Triethanolamine refining device
By introducing a method of reflux pipes and valves to adjust the flow rate in the triethanolamine refining device, the problems of steam pressure fluctuations and low yields are solved, and efficient recycling and production stability of triethanolamine are achieved.
Patent Information
- Application Number
- CN202421984772.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-08-15
AI Technical Summary
In the prior art, the steam pressure fluctuates during the evaporation process of triethanolamine and the yield is not high, resulting in waste of resources and reduced device efficiency.
The heavy amine is refluxed to the distillation assembly using a reflux pipeline, the flow rate is adjusted through the valve to stabilize the steam pressure, and the remaining triethanolamine is further refined through the distillation assembly to improve the yield.
It improves the yield of triethanolamine, reduces resource waste, and ensures the stability and efficiency of the production process.
Smart Images
Figure CN223170334U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of chemical production equipment, and more specifically, to a triethanolamine refining device. Background Art
[0002] Ethanolamine is an important derivative of ethylene oxide, which includes three alkanolamine compounds: monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA). It is an important fine organic chemical raw material and is widely used in fields such as gas purification, printing and dyeing, medicine, pesticides, polyurethane, and rubber auxiliaries. It is the most practical product among amino alcohols and is known as the "industrial monosodium glutamate", with its output accounting for about 90% of the total output of amino alcohols. Ethanolamine molecules contain nitrogen atoms and hydroxyl groups, so they have both the chemical properties of amines and alcohols. Ethanolamine is mainly used in fields such as surfactants, pesticides, and polyurethane. Among them, the surfactant and pesticide fields are the largest consumption fields of ethanolamine.
[0003] In the existing ethanolamine device process, ammonia water is generally mixed with refined nitrogen-containing ethylene oxide (EO) and then reacts to produce ethanolamine. The resulting crude ethanolamine often contains monoethanolamine, diethanolamine, triethanolamine, etc., as well as unreacted materials. Then, the crude ethanolamine is further subjected to ammonia distillation, dehydration, and product refining to obtain the product. For example, Zheng Yuanchang discovered a new process for producing ethanolamine, in which a vacuum continuous distillation technology is used to refine the crude ethanolamine: the crude ethanolamine is fed into the middle of the MEA column, and under high vacuum conditions, high-purity MEA is distilled out from the top of the column. The mixed liquid from which MEA has been removed enters the DEA and TEA columns in turn, and finally a refined product is obtained.
[0004] Since TEA is extracted from the medium heated at the bottom of the MEA column, it is inevitable that the evaporation is not complete, and the steam pressure will fluctuate during the production process. In the traditional process design, 99% pure TEA is produced after heating, and the medium remaining after extracting TEA is sold as a product, which causes a certain amount of resource waste and reduces the device yield. Summary of the Utility Model
[0005] (1) Technical Problems to be Solved
[0006] The technical problem to be solved by the utility model is that the steam pressure in the existing evaporation process fluctuates and the yield of triethanolamine in the device is not high.
[0007] (2) Technical Solutions
[0008] To achieve the above object, the technical solution adopted by the utility model is:
[0009] The present utility model provides a triethanolamine refining device, which includes a crude ethanolamine production component, a distillation component, and a reflux pipeline; the crude ethanolamine production component is used for producing crude ethanolamine; the distillation component has a feed inlet, a first discharge outlet, and a second discharge outlet; wherein, the feed inlet is connected to the crude ethanolamine production component, the distillation component is used for heating the crude ethanolamine and distilling triethanolamine from the crude ethanolamine, the first discharge outlet is used for discharging the triethanolamine, and the second discharge outlet is used for discharging the remaining heavy amine; the reflux pipeline connects the second discharge outlet and the feed inlet, and a valve for adjusting the pipeline flow rate is provided on the reflux pipeline.
[0010] Preferably, the crude ethanolamine is one or several mixtures of monoethanolamine, diethanolamine, triethanolamine, and heavy amine.
[0011] Preferably, the valve is a needle core valve.
[0012] Preferably, the triethanolamine refining device further includes a controller and a pressure sensor, the pressure sensor is arranged in the distillation component, and the controller is electrically connected to the pressure sensor and the valve.
[0013] Preferably, the distillation component is a falling film evaporator, a rising film evaporator, or a wiped film evaporator.
[0014] Preferably, the triethanolamine refining device further includes a feed pipeline and a first material pump, the feed pipeline connects the crude ethanolamine production component and the feed inlet, and the first material pump is arranged on the feed pipeline.
[0015] Preferably, the triethanolamine refining device further includes a second material pump, and the second material pump is arranged on the reflux pipeline.
[0016] Preferably, the first discharge outlet is arranged at the upper part of the distillation component, and the second discharge outlet is arranged at the lower part of the distillation component.
[0017] (III) Beneficial effects
[0018] The above technical solutions of the present utility model have at least the following advantages:
[0019] 1. The present utility model can reflux the heavy amine to the distillation component for further refining to obtain the remaining triethanolamine therein, thereby improving the yield of triethanolamine, further increasing the income from product sales, and at the same time reducing the waste of resources.
[0020] 2. The present utility model can reflux the heavy amine to the distillation component, and adjust the amount of the heavy amine flowing into the distillation component through the valve on the reflux pipeline to adjust the stability of the steam pressure in the distillation component, thereby reducing the fluctuation of the steam pressure and ensuring the stability of the entire production process. Description of the drawings
[0021] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can also be obtained based on these drawings.
[0022] Figure 1 It is a schematic structural diagram of a triethanolamine refining device provided by an embodiment of the present utility model.
[0023] The reference numerals in the figure are as follows:
[0024] 1. Crude ethanolamine production component; 2. Distillation component; 3. Return pipeline; 4. Feeding pipeline; 5. First material pump; 6. Second material pump; 21. Inlet; 22. First outlet; 23. Second outlet; 31. Valve. Specific embodiments
[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer, the following further details the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0026] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected or indirectly connected to the other element.
[0027] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model, rather than indicating that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model.
[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating relative importance or indicating the quantity of technical features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined. The following further describes the specific implementation of the present utility model in more detail with reference to specific embodiments:
[0029] As Figure 1As shown in the figure, an embodiment of the present utility model provides a triethanolamine refining device, which includes a crude ethanolamine production component 1, a distillation component 2, and a reflux pipeline 3; the crude ethanolamine production component 1 is used to produce crude ethanolamine; the distillation component 2 has a feed inlet 21, a first discharge outlet 22, and a second discharge outlet 23; wherein, the feed inlet 21 is connected to the crude ethanolamine production component 1, the distillation component 2 is used to heat the crude ethanolamine and distill triethanolamine from the crude ethanolamine, the first discharge outlet 22 is used to discharge triethanolamine, and the second discharge outlet 23 is used to discharge the remaining heavy amine; the reflux pipeline 3 connects the second discharge outlet 23 and the feed inlet 21, and a valve 31 for adjusting the pipeline flow rate is provided on the reflux pipeline 3.
[0030] As an optional implementation manner of this embodiment, the crude ethanolamine is one or a mixture of monoethanolamine, diethanolamine, triethanolamine, and heavy amine.
[0031] As an optional implementation manner of this embodiment, the valve 31 is a needle core valve.
[0032] As an optional implementation manner of this embodiment, the triethanolamine refining device further includes a controller and a pressure sensor. The pressure sensor is arranged inside the distillation component 2, and the controller is electrically connected to the pressure sensor and the valve 31. The pressure sensor is used to detect the steam pressure inside the distillation component 2 and feedback the steam pressure to the controller. The controller adjusts the valve 31 through the steam pressure value, and further adjusts the flow rate of the heavy amine flowing back in the reflux pipeline 3 through the valve 31 to maintain the constancy of the steam pressure and reduce production fluctuations.
[0033] As an optional implementation manner of this embodiment, the distillation component 2 is a falling film evaporator, a rising film evaporator, or a wiped film evaporator.
[0034] As an optional implementation manner of this embodiment, the triethanolamine refining device further includes a feeding pipeline 4 and a first material pump 5. The feeding pipeline 4 connects the crude ethanolamine production component 1 and the feed inlet 21, and the first material pump 5 is arranged on the feeding pipeline 4. The first material pump 5 can pump the crude ethanolamine into the feed inlet 21 to realize the production cycle.
[0035] As an optional implementation manner of this embodiment, the triethanolamine refining device further includes a second material pump 6. The second material pump 6 is arranged on the reflux pipeline 3, and the second material pump 6 is used to pump the heavy amine in the reflux pipeline 3 into the distillation component 2.
[0036] As an optional implementation manner of this embodiment, the first discharge outlet 22 is arranged at the upper part of the distillation component 2, and the second discharge outlet 23 is arranged at the lower part of the distillation component 2.
[0037] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A triethanolamine refining device, characterized in that, Including: A crude ethanolamine production component for producing crude ethanolamine; A distillation component having a feed inlet, a first discharge outlet, and a second discharge outlet; wherein the feed inlet is connected to the crude ethanolamine production component, the distillation component is used to heat the crude ethanolamine and distill triethanolamine from the crude ethanolamine, the first discharge outlet is used to discharge the triethanolamine, and the second discharge outlet is used to discharge the remaining heavy amines; A reflux pipeline connecting the second discharge outlet and the feed inlet, and a valve for adjusting the pipeline flow rate is provided on the reflux pipeline.
2. The triethanolamine refining device according to claim 1, wherein The crude ethanolamine is one or a mixture of monoethanolamine, diethanolamine, triethanolamine, and heavy amines.
3. The triethanolamine refining device according to claim 1, characterized in that, The valve is a needle core valve.
4. The triethanolamine refining device according to claim 1, characterized in that, The triethanolamine refining device further includes a controller and a pressure sensor. The pressure sensor is disposed inside the distillation component, and the controller is electrically connected to the pressure sensor and the valve.
5. The triethanolamine refining device according to claim 1, wherein The distillation component is a falling film evaporator, a rising film evaporator, or a wiped film evaporator.
6. The triethanolamine refining device according to claim 1, characterized in that, The triethanolamine refining device further includes a feed pipeline and a first material pump. The feed pipeline connects the crude ethanolamine production component and the feed inlet, and the first material pump is disposed on the feed pipeline.
7. The triethanolamine refining device according to claim 1, characterized in that, The triethanolamine refining device further includes a second material pump, and the second material pump is disposed on the reflux pipeline.
8. The triethanolamine refining device according to claim 1, characterized in that, The first discharge outlet is disposed at the upper part of the distillation component, and the second discharge outlet is disposed at the lower part of the distillation component.