degrees, the lower end of the scraper is positioned at one side of the discharge port of the rotary drum flaker, the scraper is a single-side cutting edge, the cutting edge is higher than the inner surface of the scraper, and the inner surface of the scraper is made of ceramic composite materials.
5. The process of claim 4, wherein the caprolactam flaking process comprises: when the scraper scrapes the solid caprolactam on the surface of the rotary drum, the solid caprolactam is contacted with the film product on the surface of the rotary drum from the upper end to the lower end in sequence for scraping.
6. The process of claim 5, wherein the caprolactam flaking process comprises: caprolactam flaking that the scraper scraped is sent into the feed bin that sets up on double helix automatic weighing packagine machine upper portion earlier and is smashed and filter, and caprolactam powder of qualified granularity is sent into double helix automatic weighing packagine machine again and is weighed.
7. The process of claim 6, wherein the caprolactam flaking process comprises: the utility model discloses a crushing device, including feed bin, screen cloth, motor, at least one spiral blade, every spiral blade has two heliciform blades that are 180 degrees contained angles and set up, the direction of rotation of two blades is unanimous, and the height difference that two blades are located, and the blade has the radian of downwarping or kickup, be provided with reducing mechanism and screen cloth in the feed bin, the screen cloth sets up in reducing mechanism's lower part, and reducing mechanism includes and is driven rotatory roller sword by the motor, is provided with at least one spiral blade along its axial interval on the cutter arbor of roller sword, every spiral blade has two heliciform blades that are 180 degrees contained angles and set up, and the direction of rotation of two blades is unanimous, and the blade is located the difference in height, and the blade has the radian of downwarping or kickup.
8. The process of claim 7, wherein the caprolactam flaking process comprises: caprolactam flakes scraped by a scraper directly fall into a storage bin for crushing.
9. The process of claim 8, wherein the caprolactam flaking process comprises: the screen cloth rotationally sets up in the feed bin, and the screen cloth is omega shape, the direction of rotation of screen cloth with the direction of rotation of roller sword is opposite, when the roller sword rotated, the screen cloth is counter-rotation simultaneously.
10. The process of claim 5, wherein the caprolactam flaking process comprises: the cleaning mechanism (21) is arranged on the scraper and comprises a cleaning motor (21-1), a gear (21-2) and a scraper (21-3) which are driven by the cleaning motor (21-1), a rack (1-5) and a limiting guide plate (1-6) are arranged at the outer side end of the scraper (1-3), a guide groove is arranged on the limiting guide plate (1-6), one end of a motor shaft of the cleaning motor (21-1) is movably arranged in the guide groove of the limiting guide plate (1-6), the gear (21-2) and a rotor of the cleaning motor (21-1) are connected into a whole, the gear (21-2) is meshed with the rack (1-5), the other end of the cleaning motor (21-1) is supported in a bearing shell (21-8) through a bearing, an auxiliary support rod (21-10) is arranged at the lower part of the bearing shell (21-8), one end of a scraper connecting rod (21-9) is fixedly connected with the end face of the bearing shell (21-8), the other end of the scraper connecting rod (21-9) is connected with a scraper (21-3) through an electric cylinder (21-4), and the scraper (21-3) can be in contact with the inner surface of the scraper (1-3); when the cleaning motor (21-1) rotates forwards, the electric cylinder (21-4) extends to enable the scraper (21-3) to move to the lower end to be in contact with the scraper (1-3) to clean the surface of the scraper, when the cleaning motor (21-1) rotates backwards, the electric cylinder (21-4) shortens, the scraper (21-3) moves upwards to be separated from the surface of the scraper (1-3), and cleaning is not carried out.
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| CN205731164U (en) * | 2016-06-21 | 2016-11-30 | 天能化工有限公司 | A kind of flaker |
| CN108970561A (en) * | 2018-07-27 | 2018-12-11 | 南京灵雀智能制造有限公司 | A kind of liquid caprolactam sheeting energy saver |
| CN210096980U (en) * | 2019-02-27 | 2020-02-21 | 南京合创工程设计有限公司 | Liquid caprolactam sheeting energy-saving complete equipment |
| CN211618347U (en) * | 2019-12-31 | 2020-10-02 | 鄂尔多斯市君正能源化工有限公司 | Full-automatic packaging system for flake sodium hydroxide |
| CN113578197A (en) * | 2021-09-02 | 2021-11-02 | 唐山三孚硅业股份有限公司 | Drum type alkali flaker |
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2022
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| CN205731164U (en) * | 2016-06-21 | 2016-11-30 | 天能化工有限公司 | A kind of flaker |
| CN108970561A (en) * | 2018-07-27 | 2018-12-11 | 南京灵雀智能制造有限公司 | A kind of liquid caprolactam sheeting energy saver |
| CN210096980U (en) * | 2019-02-27 | 2020-02-21 | 南京合创工程设计有限公司 | Liquid caprolactam sheeting energy-saving complete equipment |
| CN211618347U (en) * | 2019-12-31 | 2020-10-02 | 鄂尔多斯市君正能源化工有限公司 | Full-automatic packaging system for flake sodium hydroxide |
| CN113578197A (en) * | 2021-09-02 | 2021-11-02 | 唐山三孚硅业股份有限公司 | Drum type alkali flaker |
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