Ethylene sulfate concentrating and drying device

Abstract

The utility model discloses an ethylene sulfate concentrating and drying device, and relates to the field of concentrating and drying devices. The ethylene sulfate concentrating and drying device comprises an ethylene sulfate crude product storage unit; the ethylene sulfate crude product storage unit is used for storing an ethylene sulfate crude product; the dehydration unit is connected with the ethylene sulfate crude product storage unit and is used for dehydrating the ethylene sulfate crude product conveyed from the ethylene sulfate crude product storage unit to obtain a dehydrated ethylene sulfate crude product; the concentration unit is connected with the dehydration unit and is used for concentrating the dehydrated ethylene sulfate crude product to obtain a mixed solution in which ethylene sulfate crystals are separated out; and the drying unit is connected with the concentration unit and is used for carrying out solid-liquid separation, washing and drying on the mixed solution in which the ethylene sulfate crystals are separated out to obtain the ethylene sulfate crystals. The ethylene sulfate concentrating and drying device disclosed by the utility model is beneficial to improving the yield of ethylene sulfate.

Description

Technical Field

[0001] The utility model relates to the field of concentration and drying devices, in particular to a vinyl sulfate concentration and drying device. Background Art

[0002] DTD is an excellent electrolyte additive. It can inhibit the decrease of initial capacity of lithium battery, increase initial discharge capacity, reduce high temperature expansion, and improve battery charge and discharge performance and cycle times by improving the structure of "solid electrolyte interface film" of electrolyte. With the continuous promotion of lithium battery application, the demand for DTD is also increasing.

[0003] Currently, the synthesis of vinyl sulfate usually includes the following three steps:

[0004] 1. Vinyl sulfite is obtained by reacting thionyl chloride with ethylene glycol;

[0005] 2. Put vinyl sulfite, catalyst and dichloromethane into a reaction kettle, slowly add sodium hypochlorite solution to react and obtain crude vinyl sulfate;

[0006] 3. The crude vinyl sulfate is washed with water, concentrated and dried in sequence to obtain the finished vinyl sulfate.

[0007] Among them, concentration and drying is one of the key steps in the purification of vinyl sulfate.

[0008] The concentration and drying device is usually composed of a concentration unit and a drying unit. Vinyl sulfate is crystallized by concentration, and then the crystals of vinyl sulfate are dried to purify the vinyl sulfate. However, this concentration and drying method has the problem of low yield of vinyl sulfate crystals. Utility Model Content

[0009] In order to improve the problem of low vinyl sulfate crystal yield in the concentration and drying method in the related art, the present application provides a vinyl sulfate concentration and drying device.

[0010] A vinyl sulfate concentration and drying device of the present application adopts the following technical solution:

[0011] A vinyl sulfate concentration and drying device, comprising:

[0012] Crude vinyl sulfate storage unit: The crude vinyl sulfate storage unit is used to store crude vinyl sulfate;

[0013] Dehydration unit: the dehydration unit is connected to the crude vinyl sulfate storage unit, and dehydrates the crude vinyl sulfate delivered from the crude vinyl sulfate storage unit to obtain dehydrated crude vinyl sulfate;

[0014] Concentration unit: the concentration unit is connected to the dehydration unit and concentrates the dehydrated vinyl sulfate crude product to obtain a mixed solution with precipitated vinyl sulfate crystals;

[0015] Drying unit: The drying unit is connected to the concentrating unit and performs solid-liquid separation, washing and drying on the mixed liquid with precipitated vinyl sulfate crystals to obtain vinyl sulfate crystals.

[0016] In the present application, a dehydration unit is added before the concentration unit, and the water content in the crude vinyl sulfate product is reduced to below 50 ppm by the dehydration unit, and then the dehydrated crude vinyl sulfate product is transported to the concentration unit for concentration and crystallization to obtain a mixed solution with precipitated vinyl sulfate crystals; finally, the mixed solution with precipitated vinyl sulfate crystals is sent to a drying unit for solid-liquid separation, and then the solid is washed and dried to obtain vinyl sulfate crystals. Among them, after removing the water content in the crude vinyl sulfate product, the problem of low yield caused by hydrolysis of vinyl sulfate can be prevented, which is conducive to improving the yield of vinyl sulfate.

[0017] The crude vinyl sulfate storage unit comprises:

[0018] DTD crude product tank: The DTD crude product tank is used to store crude vinyl sulfate;

[0019] Chilled brine channel: The chilled brine channel is arranged on the outer peripheral side of the DTD crude product tank body, the feed port of the chilled brine channel is connected to a chilled brine water inlet pipe, the chilled brine water inlet pipe is connected to a chilled brine valve that controls the entry of chilled brine into the chilled brine channel, and the discharge port of the chilled brine channel is connected to a chilled brine return pipe.

[0020] In the present application, the introduction of frozen brine into the frozen brine channel can keep the crude vinyl sulfate at a low temperature, which is beneficial to reducing the loss of vinyl sulfate and promoting the increase in the yield of vinyl sulfate.

[0021] Optionally, the dehydration unit includes a circulation pump and a molecular sieve filtration unit, and the circulation pump is

[0022] The feed end is connected to the vinyl sulfate crude product storage unit, and the discharge end of the circulation pump is connected to the molecular sieve filtration unit; the molecular sieve filtration unit includes a plurality of molecular sieve filters connected in series.

[0023] In the present application, the dehydration unit includes a plurality of molecular sieve filters connected in series, which is beneficial to improving the dehydration rate of the crude vinyl sulfate product and effectively reducing the water content in the crude vinyl sulfate product.

[0024] Optionally, each of the molecular sieve filters is provided with a spare molecular sieve filter in parallel.

[0025] In the present application, each molecular sieve filter is connected in parallel with a spare molecular sieve filter. When the molecular sieve filter is in an activated state, the crude vinyl sulfate can be dehydrated by the spare molecular sieve filter connected in parallel with it to ensure the continuous production of vinyl sulfate.

[0026] Optionally, the molecular sieve filtration unit includes a desorption activation component, and the desorption activation component is connected to the molecular sieve filter and the spare molecular sieve filter; wherein the desorption activation component includes:

[0027] a nitrogen source, the nitrogen source providing nitrogen;

[0028] A nitrogen heater, connected to the nitrogen source, for heating the nitrogen;

[0029] A nitrogen delivery pipe, wherein the air inlet of the nitrogen delivery pipe is connected to the exhaust port of the nitrogen heater.

[0030] Then, a plurality of branches are arranged at the discharge end of the nitrogen delivery pipe, and each branch is connected to one of the molecular sieve filters or one of the spare molecular sieve filters.

[0031] In the present application, the molecular sieve filtration unit also includes a desorption activation component, and the function of the desorption activation component is to desorb and activate the molecular sieve filler in the molecular sieve filter. The specific operation is: when the filler in the molecular sieve filter is desorbed, the nitrogen heater does not work first, and the normal temperature nitrogen is directly passed into the molecular sieve filter, and the substances remaining in the molecular sieve filter are blown off by the normal temperature nitrogen, and then the nitrogen heater is started to heat the nitrogen, and the molecular sieve filler in the molecular sieve filter is activated by the hot nitrogen. Among them, the setting of the desorption activation component is conducive to enabling the molecular sieve filter to maintain a good dehydration effect.

[0032] Optionally, the dehydration unit also includes a precision membrane filter, the feed end of the precision membrane filter is connected to the discharge end of the molecular sieve filtration unit, the discharge end of the precision membrane filter is connected to two branches, one of the branches of the discharge end of the precision membrane filter is connected to the crude vinyl sulfate storage unit, and the other branch of the discharge end of the precision membrane filter is connected to the concentration unit.

[0033] The present application arranges a precision membrane filter after the molecular sieve filtration unit. The precision membrane filter can prevent the dehydrated vinyl sulfate crude product from carrying the fine fillers in the molecular sieve filtration unit to the concentration unit, which is beneficial to improving the purity of the vinyl sulfate.

[0034] Optionally, the concentration unit includes a concentration kettle, and the concentration kettle includes:

[0035] Concentration kettle body: the concentration kettle body is connected to the outlet of the precision membrane filter, and a first stirring structure is provided in the concentration kettle body;

[0036] Medium channel: The medium channel is arranged on the outer peripheral side of the concentrating kettle body, and the feed port of the medium channel is connected to a chilled water feed pipe and a first hot ethylene glycol feed pipe. The chilled water feed pipe is provided with a chilled water valve for controlling the entry of chilled water into the medium channel, and the first hot ethylene glycol feed pipe is connected to a first hot ethylene glycol valve for controlling the entry of hot ethylene glycol into the medium channel.

[0037] In the present application, during concentration, the first hot ethylene glycol valve is first opened, hot ethylene glycol is circulated into the medium channel, and the first stirring structure is started to start stirring. The material in the concentration kettle body changes from transparent to yellow and then to turbid. After white vinyl sulfate is attached to the wall of the concentration kettle body, the first hot ethylene glycol valve is closed, the chilled water valve is opened, and chilled water is circulated into the medium channel. At the same time, the first stirring structure keeps stirring until the concentration kettle body is cooled to achieve the concentration and crystallization operation of vinyl sulfate.

[0038] Optionally, the drying unit includes a drying kettle, a mother liquid storage tank, a washing liquid storage tank, a vacuum system and a DTD product kettle, and the drying kettle includes:

[0039] A drying kettle body, wherein the drying kettle body is connected to the concentrating kettle body, a second stirring structure is arranged in the drying kettle body, and a filtering structure is arranged on the side wall of the drying kettle body;

[0040] A heat medium channel, wherein the heat medium channel is arranged on the outer peripheral side of the drying kettle body, and a feed port of the heat medium channel is connected to a second hot ethylene glycol feed pipe, and the second hot ethylene glycol feed pipe is provided with a second hot ethylene glycol valve for controlling hot ethylene glycol to enter the heat medium channel;

[0041] The mother liquid storage tank, the washing liquid storage tank, the vacuum system and the DTD product kettle are all connected to the drying kettle body.

[0042] In the present application, the drying unit includes a pre-treatment of solid-liquid separation and washing, which is beneficial to improving the purity of vinyl sulfate crystals. Among them, solid-liquid separation is achieved by a filtering structure on the side wall of the drying kettle body, and a mother liquor storage tank is connected to the drying kettle body, and is used to receive the filtrate separated from the concentration kettle body and enters the drying kettle body. The washing liquid storage tank is connected to the drying kettle body, and is used to receive a dichloromethane washing liquid for further purification of the crystallized vinyl sulfate. The washed vinyl sulfate is retained in the drying kettle body, and the drying kettle body is heated by introducing hot ethylene glycol into the heat medium channel, and the vacuum system is started at the same time to take the solvent out of the drying kettle body, so that the purification and drying of vinyl sulfate can be achieved, and the dried vinyl sulfate crystals enter the DTD product kettle.

[0043] In summary, this application at least includes the following beneficial technical effects:

[0044] (1) In the present application, a dehydration unit is added before the concentration unit, and the water content in the crude vinyl sulfate product is reduced to below 50 ppm by the dehydration unit, and then the dehydrated crude vinyl sulfate product is transported to the concentration unit for concentration and crystallization to obtain a mixed solution with precipitated vinyl sulfate crystals; finally, the mixed solution with precipitated vinyl sulfate crystals is sent to the drying unit for solid-liquid separation, and then the solid is washed and dried to obtain vinyl sulfate crystals. Among them, after removing the water content in the crude vinyl sulfate product, the problem of low yield caused by hydrolysis of vinyl sulfate can be prevented, which is conducive to improving the yield of vinyl sulfate.

[0045] (2) In the present application, the dehydration unit includes a plurality of molecular sieve filters connected in series, each of which is provided with a spare molecular sieve filter in parallel, which can effectively reduce the water content in the crude vinyl sulfate product while ensuring the continuous production of vinyl sulfate. In addition, the molecular sieve filtration unit also includes a desorption activation component, and the provision of the desorption activation component is conducive to enabling the molecular sieve filter to maintain a good dehydration effect.

[0046] (3) In the present application, the drying unit includes a pre-treatment of solid-liquid separation and washing, which is beneficial to improving the purity of vinyl sulfate crystals. Among them, solid-liquid separation is achieved through the filtering structure on the side wall of the drying kettle body. The mother liquor storage tank is connected to the drying kettle body and is used to receive the filtrate separated from the concentration kettle body and enters the drying kettle body. The washing liquid storage tank is connected to the drying kettle body and is used to receive the dichloromethane washing liquid for further purification of the crystallized vinyl sulfate. The washed vinyl sulfate is retained in the drying kettle body. The drying kettle body is heated by introducing hot ethylene glycol into the heat medium channel. At the same time, the vacuum system is started to take the solvent out of the drying kettle body, thereby achieving the purification and drying of vinyl sulfate. The dried vinyl sulfate crystals enter the DTD product kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of a vinyl sulfate concentration and drying device according to an embodiment of the present application.

[0048] Figure 2 It is a schematic diagram of a crude vinyl sulfate storage unit according to an embodiment of the present application.

[0049] Figure 3 It is a schematic diagram of a dehydration unit according to an embodiment of the present application.

[0050] Figure 4 Schematic diagram of a concentration unit according to an embodiment of the present application.

[0051] Figure 5 Schematic diagram of a drying unit according to an embodiment of the present application.

[0052] Description of reference numerals:

[0053] 1. Vinyl sulfate crude product storage unit; 11. DTD crude product tank body; 12. Chilled brine channel; 2. Dehydration unit; 21. Circulation pump; 22. Molecular sieve filter; 23. Spare molecular sieve filter; 24. Desorption activation assembly; 241. Nitrogen source; 242. Nitrogen heater; 243. Nitrogen delivery pipe; 25. Precision membrane filter; 3. Concentration unit; 31. Concentration kettle body; 32. First stirring structure; 33. Medium channel; 4. Drying unit; 41. Drying kettle body; 411. Filtration structure; 42. Second stirring structure; 43. Hot medium channel; 44. Mother liquor storage tank; 45. Washing liquid storage tank; 46. Vacuum system; 47. DTD product kettle. DETAILED DESCRIPTION

[0054] The following is combined with Figure 1-5 Further explanation of this application.

[0055] Reference Figure 1 The present application discloses a vinyl sulfate concentration and drying device, comprising a vinyl sulfate crude product storage unit 1, a dehydration unit 2, a concentration unit 3 and a drying unit 4 which are sequentially arranged along the material transmission direction. The dehydration unit 2 dehydrates the vinyl sulfate crude product transported from the vinyl sulfate crude product storage unit 1 to obtain dehydrated vinyl sulfate crude product. The concentration unit 3 also concentrates the dehydrated vinyl sulfate crude product to obtain a mixed solution with vinyl sulfate crystals precipitated. The drying unit 4 dries the mixed solution with vinyl sulfate crystals precipitated to obtain vinyl sulfate crystals.

[0056] Reference Figure 2 The crude vinyl sulfate storage unit 1 includes a crude DTD tank 11 and a refrigerated brine channel 12 .

[0057] The crude DTD product tank 11 is used to store the crude vinyl sulfate product, and the frozen brine channel 12 is arranged on the outer peripheral side of the crude DTD product tank 11, and the feed port of the frozen brine channel 12 is connected to a frozen brine water inlet pipe, and the discharge port of the frozen brine channel 12 is connected to a frozen brine water return pipe. In addition, the frozen brine water inlet pipe is connected to a frozen brine valve for controlling the entry of frozen brine into the frozen brine channel 12. The introduction of frozen brine into the frozen brine channel 12 can keep the crude vinyl sulfate product at a low temperature, which is beneficial to reducing the loss of vinyl sulfate and has a promoting effect on increasing the yield of vinyl sulfate.

[0058] Reference Figure 3 The dehydration unit 2 includes a circulation pump 21, a molecular sieve filtration unit and a precision membrane filter 25. The circulation pump 21 is used to transport the crude vinyl sulfate, and the molecular sieve filtration unit is used to dehydrate the crude vinyl sulfate. The precision membrane filter 25 is used to filter the crude vinyl sulfate to prevent the crude vinyl sulfate from carrying the filler in the molecular sieve filtration unit into the concentration unit 3.

[0059] Reference Figure 1-3 The feed end of the circulating pump 21 is connected to the bottom of the DTD crude product tank 11 through a pipeline, and the discharge end of the circulating pump 21 is connected to the molecular sieve filtration unit through a pipeline, so as to pump the material in the crude vinyl sulfate storage unit 1 to the molecular sieve filtration unit. In order to ensure continuous production operation, at least two circulating pumps 21 are provided. When one of them is in maintenance state, the crude vinyl sulfate can be circulated and dehydrated by the other circulating pump 21.

[0060] Reference Figure 3 The molecular sieve filtration unit includes a molecular sieve filter 22 and a desorption activation assembly 24. Specifically, a plurality of molecular sieve filters 22 are provided, and the plurality of molecular sieve filters 22 are arranged in series, which is beneficial to improving the dehydration rate of the crude vinyl sulfate product and has an improving effect on improving the purity of the subsequent vinyl sulfate crystals.

[0061] The desorption activation assembly 24 includes a nitrogen source 241, a nitrogen heater 242 and a nitrogen delivery pipe 243. The nitrogen source 241 is used to provide nitrogen, the air inlet of the nitrogen heater 242 is connected to the exhaust port of the nitrogen source 241, and the exhaust port of the nitrogen heater 242 is connected to the air inlet of the nitrogen delivery pipe 243. In this embodiment, the nitrogen delivery pipe 243 is provided with a plurality of branches, each branch corresponds to a molecular sieve filter 22, and the air outlet of each branch of the nitrogen delivery pipe 243 is connected to the bottom of the molecular sieve filter 22, and each branch of the nitrogen delivery pipe 243 is provided with a nitrogen valve, and the flow direction of the nitrogen is controlled by opening and closing the nitrogen valve. When the filler in the molecular sieve filter 22 is desorbed, the nitrogen heater 242 does not work first, and nitrogen at room temperature is directly introduced into the molecular sieve filter 22 to blow off the substances remaining in the molecular sieve filter 22 with the nitrogen at room temperature. Then, the nitrogen heater 242 is started again to heat the nitrogen, and the molecular sieve filler in the molecular sieve filter 22 is activated by the hot nitrogen, so that the molecular sieve filter 22 can maintain a good dehydration effect.

[0062] In order to ensure that the dehydration operation can be carried out continuously, in this embodiment, each molecular sieve filter 22 is connected in parallel with a spare molecular sieve filter 23. When multiple molecular sieve filters 22 connected in series are activated, the crude vinyl sulfate can be dehydrated through the multiple spare molecular sieve filters 23. In addition, the nitrogen delivery pipe 243 is also provided with branches connected to the bottom of the spare molecular sieve filter 23 corresponding to the multiple spare molecular sieve filters 23, and the branch connected to the bottom of the spare molecular sieve filter 23 is also provided with a nitrogen valve.

[0063] The precision membrane filter 25 is arranged after the molecular sieve filtration unit, and is used to prevent the dehydrated vinyl sulfate crude product from carrying the fine fillers in the molecular sieve filtration unit to the concentration unit 3, which is beneficial to improve the purity of vinyl sulfate. Among them, the feed end of the precision membrane filter 25 is connected to the discharge end of the molecular sieve filtration unit, and the discharge end of the precision membrane filter 25 is connected to two branches, one of which is connected to the DTD crude product tank 11, and its function is to circulate and dehydrate the vinyl sulfate crude product to control the water content of the vinyl sulfate crude product entering the concentration unit 3; the other branch of the discharge end of the precision membrane filter 25 is connected to the concentration unit 3, and is used to transport the vinyl sulfate crude product with qualified water content to the concentration unit 3 for concentration and crystallization.

[0064] Reference Figure 4The concentration unit 3 includes a concentration kettle, which includes a concentration kettle body 31, a first stirring structure 32 and a medium channel 33. The concentration kettle body 31 is connected to the outlet of the precision membrane filter 25, so that the crude dehydrated vinyl sulfate product from the precision membrane filter 25 enters the concentration kettle body 31. The first stirring structure 32 is arranged in the concentration kettle body 31, and is used to stir the materials in the concentration kettle body 31. The medium channel 33 is arranged on the outer peripheral side of the concentration kettle body 31, and the feed port of the medium channel 33 is connected to a chilled water feed pipe and a first hot ethylene glycol feed pipe. The chilled water feed pipe is provided with a chilled water valve for controlling the chilled water to enter the medium channel 33, and the first hot ethylene glycol feed pipe is connected to a first hot ethylene glycol valve for controlling the hot ethylene glycol to enter the medium channel 33. During concentration, the first hot ethylene glycol valve is opened first, and hot ethylene glycol is circulated into the medium channel 33. At the same time, the first stirring structure 32 is started to start stirring. The material in the concentration kettle body 31 changes from transparent to yellow and then to turbid. After white vinyl sulfate is attached to the wall of the concentration kettle body 31, the first hot ethylene glycol valve is closed, the chilled water valve is opened, and chilled water is circulated into the medium channel 33. At the same time, the first stirring structure 32 keeps stirring until the concentration kettle body 31 is cooled.

[0065] Reference Figure 5 The drying unit 4 includes a drying kettle, a mother liquor storage tank 44, a washing liquid storage tank 45, a vacuum system 46 and a DTD product kettle 47.

[0066] The drying kettle comprises a drying kettle body 41, a second stirring structure 42, and a heat medium channel 43. The drying kettle body 41 is connected to the concentration kettle body 31, so that the material in the concentration kettle body 31 can enter the drying kettle body 41. The side wall of the drying kettle body 41 is provided with a filtering structure 411, which can filter the material in the drying kettle body 41, so that the filtrate enters the mother liquid storage tank 44 or the washing liquid storage tank 45. The second stirring structure 42 is provided in the drying kettle body 41, and is used to stir the material in the drying kettle body 41. The heat medium channel 43 is provided on the outer peripheral side of the drying kettle body 41, and the feed port of the heat medium channel 43 is connected to the second hot ethylene glycol feed pipe, and the second hot ethylene glycol feed pipe is provided with a second hot ethylene glycol valve for controlling the hot ethylene glycol to enter the heat medium channel 43.

[0067] The mother liquid storage tank 44 is connected to the drying kettle body 41 and is used to receive the filtrate separated from the concentration kettle body 31 and enter the drying kettle body 41. The washing liquid storage tank 45 is connected to the drying kettle body 41 and is used to receive the dichloromethane washing liquid for further purification of the crystallized vinyl sulfate.

[0068] The vacuum system 46 is connected to the drying kettle body 41 and is used to vacuum the drying kettle body 41. During drying, hot ethylene glycol is introduced into the heat medium channel 43, and then the vacuum system 46 is started to dry the vinyl sulfate in the drying kettle. The DTD product kettle 47 is connected to the drying kettle through a pipeline and is used to receive the dried vinyl sulfate.

[0069] The drying unit 4 of the present application includes a pre-treatment of solid-liquid separation and washing, wherein the solid-liquid separation is achieved by a filtering structure on the side wall of the drying kettle body 41, and a mother liquid storage tank 44 is connected to the drying kettle body 41, and is used to receive the filtrate separated from the concentration kettle body 31 and enters the drying kettle body 41. The washing liquid storage tank 45 is connected to the drying kettle body 41, and is used to receive a dichloromethane washing liquid for further purification of the crystallized vinyl sulfate. The washed vinyl sulfate is retained in the drying kettle body 41, and the drying kettle body 41 is heated by introducing hot ethylene glycol into the heat medium channel 43, and the vacuum system 46 is started at the same time to take the solvent dichloromethane out of the drying kettle body 41, so that the purification and drying of vinyl sulfate can be achieved, and the dried vinyl sulfate crystals enter the DTD product kettle 47.

[0070] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A vinyl sulfate concentration and drying device, It is characterized in that include: Crude vinyl sulfate storage unit (1): The crude vinyl sulfate storage unit (1) is used to store crude vinyl sulfate; Dehydration unit (2): the dehydration unit (2) is connected to the crude vinyl sulfate storage unit (1), and dehydrates the crude vinyl sulfate delivered from the crude vinyl sulfate storage unit (1) to obtain dehydrated crude vinyl sulfate; Concentration unit (3): the concentration unit (3) is connected to the dehydration unit (2) and concentrates the dehydrated vinyl sulfate crude product to obtain a mixed solution with precipitated vinyl sulfate crystals; Drying unit (4): The drying unit (4) is connected to the concentration unit (3) and performs solid-liquid separation, washing and drying on the mixed liquid with precipitated vinyl sulfate crystals to obtain vinyl sulfate crystals.

2. A vinyl sulfate concentration and drying device according to claim 1, It is characterized in that The crude vinyl sulfate storage unit (1) comprises: DTD crude product tank (11): the DTD crude product tank (11) is used to store crude vinyl sulfate; Frozen brine channel (12): the frozen brine channel (12) is arranged on the outer peripheral side of the DTD crude product tank (11). The feed port of the frozen brine channel (12) is connected to a frozen brine water inlet pipe, the frozen brine water inlet pipe is connected to a frozen brine valve that controls the frozen brine to enter the frozen brine channel (12), and the discharge port of the frozen brine channel (12) is connected to a frozen brine water return pipe.

3. The vinyl sulfate concentration and drying device according to claim 1, It is characterized in that The dehydration unit (2) comprises a circulation pump (21) and a molecular sieve filtration unit, wherein the feed end of the circulation pump (21) is connected to the crude vinyl sulfate storage unit (1), and the discharge end of the circulation pump (21) is connected to the molecular sieve filtration unit; The molecular sieve filtration unit comprises a plurality of molecular sieve filters (22) connected in series.

4. The vinyl sulfate concentration and drying device according to claim 3, Features: Each of the molecular sieve filters (22) is provided with a spare molecular sieve filter (23) in parallel.

5. The vinyl sulfate concentration and drying device according to claim 4, Features: The molecular sieve filtration unit comprises a desorption activation component (24), wherein the desorption activation component (24) is connected to the molecular sieve filter (22) and the spare molecular sieve filter (23); wherein the desorption activation component (24) comprises: a nitrogen source (241), wherein the nitrogen source provides nitrogen; a nitrogen heater (242), the nitrogen heater (242) being connected to the nitrogen source (241) and being used to heat the nitrogen; A nitrogen delivery pipe (243), wherein the air inlet of the nitrogen delivery pipe (243) is connected to the exhaust port of the nitrogen heater (242), and the discharge end of the nitrogen delivery pipe (243) is provided with a plurality of branches, each branch being connected to one of the molecular sieve filters (22) or one of the spare molecular sieve filters (23).

6. A vinyl sulfate concentration and drying device according to any one of claims 3 to 5, Features: The dehydration unit (2) further comprises a precision membrane filter (25), wherein a feed end of the precision membrane filter (25) is connected to a discharge end of the molecular sieve filtration unit, and the discharge end of the precision membrane filter (25) is connected to two branches, one of the branches of the discharge end of the precision membrane filter (25) is connected to the crude vinyl sulfate storage unit (1), and the other branch of the discharge end of the precision membrane filter (25) is connected to the concentration unit (3).

7. The vinyl sulfate concentration and drying device according to claim 6, It is characterized in that The concentration unit (3) comprises a concentration kettle, and the concentration kettle comprises: Concentration kettle body (31): the concentration kettle body (31) is connected to the outlet of the precision membrane filter (25), and a first stirring structure (32) is provided in the concentration kettle body (31); Medium channel (33): The medium channel (33) is arranged on the outer peripheral side of the concentration kettle body (31), and the feed port of the medium channel is connected to a chilled water feed pipe and a first hot ethylene glycol feed pipe, the chilled water feed pipe is provided with a chilled water valve for controlling the entry of chilled water into the medium channel (33), and the first hot ethylene glycol feed pipe is connected to a first hot ethylene glycol valve for controlling the entry of hot ethylene glycol into the medium channel (33).

8. The vinyl sulfate concentration and drying device according to claim 7, Features: The drying unit (4) comprises a drying kettle, a mother liquid storage tank (44), a washing liquid storage tank (45), a vacuum system (46) and a DTD product kettle (47), and the drying kettle comprises: A drying kettle body (41), the drying kettle body (41) being connected to the concentrating kettle body (31), a second stirring structure (42) being provided in the drying kettle body, and a filtering structure (411) being provided on a side wall of the drying kettle body (41); A heat medium channel (43), the heat medium channel (43) being arranged on the outer peripheral side of the drying kettle body (41), and a feed port of the heat medium channel (43) being connected to a second hot ethylene glycol feed pipe, the second hot ethylene glycol feed pipe being provided with a second hot ethylene glycol valve for controlling the hot ethylene glycol to enter the heat medium channel (43); The mother liquid storage tank (44), the washing liquid storage tank (45), the vacuum system (46) and the DTD product kettle (47) are all connected to the drying kettle body (41).

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