CN112125780A - 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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- CN112125780A CN112125780A CN202011117678.XA CN202011117678A CN112125780A CN 112125780 A CN112125780 A CN 112125780A CN 202011117678 A CN202011117678 A CN 202011117678A CN 112125780 A CN112125780 A CN 112125780A
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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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Abstract
The invention discloses a device for reducing moisture of solid neopentyl glycol, and mainly solves the problems that moisture is easily absorbed in the existing neopentyl glycol curing, sheeting, conveying and packaging processes, so that the moisture content of a product is high, and the quality of the product is influenced. The method comprises 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 sprayer is arranged on the steel belt and used for spraying chilled water; the ice maker is connected with the spray thrower 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 conveyor. The invention achieves the advantage that the water content of the solid neopentyl glycol can be reduced.
Description
Technical Field
The invention relates to the technical field of neopentyl glycol industrial production, in particular to a device for reducing the moisture content of solid neopentyl glycol.
Background
Neopentyl glycol can be used for producing unsaturated resin, polyester powder coating, surfactant, oil-free alkyd resin, polyurethane foam plastic, polymerization inhibitor, plasticizer, printing ink, lubricating oil additive and the like, and is also an excellent solvent and can be used for selectively separating aromatic hydrocarbon and naphthenic hydrocarbon.
The neopentyl glycol product is divided into solid neopentyl glycol and a neopentyl glycol aqueous solution, the water content of the solid neopentyl glycol superior product is less than 0.2%, and the neopentyl glycol aqueous solution is generally prepared into a concentration of 90% for sale. The solid neopentyl glycol has hygroscopicity, and when the humidity of air is high, the neopentyl glycol can easily absorb moisture in the air in the conveying process, so that the moisture content of the solid neopentyl glycol product is high, and the product is unqualified
And the melting point of the neopentyl glycol is about 125 ℃, the neopentyl glycol in a molten state is conveyed to a flaker through a pipeline, a steel belt of the flaker is sprayed with low-temperature chilled water to enable the neopentyl glycol to be solidified and flaked, and the neopentyl glycol is packaged after being crushed. The moisture content of a superior solid neopentyl glycol product is required to be not more than 0.2%, but the neopentyl glycol has hygroscopicity, and the moisture is easily absorbed in the process of conveying and packaging the solidified neopentylene glycol in a sheeting mode, so that the moisture content of the product is high, and the quality of the product is influenced. Moisture uptake by neopentyl glycol is primarily due to two aspects:
1. and after the neopentyl glycol on the steel belt is scraped by a scraper, water in the air is condensed into water drops when meeting the running low-temperature steel belt, and then the water is attached to the surface of the steel belt, and when the molten neopentyl glycol is sent to the steel belt with the water drops condensed, the water on the steel belt is absorbed, so that the water content of a neopentyl glycol product is high.
2. In addition, neopentyl glycol gets into after the breaker is broken and scrapes trigger and carry to feed bin packing storage process, and the air of high temperature and high humidity is contacted to the low temperature neopentyl glycol that cools, and the moisture partial pressure of neopentyl glycol's surface is less than the moisture partial pressure of high temperature and high humidity air, causes the moisture in the air and constantly shifts to the neopentyl glycol surface, and neopentyl glycol itself has the hygroscopicity in addition, and this process can lead to the neopentyl glycol high moisture content equally, influences product quality.
Disclosure of Invention
The invention aims to provide a device for reducing the moisture content of solid neopentyl glycol, and aims to solve the problems that the moisture content of a product is high and the quality of the product is influenced because the moisture is easily absorbed in the existing neopentyl glycol curing, sheeting, conveying and packaging processes.
In order to achieve the purpose, the embodiment of the invention adopts the following scheme:
an apparatus for reducing the moisture content of solid neopentyl glycol, comprising:
sheeting machine;
the steel belt is arranged on the flaker, and a spraying machine is arranged on the steel belt and used for spraying chilled water;
the ice machine is connected with the sprayer and is used for providing chilled water;
the scraper is arranged below the rear part of the flaker;
and the dehumidifier is connected with the ice maker and is connected to the rear end of the scraper conveyor.
The neopentyl glycol in a molten state is conveyed to a flaking machine through a pipeline, chilled water generated by the ice machine is sprayed on a steel strip through a spraying machine, the neopentyl glycol is rapidly solidified, air sent by an air blower is dehumidified through a dehumidifier and then is obtained into cooling and drying air, the blown cooling and drying air enters through the rear part of a scraper machine and is blown into a steel strip, the situation that water in the air is condensed into water drops to be attached to the surface of the steel strip due to the fact that high-temperature and high-humidity air contacts a low-temperature steel strip is prevented, and the situation that the water on the surface of the steel strip is absorbed when the molten neopentyl glycol is solidified and.
Preferably, a conveying pipeline is arranged at the front end of the scraper conveyor and is used for conveying neopentyl glycol in a molten state.
Preferably, a freezing water tank is connected to the front end of the flake forming machine, the freezing water tank is connected to the ice machine, and a second circulating pump is arranged between the freezing water tank and the ice machine.
Preferably, the dehumidifier is connected with the freezing water tank, and the rear end of the dehumidifier is connected with a blower which is used for supplying air into the dehumidifier.
Preferably, the rear end of the flaker is provided with a crusher 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 conveyor is provided with a scraper feed opening, and the bottom of the scraper feed opening is provided with a closed bin.
Preferably, the front part of the flaker is connected with a water washing tower.
Preferably, the bottom of the water washing tower is provided with a first circulating pump, and the first circulating pump is used for circulating the absorption liquid in the water washing tower.
Preferably, the top of the water scrubber is connected with an induced draft fan, and the induced draft fan is used for extracting gas in the absorption tower.
A method for dewatering an apparatus for reducing the moisture content of solid neopentyl glycol comprising:
pouring the neopentyl glycol in a molten state into a conveying pipeline, wherein the neopentyl glycol enters the front end of a flaker through the conveying pipeline and is uniformly distributed on a steel strip of the flaker, one path of chilled water generated by the flaker is sprayed on the steel strip through a spraying machine, so that the neopentyl glycol is rapidly solidified, and the sprayed chilled water is conveyed and collected by virtue of the pipeline by virtue of gravity and then flows into a chilled water tank;
conveying the neopentyl glycol solid to the rear end of a flaker through a steel belt, crushing the neopentyl glycol solid by a crusher, scattering the crushed neopentyl glycol solid, dropping a crushed feed opening onto a scraper conveyor, and conveying the neopentyl glycol solid by the scraper conveyor, dropping the crushed feed opening into a closed bin for concentration;
the other path of chilled water generated by the ice maker flows back into the chilled water tank through the dehumidifier, the dehumidifier dehumidifies air sent by the blower to obtain cooling and drying air, the cooling and drying air enters the scraper conveyor to be contacted with neopentyl glycol and then is led out from the front end of the scraper conveyor, the cooling and drying air is sent to the flaker to purge the low-temperature steel belt, and the temperature is reduced so that no water is generated;
and (3) pumping the cooling and drying air to a washing tower by using an induced draft fan after the cooling and drying air passes through a flaking machine, absorbing and removing neopentyl glycol solid powder carried in the cooling and drying air by using the washing tower, discharging the cooled and drying air after washing to the atmosphere, and sending the absorbing solution with the concentration of 15% to a neopentyl glycol aqueous solution production line for co-producing 90% neopentyl glycol aqueous solution.
Preferably, neopentyl glycol in a molten state at 130-145 ℃ is introduced into the conveying pipeline, and the frozen 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 volume is 5000-3/h。
Preferably, the moisture content of the neopentyl glycol solid is maintained between 0.16 and 0.20% when the steel strip of the scraper and flaker is subjected to cooling drying and air blowing.
The invention has the beneficial effects that:
according to the invention, chilled water generated by an ice maker is sprayed onto neopentyl glycol in a molten state through a sprayer to be solidified, and then is conveyed and collected through a scraper conveyor after being crushed by a crusher, during the process, a dehumidifier is used for dehumidifying air to obtain cooling and drying air, a blower blows out the cooling and drying air, the blown out cooling and drying air enters through the rear part of the scraper conveyor and is blown into a steel belt, so that high-temperature and high-humidity air is prevented from contacting a low-temperature steel belt to condense water in the air into water drops to be attached to the surface of the steel belt, and the phenomenon that the water content of a product is overhigh due to the fact that the water on the; the invention has the beneficial effect of reducing the water content of the solid neopentyl glycol.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
1. Neopentyl glycol 2, flaker 3, steel band
4. Crusher 5, crushing feed opening 6 and wind shield
7. Scraper 8, scraper feed opening 9 and closed stock bin
10. Washing tower 11, draught fan 12, first circulating pump
13. Absorption liquid 14, freezing 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 clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "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 otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. But it is obvious. To one of ordinary skill in the art, 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 present invention is an apparatus for reducing the moisture content of solid neopentyl glycol 1, comprising: the device comprises a flaker 2, a steel belt 3, an ice maker 16, a scraper conveyor 7 and a dehumidifier 15, wherein the steel belt 3 is arranged on the flaker 2, and a sprayer is arranged on the steel belt 3 and used for spraying chilled water; the ice machine 16 is connected with the spray machine, and the ice machine 16 is used for providing chilled water; the scraper conveyor 7 is arranged at the rear lower part of the flaker 2; the dehumidifier 15 is connected to the ice maker 16 and to the rear end of the flight 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 sprayer, 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 conveyor 7 and is blown into the steel belt 3, the situation that water in the air is condensed into water drops to be attached to the surface of the steel belt 3 due to the fact that high-temperature and high-humidity air contacts the low-temperature steel belt 3 is prevented, and the situation that the water content of a product is too high due to the fact that the water on the surface of the steel belt 3 is absorbed.
Specifically, a conveying pipeline is arranged at the front end of the scraper 7, and the conveying pipeline is used for conveying the neopentyl glycol 1 solution in a molten state.
Specifically, the front end of the flaker 2 is connected with a freezing water tank 14, the freezing water tank 14 is connected with an ice maker 16, and a second circulating pump 18 is arranged between the freezing water tank 14 and the ice maker 16.
Specifically, the dehumidifier 15 is connected to the freezing water tank 14, and a blower 17 is connected to a rear end of the dehumidifier 15, and the blower 17 blows 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 shield 6 is arranged in the crushing feed opening 5.
Specifically, the rear end of the scraper conveyor 7 is provided with a scraper feed opening 8, and the bottom of the scraper feed opening 8 is provided with a closed bin 9.
Specifically, the front part of the flaker 2 is connected with a water washing tower 10.
Specifically, the bottom of the water washing tower 10 is provided with a first circulation pump 12, and the first circulation pump 12 is used for circulating the absorption liquid in the water washing tower 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 method for dewatering an apparatus for reducing the moisture content of solid neopentyl glycol 1 comprising:
pouring the neopentyl glycol 1 in a molten state into a conveying pipeline, wherein the neopentyl glycol 1 enters the front end of a flaker 2 through the conveying pipeline and is uniformly distributed on a steel strip 3 of the flaker 2, one path of chilled water generated by a flaker 16 is sprayed on a steel sheet through a sprayer, so that the neopentyl glycol 1 is rapidly solidified, and the sprayed chilled water is conveyed and collected by virtue of a pipeline by virtue of gravity and then flows into a chilled water tank 14;
conveying the neopentyl glycol 1 solid to the rear end of a flaker 2 through a steel belt 3, crushing the neopentyl glycol by a crusher 4, scattering the crushed neopentyl glycol 1 solid out of a crushing feed opening 5 to a scraper 7, and conveying the neopentyl glycol 1 solid out of a scraper feed opening 8 to a closed bin 9 through the scraper 7 for concentration;
the other path of chilled water generated by the ice maker 16 flows back into the chilled water tank 14 through the dehumidifier 15, 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 then is led out from the front end of the scraper 7, the cooling and drying air is sent to the flaker 2 to purge the low-temperature steel strip 3, the temperature is reduced, and therefore no water is generated;
and (2) after passing through a flaking machine 2, pumping the cooling and drying air to a water washing tower 10 by an induced draft fan 11, absorbing and removing neopentyl glycol 1 solid powder carried in the cooling and drying air by the water washing tower 10, discharging the cooled and drying air after washing to the atmosphere, and sending the absorbing solution with the concentration of 15% 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 the conveying pipeline, and the frozen water generated by the ice maker 16 is 5-7 ℃.
Specifically, the dew point of the cooling and drying air is 8-12 ℃, and the air volume is 5000-3/h。
Specifically, when the steel strip 3 of the scraper conveyor 7 and the flaker 2 is subjected to cooling drying and air blowing, the solid water content of the neopentyl glycol 1 can be maintained between 0.16 and 0.20 percent.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.
Claims (10)
1. An apparatus for reducing the moisture content of solid neopentyl glycol, comprising:
sheeting machine;
the steel belt is arranged on the flaker, and a spraying machine is arranged on the steel belt and used for spraying chilled water;
the ice machine is connected with the sprayer and is used for providing chilled water;
the scraper is arranged below the rear part of the flaker;
and the dehumidifier is connected with the ice maker and is connected to the rear end of the scraper conveyor.
2. The device for reducing the moisture content of solid neopentyl glycol according to claim 1, wherein the scraper is provided with a delivery duct at its leading end for feeding the neopentyl glycol in molten state.
3. The device for reducing the moisture content of the solid neopentyl glycol according to claim 1, wherein a frozen water tank is connected to the front end of the flake forming machine and is connected with the ice machine, and a second circulating pump is arranged between the frozen water tank and the ice machine.
4. The device for reducing the moisture content of solid neopentyl glycol as claimed in claim 3, wherein said dehumidifier is connected to said freezing water tank and connected at its rear end to a blower for supplying air into the dehumidifier.
5. The apparatus for reducing the moisture content of solid neopentyl glycol as claimed in claim 1, wherein a crusher is provided at the rear end of said sheeting apparatus for crushing solid neopentyl glycol.
6. The device for reducing the moisture content of solid neopentyl glycol according to claim 5, wherein a crushing feed opening is arranged below the crusher, and a wind shield is arranged in the crushing feed opening.
7. The device for reducing the moisture content of the solid neopentyl glycol according to claim 1, wherein a scraper feed opening is formed in the rear end of the scraper conveyor, and a closed bin is arranged at the bottom of the scraper feed opening.
8. The apparatus for reducing the moisture content of solid neopentyl glycol as claimed in claim 1, wherein a water washing column is connected to the front part of said sheeting apparatus.
9. The apparatus as claimed in claim 8, wherein the bottom of the water scrubber is provided with a first circulation pump for circulating the absorption liquid in the water scrubber.
10. A method for dewatering an apparatus for reducing the moisture content of solid neopentyl glycol comprising:
pouring the neopentyl glycol in a molten state into a conveying pipeline, wherein the neopentyl glycol enters the front end of a flaker through the conveying pipeline and is uniformly distributed on a steel strip of the flaker, one path of chilled water generated by the flaker is sprayed on the steel strip through a spraying machine, so that the neopentyl glycol is rapidly solidified, and the sprayed chilled water is conveyed and collected by virtue of the pipeline by virtue of gravity and then flows into a chilled water tank;
conveying the neopentyl glycol solid to the rear end of a flaker through a steel belt, crushing the neopentyl glycol solid by a crusher, scattering the crushed neopentyl glycol solid, dropping a crushed feed opening onto a scraper conveyor, and conveying the neopentyl glycol solid by the scraper conveyor, dropping the crushed feed opening into a closed bin for concentration;
the other path of chilled water generated by the ice maker flows back into the chilled water tank through the dehumidifier, the dehumidifier dehumidifies air sent by the blower to obtain cooling and drying air, the cooling and drying air enters the scraper conveyor to be contacted with neopentyl glycol and then is led out from the front end of the scraper conveyor, the cooling and drying air is sent to the flaker to purge the low-temperature steel belt, and the temperature is reduced so that no water is generated;
and (3) pumping the cooling and drying air to a washing tower by using an induced draft fan after the cooling and drying air passes through a flaking machine, absorbing and removing neopentyl glycol solid powder carried in the cooling and drying air by using the washing tower, discharging the cooled and drying air after washing to the atmosphere, and sending the absorption liquid to a 90% neopentyl glycol aqueous solution production line to co-produce a 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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| 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605230A (en) * | 2022-04-06 | 2022-06-10 | 山东久安化学工业有限公司 | Method and equipment for preparing neopentyl glycol by adopting sodium formate method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114605230A (en) * | 2022-04-06 | 2022-06-10 | 山东久安化学工业有限公司 | Method and equipment for preparing neopentyl glycol by adopting sodium formate method |
| CN114605230B (en) * | 2022-04-06 | 2023-09-19 | 山东久安化学工业有限公司 | Method for preparing neopentyl glycol by adopting sodium formate method |
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