Combined dioxane removal equipment

Abstract

The utility model provides combined dioxane removal equipment which comprises a stripping tower, a discharge port is arranged at the bottom of the stripping tower, a first heat exchanger and a second heat exchanger are respectively arranged at the top of the stripping tower, a mixer connected with the first heat exchanger is arranged at the top of the first heat exchanger, and a mixer connected with the second heat exchanger is arranged at the top of the second heat exchanger. A first feeding hole and a second feeding hole are respectively formed in the top of the mixer; the top of the second heat exchanger is connected with a vacuum system. According to the device, the mixer, the stripping tower and the two heat exchangers are combined into a whole, so that the purpose of removing dioxane in AES again is achieved, and compared with a dispersed structural design, the occupied area can be reduced, and the cost of installation construction and pipeline laying is effectively reduced; according to the utility model, the second heat exchanger is connected with the vacuum system, so that the removal amount of the dioxane is increased, and the dioxane is more effectively removed.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfonation product processing, in particular to a combined dioxane removal device. Background Art

[0002] Fatty alcohol polyoxyethylene ether sodium sulfate, referred to as AES, has excellent cleaning, emulsification, foaming and hard water resistance properties, mild washing properties that will not damage the skin, and is widely used in personal care, dishwashing and various industrial applications. Since fatty alcohol ethers produce dioxane as a byproduct during the sulfonation process, and dioxane is a Class 2B carcinogen identified by the International Agency for Research on Cancer, the effective removal of dioxane from AES is one of the technical difficulties in this field, thus limiting the application of AES in the high-quality daily chemical industry.

[0003] At present, dioxane is usually removed by distillation, but the distillation device and other devices are dispersed and connected by pipelines. This dispersed structural design not only takes up a lot of space, but also increases the cost of installation and pipeline laying, and the removal efficiency of dioxane is not high. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a combined dioxane removal device to solve the problems of large space occupation, high pipeline laying cost and low dioxane removal efficiency of the prior art distributed distillation treatment device.

[0005] To achieve the above-mentioned purpose and other related purposes, the utility model provides a combined dedioxane equipment, including a stripping tower, a discharge port is provided at the bottom of the stripping tower, a first heat exchanger and a second heat exchanger are respectively arranged on the top of the stripping tower, a mixer connected to each other is provided on the top of the first heat exchanger, and a first feed port and a second feed port are respectively provided on the top of the mixer; the top of the second heat exchanger is connected to a vacuum system.

[0006] In one embodiment of the present invention, a hot water outlet is provided at the bottom of the first heat exchanger, and a hot water inlet is provided at the top of the first heat exchanger; a cooling water inlet is provided at the bottom of the second heat exchanger, and a cooling water outlet is provided at the top of the second heat exchanger.

[0007] In one embodiment of the utility model, the stripping tower includes an upper section, a middle section and a lower section, the inner diameter of the upper section gradually expands from top to bottom, the middle section is a straight cylinder section, the inner diameter of the lower section gradually shrinks from top to bottom, and the discharge port is arranged at the bottom of the lower section.

[0008] In one embodiment of the present invention, the expansion tendency of the inner diameter of the upper section is smaller than the contraction tendency of the inner diameter of the lower section.

[0009] In one embodiment of the present invention, the temperature in the stripping tower is controlled at 40°C.

[0010] In one embodiment of the utility model, a motor is provided on the top of the mixer, the output shaft of the motor is connected to a rotating shaft, the rotating shaft extends into the mixer, and a propeller is provided along the shaft of the rotating shaft.

[0011] As described above, the combined dioxane removal device of the utility model has the following beneficial effects:

[0012] 1. The utility model achieves the purpose of removing dioxane from AES again by combining a mixer, a stripping tower and two heat exchangers into an integrated type. Compared with a dispersed structural design, the utility model can reduce the floor space and effectively reduce the cost of installation, construction and pipeline laying.

[0013] 2. The utility model is connected with the vacuum system through the second heat exchanger to increase the removal amount of dioxane and remove dioxane more effectively.

[0014] 3. The utility model can form a swirl of AES and pure water by arranging a propeller in the mixer, accelerate the mixing of the two, and make the mixing of the two more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a schematic structural diagram of a combined dioxane removal device disclosed in an embodiment of the utility model.

[0016] Component number description

[0017] 1. Stripping tower; 11. Upper section; 12. Middle section; 13. Lower section; 14. Discharge port; 2. Mixer; 21. First feed port; 22. Second feed port; 23. Motor; 3. First heat exchanger; 31. Hot water inlet; 32. Hot water outlet; 4. Second heat exchanger; 41. Cooling water inlet; 42. Cooling water outlet. DETAILED DESCRIPTION

[0018] The following specific embodiments illustrate the implementation of the present invention, and those familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0019] See also Figure 1The utility model provides a combined dedioxane device, including a stripping tower 1, a discharge port 14 is provided at the bottom of the stripping tower 1, a first heat exchanger 3 and a second heat exchanger 4 are respectively arranged at the top of the stripping tower 1, a mixer 2 connected to each other is provided at the top of the first heat exchanger 3, and a first feed port 21 and a second feed port 22 are respectively provided at the top of the mixer 2; the top of the second heat exchanger 4 is connected to a vacuum system.

[0020] The utility model achieves the purpose of removing dioxane from AES again by combining the mixer 2, the stripping tower 1 and the two heat exchangers into an integrated structure. Compared with the dispersed structural design, the utility model can reduce the floor space and effectively reduce the cost of installation and construction and pipeline laying. In addition, since the amount of dioxane removed with water vapor under lower pressure is significantly higher than that under normal pressure, the second heat exchanger 4 is connected to the vacuum system to more effectively remove dioxane.

[0021] In one embodiment of the utility model, a hot water outlet 32 ​​is provided at the bottom of the first heat exchanger 3, and a hot water inlet 31 is provided at the top of the first heat exchanger 3. The hot water flow direction of the first heat exchanger 3 is consistent with the feeding direction of the material, so that the material can be preheated more fully.

[0022] In one embodiment of the utility model, a cooling water inlet 41 is provided at the bottom of the second heat exchanger 4, and a cooling water outlet 42 is provided at the top of the second heat exchanger 4. The cooling water flow direction of the second heat exchanger 4 is consistent with the discharge direction of the water vapor, which can more fully cool the water vapor and improve the efficiency of dehydration and removal of dioxane.

[0023] In one embodiment of the utility model, the stripping tower 1 includes an upper section 11, a middle section 12 and a lower section 13, the inner diameter of the upper section 11 gradually expands from top to bottom, the middle section 12 is a straight cylinder section, the inner diameter of the lower section 13 gradually shrinks from top to bottom, and the discharge port 14 is arranged at the bottom of the lower section 13. By setting the middle section 12 as the part with the largest cross-sectional area, the evaporation area can be increased, and the removal efficiency of dioxane and water can be improved.

[0024] Furthermore, the tendency of the inner diameter of the upper section 11 to expand is smaller than the tendency of the inner diameter of the lower section 13 to contract.

[0025] Furthermore, the temperature in the stripping tower 1 is controlled at 40°C.

[0026] In one embodiment of the utility model, a motor 23 is provided on the top of the mixer 2, and the output shaft of the motor 23 is connected to the rotating shaft, the rotating shaft extends into the mixer 2, and a propeller (not shown in the figure) is provided along the shaft of the rotating shaft. Among them, the first feed port 21 is used to introduce AES, and the second feed port 22 is used to introduce pure water. By providing a propeller in the mixer 2, the utility model can make AES and pure water form a vortex, accelerate the mixing of the two, and make the mixing of the two more uniform.

[0027] When in use, AES containing dioxane is introduced from the first feed port 21, and pure water is introduced from the second feed port 22. The two are first mixed evenly in the mixer 2, and then preheated in the first heat exchanger 3 and introduced into the stripping tower 1. Under vacuum conditions, dioxane evaporates with water, and the evaporated vapor phase is cooled by the second heat exchanger 4 and then enters the vacuum system.

[0028] The utility model achieves the purpose of removing dioxane from AES again by combining a mixer, a stripping tower and two heat exchangers into an integrated structure. Compared with a dispersed structural design, the utility model can reduce the floor space and effectively reduce the cost of installation and construction and pipeline laying. The utility model is connected to the vacuum system through the second heat exchanger to increase the removal amount of dioxane and remove dioxane more effectively. Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value.

[0029] Among them, the terms such as "upper", "lower", "left", "right", "front", "back", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0030] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. All equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A combined dedioxane device, characterized in that: It comprises a stripping tower, the bottom of which is provided with a discharge port, the top of which is respectively provided with a first heat exchanger and a second heat exchanger, the top of the first heat exchanger is provided with a connected mixer, the top of the mixer is respectively provided with a first feed port and a second feed port; the top of the second heat exchanger is connected to a vacuum system.

2. A combined dedioxane device according to claim 1, characterized in that: A hot water outlet is provided at the bottom of the first heat exchanger, and a hot water inlet is provided at the top of the first heat exchanger; a cooling water inlet is provided at the bottom of the second heat exchanger, and a cooling water outlet is provided at the top of the second heat exchanger.

3. A combined dedioxane device according to claim 2, characterized in that: The stripping tower comprises an upper section, a middle section and a lower section, the inner diameter of the upper section gradually expands from top to bottom, the middle section is a straight cylinder section, the inner diameter of the lower section gradually shrinks from top to bottom, and the discharge port is arranged at the bottom of the lower section.

4. A combined dedioxane device according to claim 3, characterized in that: The tendency of the inner diameter of the upper section to expand is smaller than the tendency of the inner diameter of the lower section to contract.

5. A combined dedioxane device according to claim 2, characterized in that: The temperature in the stripping tower was controlled at 40°C.

6. A combined dedioxane device according to any one of claims 1 to 5, characterized in that: A motor is arranged on the top of the mixer, the output shaft of the motor is connected with a rotating shaft, the rotating shaft extends into the mixer, and a propeller is arranged along the shaft of the rotating shaft.

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