Solid sodium dodecyl sulfate production plant

Abstract

The utility model relates to solid dodecyl sodium sulfate production device, solve the solid dodecyl sodium sulfate production device of existing solid dodecyl sodium sulfate production device in screw conveyor and solid dodecyl sodium sulfate conveying pipe easy to occur material sticking accumulation, bring the difficult problem of material conveying, technical scheme is: solid dodecyl sodium sulfate production device, including the scraper membrane dryer, screw conveyor and solid dodecyl sodium sulfate conveying pipe, screw conveyor export input solid dodecyl sodium sulfate conveying pipe, the production device includes cooling roll press (20), the scraper membrane dryer discharge port input cooling roll press feed inlet, and the cooling roll press discharge port inputs screw conveyor entrance.

Description

Technical Field

[0001] This utility model relates to a production apparatus for solid sodium dodecyl sulfate. Background Technology

[0002] In the prior art, solid sodium dodecyl sulfate (K12) can be produced through the following process: sodium dodecyl sulfate slurry is dried at a temperature of about 110°C by a scraper dryer, then conveyed by a screw conveyor to a solid sodium dodecyl sulfate conveying pipe, and then sent to a solid sodium dodecyl sulfate molding unit via the solid sodium dodecyl sulfate conveying pipe.

[0003] However, in the current production equipment, material adhesion and accumulation are prone to occur in the screw conveyor and the solid sodium dodecyl sulfate conveying pipe downstream of the screw conveyor, which makes material conveying difficult and may even cause the production equipment to be overloaded and shut down involuntarily. In order to ensure smooth production, it is necessary to frequently clean the inside of the screw conveyor and the solid sodium dodecyl sulfate conveying pipe. Involuntary shutdowns can also damage the equipment. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing solid sodium dodecyl sulfate production equipment is prone to material adhesion and accumulation in the screw conveyor and solid sodium dodecyl sulfate conveying pipe, which makes material conveying difficult.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: The solid sodium dodecyl sulfate production apparatus includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40). The production apparatus includes a cooling roller press (20). The scraped film dryer (10) outlet is fed into the cooling roller press (20) inlet, and the cooling roller press (20) outlet is fed into the screw conveyor inlet (32).

[0006] The use of a cooling roller press reduces the temperature of the material entering the screw conveyor (30), thereby reducing the risk of material sticking and clogging in the screw conveyor (30) and in the solid sodium dodecyl sulfate conveying pipe (40).

[0007] In the above technical solution, the cooling roller press (20) preferably includes a first cooling roller (21) and a second cooling roller (22). More preferably, of the first cooling roller (21) and the second cooling roller (22), one cooling roller is a shallow cooling roller and the other is a deep cooling roller. Due to the different set temperatures of the shallow cooling roller and the deep cooling roller, there is a temperature difference. The existence of the temperature difference allows the material processed by the cooling roller press (20) to more smoothly leave the cooling roller and enter the next process.

[0008] In the above technical solution, a solid sodium dodecyl sulfate conveying pipe (40) can be configured with an air lift inlet channel (41).

[0009] In the above technical solution, an air lift heater (50) can be installed in the air lift inlet channel (41).

[0010] The presence of the air-lift heater (50) enhances the effect of removing moisture from the material while it is being transported through the solid sodium dodecyl sulfate conveying pipe (40), and reduces the tendency of the material to stick to the solid sodium dodecyl sulfate conveying pipe (40).

[0011] In the above technical solution, it is preferable to install an air-lifting dryer (60) in the air-lifting inlet channel (41), and the air-lifting dryer (60) is located between the inlet of the air-lifting inlet channel (41) and the air-lifting heater (50).

[0012] In the above technical solution, the air-lift dryer (60) is preferred as a cooling dryer.

[0013] In the above technical solution, it is preferable that the cooling dryer is provided with a condensate outlet (63).

[0014] In the above technical solution, it is preferred that the cooling dryer is provided with a refrigerant inlet (61) and a refrigerant outlet (62).

[0015] In the cooling dryer, the stripping air is cooled, and the water condensed from the stripping air due to cooling is discharged. Although the absolute water content in the stripping air is reduced, the stripping air is still present in the form of water mist due to its low temperature and the presence of tiny water droplets that have not been separated. When the low temperature and water mist-laden stripping air come into contact with the material in the solid sodium dodecyl sulfate conveying pipe (40), the combined effect of the low temperature and water mist reduces the stripping effect of the stripping air on the moisture in the material in the solid sodium dodecyl sulfate conveying pipe (40), and increases the tendency of the material to stick to the solid sodium dodecyl sulfate conveying pipe (40). If the stripped air treated by the cooling dryer is heated by the stripped air heater (50) before contacting the material, the water droplets in the water mist will be vaporized. This not only reduces the water content in the stripped air, but also eliminates the presence of water mist and increases the temperature of the stripped air. When used to transport solid sodium dodecyl sulfate, this significantly reduces the tendency of the solid sodium dodecyl sulfate conveying pipe (40) to stick to the material. Therefore, the cooling dryer (60) is set before the stripped air heater (50) and plays a synergistic role in reducing the tendency of the material to stick to the solid sodium dodecyl sulfate conveying pipe (40).

[0016] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first embodiment of the present invention; Figure 2 This is a schematic diagram of the second embodiment of the present invention; Figure 3 This is a schematic diagram of the third embodiment of the present invention; Figure 4 This is a schematic diagram of the fourth embodiment of the present invention; Figure 5 This is a schematic diagram of an existing solid sodium dodecyl sulfate production facility.

[0018] In the picture: 10 is a scraped film dryer; 11 represents a scraper; 12 is a steam heating jacket; 13 is the water vapor inlet; 14 is the moisture outlet; 15 is the motor for the scraped film dryer; 16 is the inlet for sodium dodecyl sulfate slurry; 17 is the rotating shaft of the scraped film dryer; 18 is the condensate outlet; 19 is the scraper mounting bracket; 20 is a cooling roller press; 21 is the first cooling roller; 22 is the second cooling roller; 30 is a screw conveyor; 31 is the screw; 32 is the inlet of the screw conveyor; 33 is the outlet of the screw conveyor; 34 is a screw conveyor motor; 40 is a solid sodium dodecyl sulfate delivery pipe; 41. Air intake channel; 50 is an air-lifting heater; 60 is an air-lift dryer; 61 is the refrigerant inlet; 62 is the refrigerant outlet; 63 is the condensate outlet. Detailed Implementation

[0019] During the process of the screw conveyor (30) changing from unobstructed to blocked, the current of the screw conveyor gradually increases. After reaching the critical current, the current rises sharply, quickly causing blockage, and the device is passively stopped at the same time. In order to protect the device, a current alarm is set in the specific implementation. The alarm current of the current alarm is set to 4A. When the current rises to 4A, the current alarm will sound an alarm, which is regarded as an impending blockage. At this time, the device will be actively stopped to clear the blockage.

[0020] During the process of the solid sodium dodecyl sulfate delivery pipe (40) changing from unobstructed to blocked, the air pressure at the inlet of the air lift inlet channel (41) gradually increases. After reaching the critical pressure, the pressure rises sharply and quickly causes the solid sodium dodecyl sulfate delivery pipe (40) to become blocked. At the same time, the device is passively shut down. In order to protect the device, in a specific embodiment, a pressure alarm is installed at the inlet of the air lift inlet channel (41). The alarm air pressure of the pressure alarm is set to 3 kPa. When the air pressure (gauge pressure) rises to 3 kPa, the pressure alarm sounds an alarm, which is regarded as an impending blockage. At this time, the device is actively shut down to clear the blockage.

[0021] 0. Existing solid sodium dodecyl sulfate production facilities

[0022] See Figure 5 .

[0023] 0.1 Implementation Method

[0024] The solid sodium dodecyl sulfate production unit includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40), and the scraped film dryer (10) outlet is fed into the screw conveyor inlet (32).

[0025] The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

[0026] 0.2, Example

[0027] Scraped film dryer (10): Dimensions ф1010×12157mm, heat exchange area 23m² 2 ; Screw conveyor (30): Dimensions ф400×3000mm; Solid sodium dodecyl sulfate delivery pipe (40): ф150mm.

[0028] 0.2.2 Operational Status

[0029] The slurry containing 70% sodium dodecyl sulfate by weight was fed at a rate of 2000 kg / h into a scraped film dryer. The drying temperature was set at 110℃, the drying negative pressure at 95 kPa, and the scraped film rotor speed at 226 r / min. After scraped film drying, the material temperature was 95 ± 5℃. The material was then conveyed by a screw conveyor to the conveying pipe (40) and transported to the next unit by air lift. The air lift was air with a flow rate of 7500 m / s. 3 / h represents the ambient temperature, which is 23±4℃.

[0030] When the slurry feed to the scraper dryer was 7 hours in, the current alarm went off and the machine automatically stopped. The screw conveyor was severely blocked. The blockage in the screw conveyor was cleaned. The solid sodium dodecyl sulfate conveying pipe was also found to be blocked and was cleaned as well.

[0031] 1. First Implementation Method

[0032] See Figure 1 .

[0033] 1.1 Implementation Method

[0034] The solid sodium dodecyl sulfate production apparatus includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40). The production apparatus includes a cooling roller press (20). The scraped film dryer (10) outlet is fed into the cooling roller press (20) inlet, and the cooling roller press (20) outlet is fed into the screw conveyor inlet (32).

[0035] The cooling roller press (20) includes a first cooling roller (21) and a second cooling roller (22). Of the two cooling rollers, one is a shallow cooling roller and the other is a deep cooling roller.

[0036] The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

[0037] 1.2 Implementation Examples

[0038] Scraped film dryer (10): Dimensions ф1010×12157mm, heat exchange area 23m² 2 ; Screw conveyor (30): Dimensions ф400×3000mm; Solid sodium dodecyl sulfate delivery pipe (40): ф150mm; First cooling roller and second cooling roller: ф1200×1750mm, gap between the two cooling rollers 2mm.

[0039] 1.2.2 Operational Status

[0040] The feed rate of sodium dodecyl sulfate slurry with a weight content of 70% is 2000 kg / h. It enters the scraped film dryer for drying. The drying temperature is set at 110℃, the drying negative pressure is set at 95 kPa, and the scraped film rotor speed is set at 226 r / min. The material temperature after scraped film drying is 95 ± 5℃. The material enters the cooling roller press. The first cooling roller is set at 20℃ as a deep cooling roller, and the second cooling roller is set at 30℃ as a shallow cooling roller. The speed of both cooling rollers is 15 r / min. The material temperature at the outlet of the cooling roller press is 60 ± 5℃. Then the material enters the screw conveyor and is conveyed to the conveying pipe (40) and conveyed to the next unit by air lifting. The air lifting is air with a flow rate of 7500 m / s. 3 / h represents the ambient temperature, which is 23±4℃.

[0041] When the slurry feed to the scraper dryer reaches 22 hours, the pressure alarm sounds, the machine automatically stops, and the blockage in the solid sodium dodecyl sulfate conveying pipe is cleared. The screw conveyor is checked and found to be free of blockage.

[0042] 2. Second implementation method

[0043] See Figure 2 .

[0044] 2.1 Implementation Method

[0045] The solid sodium dodecyl sulfate production apparatus includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40). The production apparatus includes a cooling roller press (20). The scraped film dryer (10) outlet is fed into the cooling roller press (20) inlet, and the cooling roller press (20) outlet is fed into the screw conveyor inlet (32).

[0046] The cooling roller press (20) includes a first cooling roller (21) and a second cooling roller (22). Of the two cooling rollers, one is a shallow cooling roller and the other is a deep cooling roller.

[0047] The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

[0048] An air lift heater (50) is installed in the air lift inlet channel (41).

[0049] 2.2 Implementation Examples

[0050] Scraped film dryer (10): Dimensions ф1010×12157mm, heat exchange area 23m² 2 ; Screw conveyor (30): Dimensions ф400×3000mm; Solid sodium dodecyl sulfate delivery pipe (40): ф150mm; First cooling roller and second cooling roller: ф1200×1750mm, gap between the two cooling rollers 2mm; Airlift heater: Middle cylinder 600*600*600mm, two end cones 400mm each, total length 1400mm; heat exchange area 40m² 2 .

[0051] 2.2.2 Operational Status

[0052] The feed rate of sodium dodecyl sulfate slurry with a weight content of 70% is 2000 kg / h. It enters the scraped film dryer for drying. The drying temperature is set at 110℃, the drying negative pressure is set at 95KPa, and the scraped film rotor speed is set at 226r / min. The material temperature after scraped film drying is 95±5℃. The material enters the cooling roller press. The first cooling roller is set at 20℃ as a deep cooling roller, and the second cooling roller is set at 30℃ as a shallow cooling roller. The speed of both cooling rollers is 15r / min. The material temperature at the outlet of the cooling roller press is 60±5℃. Then the material enters the screw conveyor and is conveyed to the conveying pipe (40) and conveyed to the next unit by air lifting. The air lifting method is to set the temperature of the air lifting heater (50) to 34℃, and to feed air at a temperature of 23±4℃ at a speed of 7500m 3 A flow rate of / h is input into the air-lift heater (50) for heating, and then input into the solid sodium dodecyl sulfate delivery pipe (40).

[0053] When the slurry feed to the scraper dryer reaches 17 hours, the pressure alarm sounds, the machine automatically stops, and the blockage in the solid sodium dodecyl sulfate conveying pipe is cleared. The screw conveyor is checked and found to be free of blockage.

[0054] 3. Third implementation method

[0055] See Figure 3 .

[0056] 3.1 Implementation Method

[0057] The solid sodium dodecyl sulfate production apparatus includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40). The production apparatus includes a cooling roller press (20). The scraped film dryer (10) outlet is fed into the cooling roller press (20) inlet, and the cooling roller press (20) outlet is fed into the screw conveyor inlet (32).

[0058] The cooling roller press (20) includes a first cooling roller (21) and a second cooling roller (22). Of the two cooling rollers, one is a shallow cooling roller and the other is a deep cooling roller.

[0059] The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

[0060] An air-lift dryer (60) is installed in the air-lift inlet channel (41).

[0061] The air-lift dryer (60) is a cooling dryer.

[0062] The cooling dryer is provided with a condensate outlet (63).

[0063] The cooling dryer is provided with a refrigerant inlet (61) and a refrigerant outlet (62).

[0064] 3.2 Implementation Examples

[0065] Scraped film dryer (10): Dimensions ф1010×12157mm, heat exchange area 23m² 2 ; Screw conveyor (30): Dimensions ф400×3000mm; Solid sodium dodecyl sulfate delivery pipe (40): ф150mm; First cooling roller and second cooling roller: ф1200×1750mm, gap between the two cooling rollers 2mm; Air-lift dryer: a cooling dryer, with a middle cylinder of 600*600*600mm, two 400mm conical ends, and a total length of 1400mm; heat exchange area of ​​40m². 2 The condensate outlet (63) is a steam trap.

[0066] 3.2.2 Operational Status

[0067] The feed rate of sodium dodecyl sulfate slurry with a weight content of 70% is 2000 kg / h. It enters the scraped film dryer for drying. The drying temperature is set at 110℃, the drying negative pressure is set at 95KPa, and the scraped film rotor speed is set at 226r / min. After scraped film drying, the material temperature is 95±5℃. The material enters the cooling roller press. The first cooling roller is set at 20℃ as a deep cooling roller, and the second cooling roller is set at 30℃ as a shallow cooling roller. The speed of both cooling rollers is 15r / min. The material temperature at the outlet of the cooling roller press is 60±5℃. Then the material enters the screw conveyor and is conveyed to the conveying pipe (40) and conveyed to the next unit by air lifting. The air lifting method is to set the temperature of the air lifting dryer (60) to 8℃, and to feed air at a temperature of 23±4℃ at a speed of 7500m 3 The gas is fed into the air-lift dryer (60) at a flow rate of / h for cooling. The condensate in the air-lift dryer is automatically drained by the steam trap. Then the gas is fed into the solid sodium dodecyl sulfate delivery pipe (40).

[0068] When the slurry feed to the scraper dryer has been running for 5 hours, the pressure alarm will sound and the machine will automatically stop. Clean the blockage in the solid sodium dodecyl sulfate conveying pipe and check that there is no blockage in the screw conveyor.

[0069] 4. Fourth implementation method

[0070] See Figure 4 .

[0071] 4.1 Implementation Method

[0072] The solid sodium dodecyl sulfate production apparatus includes a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40). The screw conveyor outlet (33) is fed into the solid sodium dodecyl sulfate conveying pipe (40). The production apparatus includes a cooling roller press (20). The scraped film dryer (10) outlet is fed into the cooling roller press (20) inlet, and the cooling roller press (20) outlet is fed into the screw conveyor inlet (32).

[0073] The cooling roller press (20) includes a first cooling roller (21) and a second cooling roller (22). Of the two cooling rollers, one is a shallow cooling roller and the other is a deep cooling roller.

[0074] The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

[0075] An air-lifting inlet channel (41) is provided with an air-lifting heater (50) and an air-lifting dryer (60).

[0076] The air-lift dryer (60) is located between the inlet of the air-lift inlet channel (41) and the air-lift heater (50).

[0077] The air-lift dryer (60) is a cooling dryer.

[0078] The cooling dryer is provided with a condensate outlet (63).

[0079] The cooling dryer is provided with a refrigerant inlet (61) and a refrigerant outlet (62).

[0080] 4.2 Implementation Examples

[0081] Scraped film dryer (10): Dimensions ф1010×12157mm, heat exchange area 23m² 2 ; Screw conveyor (30): Dimensions ф400×3000mm; Solid sodium dodecyl sulfate delivery pipe (40): ф150mm; First cooling roller and second cooling roller: ф1200×1750mm, gap between the two cooling rollers 2mm; Air-lift dryer: a cooling dryer, with a middle cylinder of 600*600*600mm, two 400mm conical ends, and a total length of 1400mm; heat exchange area of ​​40m². 2 The condensate outlet (63) is a steam trap.

[0082] Airlift heater: Middle cylinder 600*600*600mm, two end cones 400mm each, total length 1400mm; heat exchange area 40m² 2 .

[0083] 4.2.2 Operational Status

[0084] The feed rate of sodium dodecyl sulfate slurry with a weight content of 70% is 2000 kg / h. It enters the scraped film dryer for drying. The drying temperature is set at 110℃, the drying negative pressure is set at 95KPa, and the scraped film rotor speed is set at 226r / min. The material temperature after scraped film drying is 95±5℃. The material enters the cooling roller press. The first cooling roller is set at 20℃ as a deep cooling roller, and the second cooling roller is set at 30℃ as a shallow cooling roller. The speed of both cooling rollers is 15r / min. The material temperature at the outlet of the cooling roller press is 60±5℃. Then the material enters the screw conveyor and is conveyed to the conveying pipe (40) and conveyed to the next unit by air lifting. The air lifting method is to set the temperature of the air lifting dryer (60) to 8℃, set the temperature of the air lifting heater (50) to 34℃, and bring air at a temperature of 23±4℃ to a speed of 7500m 3 The gas is fed into the air-lift dryer (60) at a flow rate of / h for cooling. The condensate drains out of the air-lift dryer automatically. Then the gas is fed into the air-lift heater (50) for heating and then into the solid sodium dodecyl sulfate delivery pipe (40).

[0085] From the start of slurry feeding into the scraper dryer, the unit operated continuously for 30 days without any alarms from the pressure alarm or pressure alarm device.

Claims

1. A solid sodium dodecyl sulfate production apparatus, comprising a scraped film dryer (10), a screw conveyor (30), and a solid sodium dodecyl sulfate conveying pipe (40), wherein the outlet (33) of the screw conveyor is fed into the solid sodium dodecyl sulfate conveying pipe (40), characterized in that: The production device includes a cooling roller press (20), a scraped film dryer (10) outlet that enters the cooling roller press (20) inlet, and a cooling roller press (20) outlet that enters the screw conveyor inlet (32).

2. The production apparatus according to claim 1, characterized in that: The cooling roller press (20) includes a first cooling roller (21) and a second cooling roller (22).

3. The production apparatus according to claim 1, characterized in that: The solid sodium dodecyl sulfate delivery pipe (40) is equipped with an air lift inlet channel (41).

4. The production apparatus according to claim 2, characterized in that: An air lift heater (50) is installed in the air lift inlet channel (41).

5. The production apparatus according to claim 4, characterized in that: An air-lifting dryer (60) is provided in the air-lifting inlet channel (41), and the air-lifting dryer (60) is located between the inlet of the air-lifting inlet channel (41) and the air-lifting heater (50).

6. The production apparatus according to claim 5, characterized in that: The air-lift dryer (60) is a cooling dryer.

7. The production apparatus according to claim 6, characterized in that: The cooling dryer is provided with a condensate outlet (63).

8. The production apparatus according to claim 6, characterized in that: The cooling dryer is provided with a refrigerant inlet (61) and a refrigerant outlet (62).

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