CN112125780B - Device for reducing water content of solid neopentyl glycol and dehydration method - Google Patents
Device for reducing water content of solid neopentyl glycol and dehydration method Download PDFInfo
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- CN112125780B CN112125780B CN202011117678.XA CN202011117678A CN112125780B CN 112125780 B CN112125780 B CN 112125780B CN 202011117678 A CN202011117678 A CN 202011117678A CN 112125780 B CN112125780 B CN 112125780B
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- neopentyl glycol
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/78—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by condensation or crystallisation
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- 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
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- Crystallography & Structural Chemistry (AREA)
Abstract
The invention discloses a device for reducing water content of solid neopentyl glycol, which mainly solves the problem that the water content of a product is high and the quality of the product is affected because the water is easy to absorb in the conventional conveying and packaging process of neopentyl glycol solidified knot sheets. Comprising the following steps: the device comprises a flaker, a steel belt, an ice maker, a scraper and a dehumidifier, wherein the steel belt is arranged on the flaker, and a spraying machine is arranged on the steel belt and is used for spraying chilled water; the ice machine is connected with the spraying machine and is used for providing chilled water; the scraper is arranged at the rear lower part of the flaker; the dehumidifier is connected with the ice maker and is connected with the rear end of the scraper. The invention has the advantage of reducing the water content of the solid neopentyl glycol.
Description
Technical Field
The invention relates to the technical field of industrial production of neopentyl glycol, in particular to a device for reducing water content of solid neopentyl glycol.
Background
Neopentyl glycol can be used for producing unsaturated resins, polyester powder coatings, surfactants, oil-free alkyd resins, polyurethane foam plastics, polymerization inhibitors, plasticizers, printing inks, lubricating oil additives and the like, is also an excellent solvent, and can be used for the selective separation of aromatic hydrocarbons and cycloalkyl hydrocarbons.
Neopentyl glycol products are classified into solid neopentyl glycol and aqueous solutions of neopentyl glycol, the water content of the solid neopentyl glycol being less than 0.2% and the aqueous solutions of neopentyl glycol being generally formulated for sale at 90% concentration. The solid neopentyl glycol has hygroscopicity, and when the air humidity is high, the neopentyl glycol can easily absorb moisture in the air in the conveying process, so that the solid neopentyl glycol product has high moisture content and is unqualified
Neopentyl glycol melting point is about 125 ℃, after the neopentyl glycol in a molten state is conveyed to a flaker by a pipeline, the steel belt of the flaker is sprayed with low-temperature chilled water to solidify the neopentyl glycol into flakes, and the flakes are crushed and packaged. The water content of the high-grade solid neopentyl glycol product is required to be not more than 0.2%, but the neopentyl glycol has hygroscopicity, and the neopentyl glycol solidified sheet is easy to absorb water in the conveying and packaging process, so that the water content of the product is high, and the product quality is affected. Neopentyl glycol absorbs moisture mainly from two sources:
1. the low-temperature freezing water is adopted to spray the lower part of the steel belt of the flaker, so that neopentyl glycol is rapidly cooled and solidified to form flakes, after the neopentyl glycol on the steel belt is scraped by a scraper, the water in the air is condensed into water drops when meeting running low Wen Gangdai, the water drops are attached to the surface of the steel belt, and the molten neopentyl glycol absorbs the water on the steel belt when being sent to the steel belt of the condensed water drops, so that the water content of a neopentyl glycol product is high.
2. In addition, neopentyl glycol is crushed by the crusher and then enters the scraper and is conveyed to the bin for packaging and storing, the cooled low-temperature neopentyl glycol contacts with high-temperature and high-humidity air, the surface water vapor partial pressure of the neopentyl glycol is lower than that of the high-temperature and high-humidity air, so that the moisture in the air is continuously transferred to the surface of the neopentyl glycol, and the neopentyl glycol has hygroscopicity.
Disclosure of Invention
The invention aims to provide a device for reducing the moisture of solid neopentyl glycol, which aims to solve the problems that the moisture is easy to be absorbed in the existing conveying and packaging process of neopentyl glycol solidified knot sheets, so that the moisture content of products is high and the quality of the products is affected.
In order to achieve the above purpose, the embodiment of the present invention adopts the following scheme:
an apparatus for reducing the moisture content of solid neopentyl glycol comprising:
a sheeting machine;
the steel belt is arranged on the flaker, a spraying machine is arranged on the steel belt, and the spraying machine is used for spraying chilled water;
the ice machine is connected with the spraying machine and is used for providing chilled water;
the scraper is arranged at the rear lower part of the flaker;
and the dehumidifier is connected with the ice maker and is connected with the rear end of the scraper machine.
Through carrying the neopentyl glycol of molten state to the flaker through the pipeline, the chilled water that ice maker produced sprays on the rigid strip through the spray machine, solidify the neopentyl glycol rapidly, obtain cooling and drying wind after the air dehumidification that the dehumidifier sent the air-blower later, the cooling and drying wind that blows out gets into through the scraper machine rear portion to blow into on the steel band, prevent high temperature high humidity air contact low temperature steel band and make the moisture condensation drop in the air adhere to the steel band surface, prevent that molten state neopentyl glycol solidification from flaking time absorption steel band surface moisture leads to the product water content too high.
Preferably, a conveying pipeline is arranged at the front end of the scraper machine, and the conveying pipeline is used for conveying neopentyl glycol in a molten state.
Preferably, the front end of the flaker is connected with a freezing water tank, the freezing water tank is connected with the ice maker, and a second circulating pump is arranged between the freezing water tank and the ice maker.
Preferably, the dehumidifier is connected with the chilled water tank, and a blower is connected to the rear end of the dehumidifier, and the blower is used for blowing air into the dehumidifier.
Preferably, a crusher is arranged at the rear end of the flaker, and the crusher is used for crushing the solid neopentyl glycol.
Preferably, a crushing feed opening is arranged below the crusher, and a wind shield is arranged in the crushing feed opening.
Preferably, the rear end of the scraper machine is provided with a scraper blanking port, and the bottom of the scraper blanking port is provided with a closed storage bin.
Preferably, the front part of the flaker is connected with a water washing tower.
Preferably, a first circulating pump is arranged at the bottom of the water washing tower and is used for circulating the absorption liquid in the water washing tower.
Preferably, the top of the water washing tower is connected with an induced draft fan, and the induced draft fan is used for extracting gas in the absorption tower.
A process for dehydrating a device for reducing the moisture content of solid neopentyl glycol comprising:
pouring neopentyl glycol in a molten state into a conveying pipeline, enabling the neopentyl glycol to enter the front end of a flaker through the conveying pipeline and uniformly distributed on a steel belt of the flaker, spraying frozen water generated by the ice maker on the steel belt by a spraying machine, enabling the neopentyl glycol to be rapidly solidified, conveying and collecting the sprayed frozen water through the pipeline by gravity, and flowing the frozen water into a frozen water tank;
the neopentyl glycol solids are conveyed to the rear end of the flaker through a steel belt, crushed by a crusher, scattered out of a crushing discharging opening to a scraper, and conveyed out of the scraper discharging opening to a closed bin through the scraper for concentration;
the other path of frozen water generated by the ice machine flows back into the frozen water tank through the dehumidifier, the dehumidifier dehumidifies the air sent by the blower to obtain cooling and drying air, the cooling and drying air enters the scraper and contacts with the neopentyl glycol and is led out from the front end of the scraper, and the cooling and drying air is sent to the flaker to purge the low-temperature steel belt, so that the temperature is reduced, and water is not generated;
cooling and drying air is pumped to a water washing tower by an induced draft fan after passing through a flaker, neopentyl glycol solid powder carried in the cooling and drying air is absorbed and removed by the water washing tower, the cooling and drying air after water washing is discharged to the atmosphere, and the absorption liquid with the concentration of 15% is sent to a neopentyl glycol aqueous solution production line for co-production of 90% neopentyl glycol aqueous solution.
Preferably, neopentyl glycol in a molten state at 130-145 ℃ is introduced into the conveying pipeline, and chilled water generated by the ice maker is 5-7 ℃.
Preferably, the dew point of the cooling and drying air is 8-12 ℃, and the air quantity is 5000-8000m 3 /h。
Preferably, the neopentyl glycol solid water content is maintained between 0.16 and 0.20% when the cooling and drying wind blows the steel belt of the scraper and the flaker.
The invention has the beneficial effects that:
the freezing water generated by the ice maker is sprayed onto the neopentyl glycol in a molten state through the spraying machine to solidify the neopentyl glycol, and is conveyed and collected through the scraper machine after being crushed through the crusher, the air is dehumidified by the dehumidifier to obtain cooling and drying air in the period, the cooling and drying air is blown out by the blower, enters through the rear part of the scraper machine and is blown onto the steel belt, so that the water in the air is prevented from condensing into water droplets to be attached to the surface of the steel belt due to the fact that the high-temperature high-humidity air contacts with the low-temperature steel belt, and the water content of the product is prevented from being too high due to the fact that the water on the surface of the steel belt is absorbed when the neopentyl glycol in the molten state solidifies and flakes; the invention has the beneficial effect of reducing the water content of the solid neopentyl glycol.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
1. Neopentyl glycol 2, flaker 3, steel belt
4. Crusher 5, crushing feed opening 6 and wind deflector
7. Scraper 8, scraper blanking opening 9 and airtight bin
10. A water washing tower 11, an induced draft fan 12 and a first circulating pump
13. Absorption liquid 14, chilled water tank 15 and dehumidifier
16. Ice maker 17, blower 18, second circulation pump
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," an, "" the first, "" the second, "" the third, "" the fourth, "" the fifth, "and the sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
For purposes of brevity and description, the principles of the embodiments are described primarily by reference to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is apparent that. It will be apparent to one of ordinary skill in the art that the embodiments may be practiced without limitation to these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
As shown in FIG. 1, the invention is a device for reducing the water content of solid neopentyl glycol 1, which is characterized by comprising: the device comprises a flaker 2, a steel belt 3, an ice maker 16, a scraper 7 and a dehumidifier 15, wherein the steel belt 3 is arranged on the flaker 2, and a spraying machine is arranged on the steel belt 3 and is used for spraying chilled water; the ice maker 16 is connected with the spraying machine, and the ice maker 16 is used for providing chilled water; the scraper 7 is arranged at the rear lower part of the flaker 2; the dehumidifier 15 is connected to the ice maker 16 and is connected to the rear end of the scraper 7. The neopentyl glycol 1 in a molten state is conveyed to the flaker 2 through a pipeline, chilled water generated by the ice maker 16 is sprayed on a rigid belt through a spraying machine, the neopentyl glycol 1 is rapidly solidified, then air is dehumidified through a dehumidifier 15, blown cooling and drying air enters through the rear part of the scraper 7 and is blown onto the steel belt 3, the high-temperature and high-humidity air is prevented from contacting with the low-temperature steel belt 3, so that moisture in the air is condensed into water drops to be attached to the surface of the steel belt 3, and the water content of a product is prevented from being too high due to the fact that moisture on the surface of the steel belt 3 is absorbed when the neopentyl glycol 1 in the molten state is solidified and flaked.
Specifically, a conveying pipe for conveying the neopentyl glycol 1 solution in a molten state is provided on the front end of the scraper 7.
Specifically, the front end of the flaker 2 is connected with a frozen water tank 14, the frozen water tank 14 is connected with an ice maker 16, and a second circulating pump 18 is arranged between the frozen water tank 14 and the ice maker 16.
Specifically, the dehumidifier 15 is connected to the chilled water tank 14, and a blower 17 is connected to the rear end, and the blower 17 is used to blow air into the dehumidifier 15.
Specifically, the rear end of the flaker 2 is provided with a crusher 4, and the crusher 4 is used for crushing the solid neopentyl glycol 1.
Specifically, a crushing feed opening 5 is arranged below the crusher 4, and a wind deflector 6 is arranged in the crushing feed opening 5.
Specifically, the rear end of scraper 7 is equipped with scraper blade feed opening 8, and the bottom of scraper blade feed opening 8 is equipped with airtight feed bin 9.
Specifically, the front part of the flaker 2 is connected with a water washing tower 10.
Specifically, the bottom of the water scrubber 10 is provided with a first circulation pump 12, and the first circulation pump 12 is used to circulate the absorption liquid in the water scrubber 10.
Specifically, the top of the water scrubber 10 is connected with an induced draft fan 11, and the induced draft fan 11 is used for extracting gas in the absorption tower.
A process for dehydrating a device for reducing the water content of solid neopentyl glycol 1 comprising:
pouring neopentyl glycol 1 in a molten state into a conveying pipeline, enabling the neopentyl glycol 1 to enter the front end of a flaker 2 through the conveying pipeline, uniformly distributing the neopentyl glycol 1 on a steel belt 3 of the flaker 2, spraying chilled water generated by an ice maker 16 on the steel sheet by a spraying machine, enabling the neopentyl glycol 1 to be rapidly solidified, conveying and collecting the sprayed chilled water through the pipeline by gravity, and then flowing the chilled water into a chilled water tank 14;
the neopentyl glycol 1 solid is conveyed to the rear end of the flaker 2 through the steel belt 3, crushed by the crusher 4, and the crushed neopentyl glycol 1 solid is scattered out of the crushing feed opening 5 to the scraper 7, and then conveyed out of the scraper feed opening 8 to the sealed feed bin 9 through the scraper 7 for concentration;
the other path of frozen water generated by the ice maker 16 flows back into the frozen water tank 14 through the dehumidifier 15, the air sent by the blower 17 of the dehumidifier 15 is dehumidified to obtain cooling and drying air, the cooling and drying air enters the scraper 7 to be contacted with the neopentyl glycol 1 and is led out from the front end of the scraper 7, and the cooling and drying air is sent to the flaker 2 to purge the low-temperature steel belt 3, so that the temperature is reduced, and the water is not generated;
after passing through the flaker 2, the cooling and drying air is pumped to a water washing tower 10 by an induced draft fan 11, neopentyl glycol 1 solid powder carried in the cooling and drying air is absorbed and removed by the water washing tower 10, the cooling and drying air after water washing is discharged to the atmosphere, and the absorbing liquid with the concentration of 15% is sent to a neopentyl glycol 1 aqueous solution production line for co-production of 90% neopentyl glycol 1 aqueous solution.
Specifically, neopentyl glycol 1 in a molten state at 130-145 ℃ is introduced into a conveying pipeline, and chilled water generated by an ice maker 16 is 5-7 ℃.
Specifically, the dew point of cooling and drying wind is 8-12 ℃, and the wind quantity is 5000-8000m 3 /h。
Specifically, the solid water content of the neopentyl glycol 1 can be maintained between 0.16 and 0.20 percent when the cooling and drying wind blows the steel belt 3 of the scraper 7 and the flaker 2.
While the foregoing describes the illustrative embodiments of the present invention so that those skilled in the art may understand the present invention, the present invention is not limited to the specific embodiments, and all inventive innovations utilizing the inventive concepts are herein within the scope of the present invention as defined and defined by the appended claims, as long as the various changes are within the spirit and scope of the present invention.
Claims (7)
1. An apparatus for reducing the moisture content of solid neopentyl glycol comprising:
a sheeting machine;
the steel belt is arranged on the flaker, a spraying machine is arranged on the steel belt, and the spraying machine is used for spraying chilled water;
the ice machine is connected with the spraying machine and is used for providing chilled water;
the scraper is arranged at the rear lower part of the flaker;
the dehumidifier is connected with the ice machine and is connected to the rear end of the scraper machine;
the front end of the flaker is connected with a frozen water tank which is connected with the ice maker, and a second circulating pump is arranged between the frozen water tank and the ice maker;
the dehumidifier is connected with the frozen water tank, and the rear end of the dehumidifier is connected with a blower which is used for blowing air into the dehumidifier;
the front part of the flaker is connected with a water washing tower.
2. The apparatus for reducing moisture of solid neopentyl glycol as defined in claim 1, wherein a conveying pipe for feeding neopentyl glycol in a molten state is provided at a front end of the scraper.
3. The apparatus for reducing the moisture of solid neopentyl glycol of claim 1, wherein a crusher is provided at a rear end of the sheeting machine, the crusher being for crushing the solid neopentyl glycol.
4. A device for reducing the moisture of solid neopentyl glycol according to claim 3, wherein a crushing feed opening is arranged below the crusher, and a wind deflector is arranged in the crushing feed opening.
5. The device for reducing the water content of the solid neopentyl glycol according to claim 1, wherein a scraper blanking opening is arranged at the rear end of the scraper machine, and a closed storage bin is arranged at the bottom of the scraper blanking opening.
6. The apparatus for reducing water content of solid neopentyl glycol as defined in claim 1, wherein a first circulation pump is provided at a bottom of the water scrubber for circulating an absorption liquid in the water scrubber.
7. A dehydration process for reducing the moisture content of solid neopentyl glycol comprising:
pouring neopentyl glycol in a molten state into a conveying pipeline, enabling the neopentyl glycol to enter the front end of a flaker through the conveying pipeline and uniformly distributed on a steel belt of the flaker, spraying frozen water generated by the ice maker on the steel belt by a spraying machine, enabling the neopentyl glycol to be rapidly solidified, conveying and collecting the sprayed frozen water through the pipeline by gravity, and flowing the frozen water into a frozen water tank;
the neopentyl glycol solids are conveyed to the rear end of the flaker through a steel belt, crushed by a crusher, scattered out of a crushing discharging opening to a scraper, and conveyed out of the scraper discharging opening to a closed bin through the scraper for concentration;
the other path of frozen water generated by the ice machine flows back into the frozen water tank through the dehumidifier, the dehumidifier dehumidifies the air sent by the blower to obtain cooling and drying air, the cooling and drying air enters the scraper and contacts with the neopentyl glycol and is led out from the front end of the scraper, and the cooling and drying air is sent to the flaker to purge the low-temperature steel belt, so that the temperature is reduced, and water is not generated;
cooling and drying air is pumped to a water washing tower by an induced draft fan after passing through a flaker, neopentyl glycol solid powder carried in the cooling and drying air is absorbed and removed by the water washing tower, the cooling and drying air after water washing is discharged to the atmosphere, and the absorption liquid is sent to a 90% neopentyl glycol aqueous solution production line to co-produce 90% neopentyl glycol aqueous solution.
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| CN202011117678.XA CN112125780B (en) | 2020-10-19 | 2020-10-19 | Device for reducing water content of solid neopentyl glycol and dehydration method |
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| CN105371672A (en) * | 2015-12-14 | 2016-03-02 | 吉林市道特化工科技有限责任公司 | Method for heating flaker steel strip |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105371672A (en) * | 2015-12-14 | 2016-03-02 | 吉林市道特化工科技有限责任公司 | Method for heating flaker steel strip |
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