Glycerin negative pressure rectification device
By lowering the boiling point of glycerol through a negative pressure distillation device, combined with a packed bed and shell-and-tube condenser, the problems of high energy consumption and low efficiency in traditional glycerol distillation are solved, achieving efficient and environmentally friendly glycerol purification, which is suitable for food, pharmaceutical and cosmetic fields.
Patent Information
- Application Number
- CN202520046262.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-01-09
AI Technical Summary
Traditional glycerol distillation methods are energy-intensive, inefficient, cause severe equipment wear and tear, result in serious environmental pollution, and are complex to operate, making it difficult to meet the demand for high-purity production.
A negative pressure distillation unit is used, which reduces the pressure inside the distillation column by a vacuum pump, thereby lowering the boiling point of glycerol. Combined with a packed bed and a shell-and-tube condenser, the heat and mass exchange efficiency is improved, thus achieving low-temperature distillation.
It reduces energy consumption, minimizes harmful emissions, improves production efficiency and purity, lowers production costs, meets environmental protection requirements, and is suitable for high-end market demands.
Smart Images
Figure CN223800085U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of rectifying device, specifically related to glycerol negative pressure rectifying device. BACKGROUND
[0002] In the chemical industry, glycerol as an important chemical raw material, is widely used in food, medicine, cosmetics and many industrial fields. The production of high purity glycerol is essential to improve the quality of downstream products, and the rectification process of glycerol is the key step to achieve this goal. Traditionally, the rectification of glycerol mainly relies on the distillation technology under normal pressure, which can meet the production demand to some extent, but there are many deficiencies, which limit its application efficiency and universality.
[0003] The traditional normal pressure glycerol rectification method relies on high temperature heating to promote glycerol evaporation, and then cools the steam through a condenser to recover liquid glycerol. This process not only consumes a lot of energy, because maintaining high temperature distillation requires a large amount of energy, but also is inefficient, because high temperature conditions limit the rectification speed, resulting in limited overall production capacity. In addition, high temperature operation also aggravates the wear of equipment, shortens the service life of equipment, increases the frequency of repair and replacement, and thus increases the production cost.
[0004] The traditional rectification process is generally accompanied by the generation of a large amount of waste and harmful emissions, which poses a non-negligible threat to the environment, which is contrary to the concept of green low carbon, environmental protection and sustainable development. At the same time, the normal pressure rectification operation is complex, and the professional skill requirement of the operator is high, which is not conducive to the development of automation and intelligentization of production, and increases the risk of human operation error. INVENTION CONTENTS
[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned defects existing in the prior art, and to provide a glycerol negative pressure rectifying device, which reduces the boiling point of glycerol, improves the rectification efficiency and production capacity, and reduces the energy consumption.
[0006] The glycerol negative pressure rectifying device, comprising a rectifying tower, the top of the rectifying tower is connected with a 1# condenser, the 1# condenser is connected with a 2# condenser, and the 2# condenser is connected with a vacuum pump.
[0007] Preferably, the 1# condenser is connected with a glycerol collection tank.
[0008] Preferably, the 2# condenser is connected with a sweet water collection tank.
[0009] Preferably, the rectifying tower is provided with a packing layer inside to promote the heat and mass exchange between glycerol vapor and condensate, and improve the rectification efficiency.
[0010] Preferably, the 1# condenser and the 2# condenser are shell-and-tube condensers, which are internally provided with cooling medium channels for condensing glycerol vapor into liquid state.
[0011] Preferably, the bottom of the rectification tower is connected with the top of the distillation tower.
[0012] Preferably, the bottom of the rectification tower is provided with a heating device for providing heat energy required for rectification.
[0013] Preferably, the connecting pipes among the rectification tower, the 1# condenser, the 2# condenser, the glycerol collection tank and the sweet water collection tank are made of corrosion-resistant and high-temperature-resistant materials to adapt to the chemical and physical conditions in the glycerol rectification process.
[0014] The glycerol negative pressure rectification device, when working, crude glycerol enters the distillation tower to evaporate and is transported to the rectification tower through a pipeline for rectification, steam enters the 1# condenser for condensation, the condensed liquid enters the glycerol collection tank, and the uncondensed steam enters the 2# condenser for condensation, and the condensed liquid enters the sweet water collection tank.
[0015] Compared with the prior art, the utility model has the beneficial effects that:
[0016] The glycerol negative pressure rectification device of the utility model, since the boiling point of glycerol is reduced under negative pressure environment, the rectification process can be carried out at lower temperature, thereby reducing energy consumption. Negative pressure rectification reduces the emission of harmful gases and has less impact on the environment, meeting the current environmental protection requirements. Speed up the rectification speed: the low boiling point under negative pressure environment makes the rectification process speed up, improves the production efficiency. By accurately controlling the negative pressure and temperature, the impurities in glycerol can be separated more effectively, and the purity of the final product is improved. Since the utilization rate of raw materials is improved, material consumption is reduced, thereby reducing production cost. Negative pressure rectification technology can produce glycerol with higher purity to meet the demand of high-end market. Due to the improvement of efficiency, the output per unit time is increased, and the economic benefit is improved. High-purity and low-cost products make enterprises more competitive in the market. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a schematic view of the glycerol negative pressure rectification device of the utility model.
[0018] In the figure: 1, distillation tower; 2, rectification tower; 3, 1# condenser; 4, glycerol collection tank; 5, 2# condenser; 6, sweet water collection tank; 7, vacuum pump; 8, packing layer; 9, heating device. DETAILED DESCRIPTION
[0019] The utility model will be further described below in combination with specific embodiments.
[0020] As Figure 1 The glycerol negative pressure rectification device comprises a rectification tower 2, the top of the rectification tower 2 is connected with a 1# condenser 3, the 1# condenser 3 is connected with a 2# condenser 5, and the 2# condenser 5 is connected with a vacuum pump 7.
[0021] The 1# condenser 3 is connected with a glycerol collecting tank 4.
[0022] The 2# condenser 5 is connected with a sweet water collecting tank 6.
[0023] The rectification tower 2 is internally provided with a filler layer 8, so as to promote heat and mass exchange between glycerol vapor and condensed liquid and improve rectification efficiency.
[0024] The 1# condenser 3 and the 2# condenser 5 are shell-and-tube condensers, internally provided with cooling medium channels, for condensing glycerol vapor into liquid state.
[0025] The bottom of the rectification tower 2 is connected with the top of a distillation tower 1.
[0026] The bottom of the rectification tower 2 is provided with a heating device 9, for providing heat energy required for rectification.
[0027] The connecting pipelines among the rectification tower 2, the 1# condenser 3, the 2# condenser 5, the glycerol collecting tank 4 and the sweet water collecting tank 6 are made of corrosion-resistant and high-temperature-resistant materials, so as to adapt to chemical and physical conditions in the glycerol rectification process.
[0028] The working principle of the utility model is based on the principle of boiling point reduction under negative pressure environment, the pressure in the distillation tower and the rectification tower is reduced through the vacuum pump, so as to reduce the boiling point of glycerol, and high-efficiency rectification at low temperature is realized. Meanwhile, the solution is promoted to be layered through adjusting pH value, and the extraction efficiency is improved.
[0029] Operation steps: crude glycerol firstly enters the distillation tower 1, under the action of the vacuum pump 7, a negative pressure environment is formed in the distillation tower, the boiling point of glycerol is reduced, and preliminary distillation is carried out. The distilled glycerol enters the rectification tower 2 for further rectification, and the rectification tower 2 also maintains negative pressure under the action of the vacuum pump. The rectified glycerol is cooled and condensed through the 1# condenser 3 and is collected in the glycerol collecting tank 4. The tail gas generated in the rectification process is condensed through the 2# condenser 5 and is collected in the sweet water collecting tank 6.
[0030] Of course, the above content is only the preferred embodiment of the utility model, and cannot be considered as limiting the scope of the embodiment of the utility model. The utility model is also not limited to the above examples, and the equal changes and improvements made by the ordinary skilled in the art within the essential scope of the utility model should be attributed to the patent coverage range of the utility model.
Claims
1. A glycerol vacuum pressure rectification apparatus, characterized by: The rectifying tower (2) is connected with a 1# condenser (3), the 1# condenser (3) is connected with a 2# condenser (5), and the 2# condenser (5) is connected with a vacuum pump (7).
2. The apparatus for vacuum pressure glycerol rectification according to claim 1, characterized in that: The 1# condenser (3) is connected with a glycerol collecting tank (4).
3. The apparatus of claim 2, wherein: The 2# condenser (5) is connected with a sweet water collecting tank (6).
4. The apparatus of claim 1, wherein: The rectifying tower (2) is internally provided with a filler layer (8).
5. The apparatus of claim 1, wherein: The 1# condenser (3) and the 2# condenser (5) are shell-and-tube condensers.
6. The apparatus of claim 1, wherein: The bottom of the rectifying tower (2) is connected with the top of a distillation tower (1).
7. The apparatus of claim 1, wherein: The bottom of the rectifying tower (2) is provided with a heating device (9).
8. The apparatus of claim 3, wherein: The connecting pipes among the rectifying tower (2), the 1# condenser (3), the 2# condenser (5), the glycerol collecting tank (4) and the sweet water collecting tank (6) are made of corrosion-resistant and high-temperature-resistant materials.