CN214075069U - System for removing dioxane by continuous neutralization and stripping - Google Patents
System for removing dioxane by continuous neutralization and stripping Download PDFInfo
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- CN214075069U CN214075069U CN202022191273.2U CN202022191273U CN214075069U CN 214075069 U CN214075069 U CN 214075069U CN 202022191273 U CN202022191273 U CN 202022191273U CN 214075069 U CN214075069 U CN 214075069U
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Abstract
The utility model discloses a in succession with strip and take off dioxane system, strip desorption apparatus, second grade strip desorption apparatus and circulating device including neutralization mixing arrangement, one-level strip desorption apparatus, second grade, one-level strip desorption apparatus includes one-level strip tower, first inlet pipe, sleeve, sieve, one-level condenser, one-level water ring vacuum pump, locates one-level tailpipe pipe, connection on the one-level water ring vacuum pump the first connecting pipe and the connection of one-level condenser and one-level strip tower the second connecting pipe of one-level condenser and one-level water ring vacuum pump, evenly be equipped with a plurality of round holes on the sieve.
Description
Technical Field
The utility model belongs to the technical field of sulfonated product processing, especially, relate to a in succession with strip and take off dioxane system.
Background
Because the fatty alcohol ether sulfate has excellent surface activity and biodegradability, the fatty alcohol ether sulfate is widely applied to the fields of personal washing, personal washing and various industrial applications, because the fatty alcohol ether can generate a byproduct dioxane in the sulfonation process, and the dioxane is a 2B carcinogen identified by the international agency for research on cancer (IARC), the content of the dioxane in the alcohol ether sulfate is definitely specified at home and abroad, and the content of the dioxane in the fatty alcohol ether sulfate is required to be not higher than 70ppm (calculated by products) by the national industry standard.
In order to control the content of dioxane in the fatty alcohol ether sulfate product, manufacturers generally adopt the following means: 1) the reaction conditions are adjusted to make the sulfonation reaction milder and reduce the generation amount of the dioxane;
2) and (5) removing the method at the later stage. The content of dioxane in the fatty alcohol ether sulfate product on the market is 20-30ppm at present, but some downstream enterprises put forward higher requirements on indexes of dioxane in order to further improve the product safety, hopefully, the content of dioxane is below 10ppm, and the fatty alcohol ether sulfate obtained by conventional production means on the market cannot meet the requirements.
SUMMERY OF THE UTILITY MODEL
The utility model provides a continuous neutralization and stripping dioxane-removing system for overcoming the defects of the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a continuous neutralization stripping dioxane-removing system comprises a neutralization mixing device, a primary stripping removing device, a secondary stripping removing device and a circulating device, wherein the primary stripping removing device comprises a primary stripping tower, a first feeding pipe, a sleeve arranged in the primary stripping tower, a sieve plate arranged on the inner wall of the sleeve, a primary condenser, a primary water ring vacuum pump, a primary tail gas pipe arranged on the primary water ring vacuum pump, a first connecting pipe for connecting the primary condenser and the primary stripping tower and a second connecting pipe for connecting the primary condenser and the primary water ring vacuum pump, and a plurality of round holes are uniformly formed in the sieve plate; alcohol ether sulfate, liquid caustic soda and process water are mixed and neutralized through a neutralization and mixing device and are conveyed to a first-stage stripping tower through a first feeding pipe, the materials are dispersed into material drops through a multi-sieve plate in the first-stage stripping tower, dioxane and water in the material drops are removed in an azeotropic mode in a negative pressure state, a part of bubbles carried in the material drops can be removed through the sieve plate, the materials removed by the first-stage stripping tower enter a second-stage stripping tower, the dioxane is further removed, the materials removed by the second-stage stripping tower partially return to the first-stage stripping tower through a circulating device, and the other part of the materials enter a product tank; the utility model discloses utilize water and dioxane azeotropic principle, through two-stage vacuum stripping circulation desorption dioxane, can obviously improve the desorption efficiency of dioxane, make dioxane content in the fatty alcohol ether sulfate product be less than 10ppm, the index such as pH that has the product simultaneously is more stable, bubble smuggleing still less in the product, is favorable to advantages such as later stage canning.
Preferably, the mixing device comprises a neutralization mixing pump, a mixing sleeve matched with the neutralization mixing pump and a third connecting pipe for connecting the neutralization mixing pump and the first feeding pipe, wherein the mixing sleeve is provided with four layers, and process water, liquid caustic soda, sulfate and circulating return materials are sequentially supplied to the mixing sleeve from inside to outside.
Preferably, the secondary stripping and removing device comprises a secondary stripping tower, a first discharge pipe arranged at the bottom of the primary stripping tower, a primary material circulating pump, a material heater, a fourth connecting pipe for connecting the primary material circulating pump and the material heater, a second feed pipe arranged at the top of the secondary stripping tower, a nozzle arranged at the end part of the second feed pipe, a secondary condenser, a secondary water ring vacuum pump, a fifth connecting pipe for connecting the secondary condenser and the secondary stripping tower, a sixth connecting pipe for connecting the secondary condenser and the secondary water ring vacuum pump, and a secondary tail gas pipe arranged on the secondary water ring vacuum pump; the material behind the one-level stripper desorption gets into the second grade stripper through circulating pump and heater, and the nozzle dispersion in the material through the second grade stripper becomes more tiny gob, further desorption dioxane under negative pressure state.
Preferably, the circulating device comprises a second discharge pipe arranged at the bottom of the secondary stripping tower, a secondary material circulating pump, a discharge pipe communicated with an outlet of the secondary material circulating pump, and a material circulating pipe matched with the discharge pipe, wherein the material circulating pipe is communicated with the mixing sleeve; and a part of the material removed by the secondary stripping tower returns to the primary stripping tower through a material circulating pipe by the circulating pump, and the other part of the material enters the product tank through a discharge port.
Preferably, the aperture of the round hole is 0.5-5 mm.
To sum up, the utility model discloses utilize water and dioxane azeotropic principle, through two-stage vacuum stripping circulation desorption dioxane, can obviously improve the desorption efficiency of dioxane, make dioxane content in the fatty alcohol ether sulfate product be less than 10ppm, the index such as pH that has the product simultaneously is more stable, bubble smuggleing still less in the product, is favorable to advantages such as later stage canning.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the primary stripping and removal device.
Fig. 3 is a schematic diagram of the internal structure of the two-stage stripping and removal device.
Detailed Description
As shown in fig. 1 to 3, a system for removing dioxane by continuous neutralization and stripping comprises a neutralization mixing device, a primary stripping and removing device, a secondary stripping and removing device and a circulating device, specifically, the mixing device comprises a neutralization mixing pump 11, a mixing sleeve 12 and a third connecting pipe 13, and the neutralization mixing pump 11 is a conventional mixing pump; one end of the mixing sleeve 12 is communicated with a neutralization mixing pump, and the mixing sleeve is provided with four layers, and process water, liquid caustic soda, sulfate and circulating feed back are supplied to the mixing sleeve from inside to outside in sequence; one end of the third connecting pipe 13 is communicated with a liquid outlet of the neutralization mixing pump.
Specifically, the primary stripping and removing device comprises a primary stripping tower 21, a first feeding pipe 22, a sleeve 29, a sieve plate 23, a primary condenser 24, a first connecting pipe 25, a second connecting pipe 26, a primary water ring vacuum pump 27 and a primary tail gas pipe 28, wherein a feeding hole 211 is formed in the top of the primary stripping tower 21; one end of the first feeding pipe 22 is fixed at the feeding hole 211 at the top of the primary stripping tower, and the other end is communicated with a third connecting pipe; the sleeve 29 is fixed at the top in the primary stripping tower and just covers the feed inlet, so that the material falling from the feed inlet is prevented from being directly sucked into the primary condenser in the air extraction process of the primary water ring vacuum pump; the sieve plate 23 is fixed on the inner wall of the sleeve and is uniformly provided with a plurality of round holes, and the aperture of each round hole is 0.5-5mm, preferably 2.25 mm; one end of the first connecting pipe 25 is fixed on the side wall of the primary stripping tower; the first-stage condenser 24 is a conventional condenser, and an air inlet of the first-stage condenser is communicated with the first connecting pipe; the primary water ring vacuum pump 27 is a conventional water ring vacuum pump; one end of the second connecting pipe 26 is connected to the primary condenser, and the other end is connected to the primary water ring vacuum pump; the primary tail gas pipe 28 is connected to a primary water ring vacuum pump.
Specifically, the secondary stripping comprises a removing device which comprises a secondary stripping tower 31, a first discharging pipe 32, a primary material circulating pump 33, a material heater 34, a fourth connecting pipe 35, a second feeding pipe 36, a nozzle 37, a protective sleeve 371, a secondary condenser 38, a secondary water ring vacuum pump 39, a fifth connecting pipe 381, a sixth connecting pipe 391 and a secondary tail gas pipe 392, wherein one end of the first discharging pipe 32 is communicated with the bottom of the primary stripping tower, and the other end of the first discharging pipe is connected with the primary material circulating pump; the first-stage material circulating pump 33 adopts a conventional material circulating pump; one end of the fourth connecting pipe 35 is communicated with the first-stage material circulating pump, and the other end is communicated with the material heater 34; one end of the second feeding pipe 36 is communicated with the top of the secondary stripping tower 31, and the other end of the second feeding pipe is communicated with the material heater; the nozzle 37 is fixed on the end of the second feed tube; the protective sleeve 371 is fixed at the top in the secondary stripping tower, and the nozzle 37 is covered in the protective sleeve; the secondary condenser 38 is a conventional condenser; one end of the fifth connecting pipe 381 is communicated with the secondary condenser, and the other end is communicated with the secondary stripping tower; the secondary water ring vacuum pump 39 is a conventional water ring vacuum pump; one end of the sixth connecting pipe 391 is communicated with the secondary water ring vacuum pump, and the other end of the sixth connecting pipe 391 is connected with the secondary condenser; the secondary tail gas pipe 392 is arranged on the secondary water ring vacuum pump.
Specifically, the circulating device comprises a second discharging pipe 41, a secondary material circulating pump 42, a discharging pipe 43 and a material circulating pipe 44, wherein one end of the second discharging pipe 41 is connected to the bottom of the secondary stripping tower; a liquid inlet of the second-stage material circulating pump 42 is communicated with a second discharging pipe; the discharge pipe 43 is communicated with a discharge hole of the second-stage material circulating pump 42; one end of the material circulating pipe 44 is communicated with the discharging pipe, the other end of the material circulating pipe is mixed with the sleeve, and the material circulating ratio is 12: 1-25: 1.
The utility model discloses a theory of operation is: alcohol ether sulfate, liquid caustic soda and process water simultaneously enter a neutralization mixing pump through a mixing sleeve to be mixed and neutralized, then enter a first-stage stripping tower together with circulating return materials, the materials are dispersed into droplets through a multi-sieve plate in the first-stage stripping tower, dioxane and water in the droplets are azeotropically removed in a negative pressure state, a part of bubbles carried in the droplets can be removed through the sieve plate, the materials removed by the first-stage stripping tower enter a second-stage stripping tower through a first-stage material circulating pump and a first-stage material heater, the dioxane is further removed, the materials removed by the second-stage stripping tower partially return to the first-stage stripping tower through a circulating device, and the other part of the materials enter a product tank; the utility model discloses utilize water and dioxane azeotropic principle, through two-stage vacuum stripping circulation desorption dioxane, can obviously improve the desorption efficiency of dioxane, make dioxane content in the fatty alcohol ether sulfate product be less than 10ppm, the index such as pH that has the product simultaneously is more stable, bubble smuggleing still less in the product, is favorable to advantages such as later stage canning.
Claims (5)
1. The utility model provides a continuous neutralization strip removes dioxane system, includes neutralization mixing arrangement, first grade strip desorption device, second grade strip desorption device and circulating device, its characterized in that: one-level strip desorption device includes one-level strip tower (21), first inlet pipe (22), locates locate sleeve (29) in the one-level strip tower, locate sieve (23), one-level condenser (24), one-level water ring vacuum pump (27) on sleeve (29) inner wall, locate one-level tail gas pipe (28), connection on the one-level water ring vacuum pump one-level condenser and first connecting pipe (25) and the connection of one-level strip tower one-level condenser and one-level water ring vacuum pump's second connecting pipe (26), evenly be equipped with a plurality of round holes on the sieve.
2. The continuous neutralization and stripping dioxane removal system according to claim 1, wherein: the mixing device comprises a neutralization mixing pump (11), a mixing sleeve (12) matched with the neutralization mixing pump and a third connecting pipe (13) connected with the neutralization mixing pump and the first feeding pipe, wherein the mixing sleeve is provided with four layers, and process water, liquid caustic soda, sulfate and circulating return materials are supplied to the mixing sleeve from inside to outside in sequence.
3. The continuous neutralization and stripping dioxane removal system according to claim 1, wherein: second grade strip desorption device includes second grade stripper (31), locates first discharging pipe (32), one-level material circulating pump (33), material heater (34), the connection of one-level material circulating pump and material heater's fourth connecting pipe (35), locate second inlet pipe (36) at second grade stripper top, locate nozzle (37), second grade condenser (38), second grade water ring vacuum pump (39), connection on the second inlet pipe tip fifth connecting pipe (381), connection of second grade condenser and second grade stripper sixth connecting pipe (391) of second grade condenser and second grade water ring vacuum pump and locating second grade tail gas pipe (392) on the second grade water ring vacuum pump.
4. A continuous neutralization and stripping dioxane removal system according to claim 3, wherein: circulating device including locate second discharging pipe (41), second grade material circulating pump (42) of second grade stripper bottom, with the export intercommunication of second grade material circulating pump arrange material pipe (43) and with arrange material pipe complex material circulating pipe (44), material circulating pipe and mixing sleeve intercommunication.
5. The continuous neutralization and stripping dioxane removal system according to claim 1, wherein: the aperture of the round hole is 0.5-5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022191273.2U CN214075069U (en) | 2020-09-29 | 2020-09-29 | System for removing dioxane by continuous neutralization and stripping |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022191273.2U CN214075069U (en) | 2020-09-29 | 2020-09-29 | System for removing dioxane by continuous neutralization and stripping |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908658A (en) * | 2021-10-25 | 2022-01-11 | 轻工业杭州机电设计研究院有限公司 | Safe and environment-friendly processing method and processing system for producing dioxane by sulfonation device |
| CN114130053A (en) * | 2021-09-06 | 2022-03-04 | 中轻化工绍兴有限公司 | High-efficient neutralization steam stripping device of no gel zone class high concentration sulfonated product |
| CN116199606A (en) * | 2023-02-15 | 2023-06-02 | 南京为先科技有限责任公司 | New process method for removing dioxane by neutralization vacuum stripping |
-
2020
- 2020-09-29 CN CN202022191273.2U patent/CN214075069U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114130053A (en) * | 2021-09-06 | 2022-03-04 | 中轻化工绍兴有限公司 | High-efficient neutralization steam stripping device of no gel zone class high concentration sulfonated product |
| CN113908658A (en) * | 2021-10-25 | 2022-01-11 | 轻工业杭州机电设计研究院有限公司 | Safe and environment-friendly processing method and processing system for producing dioxane by sulfonation device |
| CN113908658B (en) * | 2021-10-25 | 2024-03-12 | 轻工业杭州机电设计研究院有限公司 | Safe and environment-friendly treatment method and treatment system for generating dioxane by sulfonation device |
| CN116199606A (en) * | 2023-02-15 | 2023-06-02 | 南京为先科技有限责任公司 | New process method for removing dioxane by neutralization vacuum stripping |
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