A cooling device for methylglyoxal oxidation reaction and a cooling method thereof

Abstract

This invention discloses a cooling device and method for the oxidation reaction of acetone aldehyde, relating to the field of energy-saving refrigeration technology. The cooling device includes a cooling cylinder with an air inlet at its lower side, an air outlet at its top, and a liquid outlet at its bottom. A cooling pipe is fixedly connected inside the cooling cylinder via at least one support frame. The cooling pipe includes circumferentially distributed branch pipes. A bidirectional screw is rotatably connected to the center of the cooling cylinder. A wind turbine blade is rotatably connected to the side of the cooling cylinder near the air outlet. The wind turbine blade is fixedly connected to the bidirectional screw, which is threadedly connected to a scraper. This invention uses a high-speed flowing acetone aldehyde airflow to drive the wind turbine blade, thereby driving the scraper to move up and down. This automatically scrapes off the condensed acetone aldehyde liquid on the outer wall of the cooling pipe and the inner wall of the cooling cylinder during the cooling process, preventing condensation failure due to acetone aldehyde liquid adhering to the pipe wall.

Description

Technical Field

[0001] This invention relates to the field of energy-saving refrigeration technology, and in particular to a cooling device and cooling method for the oxidation reaction of acetone aldehydes. Background Technology

[0002] Pyronealdehyde, also known as methylglyoxal, is a simple α-ketal aldehyde that is widely distributed in nature and plays an important role in various industrial and biochemical processes. It can be synthesized via the propylene glycol method, specifically by vaporizing propylene glycol and water at high temperature, followed by an oxidation reaction under the action of a catalyst to produce pyronealdehyde gas. The gas is then collected via a condensation system.

[0003] The core structure of a conventional condensation system is a fixed tubular channel assembly. Efficient heat transfer is achieved by guiding the reaction heat stream and the cooling medium to different sides of the tubular channel, contacting the channel walls. This design enhances heat transfer efficiency through zoned contact between the medium and the channel walls, while reducing energy consumption by optimizing fluid distribution and minimizing thermal resistance. It ensures stable heat removal from the reaction process, balancing process temperature control requirements with energy conservation. However, the large amount of condensed acetone aldehyde liquid adhering to the cooling tube walls can lead to cooling failure. Summary of the Invention

[0004] To overcome the drawback that a large amount of condensed acetone aldehyde liquid adheres to the cooling pipe wall, which may lead to cooling failure, the present invention provides a cooling device and cooling method for the oxidation reaction of acetone aldehyde.

[0005] A cooling device for the oxidation reaction of acetone aldehydes includes a cooling cylinder with an air inlet on its lower side, an air outlet at the top, and a liquid outlet at the bottom. A cooling pipe is fixed inside the cooling cylinder by at least one support frame. The cooling pipe includes circumferentially distributed branch pipes. A bidirectional screw is rotatably connected to the center of the cooling cylinder. A conversion groove is provided on both sides of the bidirectional screw. A wind turbine blade is rotatably connected to the side of the cooling cylinder near the air outlet. The wind turbine blade is fixed to the bidirectional screw. A scraper is threadedly connected to the bidirectional screw. The scraper includes an outer ring and several circumferentially distributed inner rings. Each inner ring of the scraper is respectively fitted onto the outer wall of each branch pipe of the cooling pipe. The outer ring of the scraper contacts the inner wall of the cooling cylinder. Liquid guiding slopes are provided on the upper and lower sides of both the inner and outer rings of the scraper.

[0006] To further explain, it also includes a duct, which is fixed inside the cooling cylinder on the side near the air inlet. The duct is connected to the air inlet. A fan blade is fixed to the side of the bidirectional screw near the duct. The inner end face of the duct near the fan blade is set as the air dissipation surface. An air guide slope is set at the bottom of the fan blade.

[0007] To further explain, the guide slope is designed as a frustum shape.

[0008] To further explain, the guide tube has a drain outlet located directly below the fan blade.

[0009] To further explain, it also includes circumferentially distributed racks, each rack being fixed to the outer wall of each branch pipe of the cooling pipe, and the scraper is equipped with springs corresponding to the racks, with the springs contacting the corresponding racks.

[0010] To further explain, the spring is V-shaped, and the inclined surface of the spring fits perfectly with the toothed surface of the rack, so that the spring and the rack are pressed together when the spring moves.

[0011] To further explain, it also includes a baffle, which is fixedly connected to the scraper, and the baffle partially surrounds the bidirectional screw.

[0012] To further explain, a cooling method for the acetone aldehyde oxidation reaction includes the following steps: S1: Coolant circulates into the cooling pipe through the inlet and circulates out through the outlet of the cooling pipe; S2: Acetone aldehyde gas is circulated into the cooling cylinder through the air inlet and then circulated out through the air outlet. S3: The wind turbine blades are driven to rotate by the airflow, which drives the bidirectional screw to rotate, thereby causing the scraper to move up and down to scrape off the acetone aldehyde liquid condensed on the outer wall of the cooling pipe and discharge it from the outlet.

[0013] The present invention has the following advantages: The present invention drives the wind turbine blades through a high-speed flow of acetone aldehyde airflow, thereby driving the scraper to move up and down. It can automatically scrape off the acetone aldehyde liquid condensed on the outer wall of the cooling pipe and the inner wall of the cooling cylinder during the cooling process, avoiding condensation failure caused by acetone aldehyde liquid adhering to the pipe wall.

[0014] This invention efficiently utilizes the kinetic energy of airflow to provide driving force, which is not only energy-saving and environmentally friendly, but also eliminates the need to consider the internal corrosion of driving parts compared to other electrical component driving methods. Only corrosion-resistant materials need to be sprayed on the outside of the parts, resulting in relatively low maintenance costs.

[0015] This invention provides liquid guiding slopes on the upper and lower sides of the scraper, so that the scraped acetone aldehyde liquid is guided away from the cooling pipe wall and the inner wall of the cooling cylinder along the liquid guiding slopes during the up and down movement of the scraper, preventing the scraped acetone aldehyde liquid from remaining on the cooling pipe wall and the inner wall of the cooling cylinder and being pushed up and down when the scraper moves up and down.

[0016] This invention utilizes the combined action of the fan blades and their air-diffusing surfaces, along with the guide slope of the duct, to ensure uniform diffusion of acetone aldehyde gas, thereby improving the uniform distribution of acetone aldehyde gas around the cooling pipe and guaranteeing uniform cooling. Simultaneously, it utilizes auxiliary wind turbine blades to drive the bidirectional screw to rotate.

[0017] This invention utilizes a scraper to drive a spring to intermittently strike a rack. The rack transmits the vibration to the cooling pipe, loosening the coolant scale on the inner wall of the cooling pipe and shaking off the acetone aldehyde liquid in the dead corners that the upper and lower scrapers cannot reach, thus increasing the removal range.

[0018] This invention prevents excessive liquid from splashing into the threaded groove of the bidirectional screw when the scraper is scraping liquid, thus affecting the movement of the scraper, by setting a baffle. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, such as the cooling cylinder, cooling pipe, and support frame.

[0021] Figure 3 This is a three-dimensional structural diagram of the components of the present invention, including the cooling pipe, the bidirectional screw, and the scraper.

[0022] Figure 4 This is a three-dimensional structural diagram of the scraper frame of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the wind turbine blades, ducts, and fan blades of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the conduit and fan blade of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the cooling pipe, scraper, rack, and spring sheet of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the scraper, rack, and spring of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the cooling pipe, bidirectional screw, scraper, and baffle of the present invention.

[0028] The above-mentioned attached drawings include the following reference numerals: 1. Cooling cylinder, 101. Air inlet, 102. Air outlet, 103. Liquid outlet, 2. Cooling pipe, 3. Support frame, 4. Bidirectional screw, 401. Conversion groove, 5. Wind turbine blade, 6. Scraper, 601. Liquid guide slope, 7. Pipe, 8. Fan blade, 801. Air diffuser surface, 802. Air guide slope, 803. Liquid outlet, 9. Rack, 10. Spring, 11. Baffle. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: A cooling device for the oxidation reaction of acetone aldehydes, such as Figures 1-4 As shown, the device includes a cooling cylinder 1. The lower side of the cooling cylinder 1 has an air inlet 101 for introducing acetone aldehyde gas, the top of the cooling cylinder 1 has an air outlet 102 for discharging acetone aldehyde gas, and the bottom of the cooling cylinder 1 has a liquid outlet 103. A cooling pipe 2 is fixedly connected inside the cooling cylinder 1 via two upper and lower support frames 3. The cooling pipe 2 includes six circumferentially distributed branch pipes. The inlet of the cooling pipe 2 is located on the upper left side, and the outlet is located on the lower left side. A bidirectional screw 4 is rotatably connected in the middle of the cooling cylinder 1. The bidirectional screw 4 has [missing information - likely related to a device or structure] on both its upper and lower sides. There is a conversion groove 401. The side of the cooling cylinder 1 near the air outlet 102 is connected to the wind turbine blade 5 through a bearing, which makes the wind turbine blade 5 easier to rotate. The wind turbine blade 5 is fixed to the bidirectional screw 4. The bidirectional screw 4 is threadedly connected to the scraper 6. The scraper 6 includes an outer ring and six circumferentially distributed inner rings. Each inner ring of the scraper 6 is respectively fitted on the outer wall of each branch pipe of the cooling pipe 2. The outer ring of the scraper 6 is in contact with the inner wall of the cooling cylinder 1. Liquid guiding slopes 601 are provided on the upper and lower sides of the inner and outer rings of the scraper 6.

[0031] Coolant enters through the inlet of cooling pipe 2 and exits through the outlet of cooling pipe 2, thus achieving coolant circulation. The acetone aldehyde gas synthesized by the oxidation reaction enters the cooling cylinder 1 at high speed through the air inlet 101 and is then discharged through the air outlet 102. During this process, the coolant in cooling pipe 2 condenses the acetone aldehyde gas passing through the cooling cylinder 1. The condensed acetone aldehyde liquid is discharged through the liquid outlet 103. At the same time, when the high-speed flowing acetone aldehyde gas is discharged from the air outlet 102, it drives the wind turbine blades 5 to rotate, thereby driving the bidirectional screw 4 to rotate, causing the scraper 6 to move downward. When the scraper 6 moves downward to the conversion slot 401, it moves upward. In this way, the up and down movement of the scraper 6 can automatically scrape off the acetone aldehyde liquid condensed on the outer wall of cooling pipe 2 and the inner wall of cooling cylinder 1 during the cooling process, avoiding condensation failure due to acetone aldehyde liquid adhering to the pipe wall.

[0032] In particular, the present invention drives the wind turbine blades 5 and thus the scraper 6 by using a high-speed flow of acetone aldehyde airflow. On the one hand, this method can efficiently utilize the kinetic energy of the airflow, saving energy and protecting the environment. On the other hand, since acetone aldehyde contains carbonyl and aldehyde groups, it has high reactivity and can easily participate in various reactions such as oxidation, reduction, and addition. If acetone aldehyde penetrates into the interior of electrical components, it may undergo oxidation-reduction reactions with the internal metals, leading to gradual internal corrosion. Therefore, compared with other methods of driving electrical components, relying on the wind turbine blades 5 for driving eliminates the need to consider the problem of internal corrosion. Only corrosion-resistant materials need to be sprayed on the outside of the components, resulting in relatively low maintenance costs for the parts.

[0033] Specifically, the present invention provides liquid guiding slopes 601 on the upper and lower sides of the scraper 6, so that the scraped acetone aldehyde liquid is guided away from the outer wall of the cooling pipe 2 and the inner wall of the cooling cylinder 1 along the liquid guiding slopes 601 during the up and down movement of the scraper 6, preventing the scraped acetone aldehyde liquid from remaining on the outer wall of the cooling pipe 2 and the inner wall of the cooling cylinder 1 and being pushed up and down when the scraper 6 moves up and down.

[0034] like Figures 5-6 As shown, it also includes a conduit 7, which is fixed inside the cooling cylinder 1 on the side near the air inlet 101. The conduit 7 is connected to the air inlet 101. A fan blade 8 is fixed to the side of the bidirectional screw 4 near the conduit 7. The inner end face of the conduit 7 near the fan blade 8 is set as a diffuser surface 801. A guide slope 802 is set at the bottom of the fan blade 8. The guide slope 802 is set as a frustum shape with a larger top and a smaller bottom. A drain port 803 is opened on the side of the conduit 7 near the liquid outlet 103. The drain port 803 is located directly below the fan blade 8.

[0035] The acetone aldehyde gas entering through the air inlet 101 is guided by the duct 7 and directed to the fan blade 8. With the combined action of the fan blade 8, its air distribution surface 801, and the guide slope 802 of the duct 7, the acetone aldehyde gas diffuses evenly, improving the uniform distribution of the acetone aldehyde gas around the cooling pipe 2 and ensuring the uniformity of cooling. At the same time, the fan blade 8 is driven by the acetone aldehyde gas, which can assist the wind turbine blade 5 in driving the bidirectional screw 4 to rotate. In addition, the acetone aldehyde liquid condensed on the duct 7 and the fan blade 8 is guided to the liquid outlet 103 through the drain port 803 and discharged.

[0036] Example 2: Based on Example 1, such as Figures 7-8 As shown, it also includes six circumferentially distributed racks 9, each rack 9 being fixed to the outer wall of each branch pipe of the cooling pipe 2. The scraper 6 is provided with a spring piece 10 corresponding to the rack 9. The spring piece 10 is set in a V shape, and the inclined surface of the spring piece 10 is just in contact with the tooth surface of the rack 9, so that the spring piece 10 is pressed and engaged with the rack 9 when it moves up and down.

[0037] During the up-and-down movement of the scraper 6, the spring 10 moves up and down synchronously. During this process, the rack 9 intermittently squeezes the spring 10 through the inclined tooth surface to deform it. The spring 10 then intermittently resets and strikes the rack 9. The rack 9 transmits the vibration to the cooling pipe 2, loosening the coolant scale on the inner wall of the cooling pipe 2 and shaking off the acetone aldehyde liquid in the dead corner area that the scraper 6 on both sides cannot reach, thus increasing the removal range.

[0038] like Figure 9 As shown, it also includes a baffle 11, which is fixedly connected to the scraper 6, and the baffle 11 partially surrounds the bidirectional screw 4.

[0039] The scraper 6 moves up and down, causing the baffle 11 to move up and down as well, preventing excessive liquid from splashing into the threaded groove of the bidirectional screw 4 when the scraper 6 scrapes the liquid, thus affecting the movement of the scraper 6.

[0040] Example 3: Based on Example 2, a cooling method for the acetone aldehyde oxidation reaction includes the following steps: S1: Coolant circulates into the cooling pipe 2 through the inlet and circulates out through the outlet of the cooling pipe 2; S2: Acetone aldehyde gas is circulated into the cooling cylinder 1 through the air inlet 101 and then circulated out through the air outlet 102. S3: The wind turbine blades 5 are driven to rotate by the airflow, which drives the bidirectional screw 4 to rotate, thereby driving the scraper 6 to move up and down to scrape off the acetone aldehyde liquid condensed on the outer wall of the cooling pipe 2, so that it is discharged from the outlet 103.

[0041] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A cooling device for the oxidation reaction of acetone aldehydes, comprising a cooling cylinder (1), an air inlet (101) on the lower side of the cooling cylinder (1), an air outlet (102) at the top of the cooling cylinder (1), a liquid outlet (103) at the bottom of the cooling cylinder (1), and a cooling pipe (2) fixedly connected inside the cooling cylinder (1) by at least one support frame (3), the cooling pipe (2) including circumferentially distributed branch pipes, characterized in that: A bidirectional screw (4) is rotatably connected in the middle of the cooling cylinder (1). A conversion groove (401) is provided on both sides of the bidirectional screw (4). A wind turbine blade (5) is rotatably connected to the side of the cooling cylinder (1) near the air outlet (102). The wind turbine blade (5) is fixedly connected to the bidirectional screw (4). A scraper (6) is threadedly connected to the bidirectional screw (4). The scraper (6) includes an outer ring and several circumferentially distributed inner rings. Each inner ring of the scraper (6) is respectively fitted on the outer wall of each branch pipe of the cooling pipe (2). The outer ring of the scraper (6) is in contact with the inner wall of the cooling cylinder (1). Liquid guiding slopes (601) are provided on the upper and lower sides of the inner and outer rings of the scraper (6).

2. The cooling device for the oxidation reaction of acetone aldehydes according to claim 1, characterized in that: It also includes a duct (7), which is fixed to the side of the cooling cylinder (1) near the air inlet (101). The duct (7) is connected to the air inlet (101). A fan blade (8) is fixed to the side of the bidirectional screw (4) near the duct (7). The inner end face of the duct (7) near the fan blade (8) is set as a diffuser (801). A guide slope (802) is set at the bottom of the fan blade (8).

3. A cooling device for the oxidation reaction of acetone aldehydes according to claim 2, characterized in that: The guide slope (802) is set as a frustum shape.

4. A cooling device for the oxidation reaction of acetone aldehydes according to claim 3, characterized in that: The conduit (7) has a drain port (803) located directly below the fan blade (8).

5. A cooling device for the oxidation reaction of acetone aldehydes according to claim 4, characterized in that: It also includes circumferentially distributed racks (9), each rack (9) is fixed to the outer wall of each branch pipe of the cooling pipe (2), and the scraper (6) is provided with a spring (10) corresponding to the rack (9), and the spring (10) contacts the corresponding rack (9).

6. A cooling device for the oxidation reaction of acetone aldehydes according to claim 5, characterized in that: The spring (10) is set to V-shape, and the inclined surface of the spring (10) fits perfectly with the tooth surface of the rack (9), so that the spring (10) is pressed and engaged with the rack (9) when it moves.

7. A cooling device for the oxidation reaction of acetone aldehydes according to claim 6, characterized in that: It also includes a baffle (11), which is fixedly connected to the scraper (6), and the baffle (11) partially surrounds the bidirectional screw (4).

8. A cooling method for the oxidation reaction of acetone aldehydes, applied to any of the cooling apparatuses for the oxidation reaction of acetone aldehydes as described in claims 1-7, characterized in that: A cooling method for the oxidation reaction of acetone aldehydes includes the following steps: S1: Coolant circulates into the cooling pipe (2) through the inlet and flows out through the outlet of the cooling pipe (2); S2: Acetone aldehyde gas is circulated into the cooling cylinder (1) through the air inlet (101) and then circulated out through the air outlet (102); S3: The wind turbine blades (5) are driven to rotate by the airflow, which drives the bidirectional screw (4) to rotate, thereby driving the scraper (6) to move up and down to scrape off the acetone aldehyde liquid condensed on the outer wall of the cooling pipe (2) and discharge it from the outlet (103).

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