Rectification device for furfural production
By combining the preheating and stirring heating components, the problem of low raw material processing efficiency in the distillation unit for furfural production was solved, achieving uniform preheating and efficient separation, improving product purity and production stability, and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHIJIAZHUANG GAOCHENG DISTRICT KANGFENG CHEM CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-05-12
AI Technical Summary
Existing distillation units for furfural production are inefficient in terms of raw material processing. Centralized heating leads to excessive evaporation or insufficient separation of some components, resulting in serious energy waste and affecting product purity and equipment lifespan.
The design employs a combination of preheating components, stirring heating components, and exhaust components. Uniform preheating is achieved through an inner shroud, a first heating tube, an inlet pipe, and a dispersion hole. The central shaft, spiral blades, and second heating tube increase the heat contact area. The air inlet, inner pipe, and spiral impeller ensure timely extraction of steam, thus synergistically improving distillation efficiency and product quality.
It achieves uniform preheating and efficient separation of raw materials, reduces energy waste, improves the purity and production stability of furfural, and extends equipment life.
Smart Images
Figure CN224220768U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the technical field of furfural production, and more specifically, to a distillation apparatus for furfural production. Background Technology
[0002] Furfural, as an important chemical raw material, is widely used in petroleum, chemical, and pharmaceutical fields. Distillation is a crucial step in furfural production, aiming to obtain high-purity furfural from the reaction products through separation and purification. However, existing furfural production distillation units suffer from numerous operational problems, severely impacting production efficiency and product quality.
[0003] Currently, most distillation units used in furfural production suffer from deficiencies in raw material handling, with centralized feeding and simultaneous heating of raw materials resulting in low efficiency. In actual production, the reaction products are complex, containing furfural, water, and other impurities. When these raw materials are fed into the distillation unit, the significant differences in boiling points among the components make it difficult to ensure optimal evaporation and separation conditions for each component during simultaneous heating. For example, furfural has a boiling point of approximately 161.7°C, while water boils at 100°C, and other impurities also have varying boiling points. During centralized heating, low-boiling-point components may over-evaporate, while high-boiling-point furfural may not be fully separated, leading to low distillation efficiency and difficulty in guaranteeing product purity.
[0004] Furthermore, centralized heating easily leads to energy waste. To ensure all raw materials reach their evaporation temperature, a large amount of heat energy is often required, some of which is excessively absorbed by low-boiling-point components, leaving relatively insufficient energy for furfural separation. This not only increases production costs but also imposes an additional burden on the environment. Simultaneously, this heating method can also affect the lifespan of the distillation unit, as localized overheating can cause damage and corrosion to equipment components.
[0005] With the increasing market demand for furfural and the ever-rising requirements for product quality, it is imperative to develop a distillation unit for furfural production that can optimize raw material heating methods and improve distillation efficiency. This will help reduce production costs, improve product quality, enhance the market competitiveness of enterprises, and promote the sustainable development of the furfural industry. Utility Model Content
[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a distillation apparatus for furfural production, which solves the technical problem in the prior art that in order to make all raw materials reach the evaporation temperature, a large amount of heat energy is often required and the heating efficiency is low.
[0007] According to one aspect, at least one embodiment of the present disclosure provides a distillation apparatus for furfural production, characterized in that it comprises:
[0008] The housing and the heat exchange and purification equipment are arranged on the top of the housing;
[0009] A preheating assembly, wherein the preheating assembly is disposed inside the housing;
[0010] An inner pipe and an exhaust assembly, wherein the inner pipe is disposed inside the outer casing and the exhaust assembly is disposed on the inner pipe and the outer casing;
[0011] A stirring and heating assembly, wherein the stirring and heating assembly is disposed inside the housing;
[0012] The preheating assembly includes an inner cover, which is fixed to one end of the top of the outer shell. Several first heating tubes are installed inside the outer wall of the outer shell. An inlet pipe is provided on one side of the outer shell, which is connected to the inside of the inner cover. A dispersion hole is provided at the bottom of the inner cover.
[0013] As a further technical solution, the stirring and heating assembly includes a central shaft, which is rotatably connected inside the outer shell. A drive motor is provided on one side of the outer shell, and the output end of the drive motor is connected to the central shaft.
[0014] As a further technical solution, spiral blades are provided at both ends of the central shaft, several fixed rods are provided on the inner wall of the outer shell, and distillation packing is fixedly connected between the fixed rods. The distillation packing is rotatably fitted outside the central shaft, and several sets of second heating tubes are fixedly connected inside the outer shell.
[0015] As a further technical solution, the exhaust assembly includes a plurality of air inlets, which are evenly distributed on the side end face of the inner pipe. One end of the inner pipe is located outside the outer casing, and a second motor is provided at one end of the inner pipe.
[0016] As a further technical solution, a spiral impeller is provided at the output end of the second motor. The spiral impeller is located in the inner pipe. A connecting pipe is provided at the top of one end of the inner pipe. One end of the connecting pipe is connected to the air inlet of the heat exchange and purification equipment.
[0017] As a further technical solution, the helical directions of the pair of helical blades are opposite.
[0018] As a further technical solution, the outer shell surface where the first heating tube is installed is inclined, and the inner cover is located at the highest point of the inclined portion of the outer shell.
[0019] As a further technical solution, several groups of the second heating tubes are evenly distributed in a ring shape around the periphery of the central axis.
[0020] The beneficial effects of the embodiments disclosed herein are as follows:
[0021] 1. In this disclosure, the beneficial effect of the preheating component is that the inner cover, the first heating tube, the inlet tube, and the dispersion hole work together. The inlet tube introduces the raw material, the first heating tube provides heat, and the raw material flows out through the dispersion hole to achieve uniform preheating. The inclined outer shell structure and the inner cover located at a high position enable the raw material to be dispersed and flow over a wide range, resulting in more uniform and efficient heating. This not only improves the efficiency of subsequent distillation but also avoids the problem of excessive evaporation or insufficient separation of some components caused by concentrated heating, laying the foundation for obtaining high-purity furfural products.
[0022] 2. In this disclosure, the beneficial effects of the stirring and heating assembly are that the drive motor drives the central shaft and spiral blades to rotate, so that furfural is evenly distributed, increasing the contact area with heat. The distillation packing provides a mass and heat transfer surface, improving the distillation effect. The annularly distributed second heating tube, in conjunction with the liquid flow direction, ensures that furfural is distilled at a suitable temperature. Through the synergistic effect of stirring and heating, the distillation efficiency and product quality of furfural are improved, and energy waste is reduced.
[0023] 3. In this disclosure, the beneficial effect of the exhaust assembly is that the air inlet, inner pipe, second motor, spiral impeller and connecting pipe cooperate with each other. The spiral impeller rotates to generate suction, and the steam is extracted in time through the air inlet. The connecting pipe transports the steam to the heat exchange and purification equipment for treatment, maintaining the internal pressure balance and a good reaction environment of the device. This ensures the smooth progress of the furfural distillation process, realizes the efficient operation of the entire production process, and improves the stability and continuity of production. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0025] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure;
[0026] Figure 2 This is an isometric drawing of the present disclosure;
[0027] Figure 3 This is an isometric sectional view of the present disclosure;
[0028] Figure 4 This is another isometric sectional view of this disclosure;
[0029] In the diagram: 1. Outer shell; 2. Heat exchange and purification equipment; 3. Inner pipe; 4. Preheating assembly; 4-1. Inner cover; 4-2. First heating tube; 4-3. Inlet pipe; 4-4. Dispersion hole; 5. Stirring and heating assembly; 5-1. Central shaft; 5-2. Drive motor; 5-3. Spiral blade; 5-4. Fixing rod; 5-5. Distillation packing; 5-6. Second heating tube; 6. Exhaust assembly; 6-1. Air inlet; 6-2. Second motor; 6-3. Spiral impeller; 6-4. Connecting pipe. Detailed Implementation
[0030] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0031] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0033] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0034] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.
[0035] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0036] like Figures 1-4 The diagram illustrates a distillation apparatus for furfural production according to an embodiment of this disclosure, comprising:
[0037] The outer casing 1 and the heat exchange and purification device 2 are disposed on the top of the outer casing 1;
[0038] Preheating component 4, which is disposed inside the outer casing 1;
[0039] The inner pipe 3 and the exhaust assembly 6 are provided. The inner pipe 3 is disposed inside the outer casing 1, and the exhaust assembly 6 is disposed on the inner pipe 3 and the outer casing 1.
[0040] A stirring and heating assembly 5 is disposed inside the outer casing 1;
[0041] The preheating component 4 includes an inner cover 4-1, which is fixed to one end of the top of the outer shell 1. Several first heating tubes 4-2 are installed inside the outer wall of the outer shell 1. An inlet pipe 4-3 is provided on one side of the outer shell 1, which is connected to the inside of the inner cover 4-1. A dispersion hole 4-4 is provided at the bottom of the inner cover 4-1.
[0042] In some examples, in the distillation process of furfural production, a preheating assembly 4 is designed to uniformly preheat the furfural feedstock before it enters the outer shell 1 for distillation, thereby improving the subsequent distillation efficiency. This assembly includes an inner cover 4-1 fixed to one end of the top of the outer shell 1, providing an entry space for the furfural. Several first heating tubes 4-2 installed inside the outer wall of the outer shell 1 generate heat, providing a heat source for the preheating process. An inlet pipe 4-3 on one side of the outer shell 1 is connected to the inside of the inner cover 4-1 and is used to introduce the furfural feedstock into the inner cover 4-1. When the furfural feedstock enters through the inlet pipe 4-3... After the inner cover 4-1, the furfural will flow out from the dispersion hole 4-4 at the bottom of the inner cover 4-1 and enter the outer shell 1 evenly in a flowing manner. During this process, the heat generated by the first heating tube 4-2 heats the furfural that flows in dispersedly, so that the furfural reaches a suitable preheating temperature before entering the distillation stage, achieving uniform preheating and laying a good foundation for subsequent distillation operations. Through the coordinated work of components such as the inner cover 4-1, the first heating tube 4-2, the inlet tube 4-3, and the dispersion hole 4-4, the preheating component 4 can effectively disperse the furfural into the outer shell 1 and perform uniform preheating treatment.
[0043] like Figures 1-4 As shown in the figure, the stirring and heating assembly 5 in this embodiment includes a central shaft 5-1, which is rotatably connected inside the outer shell 1. A drive motor 5-2 is provided on one side of the outer shell 1, and the output end of the drive motor 5-2 is connected to the central shaft 5-1. Spiral blades 5-3 are provided at both ends of the central shaft 5-1. Several fixing rods 5-4 are provided on the inner wall of the outer shell 1. Distillation packing 5-5 is fixedly connected between the fixing rods 5-4. The distillation packing 5-5 is rotatably fitted outside the central shaft 5-1. Several sets of second heating tubes 5-6 are fixedly connected inside the outer shell 1.
[0044] In some examples, during the distillation production of furfural, a stirring and heating assembly 5 is designed to achieve efficient distillation heating. This assembly includes a central shaft 5-1 rotatably connected inside the outer shell 1. A drive motor 5-2, located on one side of the outer shell 1, has its output connected to the central shaft 5-1, providing power for the stirring and distillation process. When the drive motor 5-2 starts, it drives the central shaft 5-1 to rotate, causing the spiral blades 5-3 at both ends of the central shaft 5-1 to rotate accordingly. This agitates the furfural, ensuring its uniform distribution within the outer shell 1, increasing the contact area between the furfural and heat, and promoting the distillation reaction. Several fixing rods 5-4 are located on the inner wall of the outer shell 1. The distillation packing 5-5, which is fixedly connected to the central shaft 5-1, is rotatably mounted on the outside of the central shaft 5-1. The distillation packing 5-5 provides sufficient mass and heat transfer surface for the distillation of furfural, which helps to improve the distillation effect. At the same time, several sets of second heating tubes 5-6, which are fixedly connected inside the outer shell 1, can provide the heat required for distillation, ensuring that furfural undergoes distillation reaction at a suitable temperature. Through the coordinated work of the central shaft 5-1, drive motor 5-2, spiral blades 5-3, fixed rod 5-4, distillation packing 5-5, and second heating tubes 5-6, the stirring and heating assembly 5 can perform distillation heating treatment on furfural by stirring, thereby improving the distillation efficiency and product quality of furfural.
[0045] like Figures 1-4 As shown in the figure, the exhaust assembly 6 in this embodiment includes a plurality of air inlets 6-1, which are evenly distributed on the side end face of the inner pipe 3. One end of the inner pipe 3 is located outside the outer shell 1. A second motor 6-2 is provided at one end of the inner pipe 3. A spiral impeller 6-3 is provided at the output end of the second motor 6-2. The spiral impeller 6-3 is located in the inner pipe 3. A connecting pipe 6-4 is provided at the top of one end of the inner pipe 3. One end of the connecting pipe 6-4 is connected to the air inlet of the heat exchange and purification device 2.
[0046] In some examples, during furfural distillation, an exhaust assembly 6 is designed to promptly extract and quickly discharge the generated vapor, maintaining pressure balance and a favorable reaction environment within the distillation unit. This assembly includes several air inlets 6-1 evenly distributed on the side end face of the inner pipe 3. These air inlets 6-1 are used to draw in the vapor generated during distillation. One end of the inner pipe 3 is located outside the outer casing 1, and the output end of the second motor 6-2 at this end is connected to a spiral impeller 6-3 located in the inner pipe 3. When the second motor 6-2 starts, it drives the spiral impeller 6-3 to rotate. The rotation of the spiral impeller 6-3 generates suction, drawing the vapor through... Steam is drawn into the inner pipe 3 through the air inlet 6-1. A connecting pipe 6-4 is installed at the top of one end of the inner pipe 3, and one end of the connecting pipe 6-4 is connected to the air inlet of the heat exchange and purification equipment 2. The steam drawn into the inner pipe 3 is transported to the heat exchange and purification equipment 2 for treatment through the connecting pipe 6-4. Through the coordinated work of components such as the air inlet 6-1, the inner pipe 3, the second motor 6-2, the spiral impeller 6-3, and the connecting pipe 6-4, the exhaust assembly 6 can effectively extract the steam generated during the distillation process and quickly discharge it, ensuring the smooth progress of the furfural distillation process. At the same time, the steam is transported to subsequent equipment for proper treatment, realizing the efficient operation of the entire production process.
[0047] For example, such as Figure 4 As shown, the helical directions of the pair of helical blades 5-3 are opposite.
[0048] In some examples, by moving the spiral blades 5-3 in the opposite direction, the liquid can be pushed towards the distillation packing 5-5, thereby accelerating heating and distillation.
[0049] For example, such as Figure 3 As shown, the surface of the outer shell 1 where the first heating tube 4-2 is installed is inclined, and the inner cover 4-1 is located at the highest point of the inclined portion of the outer shell 1.
[0050] In some examples, by tilting the structural surface to create a landslide effect, the incoming liquid can be dispersed and flow over a wide area, resulting in higher heating efficiency and more uniform distribution.
[0051] For example, such as Figure 3 As shown, several groups of the second heating tubes 5-6 are evenly distributed in a ring around the periphery of the central axis 5-1.
[0052] In some examples, the annular structure can be used to match the direction of liquid flow to improve the heating effect.
[0053] In actual use: furfural raw material enters the inner cover 4-1 of the preheating component 4 through the inlet pipe 4-3. The first heating pipe 4-2 heats the raw material in the inner cover 4-1. The raw material is dispersed and flows out from the dispersion hole 4-4 at the bottom of the inner cover 4-1 into the outer shell 1. Preheating is carried out during the flow. The drive motor 5-2 is started, which drives the central shaft 5-1 of the stirring and heating component 5 to rotate. The spiral blade 5-3 stirs the raw material. The second heating pipe 5-6 provides the heat required for distillation. The distillation packing 5-5 promotes the distillation reaction. During the distillation process, the second motor 6-2 of the exhaust component 6 drives the spiral impeller 6-3 to rotate. The generated steam is drawn into the inner pipe 3 through the air inlet 6-1 and then transported to the heat exchange and purification equipment 2 for treatment through the connecting pipe 6-4.
[0054] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A distillation apparatus for furfural production, characterized in that, include: The outer casing (1) and the heat exchange and purification device (2) are disposed on the top of the outer casing (1); A preheating assembly (4) is disposed inside the outer casing (1); An inner pipe (3) and an exhaust assembly (6) are provided inside the outer casing (1), and the exhaust assembly (6) is provided on the inner pipe (3) and the outer casing (1); A stirring and heating assembly (5) is disposed inside the outer casing (1); The preheating component (4) includes an inner cover (4-1), which is fixed to one end of the top of the outer shell (1). Several first heating tubes (4-2) are installed inside the outer wall of the outer shell (1). An inlet tube (4-3) is provided on one side of the outer shell (1), which is connected to the inside of the inner cover (4-1). A dispersion hole (4-4) is provided at the bottom of the inner cover (4-1).
2. The distillation apparatus for furfural production according to claim 1, characterized in that, The stirring and heating assembly (5) includes a central shaft (5-1), which is rotatably connected inside the outer shell (1). A drive motor (5-2) is provided on one side of the outer shell (1), and the output end of the drive motor (5-2) is connected to the central shaft (5-1).
3. A distillation apparatus for furfural production according to claim 2, characterized in that, Both ends of the central shaft (5-1) are provided with spiral blades (5-3). The inner wall of the outer shell (1) is provided with several fixing rods (5-4). Distillation packing (5-5) is fixedly connected between the fixing rods (5-4). The distillation packing (5-5) is rotatably fitted outside the central shaft (5-1). Several sets of second heating tubes (5-6) are fixedly connected inside the outer shell (1).
4. A distillation apparatus for furfural production according to claim 1, characterized in that, The exhaust assembly (6) includes several air inlets (6-1), which are evenly distributed on the side end face of the inner pipe (3). One end of the inner pipe (3) is located outside the outer shell (1), and a second motor (6-2) is provided at one end of the inner pipe (3).
5. A distillation apparatus for furfural production according to claim 4, characterized in that, The output end of the second motor (6-2) is provided with a spiral impeller (6-3), which is located in the inner pipe (3). A connecting pipe (6-4) is provided at the top of one end of the inner pipe (3), and one end of the connecting pipe (6-4) is connected to the air inlet of the heat exchange and purification equipment (2).
6. A distillation apparatus for furfural production according to claim 3, characterized in that, The helical directions of the pair of helical blades (5-3) are opposite.
7. A distillation apparatus for furfural production according to claim 1, characterized in that, The surface of the outer shell (1) on which the first heating tube (4-2) is installed is inclined, and the inner cover (4-1) is located at the highest point of the inclined portion of the outer shell (1).
8. A distillation apparatus for furfural production according to claim 3, characterized in that, Several groups of the second heating tubes (5-6) are evenly distributed in a ring around the periphery of the central axis (5-1).