Improved rectification device
By introducing components such as anti-entrainment dampers, packing modules, liquid removal nets, and reflux balancers into the distillation unit, the problems of gas-liquid entrainment and reflux obstruction in atmospheric distillation have been solved, improving product purity and production efficiency, and ensuring safe production.
Patent Information
- Application Number
- CN202520161405.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-23
AI Technical Summary
In atmospheric distillation, problems such as gas-liquid entrainment, flooding, and reflux obstruction exist, affecting product purity and production efficiency, and existing processes are difficult to solve effectively.
An anti-entrainment damper is installed between the distillation column and the distillation kettle. A packing module and a liquid removal screen are introduced inside the distillation column. A reflux balancer is installed between the condenser and the distillation kettle. An anti-impurity inclined tube is installed before switching to qualified products.
It effectively solves the problems of gas-liquid entrainment and reflux obstruction, ensuring product purity and safe production, and improving production efficiency and product quality.
Smart Images
Figure CN223861337U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of chemical production equipment and distillation purification technology, and specifically relates to an improved distillation device. Background Technology
[0002] Distillation is a separation process that separates components in a mixture by utilizing the differences in volatility and boiling points. Commonly used equipment includes plate distillation columns and packed distillation columns. Distillation typically takes place in a distillation column, where the gas and liquid phases come into countercurrent contact, resulting in interphase heat and mass transfer. The more volatile components in the liquid phase rise into the gas phase, while the less volatile components in the gas phase settle into the liquid phase. Thus, at the top of the column, you obtain the more volatile components with relatively lower boiling points, and at the bottom, you obtain the less volatile components with relatively higher boiling points.
[0003] Several technical problems frequently arise in atmospheric distillation operations, such as gas-liquid entrainment, flooding, reflux obstruction, and contamination of the receiving tank with substandard products, affecting product purity. Gas-liquid entrainment and flooding can rapidly contaminate the entire distillation system with substandard crude products, and cleaning the system requires at least two hours, which is highly detrimental to production efficiency and product quality. Reflux operation is essential in the distillation process, and obstruction poses significant risks to process safety. While these problems can be mitigated by cooling and reducing the distillation rate, they directly impact overall production efficiency, hindering output and cost control. Considering the inseparable relationship between process and equipment in chemical production, problems that cannot be solved by process methods can often be compensated for by innovative equipment improvements. Therefore, it is crucial to effectively improve, refine, and innovate production equipment in conjunction with the distillation process to achieve optimal distillation results. Summary of the Invention
[0004] Based on the purpose of solving the above problems, this utility model discloses an improved distillation device. Its main innovations are: (1) an anti-entrainment damper is installed between the distillation column and the distillation kettle; (2) a packing module and a liquid removal screen are introduced inside the distillation column; (3) a reflux balancer is set between the condenser and the distillation kettle; and (4) an anti-impurity inclined tube is installed before switching to qualified products. This utility model effectively solves the problem of gas-liquid entrainment in the distillation process, solves the problem of obstructed reflux of condensate, and effectively solves the problem that unqualified products may be mixed with qualified products. The improved distillation device described in this utility model also has the advantages of easy packing replacement, convenient operation, safe process flow, high product purity, and high production efficiency.
[0005] The improved distillation apparatus described in this utility model includes: a distillation kettle, a reboiler, a distillation column, an anti-entrainment damper, a packing module, a liquid removal screen, a condenser, a condensate riser, outlet A, outlet B, outlet C, outlet D, a sampling control valve, a reflux control valve, a reflux balancer, a fore-distillate switching valve, a qualified product switching valve, an anti-impurity slant pipe, a fore-distillate receiving tank, and a qualified product receiving tank. The improved distillation apparatus is characterized in that the distillation column is positioned directly above the distillation kettle, and the interior of the distillation kettle... A reboiler is provided, and an anti-entrainment damper is installed between the distillation column and the distillation kettle. The top of the distillation column is connected to the condenser through a pipe. The condensate riser at the bottom of the condenser has four condensate outlets from top to bottom. Outlet A is connected to the sampling control valve, outlet B is connected to the reflux control valve, and the reflux control valve is connected to the distillation kettle through the reflux balancer. Outlet C is connected to the fore-distillate receiving tank through the fore-distillate switching valve, and outlet D is connected to the qualified product receiving tank through the impurity prevention inclined pipe and the qualified product switching valve.
[0006] Preferably, the improved distillation apparatus described in this utility model is characterized in that the reboiler is composed of seamless steam coils with a diameter of 20-25 mm and a heat exchange area of 200-400 m². 2 .
[0007] Preferably, the improved distillation apparatus described in this utility model is characterized in that the anti-entrainment damper is cylindrical, spherical, or ellipsoidal in shape, with a diameter 2.0 to 2.5 times the diameter of the distillation column, and is made of stainless steel or glass enamel. This design aims to slow down some of the crude product droplets rising with the high-speed gas flow after entering the anti-entrainment damper, promoting the separation of the droplets from the gas flow, thereby effectively preventing gas-liquid entrainment. This is highly beneficial for safe production and product quality.
[0008] Preferably, the improved distillation apparatus described in this utility model is characterized in that the packing module is composed of corrugated packing material interwoven and pre-filled within a cylindrical stainless steel mesh, and the mass transfer area of each packing module is 200–300 m³. 2 This design aims to facilitate the addition and replacement of packing material, while also effectively preventing blockages caused by packing material breakage, which is highly beneficial for safe production.
[0009] Preferably, the improved distillation apparatus described in this utility model is characterized in that the liquid removal mesh is composed of 6 to 10 layers of stainless steel wire mesh. This design aims to ensure that the liquid leaving the distillation column and entering the condenser is a gaseous phase, rather than a gas-liquid entrained mixture, which is beneficial for improving product quality.
[0010] Preferably, the improved distillation apparatus described in this utility model is characterized in that the condenser is made of stainless steel or glass-lined material, with a heat exchange area of 100–200 m². 2 .
[0011] Preferably, the improved distillation apparatus described in this utility model is characterized in that the reflux balancer consists of an upper balancer tube, a U-shaped bend, and a lower balancer tube, with the upper balancer tube being 60-80 cm higher than the lower balancer tube. This design aims to ensure that the reflux liquid generates a certain static pressure, thereby smoothly flowing into the distillation vessel with a slight positive pressure, which is beneficial for safe production and quality improvement.
[0012] Preferably, the improved distillation apparatus described in this utility model is characterized in that the angle between the anti-impurity inclined tube and the condensate vertical tube is 30-60°, and the length of the anti-impurity inclined tube is 80-100cm. This design aims to prevent a small amount of defective products from entering the qualified product receiving tank, which is highly beneficial for ensuring the quality of the distilled product.
[0013] The improved distillation apparatus described in this utility model has the following significant benefits: (1) The addition of an anti-entrainment damper between the distillation column and the distillation kettle can effectively prevent gas-liquid entrainment during the distillation process, which is very beneficial to safe production and product quality; (2) The introduction of a packing module inside the distillation column protects the packing itself, facilitates the replacement of the packing, and can also effectively prevent and avoid the phenomenon of local blockage of the distillation column caused by packing breakage; (3) The addition of a liquid removal screen at the top of the distillation column can further prevent liquid materials from leaving the distillation column and entering the condenser and other downstream processes, thereby ensuring product quality; (4) The reflux balancer set between the condenser and the distillation kettle ensures that the condensate in the early stage of distillation flows back to the distillation kettle smoothly, which is beneficial to improving product quality; (5) The design of adding an anti-impurity inclined tube before switching to qualified products can ensure that a small number of unqualified products cannot enter the qualified product receiving tank, which is beneficial to improving product quality. The improved distillation apparatus described in this utility model also has the advantages of safe production process, good product quality, high production efficiency and convenient operation. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0015] Figure 1 This is a schematic plan view of the process flow of an improved distillation apparatus as described in an embodiment of the present invention.
[0016] Figure 1 In the middle section: Distillation vessel 01, Reboiler 02, Steam inlet 21, Drain valve 22, Anti-entrapment damper 03, Distillation column 04, Packing module 05, Liquid removal screen 06, Condenser 07, Cooling water inlet 71, Cooling water outlet 72, Condensate riser 08, Outlet A81, Outlet B82, Outlet C83, Outlet D84, Reflux balancer 09, Reflux control valve 90, Balancer upper pipe 91, Balancer lower pipe 92, Condensate inlet 93, Forward fraction switching valve 10, Forward fraction receiving tank 11, Sampling control valve 12, Anti-impurity inclined pipe 13, Qualified product switching valve 14, Qualified product receiving tank 15, Crude product mixture inlet 16. Detailed Implementation
[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description is provided in conjunction with... Figure 1 The specific embodiments of this implementation will be further described.
[0018] This specific embodiment describes an improved distillation apparatus, comprising: a distillation kettle 01, a reboiler 02, a steam inlet 21, a steam trap 22, an anti-entrapment damper 03, a distillation column 04, a packing module 05, a liquid removal mesh 06, a condenser 07, a cooling water inlet 71, a cooling water outlet 72, a condensate riser 08, an outlet A81, an outlet B82, an outlet C83, an outlet D84, a reflux balancer 09, a reflux control valve 90, an upper balancer pipe 91, a lower balancer pipe 92, a condensate inlet 93, a fore-distillate switching valve 10, a fore-distillate receiving tank 11, a sampling control valve 12, an anti-impurity inclined pipe 13, a qualified product switching valve 14, a qualified product receiving tank 15, and a crude product mixture inlet 16.
[0019] The improved distillation apparatus described in this specific embodiment is characterized in that the distillation column 04 is located directly above the distillation kettle 01, the upper part of the distillation kettle 01 is connected to the crude product mixture inlet 16, the distillation kettle 01 is equipped with a reboiler 02, an anti-entrainment damper 03 is installed between the distillation column 04 and the distillation kettle 01, the top of the distillation column 04 is connected to the condenser 07 through a pipe, the condensate vertical pipe 08 at the bottom of the condenser 07 is provided with 4 condensate outlets from top to bottom, outlet A81 is connected to the sampling control valve 12, outlet B82 is connected to the reflux control valve 90, the reflux control valve 90 is connected to the distillation kettle 01 through the reflux balancer 09, outlet C83 is connected to the front fraction receiving tank 11 through the front fraction switching valve 10, and outlet D84 is connected to the qualified product receiving tank 15 through the anti-impurity inclined pipe 13 and the qualified product switching valve 14.
[0020] Furthermore, the simplified operation flow of the improved distillation apparatus described in this specific embodiment can be described as follows: First, a certain amount of the mixture to be distilled is injected into the distillation vessel 01 through the crude product mixture inlet 16. The reboiler 02 is started, and the crude product mixture vapor flows upward along the distillation column 04 through the anti-entrainment damper 03. After mass exchange through multiple sets of packing modules 05, it passes through the liquid removal screen 06 and enters the condenser 07 through the pipe at the top of the distillation column. After being cooled by the vapor condenser 07, it becomes condensate and flows downward. The condensate first passes through the reflux control valve 9 at the outlet B82 of the condensate vertical pipe 08. The condensate enters the reflux balancer 09. After passing through the static pressure of the reflux balancer 09, the condensate slowly flows into the high-temperature distillation kettle 01. After reflux for 30 minutes, the fore-fraction switching valve 10 is opened and the reflux control valve 90 is closed, allowing the condensate to flow from the outlet C83 into the fore-fraction receiving tank 11. At this time, every 10 minutes, condensate is sampled from the sampling port 12 for testing to determine the purity content. When the purity content of the condensate reaches the qualified product technical indicators, the qualified product switching valve 14 is opened and the fore-fraction switching valve 10 is closed, allowing the qualified condensate to flow into the qualified product receiving tank 15 through the outlet D84 and the anti-impurity inclined tube 13. After the distillation operation of one unit is completed, the unqualified product in the fore-fraction receiving tank is transferred to the distillation kettle for re-distillation purification.
[0021] Furthermore, in this specific embodiment of the improved distillation apparatus, the reboiler is characterized by comprising a seamless steam coil with a diameter of 20-25 mm and a heat exchange area of 200-400 m². 2 .
[0022] Furthermore, in this specific embodiment of the improved distillation apparatus, the anti-entrainment damper is characterized in that its shape is cylindrical, spherical, or ellipsoidal, with a diameter 2.0 to 2.5 times the diameter of the distillation column, and its material is stainless steel or glass-lined. The purpose of this design is to slow down some of the crude product droplets rising with the high-speed gas flow after entering the anti-entrainment damper, promoting the separation of the droplets from the gas flow, thereby effectively preventing gas-liquid entrainment. This is highly beneficial for safe production and product quality.
[0023] Furthermore, in this specific embodiment of the improved distillation apparatus, the packing module is characterized in that it is composed of corrugated packing material interwoven and pre-filled within a cylindrical stainless steel mesh, with each packing module having a mass transfer area of 200–300 m². 2 This design aims to facilitate the addition and replacement of packing material, while also effectively preventing blockages caused by packing material breakage, which is highly beneficial for safe production.
[0024] Furthermore, in this specific embodiment of the improved distillation apparatus, the liquid removal mesh is characterized by being composed of 6 to 10 layers of stainless steel wire mesh. This design aims to ensure that the liquid leaving the distillation column and entering the condenser is a gaseous phase, rather than a gas-liquid entrained mixture, which is beneficial for improving product quality.
[0025] Furthermore, in this specific embodiment of the improved distillation apparatus, the condenser is characterized by being made of stainless steel or glass-lined material, with a heat exchange area of 100–200 m². 2 .
[0026] Furthermore, in this specific embodiment of the improved distillation apparatus, the reflux balancer is characterized by comprising an upper balancer tube, a U-shaped bend, and a lower balancer tube, with the upper balancer tube being 60-80 cm higher than the lower balancer tube. This design aims to ensure that the reflux liquid generates a certain static pressure, thereby smoothly flowing into the distillation vessel with a slight positive pressure, which is beneficial for safe production and quality improvement.
[0027] Furthermore, in this specific embodiment of the improved distillation apparatus, the angle between the anti-impurity inclined tube and the condensate vertical tube is 30–60°, and the length of the anti-impurity inclined tube is 80–100 cm. This design aims to prevent a small amount of defective products from entering the qualified product receiving tank, which is highly beneficial for ensuring the quality of the distilled product.
[0028] The improved distillation apparatus described in this utility model has the following five significant benefits: (1) The addition of an anti-entrainment damper between the distillation column and the distillation kettle can effectively prevent gas-liquid entrainment during the distillation process, which is very beneficial to safe production and product quality; (2) The introduction of a packing module inside the distillation column protects the packing itself, facilitates the replacement of the packing, and can also effectively prevent and avoid local blockage of the distillation column caused by packing breakage; (3) The addition of a liquid removal screen at the top of the distillation column can further prevent the liquid droplets of the material from leaving the distillation column and entering the condenser and other downstream processes, thereby ensuring product quality; (4) The reflux balancer set between the condenser and the distillation kettle ensures that the condensate in the early stage of distillation flows back to the distillation kettle smoothly, which is beneficial to improving product quality; (5) The design of adding an anti-impurity inclined tube before the qualified product switching valve can ensure that even a small amount of unqualified products cannot enter the qualified product receiving tank, which is beneficial to improving product quality.
[0029] The improved distillation apparatus described in this utility model also has the advantages of safe production process, good product quality, high production efficiency and convenient operation.
[0030] Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model shall be included within the protection scope of this utility model. The protection scope of this utility model shall conform to the widest range consistent with the principles and novel features described herein.
Claims
1. An improved distillation apparatus, comprising: The distillation unit comprises a distillation kettle, a reboiler, a distillation column, an anti-entrainment damper, a packing module, a liquid removal screen, a condenser, a condensate riser, outlet A, outlet B, outlet C, outlet D, a sampling control valve, a reflux control valve, a reflux balancer, a fore-distillate switching valve, a qualified product switching valve, an anti-impurity slant pipe, a fore-distillate receiving tank, and a qualified product receiving tank. The distillation column is positioned directly above the distillation kettle, and a reboiler is installed inside the distillation kettle. An anti-entrainment damper is installed between the distillation column and the distillation kettle. The top of the distillation column is connected to the condenser via a pipe. The condensate riser at the bottom of the condenser has four condensate outlets from top to bottom. Outlet A is connected to the sampling control valve, outlet B is connected to the reflux control valve, and the reflux control valve is connected to the distillation kettle via the reflux balancer. Outlet C is connected to the fore-distillate receiving tank via the fore-distillate switching valve, and outlet D is connected to the qualified product receiving tank via the anti-impurity slant pipe and the qualified product switching valve.
2. The improved distillation apparatus according to claim 1, characterized in that, The reboiler consists of seamless steam coils with a diameter of 20-25 mm and a heat exchange area of 200-400 m². 2 .
3. The improved distillation apparatus according to claim 1, characterized in that, The anti-clamping damper is cylindrical, spherical, or ellipsoidal in shape, with a diameter 2.0 to 2.5 times that of the distillation column, and is made of stainless steel or glass enamel.
4. An improved distillation apparatus according to claim 1, characterized in that, The packing module consists of corrugated packing material interwoven and pre-filled within a cylindrical stainless steel mesh. Each packing module has a mass transfer area of 200–300 m². 2 .
5. An improved distillation apparatus according to claim 1, characterized in that, The liquid removal mesh is made of 6 to 10 layers of stainless steel wire mesh.
6. An improved distillation apparatus according to claim 1, characterized in that, The condenser is made of stainless steel or glass-lined material, with a heat exchange area of 100–200 m². 2 .
7. An improved distillation apparatus according to claim 1, characterized in that, The reflux balancer consists of an upper balancer tube, a U-shaped bend, and a lower balancer tube, with the upper balancer tube being 60-80cm higher than the lower balancer tube.
8. An improved distillation apparatus according to claim 1, characterized in that, The angle between the anti-impurity inclined tube and the condensate vertical tube is 30-60°, and the length of the anti-impurity inclined tube is 80-100cm.