Azeotropic distillation device for low-carbon mixed alcohol

Abstract

The utility model discloses an azeotropic distillation device for low-carbon mixed alcohol, which belongs to the technical field of low-carbon mixed alcohol distillation equipment and comprises a distillation component. According to the utility model, when excessive stock solution is remained in the tower body, the stock solution is guided into the overflow through hole, and the overflow through hole adopts an inclined design, so that the overflowing stock solution can be conveniently and quickly guided into the overflow box, and after the stock solution is guided into the overflow box, the weight of the overflow box is increased, and the overflow box moves downwards to pull the pull rod; wherein the top of the pull rod adopts an insection rod design and is meshed with the regulating valve II, so that the pull rod pulls the regulating valve II to rotate, the stock solution inlet amount of the liquid inlet pipe is reduced, and the problems that the liquid amount at the bottom of the tower is too large when the liquid inlet amount is manually regulated to be too large, so that the bottom liquid of the plate tower easily moves slowly and the equipment operation risk is increased are solved; therefore, the stability of the azeotropic distillation device for the low-carbon mixed alcohol in use is effectively improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of low-carbon mixed alcohol distillation equipment, specifically relating to an azeotropic distillation device for low-carbon mixed alcohols. Background Technology

[0002] Low-carbon mixed alcohols are a chemical term that specifically refers to a general term for mixtures mainly composed of alcohols synthesized from coal syngas under the action of a catalyst. These mixtures do not contain aromatic compounds or sulfur and have a wide range of uses, including as alternative fuels, cleaner gasoline additives, and chemical raw materials.

[0003] Since coal-based low-carbon alcohols are typically produced from coal gas to obtain a mixture of low-carbon alcohols containing water, the dehydration of this mixture is a crucial component of coal-based low-carbon alcohol technology. Low-carbon mixed alcohols generally refer to alcohol compounds containing 1 to 5 carbon atoms. Except for methanol, all components of low-carbon mixed alcohols exhibit azeotropic properties with water. Plate distillation is commonly used. However, if the feed rate is artificially increased during plate distillation, it can lead to an excessively large volume of liquid at the bottom of the column. This causes slow liquid movement at the bottom, increasing operational risks and potentially leading to accidents such as bottom liquid fluctuations and leaks. Therefore, an azeotropic distillation device for low-carbon mixed alcohols is needed to address the problem in existing technologies where excessive feed rate leads to an excessively large volume of liquid at the bottom, resulting in slow liquid movement, increased operational risks, and potential accidents such as bottom liquid fluctuations and leaks. Utility Model Content

[0004] The purpose of this invention is to provide an azeotropic distillation apparatus for low-carbon mixed alcohols to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an azeotropic distillation apparatus for low-carbon mixed alcohols, comprising a distillation component, wherein the distillation component is used for distilling low-carbon mixed alcohols, the distillation component is provided with a liquid inlet component for feeding low-carbon mixed alcohols, and an adjustment component for adjusting the feed rate of the liquid inlet component is provided between the liquid inlet component and the distillation component for adjusting the feed rate of the liquid inlet component when the liquid level of the distillation component is too high.

[0006] In a preferred embodiment, the distillation assembly includes a column body for positioning the azeotropic distillation apparatus. A liquid outlet pipe is fixedly installed at the bottom of the column body, an inlet pipe is fixedly connected to the column body above the liquid outlet pipe, a reflux pipe is fixedly installed to the column body above the inlet pipe, an outlet pipe is fixedly connected to the top of the column body, and a plurality of identical trays are fixedly installed to the column body between the reflux pipe and the inlet pipe.

[0007] As a preferred embodiment, the tray adopts an alternating upper and lower design.

[0008] In a preferred embodiment, the liquid inlet assembly includes a liquid inlet pipe fixedly installed on the tower body, a regulating valve one fixedly installed on the liquid inlet pipe, and a regulating valve two fixedly connected to the liquid inlet pipe on the outside of the regulating valve one.

[0009] In a preferred embodiment, the height of the inlet pipe is between the two trays in the middle, the regulating wheel of the regulating valve is provided with toothed grooves, and an overflow hole is provided on the tower body, with the overflow hole being designed at an angle.

[0010] In a preferred embodiment, the regulating assembly includes an overflow box for storing overflow disposed on the outside of the tower body. A spring hose is fixedly installed at the inlet of the overflow box. A pull rod is fixedly installed on the outside of the overflow box. A fixing bracket fixedly installed on the tower body is slidably connected to the outside of the pull rod. A spring hose is fixedly installed at the outlet of the overflow box. A fixing pipe is fixedly installed at the outlet of the spring hose. The fixing pipe is fixedly connected to the tower body. The outlet of the fixing pipe is connected to the liquid outlet pipe.

[0011] In a preferred embodiment, the inlet of the spring hose is connected to the overflow outlet of the tower body.

[0012] Compared with the prior art, the azeotropic distillation apparatus for low-carbon mixed alcohols provided by this utility model has at least the following beneficial effects:

[0013] In this invention, when the user uses the azeotropic distillation apparatus for low-carbon mixed alcohols, the low-carbon mixed alcohol stock solution can be introduced into the inlet pipe. After introduction, the stock solution flows into the inlet pipe and onto the trays. The trays adopt a staggered design, and overflow side plates are installed around the perimeter of each tray. This allows some stock solution to remain in the trays before flowing down to the next tray. After the stock solution is introduced, the external reboiler can be opened, allowing vapor to be introduced into the column body to perform azeotropic treatment on the stock solution on the trays. After azeotropic treatment, the alcohol in the low-carbon mixed alcohol is vaporized, while the water is retained and introduced into the reboiler for reuse. After the vaporized alcohol is discharged through the outlet pipe, it is cooled by a heat exchanger, and some impurities are returned to the column body through the reflux pipe for secondary distillation. The raw liquid is cooled by a heat exchanger and then introduced into the collector. When too much raw liquid remains in the column, it is introduced into the overflow orifice, which is designed with an inclination to facilitate the rapid flow of overflowing raw liquid into the overflow tank. After the raw liquid enters the overflow tank, the weight of the overflow tank increases, causing it to move downward and pull the lever. The top of the lever has a toothed design that meshes with the regulating valve, causing the lever to pull the regulating valve to rotate. This reduces the amount of raw liquid entering through the inlet pipe, thus preventing excessive liquid volume at the bottom of the column if the inlet flow is manually adjusted. This avoids slow liquid movement at the bottom of the plate column, which increases the risk of equipment operation and may even cause liquid fluctuations or leaks at the bottom of the column. This effectively improves the stability of the azeotropic distillation unit for low-carbon mixed alcohols. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 For the present utility model Figure 1 A schematic diagram of the partial structure (view from the front);

[0016] Figure 3 For the present utility model Figure 2 Schematic diagram of the rear view section;

[0017] Figure 4 For the present utility model Figure 3 Schematic diagram of part of the overflow box structure;

[0018] Figure 5 For the present utility model Figure 4 Schematic diagram of the cross-sectional structure at the fixing frame.

[0019] In the diagram: 1. Distillation assembly; 41. Column body; 42. Liquid outlet pipe; 43. Gas inlet pipe; 44. Reflux pipe; 45. Gas outlet pipe; 46. Tray; 2. Liquid inlet assembly; 21. Liquid inlet pipe; 22. Regulating valve one; 23. Regulating valve two; 3. Regulating assembly; 31. Overflow box; 32. Spring hose one; 33. Pull rod; 34. Fixing bracket; 35. Spring hose two; 36. Fixing pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments.

[0021] To make the objectives, technical solutions, and advantages of the present utility model embodiments clearer, the technical solutions of the present utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0023] Example

[0024] Since coal-based low-carbon alcohols are usually produced from coal gas to obtain a mixture of low-carbon alcohols containing water, the dehydration of the low-carbon alcohol mixture is an important part of the coal-based low-carbon alcohol technology. Low-carbon mixed alcohols usually refer to alcohol compounds containing 1 to 5 carbon atoms. Except for methanol, all components of low-carbon mixed alcohols exhibit azeotropic properties with water. Plate towers are commonly used. When using plate towers, if the feed rate is artificially increased, it will lead to an excessive amount of liquid at the bottom of the tower. This makes the liquid at the bottom of the plate tower prone to slow movement, increasing the risk of equipment operation and potentially causing accidents such as liquid fluctuations and leaks at the bottom of the tower.

[0025] For this purpose, please refer to Figure 1-5This utility model provides an azeotropic distillation apparatus for low-carbon mixed alcohols, including a distillation component 1 for distilling low-carbon mixed alcohols. The distillation component 1 is equipped with a liquid inlet component 2 for feeding the low-carbon mixed alcohols. An adjustment component 3 is provided between the liquid inlet component 2 and the distillation component 1 to adjust the feed rate of the liquid inlet component 2 when the liquid level in the distillation component 1 is too high. When the user uses this azeotropic distillation apparatus for low-carbon mixed alcohols, the low-carbon mixed alcohol stock solution can be introduced into the liquid inlet pipe 21. After introduction, the liquid flows into the liquid inlet pipe 21. This allows the low-carbon mixed alcohol concentrate to be introduced onto tray 46, which employs a staggered design and is equipped with overflow side plates around its perimeter. This ensures that after some concentrate remains in tray 46, it continues to flow to the next tray 46. Once the concentrate has been introduced, the external reboiler can be opened, allowing vapor to be introduced into the column body 41. This azeotropically treats the concentrate on tray 46. After azeotropic treatment, the low-carbon mixed alcohol vaporizes, while the water remains and is reused in the reboiler. After being discharged through the outlet pipe 45, the liquid is cooled by a heat exchanger. Some impurities are then returned to the column body 41 through the reflux pipe 44 for secondary distillation. The distilled liquid is cooled by the heat exchanger and introduced into the collector. When too much liquid remains in the column body 41, it is introduced into the overflow orifice. The overflow orifice is designed with an incline to facilitate the rapid flow of overflowing liquid into the overflow tank 31. When the liquid enters the overflow tank 31, the weight of the overflow tank 31 increases, causing it to move downwards. The pull rod 33 has a toothed design at the top that meshes with the regulating valve 23. This causes the pull rod 33 to pull the regulating valve 23 to rotate, thereby reducing the amount of raw liquid entering the inlet pipe 21. This prevents excessive liquid volume at the bottom of the column from being caused by manual adjustment of the liquid flow rate. Such excessive liquid flow at the bottom of the plate column can lead to slow liquid movement, increasing the risk of equipment operation and potentially causing liquid fluctuations or leaks at the bottom of the column. This effectively improves the stability of the azeotropic distillation unit for low-carbon mixed alcohols during use.

[0026] Further as Figure 1-2 As shown, it is worth noting that, in order to achieve better distillation effect in column 41, the distillation assembly 1 includes a column 41 for positioning the azeotropic distillation device. A liquid outlet pipe 42 is fixedly installed at the bottom of column 41, and an inlet pipe 43 is fixedly connected to column 41 above the liquid outlet pipe 42. A reflux pipe 44 is fixedly installed to column 41 above the inlet pipe 43, and an outlet pipe 45 is fixedly connected to the top of column 41. Multiple identical trays 46 are fixedly installed to column 41 between the reflux pipe 44 and the inlet pipe 43. The middle tray 46 adopts a staggered design, and overflow side plates are installed around the perimeter of each tray 46. This allows the liquid to remain in the tray 46 and then continue to flow down to the next tray 46, thus facilitating the azeotropic effect of gas from bottom to top.

[0027] The tray 46 adopts an alternating design, which allows the overflow of the top tray 46 to be effectively intercepted and stored in the next tray 46. This process is repeated to achieve a better azeotropic effect.

[0028] Further as Figure 2-4 As shown, it is worth noting that in order to ensure effective liquid intake through the inlet pipe 21, the liquid intake assembly 2 is provided, which includes an inlet pipe 21 fixedly installed on the tower body 41. A regulating valve 22 is fixedly installed on the inlet pipe 21, and a regulating valve 23 is fixedly connected to the inlet pipe 21 on the outside of the regulating valve 22. The regulating valve 22 is manually adjusted, and the regulating valve 23 is engaged with the pull rod 33. When the regulating valve 23 is in its original position, the inlet pipe 21 is in a liquid-flowing state.

[0029] The height of the inlet pipe 21 is between the two trays 46 in the middle. The regulating wheel of the regulating valve 23 is provided with toothed grooves. An overflow hole is opened on the tower body 41. The overflow hole adopts an inclined design. The rotation force of the regulating valve 23 is greater than the weight of the overflow box 31. When the raw liquid is introduced into the overflow box 31 and its weight is increased, the overflow box 31 moves down, which pulls the regulating valve 23 to rotate, thereby reducing the liquid inlet of the inlet pipe 21.

[0030] Further as Figure 1-5 As shown, it is worth noting that, in order to facilitate the grinding roller 33 to grind building templates of different lengths using the aforementioned reciprocating transmission structure, the adjustment component 3 is provided, including an overflow box 31 for storing overflow installed on the outside of the tower body 41. A spring hose 32 is fixedly installed at the inlet of the overflow box 31, a pull rod 33 is fixedly installed on the outside of the overflow box 31, and a fixing bracket 34 fixedly installed on the tower body 41 is slidably connected to the outside of the pull rod 33. A spring hose 35 is fixedly installed at the outlet of the overflow box 31, and a fixing pipe 36 is fixedly installed at the outlet of the spring hose 35. The fixing pipe 36 is fixedly connected to the tower body 41, and the outlet of the fixing pipe 36 is connected to the liquid outlet pipe 42. Both the spring hose 35 and the spring hose 32 are made of flexible hose, which allows the overflow box 31 to effectively extend and deform the spring hose 32, and effectively contract and deform the spring hose 35.

[0031] The inlet of the spring hose 32 is connected to the overflow outlet of the tower body 41. The overflow passage is designed with an inclination, which facilitates the rapid introduction of the overflowing raw liquid into the overflow tank 31. After the raw liquid is introduced into the overflow tank 31, the weight of the overflow tank 31 increases, which causes the overflow tank 31 to move down and pull the pull rod 33.

[0032] In summary: When using this azeotropic distillation apparatus for low-carbon mixed alcohols, the low-carbon mixed alcohol raw liquid can be introduced into the inlet pipe 21. After introduction, the liquid flows into the inlet pipe 21, and then into the tray 46. The tray 46 adopts a staggered design, and overflow side plates are installed around the perimeter of each tray 46. This allows some raw liquid to remain in the tray 46 before flowing down to the next tray 46. After the raw liquid is introduced, the external reboiler can be opened, allowing vapor to be introduced into the column body 41 to perform azeotropic treatment on the raw liquid in the tray 46. After azeotropic treatment, the alcohol in the low-carbon mixed alcohol is vaporized, while the water is retained and introduced into the reboiler for reuse. After the vaporized alcohol is discharged through the outlet pipe 45, it is cooled by the heat exchanger, and some impurities are returned to the column body 41 through the reflux pipe 44 for secondary distillation. The raw liquid is cooled by a heat exchanger and introduced into the collector. When too much raw liquid remains in the column body 41, it is introduced into the overflow orifice. The overflow orifice is designed with an inclination to facilitate the rapid introduction of the overflowing raw liquid into the overflow tank 31. After the raw liquid enters the overflow tank 31, the weight of the overflow tank 31 increases, causing the overflow tank 31 to move downward and pull the lever 33. The top of the lever 33 has a toothed design that meshes with the regulating valve 23, causing the lever 33 to pull the regulating valve 23 to rotate. This reduces the amount of raw liquid entering the inlet pipe 21, thus avoiding excessive liquid volume at the bottom of the column if the liquid volume is manually adjusted too much. This would prevent the plate column from experiencing slow liquid movement at the bottom, increasing the risk of equipment operation and potentially causing accidents such as liquid fluctuations and leaks at the bottom of the column. This effectively improves the stability of the azeotropic distillation unit for low-carbon mixed alcohols during use.

[0033] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by a person skilled in the art to which this utility model pertains. The words "comprising" or "including" and similar terms used in this utility model mean that the element or object preceding the word covers the element or object listed after the word and its equivalents, without excluding other elements or objects. The words "connected" or "linked" and similar terms are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An azeotropic distillation apparatus for low-carbon mixed alcohols, comprising a distillation unit (1), characterized in that, The distillation assembly (1) is used for the distillation of low-carbon mixed alcohols. The distillation assembly (1) is provided with a liquid inlet assembly (2) for feeding low-carbon mixed alcohols. An adjustment assembly (3) for adjusting the feed rate of the liquid inlet assembly (2) is provided between the liquid inlet assembly (2) and the distillation assembly (1) to adjust the feed rate of the liquid inlet assembly (2) when the liquid level of the distillation assembly (1) is too high. The adjustment assembly (3) includes an overflow tank (31) for storing overflows provided on the outside of the column body (41). A spring hose (3) is fixedly installed at the inlet of the overflow tank (31). 2) A tie rod (33) is fixedly installed on the outside of the overflow box (31). A fixed bracket (34) is slidably connected to the outside of the tie rod (33) and fixedly installed on the tower body (41). A spring hose II (35) is fixedly installed at the outlet of the overflow box (31). A fixed pipe (36) is fixedly installed at the outlet of the spring hose II (35). The fixed pipe (36) is fixedly connected to the tower body (41). The outlet of the fixed pipe (36) is connected to the liquid outlet pipe (42).

2. The azeotropic distillation apparatus for low-carbon mixed alcohols according to claim 1, characterized in that: The distillation assembly (1) includes a column body (41) for positioning the azeotropic distillation apparatus. A liquid outlet pipe (42) is fixedly installed at the bottom of the column body (41). An air inlet pipe (43) is fixedly connected to the column body (41) above the liquid outlet pipe (42). A reflux pipe (44) is fixedly installed on the column body (41) above the air inlet pipe (43). An air outlet pipe (45) is fixedly connected to the top of the column body (41). Multiple trays (46) of the same size are fixedly installed on the column body (41) between the reflux pipe (44) and the air inlet pipe (43).

3. The azeotropic distillation apparatus for low-carbon mixed alcohols according to claim 2, characterized in that: The tray (46) adopts an alternating design.

4. The azeotropic distillation apparatus for low-carbon mixed alcohols according to claim 1, characterized in that: The liquid inlet assembly (2) includes a liquid inlet pipe (21) fixedly installed on the tower body (41), a regulating valve one (22) fixedly installed on the liquid inlet pipe (21), and a regulating valve two (23) fixedly connected to the liquid inlet pipe (21) on the outside of the regulating valve one (22).

5. The azeotropic distillation apparatus for low-carbon mixed alcohols according to claim 4, characterized in that: The height of the inlet pipe (21) is between the two trays (46) in the middle. The regulating wheel of the regulating valve (23) is provided with toothed grooves. An overflow hole is provided on the tower body (41), and the overflow hole adopts an inclined design.

6. The azeotropic distillation apparatus for low-carbon mixed alcohols according to claim 5, characterized in that: The inlet of the spring hose (32) is connected to the overflow outlet of the tower body (41).

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