CN113880114A - Salt production process capable of controlling solid-liquid ratio of salt product - Google Patents

Salt production process capable of controlling solid-liquid ratio of salt product Download PDF

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CN113880114A
CN113880114A CN202110979678.9A CN202110979678A CN113880114A CN 113880114 A CN113880114 A CN 113880114A CN 202110979678 A CN202110979678 A CN 202110979678A CN 113880114 A CN113880114 A CN 113880114A
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salt
liquid ratio
solid
controlling
production process
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CN113880114B (en
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裴贵定
马朝晖
曹守彬
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Jiangsu Ruihong Salt Industry Co ltd
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Jiangsu Ruihong Salt Industry Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D3/00—Halides of sodium, potassium or alkali metals in general
    • C01D3/04—Chlorides
    • C01D3/06—Preparation by working up brines; seawater or spent lyes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/18—Dehydration
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    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D201/00—Coating compositions based on unspecified macromolecular compounds
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives

Abstract

The invention discloses a salt production process by controlling the solid-liquid ratio of a salt product, and particularly relates to the technical field of nitrate production processes. In the first step, salt slurry is prepared; in the second step, a reinforcing film is sprayed on the inner wall of the centrifuge, a fluorescent lamp is additionally arranged, and the reinforcing film and the fluorescent lamp are matched with each other, so that the evaporation treatment effect on the water in the salt slurry can be effectively enhanced, and the water in the salt slurry is reduced; in the third step, centrifugal dehydration treatment is carried out by adopting centrifuges with different quantities or different specifications according to different water contents in the salt slurry, so that the effluent treatment effect of the salt slurry can be effectively enhanced; inside the molybdenum dioxide nanoflower was embedded into graphite alkene in the strengthening membrane, formed porous light and heat composite hydrogel, can compound graphite oxide/polyvinyl alcohol composite fiber and light and heat composite hydrogel, light and heat conversion rate is high, can absorb the inside moisture of salt thick liquid fast, can effectively improve water evaporation efficiency simultaneously under the illumination effect, and then effectively reduce the moisture content in the wet salt.

Description

Salt production process capable of controlling solid-liquid ratio of salt product
Technical Field
The invention relates to the technical field of nitrate production processes, in particular to a salt production process with a salt product solid-liquid ratio controlled.
Background
The nitrate is white powdery solid, generally refers to sodium chloride containing impurities such as sodium nitrate, sodium nitrite and the like, and the sodium nitrate and the sodium nitrite can play a role in corrosion prevention. In industrial production, nitrate refers to sodium sulfate and sodium chloride, anhydrous sodium sulfate (anhydrous sodium sulfate) is simply referred to as nitrate, and sodium chloride is simply referred to as salt. The existing salt making process mainly comprises the following steps: evaporating the salt water in an evaporation system, crystallizing after evaporation to form salt slurry, centrifuging the salt slurry through a centrifugal drying system, and then throwing away water to form the scattered-moisture salt; the wet-dispersed salt can be further dried to form dry-dispersed salt, and the dry-dispersed salt can be directly packaged.
In the existing salt discharging process of nitrate products, the moisture of wet salt is high for a long time, the moisture of the salt products is controlled to be 3.5-4.0% all the time, and is up to 4.2% in serious cases, so that the subsequent processing is inconvenient.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a salt production process with controlled solid-to-liquid ratio.
A salt production process for controlling the solid-liquid ratio of a salt product comprises the following specific salt production steps:
the method comprises the following steps: introducing the brine into an evaporation tank for evaporation treatment, and crystallizing after evaporation to prepare salt slurry;
step two: spraying a reinforced film on the inner wall of the centrifuge, and additionally arranging a fluorescent lamp inside the centrifuge;
step three: and D, performing centrifugal control treatment by adopting different centrifuges according to the solid-liquid ratio of the salt slurry prepared in the step one to obtain wet salt.
Further, in the step one, the temperature of the evaporation tank is 95-115 ℃, and the pressure is 0.79-0.85 bar; in the second step, the illumination intensity is 3.6kW/m2。
Furthermore, in the third step, when the solid-to-liquid ratio in the salt slurry is more than or equal to 35%, two centrifuges, namely p85 and p60, are used for controlling salt; when the solid-liquid ratio in the salt slurry is 30-35%, controlling salt discharge by using a p 85; when the solid-liquid ratio in the salt slurry is 25-30%, controlling to prepare salt by using a p60 centrifuge; and stopping salt discharge when the solid-liquid ratio in the salt slurry is less than or equal to 25 percent.
Further, the reinforcing film in the second step comprises the following components in percentage by weight: 51.50-52.60% of water-based UV resin, 8.30-9.10% of photoinitiator, 21.30-22.10% of reactive diluent, and the balance of composite filler;
the composite filler comprises the following components in percentage by weight: 21.30-22.50% of graphene, 39.50-40.20% of polyvinyl alcohol, 21.60-22.80% of thiourea, 10.50-11.30% of ammonium paramolybdate, and the balance of carbon nano material graphite oxide;
the preparation process of the reinforced film comprises the following specific preparation steps:
s1: weighing the water-based UV resin, the photoinitiator, the active diluent and graphene, polyvinyl alcohol, thiourea, ammonium paramolybdate and carbon nano material graphite oxide in the composite filler in parts by weight;
s2: adding graphene, thiourea and ammonium paramolybdate of the composite filler in the step S1 into deionized water, and then carrying out ultrasonic treatment for 30-40 min to obtain a mixed solution A;
s3: adding the polyvinyl alcohol and the carbon nano material graphite oxide in the step S1 into the mixed liquid A prepared in the step S2, and performing double-frequency ultrasonic treatment for 20-30 min to obtain a mixed material B;
s4: carrying out electrostatic spinning treatment on the mixture B to obtain composite fibers;
s5: mixing the water-based UV resin, the photoinitiator and the reactive diluent obtained in the step S1 with the composite fiber obtained in the step S4 to obtain a mixture C;
s6: and (5) spraying the mixture C in the step S5 in a centrifuge by a vacuum spraying method, wherein the mixture C forms a reinforcing film on the inner wall of the centrifuge.
Further, the reinforced film comprises the following components in percentage by weight: 51.50% of water-based UV resin, 8.30% of photoinitiator, 21.30% of reactive diluent and 18.90% of composite filler; the composite filler comprises the following components in percentage by weight: 21.30% of graphene, 39.50% of polyvinyl alcohol, 21.60% of thiourea, 10.50% of ammonium paramolybdate and 7.10% of carbon nano material graphite oxide.
Further, the reinforced film comprises the following components in percentage by weight: 52.60 percent of water-based UV resin, 9.10 percent of photoinitiator, 22.10 percent of reactive diluent and 16.20 percent of composite filler; the composite filler comprises the following components in percentage by weight: 22.50% of graphene, 40.20% of polyvinyl alcohol, 22.80% of thiourea, 11.30% of ammonium paramolybdate and 3.20% of carbon nano material graphite oxide.
Further, the reinforced film comprises the following components in percentage by weight: 52.05% of water-based UV resin, 8.70% of photoinitiator, 21.70% of reactive diluent and 17.55% of composite filler; the composite filler comprises the following components in percentage by weight: 21.90% of graphene, 39.85% of polyvinyl alcohol, 22.20% of thiourea, 10.90% of ammonium paramolybdate and 5.15% of carbon nano material graphite oxide.
Further, the reactive diluent is prepared by compounding one or more of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate and tripropylene glycol diacrylate.
Further, in step S2, the ultrasonic frequency is 25-29 Hz, and the ultrasonic power is 1300-1500W; in step S3, the frequency of the dual-frequency ultrasound is 30-36 KHz + 1.5-1.9 MHz, the dual-frequency ultrasound performs staggered work, the 30-36 KHz ultrasound works for 2-4 min each time, and the 1.5-1.9 MHz ultrasound works for 4-6 min each time; in step S4, in the electrostatic spinning process, the distance between the capillary nozzle of the injector and the grounded receiving device is 9-11 cm, and 13-15 KV high voltage is applied.
Further, in step S2, the ultrasonic frequency is 25Hz, and the ultrasonic power is 1300W; in step S3, the dual-frequency ultrasound frequency is 30KHz +1.5MHz, the dual-frequency ultrasound performs the interleaved operation, the 30KHz ultrasound operation is performed for 2min each time, and the 1.5MHz ultrasound operation is performed for 4min each time; in step S4, during electrospinning, the capillary nozzle of the syringe and the grounded receiving device were spaced 9cm apart, and a high voltage of 13KV was applied.
The invention has the technical effects and advantages that:
1. according to the high-dispersion modified salt-yielding process prepared by the raw material formula, in the step one, salt water is subjected to evaporation and crystallization treatment to prepare salt slurry; in the second step, a reinforcing film is sprayed on the inner wall of the centrifuge, a fluorescent lamp is additionally arranged, and the reinforcing film and the fluorescent lamp are matched with each other, so that the evaporation treatment effect on the water in the salt slurry can be effectively enhanced, and the water in the salt slurry is reduced; in the third step, centrifugal dehydration treatment is carried out by adopting centrifuges with different quantities or different specifications according to different water contents in the salt slurry, so that the effluent treatment effect of the salt slurry can be effectively enhanced; thiourea and ammonium paramolybdate in the reinforced membrane generate cavitation effect under ultrasonic treatment in deionized water to react to form molybdenum disulfide nanoflowers, and meanwhile, under the ultrasonic treatment, the molybdenum dioxide nanoflowers are embedded into graphene to form porous photo-thermal composite hydrogel; the polyvinyl alcohol, the carbon nano material graphite oxide and the photo-thermal composite hydrogel are uniformly mixed and then are subjected to electrostatic spinning treatment, so that graphite oxide/polyvinyl alcohol composite fibers can be formed, and meanwhile, the graphite oxide/polyvinyl alcohol composite fibers and the photo-thermal composite hydrogel are compounded, so that the water evaporation efficiency of the reinforced membrane can be further improved, the photo-thermal conversion rate is high, and the moisture content in wet salt is further reduced;
2. in the process of preparing the reinforced membrane, in step S2, adding graphene, thiourea and ammonium paramolybdate into deionized water for blending ultrasonic treatment, generating a cavitation effect in a blending system, and embedding molybdenum dioxide nanoflowers into graphene to form porous photo-thermal composite hydrogel; in step S3, the photo-thermal composite hydrogel is subjected to mixed dual-frequency ultrasonic treatment with polyvinyl alcohol and carbon nanomaterial graphite oxide to generate a cavitation effect in a blending system, and ultrasonic dispersion treatment is performed simultaneously to ensure that the carbon nanomaterial graphite oxide is fixed on polyvinyl alcohol fibers in situ to form graphite oxide/polyvinyl alcohol composite fibers; in step S4, the electrostatic spinning process is performed, so that the graphite oxide/polyvinyl alcohol composite fiber and the photothermal composite hydrogel can be effectively combined, and the stability and safety of the graphite oxide/polyvinyl alcohol composite fiber and the photothermal composite hydrogel can be ensured.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a salt production process for controlling the solid-liquid ratio of a salt product, which comprises the following specific salt production steps:
the method comprises the following steps: introducing the brine into an evaporation tank for evaporation treatment, and crystallizing after evaporation to prepare salt slurry;
step two: spraying a reinforced film on the inner wall of the centrifuge, and additionally arranging a fluorescent lamp inside the centrifuge;
step three: and D, performing centrifugal control treatment by adopting different centrifuges according to the solid-liquid ratio of the salt slurry prepared in the step one to obtain wet salt.
In the first step, the temperature of the evaporation tank is 95 ℃, and the pressure is 0.79 bar; in the second step, the illumination intensity is 3.6kW/m2。
In the third step, when the solid-to-liquid ratio in the salt slurry is more than or equal to 35 percent, controlling salt by using two centrifuges p85 and p 60; when the solid-liquid ratio in the salt slurry is 30-35%, controlling salt discharge by using a p 85; when the solid-liquid ratio in the salt slurry is 25-30%, controlling to prepare salt by using a p60 centrifuge; and stopping salt discharge when the solid-liquid ratio in the salt slurry is less than or equal to 25 percent.
The reinforced film in the second step comprises the following components in percentage by weight: 51.50% of water-based UV resin, 8.30% of photoinitiator, 21.30% of reactive diluent and 18.90% of composite filler; the composite filler comprises the following components in percentage by weight: 21.30% of graphene, 39.50% of polyvinyl alcohol, 21.60% of thiourea, 10.50% of ammonium paramolybdate and 7.10% of carbon nano material graphite oxide;
the preparation process of the reinforced film comprises the following specific preparation steps:
s1: weighing the water-based UV resin, the photoinitiator, the active diluent and graphene, polyvinyl alcohol, thiourea, ammonium paramolybdate and carbon nano material graphite oxide in the composite filler in parts by weight;
s2: adding the graphene, thiourea and ammonium paramolybdate of the composite filler in the step S1 into deionized water, and then carrying out ultrasonic treatment for 30min to obtain a mixed solution A;
s3: adding the polyvinyl alcohol and the carbon nano material graphite oxide in the step S1 into the mixed liquid A prepared in the step S2, and carrying out double-frequency ultrasonic treatment for 20min to obtain a mixed material B;
s4: carrying out electrostatic spinning treatment on the mixture B to obtain composite fibers;
s5: mixing the water-based UV resin, the photoinitiator and the reactive diluent obtained in the step S1 with the composite fiber obtained in the step S4 to obtain a mixture C;
s6: and (5) spraying the mixture C in the step S5 in a centrifuge by a vacuum spraying method, wherein the mixture C forms a reinforcing film on the inner wall of the centrifuge.
The active diluent is prepared by compounding one or more of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate and tripropylene glycol diacrylate.
In step S2, the ultrasonic frequency is 25Hz, and the ultrasonic power is 1300W; in step S3, the dual-frequency ultrasound frequency is 30KHz +1.5MHz, the dual-frequency ultrasound performs the interleaved operation, the 30KHz ultrasound operation is performed for 2min each time, and the 1.5MHz ultrasound operation is performed for 4min each time; in step S4, during electrospinning, the capillary nozzle of the syringe and the grounded receiving device were spaced 9cm apart, and a high voltage of 13KV was applied.
Example 2:
different from the embodiment 1, the reinforced film comprises the following components in percentage by weight: 52.60 percent of water-based UV resin, 9.10 percent of photoinitiator, 22.10 percent of reactive diluent and 16.20 percent of composite filler; the composite filler comprises the following components in percentage by weight: 22.50% of graphene, 40.20% of polyvinyl alcohol, 22.80% of thiourea, 11.30% of ammonium paramolybdate and 3.20% of carbon nano material graphite oxide.
Example 3:
unlike examples 1-2, the reinforced film comprises, in weight percent: 52.05% of water-based UV resin, 8.70% of photoinitiator, 21.70% of reactive diluent and 17.55% of composite filler; the composite filler comprises the following components in percentage by weight: 21.90% of graphene, 39.85% of polyvinyl alcohol, 22.20% of thiourea, 10.90% of ammonium paramolybdate and 5.15% of carbon nano material graphite oxide.
Taking the salt discharging process in the embodiments 1 to 3 and the salt discharging process of the first control group, the salt discharging process of the second control group, the salt discharging process of the third control group, the salt discharging process of the fourth control group and the salt discharging process of the fifth control group respectively, wherein the salt discharging process of the first control group is free of graphene compared with the embodiments; compared with the examples, the salt discharging process of the control group II has no polyvinyl alcohol in the water-based UV ink; compared with the example, the salt discharging process of the control group III has no thiourea in the water-based UV ink; the salt discharge process of control group four compared to the examples did not have ammonium paramolybdate in the aqueous UV ink; compared with the embodiment, the salt discharging process of the control group V does not contain the carbon nano material graphite oxide in the water-based UV ink; the prints prepared by the salt-yielding process in the three examples and the wet salt prepared by the salt-yielding process in the five control groups were tested in eight groups, with the experimental data for each 30 wet salt products being one group, and the test results are shown in table one:
table one:
Figure BDA0003228582640000061
as can be seen from table one, example 3 is a preferred embodiment of the present invention; in the first step, carrying out evaporative crystallization treatment on the brine to prepare salt slurry; in the second step, a reinforcing film is sprayed on the inner wall of the centrifuge, a fluorescent lamp is additionally arranged, and the reinforcing film and the fluorescent lamp are matched with each other, so that the evaporation treatment effect on the water in the salt slurry can be effectively enhanced, and the water in the salt slurry is reduced; in the third step, centrifugal dehydration treatment is carried out by adopting centrifuges with different quantities or different specifications according to different water contents in the salt slurry, so that the effluent treatment effect of the salt slurry can be effectively enhanced; thiourea and ammonium paramolybdate in the reinforced membrane are uniformly dispersed in deionized water, a cavitation effect is generated under 25Hz ultrasonic treatment, the thiourea and ammonium paramolybdate can be promoted to react to form molybdenum disulfide nanoflowers under the cavitation effect, meanwhile, under the ultrasonic treatment, the molybdenum dioxide nanoflowers are embedded into graphene to form porous photo-thermal composite hydrogel, the photo-thermal conversion rate is high, moisture in salt slurry can be rapidly absorbed, meanwhile, the water evaporation efficiency can be effectively improved under the action of illumination, and further, the moisture content in wet salt is effectively reduced; the polyvinyl alcohol, the carbon nano material graphite oxide and the photo-thermal composite hydrogel are uniformly mixed and then subjected to electrostatic spinning treatment, the carbon nano material graphite oxide can be fixed on polyvinyl alcohol fibers in situ to form graphite oxide/polyvinyl alcohol composite fibers, and meanwhile, the graphite oxide/polyvinyl alcohol composite fibers and the photo-thermal composite hydrogel are compounded, so that the efficiency of the strengthening film on water evaporation can be further improved, the photo-thermal conversion rate is high, and the moisture content in wet salt is further reduced.
Example 4:
the invention provides a salt production process for controlling the solid-liquid ratio of a salt product, which comprises the following specific salt production steps:
the method comprises the following steps: introducing the brine into an evaporation tank for evaporation treatment, and crystallizing after evaporation to prepare salt slurry;
step two: spraying a reinforced film on the inner wall of the centrifuge, and additionally arranging a fluorescent lamp inside the centrifuge;
step three: and D, performing centrifugal control treatment by adopting different centrifuges according to the solid-liquid ratio of the salt slurry prepared in the step one to obtain wet salt.
In the first step, the temperature of the evaporation tank is 105 ℃, and the pressure is 0.82 bar; in the second step, the illumination intensity is 3.6kW/m2。
In the third step, when the solid-to-liquid ratio in the salt slurry is more than or equal to 35 percent, controlling salt by using two centrifuges p85 and p 60; when the solid-liquid ratio in the salt slurry is 30-35%, controlling salt discharge by using a p 85; when the solid-liquid ratio in the salt slurry is 25-30%, controlling to prepare salt by using a p60 centrifuge; and stopping salt discharge when the solid-liquid ratio in the salt slurry is less than or equal to 25 percent.
The reinforced film in the second step comprises the following components in percentage by weight: 51.50% of water-based UV resin, 8.30% of photoinitiator, 21.30% of reactive diluent and 18.90% of composite filler; the composite filler comprises the following components in percentage by weight: 21.30% of graphene, 39.50% of polyvinyl alcohol, 21.60% of thiourea, 10.50% of ammonium paramolybdate and 7.10% of carbon nano material graphite oxide;
the preparation process of the reinforced film comprises the following specific preparation steps:
s1: weighing the water-based UV resin, the photoinitiator, the active diluent and graphene, polyvinyl alcohol, thiourea, ammonium paramolybdate and carbon nano material graphite oxide in the composite filler in parts by weight;
s2: adding the graphene, thiourea and ammonium paramolybdate of the composite filler in the step S1 into deionized water, and then carrying out ultrasonic treatment for 35min to obtain a mixed solution A;
s3: adding the polyvinyl alcohol and the carbon nano material graphite oxide in the step S1 into the mixed liquid A prepared in the step S2, and carrying out double-frequency ultrasonic treatment for 25min to obtain a mixed material B;
s4: carrying out electrostatic spinning treatment on the mixture B to obtain composite fibers;
s5: mixing the water-based UV resin, the photoinitiator and the reactive diluent obtained in the step S1 with the composite fiber obtained in the step S4 to obtain a mixture C;
s6: and (5) spraying the mixture C in the step S5 in a centrifuge by a vacuum spraying method, wherein the mixture C forms a reinforcing film on the inner wall of the centrifuge.
The active diluent is prepared by compounding one or more of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate and tripropylene glycol diacrylate.
In step S2, the ultrasonic frequency is 25Hz, and the ultrasonic power is 1300W; in step S3, the dual-frequency ultrasound frequency is 30KHz +1.5MHz, the dual-frequency ultrasound performs the interleaved operation, the 30KHz ultrasound operation is performed for 2min each time, and the 1.5MHz ultrasound operation is performed for 4min each time; in step S4, during electrospinning, the capillary nozzle of the syringe and the grounded receiving device were spaced 9cm apart, and a high voltage of 13KV was applied.
Example 5:
unlike embodiment 4, in step S2, the ultrasonic frequency is 29Hz, and the ultrasonic power is 1500W; in step S3, the dual-frequency ultrasonic frequency is 36KHz +1.9MHz, the dual-frequency ultrasonic performs the staggered work, the 36KHz ultrasonic work is 4min each time, and the 1.9MHz ultrasonic work is 6min each time; in step S4, during the electrospinning process, the capillary nozzle of the syringe and the grounded receiving device were spaced by 11cm, and a high voltage of 15KV was applied.
Example 6:
unlike in each of examples 4 to 5, in step S2, the ultrasonic frequency was 27Hz, and the ultrasonic power was 1400W; in step S3, the dual-frequency ultrasound frequency is 33KHz +1.7MHz, the dual-frequency ultrasound performs staggered operation, 3min for 33KHz ultrasound operation each time, and 5min for 1.7MHz ultrasound operation each time; in step S4, during the electrospinning process, the capillary nozzle of the syringe and the grounded receiving device were spaced apart by 10cm, and a high voltage of 14KV was applied.
Taking the salt-removing process of the salt-removing process prepared in the above examples 4-6 and the salt-removing process of the control group six, the salt-removing process of the control group seven and the salt-removing process of the control group eight respectively, the salt-removing process of the control group six has no operation in step S2 compared with the examples, the salt-removing process of the control group seven has no operation in step S3 compared with the examples, the salt-removing process of the control group eight has no operation in step S4 compared with the examples, the salt-removing process prepared in the three examples and the salt-removing process of the three control groups are tested by six groups respectively, each 30 wet salt product experimental data is one group, and the test results are shown in table two:
table two:
Figure BDA0003228582640000081
as can be seen from table two, example 6 is a preferred embodiment of the present invention; step S2, adding the graphene, thiourea and ammonium paramolybdate into deionized water to perform blending 27Hz ultrasonic treatment, generating a cavitation effect in a blending system, ensuring that the thiourea and the ammonium paramolybdate react quickly to generate molybdenum dioxide nanoflowers, and embedding the molybdenum dioxide nanoflowers into the graphene to form the porous photo-thermal composite hydrogel; in step S3, the photo-thermal composite hydrogel is mixed with polyvinyl alcohol and carbon nanomaterial graphite oxide to perform 33KHz +1.7MHz dual-frequency ultrasonic treatment, a cavitation effect is generated in a blending system, and ultrasonic dispersion treatment is performed at the same time, so that the carbon nanomaterial graphite oxide can be ensured to be fixed on polyvinyl alcohol fibers in situ to form graphite oxide/polyvinyl alcohol composite fibers, and the graphite oxide/polyvinyl alcohol composite fibers and the photo-thermal composite hydrogel are blended; in step S4, the electrostatic spinning process is performed, so that the graphite oxide/polyvinyl alcohol composite fiber and the photothermal composite hydrogel can be effectively combined, and the stability and safety of the graphite oxide/polyvinyl alcohol composite fiber and the photothermal composite hydrogel can be ensured.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A salt production process capable of controlling the solid-liquid ratio of a salt product is characterized in that: the salt discharging steps are as follows:
the method comprises the following steps: introducing the brine into an evaporation tank for evaporation treatment, and crystallizing after evaporation to prepare salt slurry;
step two: spraying a reinforced film on the inner wall of the centrifuge, and additionally arranging a fluorescent lamp inside the centrifuge;
step three: and D, performing centrifugal control treatment by adopting different centrifuges according to the solid-liquid ratio of the salt slurry prepared in the step one to obtain wet salt.
2. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 1, wherein: in the first step, the temperature of the evaporation tank is 95-115 ℃, and the pressure is 0.79-0.85 bar; in the second step, the illumination intensity is 3.6kW/m2。
3. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 1, wherein: in the third step, when the solid-to-liquid ratio in the salt slurry is more than or equal to 35 percent, controlling salt by using two centrifuges p85 and p 60; when the solid-liquid ratio in the salt slurry is 30-35%, controlling salt discharge by using a p 85; when the solid-liquid ratio in the salt slurry is 25-30%, controlling to prepare salt by using a p60 centrifuge; and stopping salt discharge when the solid-liquid ratio in the salt slurry is less than or equal to 25 percent.
4. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 1, wherein: the reinforced film in the second step comprises the following components in percentage by weight: 51.50-52.60% of water-based UV resin, 8.30-9.10% of photoinitiator, 21.30-22.10% of reactive diluent, and the balance of composite filler;
the composite filler comprises the following components in percentage by weight: 21.30-22.50% of graphene, 39.50-40.20% of polyvinyl alcohol, 21.60-22.80% of thiourea, 10.50-11.30% of ammonium paramolybdate, and the balance of carbon nano material graphite oxide;
the preparation process of the reinforced film comprises the following specific preparation steps:
s1: weighing the water-based UV resin, the photoinitiator, the active diluent and graphene, polyvinyl alcohol, thiourea, ammonium paramolybdate and carbon nano material graphite oxide in the composite filler in parts by weight;
s2: adding graphene, thiourea and ammonium paramolybdate of the composite filler in the step S1 into deionized water, and then carrying out ultrasonic treatment for 30-40 min to obtain a mixed solution A;
s3: adding the polyvinyl alcohol and the carbon nano material graphite oxide in the step S1 into the mixed liquid A prepared in the step S2, and performing double-frequency ultrasonic treatment for 20-30 min to obtain a mixed material B;
s4: carrying out electrostatic spinning treatment on the mixture B to obtain composite fibers;
s5: mixing the water-based UV resin, the photoinitiator and the reactive diluent obtained in the step S1 with the composite fiber obtained in the step S4 to obtain a mixture C;
s6: and (5) spraying the mixture C in the step S5 in a centrifuge by a vacuum spraying method, wherein the mixture C forms a reinforcing film on the inner wall of the centrifuge.
5. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 4, wherein: the reinforced film comprises the following components in percentage by weight: 51.50% of water-based UV resin, 8.30% of photoinitiator, 21.30% of reactive diluent and 18.90% of composite filler; the composite filler comprises the following components in percentage by weight: 21.30% of graphene, 39.50% of polyvinyl alcohol, 21.60% of thiourea, 10.50% of ammonium paramolybdate and 7.10% of carbon nano material graphite oxide.
6. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 4, wherein: the reinforced film comprises the following components in percentage by weight: 52.60 percent of water-based UV resin, 9.10 percent of photoinitiator, 22.10 percent of reactive diluent and 16.20 percent of composite filler; the composite filler comprises the following components in percentage by weight: 22.50% of graphene, 40.20% of polyvinyl alcohol, 22.80% of thiourea, 11.30% of ammonium paramolybdate and 3.20% of carbon nano material graphite oxide.
7. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 4, wherein: the reinforced film comprises the following components in percentage by weight: 52.05% of water-based UV resin, 8.70% of photoinitiator, 21.70% of reactive diluent and 17.55% of composite filler; the composite filler comprises the following components in percentage by weight: 21.90% of graphene, 39.85% of polyvinyl alcohol, 22.20% of thiourea, 10.90% of ammonium paramolybdate and 5.15% of carbon nano material graphite oxide.
8. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 4, wherein: the active diluent is prepared by compounding one or more of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate and tripropylene glycol diacrylate.
9. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 4, wherein: in step S2, the ultrasonic frequency is 25-29 Hz, and the ultrasonic power is 1300-1500W; in step S3, the frequency of the dual-frequency ultrasound is 30-36 KHz + 1.5-1.9 MHz, the dual-frequency ultrasound performs staggered work, the 30-36 KHz ultrasound works for 2-4 min each time, and the 1.5-1.9 MHz ultrasound works for 4-6 min each time; in step S4, in the electrostatic spinning process, the distance between the capillary nozzle of the injector and the grounded receiving device is 9-11 cm, and 13-15 KV high voltage is applied.
10. The salt production process for controlling the solid-to-liquid ratio of the salt product according to claim 9, wherein: in step S2, the ultrasonic frequency is 25Hz, and the ultrasonic power is 1300W; in step S3, the dual-frequency ultrasound frequency is 30KHz +1.5MHz, the dual-frequency ultrasound performs the interleaved operation, the 30KHz ultrasound operation is performed for 2min each time, and the 1.5MHz ultrasound operation is performed for 4min each time; in step S4, during electrospinning, the capillary nozzle of the syringe and the grounded receiving device were spaced 9cm apart, and a high voltage of 13KV was applied.
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