Light reaction device with cold trap
By designing a photoreaction device with a cold trap structure and using double-layer quartz glass and a cooling system, the problem of reaction heat management in photocatalytic reactions was solved, large-scale, efficient, continuous production and precise temperature control were achieved, and the reaction efficiency and product quality were improved.
Patent Information
- Application Number
- CN202323656243.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-31
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2033-12-31
AI Technical Summary
Existing photocatalytic reaction devices have the problem of reaction heat not being effectively utilized and dissipated in large-scale production, resulting in reduced reaction efficiency and deterioration in product quality. In addition, traditional devices have complex structures and low single-set production capacity, making it difficult to achieve large-scale continuous production.
A photoreaction device with a cold trap structure was designed. It adopted a double-layer quartz glass reactor and a light source placement slot, combined with water cooling and air cooling systems to achieve precise temperature control and heat management. The temperature gradient was adjusted through an independent cooling cavity and temperature control medium to avoid temperature fluctuations.
It achieves large-scale, efficient and continuous production, improves reaction selectivity and yield, extends the life of the light source, reduces maintenance costs, and ensures the stability of the device and production reliability.
Smart Images
Figure CN223324519U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of chemical engineering, and in particular relates to a photoreaction device with a cold trap. Background Art
[0002] Currently, production-scale photocatalytic reactions primarily utilize glass reactors and tower reactors. Glass reactors offer the advantages of a simple structure, easy observation of the reaction process, and the ability to perform continuous reactions, making them suitable for small- to medium-scale production. However, glass reactors have the disadvantages of requiring numerous reaction tubes and occupying a large floor space. Furthermore, due to the poor thermal insulation of glass, reaction heat is difficult to dissipate promptly, limiting the production capacity of a single reactor. Tower reactors offer higher conversion rates, but are limited to batch reactions and unsuitable for large-scale continuous production.
[0003] Both of these traditional reactors have significant drawbacks in production-scale photocatalytic reaction applications: The reaction heat generated by glass reactors cannot be effectively utilized and dissipated, affecting reaction efficiency and reducing product quality. Furthermore, the piping system is complex, the equipment is bulky, and the production capacity of a single unit is low. While tower reactors offer high conversion rates, their intermittent operation limits batch production and fails to address the problem of insufficient production capacity. Furthermore, as the reaction scale expands, the photothermal effect and reaction heat increase significantly, posing a significant challenge to controlling the reaction temperature. Sharp temperature fluctuations during the reaction can lead to decreased yields and poor selectivity. Therefore, the current development direction is to adopt continuous processes and expand the production capacity of a single unit. Effectively handling the excess photothermal and reaction heat and achieving precise temperature control are key to ensuring efficient reactions. This requires the development of new photoreaction devices to meet the needs of large-scale, efficient production.
[0004] To achieve large-scale continuous production of chemical products, adopting continuous processes and expanding the processing capacity of single equipment are imperatives. As reaction scale continues to expand, the photothermal effect and reaction exotherm increase dramatically, posing significant challenges to temperature control and significantly reducing reaction efficiency. Therefore, developing a photoreaction device capable of efficient cooling and precise temperature control to achieve large-scale, efficient, continuous production is imperative.
[0005] To maximize the amount of photothermal and reaction heat generated by the long-term operation of the light source, protect the light source's lifespan, and achieve precise temperature control during the photocatalytic reaction, this utility model has designed a photoreaction device with a cooling chamber structure. Both the reactant chamber and the cavity housing the light source utilize a double-layer quartz glass design, fully accommodating a temperature-control medium such as liquid or gas. This allows for precise temperature regulation and enables efficient photocatalytic reactions under optimal temperature conditions. The double-layer glass structure enhances the isolation and cooling of reaction heat. The temperature-control medium effectively absorbs both photothermal and reaction heat, ensuring that the reactants are precisely maintained at the set temperature and preventing the negative effects of temperature fluctuations on the reaction. Summary of the Invention
[0006] In view of the various deficiencies in the above-mentioned prior art, the purpose of this application is to provide a photoreaction device with a cold trap, which is used to solve the problems in the prior art that the reaction heat generated by the glass reactor cannot be effectively utilized and dissipated, affecting the reaction efficiency and reducing product quality.
[0007] To achieve the above-mentioned purpose or other related purposes, the present application provides a photoreaction device with a cold trap, comprising a photoreactor having a first cold trap structure and a columnar light source placement slot having a second cold trap structure; the internal space of the columnar light source placement slot located in the inner layer of the first cold trap structure is used to place the columnar light source, the columnar light source placement slot is detachably connected to the mating port at the upper end of the photoreactor and extends into the internal space of the photoreactor, and the photoreaction space in the photoreactor between the columnar light source placement slot and the first cold trap structure is used to introduce the reaction material. The photoreactor and the columnar light source placement slot are made of quartz glass, which has high light transmittance and can withstand high temperature, high pressure and chemical corrosion during large-scale photocatalytic reactions. The temperature control medium introduced into the two cold traps can have a large temperature difference, so that the reaction fluid in the reaction chamber has a certain temperature gradient.
[0008] In certain embodiments provided herein, the inner layer of the mating opening at the upper end of the photoreactor and the outer layer of the columnar light source placement slot in contact with the inner layer are both provided with frosted surfaces, which enable mating and sealing between the two.
[0009] In certain embodiments provided in the present application, the joint between the columnar light source placement slot and the photoreactor is fixed by a flange, and the outer surface where the photoreactor and the flange are joined is set to a conical surface, which can effectively prevent the joint from breaking due to mechanical vibration during the high-temperature and high-pressure chemical reaction process.
[0010] In certain embodiments provided in the present application, the second cold trap structure is composed of a space enclosed by two layers of quartz glass located inside and outside the tube body of the columnar light source placement groove, and the top of the columnar light source placement groove is provided with a first water inlet and a first water outlet connected to the enclosed space.
[0011] In certain embodiments provided herein, the photoreactor further comprises: a feed port for placing reaction materials, wherein the feed port is disposed at an upper portion of the photoreactor and communicates with the reaction space.
[0012] In certain embodiments provided herein, the photoreactor further comprises an aeration port for admitting gas, located at the top of the photoreactor and connected to the reaction space. An aeration device connected to the aeration port allows the liquid in the reaction chamber to contact air for oxygenation. The aeration device also agitates the liquid, accelerating the transfer of oxygen from the air into the liquid, thereby achieving oxygenation. Furthermore, the aeration device prevents the suspended matter in the tank from sinking and enhances contact between the chemical substances in the reaction chamber and dissolved oxygen, thereby ensuring that the chemical substances in the reaction chamber are in sufficient dissolved oxygen to oxidize and decompose organic matter.
[0013] In certain embodiments provided herein, the first cold trap structure is composed of a space enclosed by two layers of quartz glass located inside and outside the body of the photoreactor, and the photoreactor is provided with a second water inlet and a second water outlet connected to the enclosed space.
[0014] Certain embodiments provided herein further include: a light source device adapted to engage with the top portion of the columnar light source placement slot; the light source device comprises a columnar light source extending into the columnar light source placement slot, and a control assembly located on top of the columnar light source and adapted to engage with the opening at the top portion of the columnar light source placement slot. Providing a built-in columnar light source to the reaction fluid in the photoreactor facilitates uniform illumination, avoids blind spots, and ensures a more complete reaction.
[0015] In certain embodiments provided herein, the control component includes:
[0016] An air cooling device, comprising an air inlet and an air outlet provided in the control assembly, for connecting to the columnar light source placement slot to cool the air of the columnar light source; and / or
[0017] The water cooling device includes a third water inlet and a third water outlet arranged in the control component, which is used to be connected to the columnar light source placement groove and allow cooling water to flow in for cooling.
[0018] Among them, the water cooling device can introduce cooling water through the water inlet and outlet of the T-shaped pipe for cooling. At the same time, the thermal effect generated by the light emission will heat the air around the light source. The air cooling device can effectively discharge the hot air and let in cold air through the third air inlet and the third air outlet on the columnar light source placement slot, thereby protecting the light source from damage.
[0019] In certain embodiments provided in the present application, the types of the columnar light sources include: LED lamps and mercury lamps.
[0020] Beneficial effects of the utility model:
[0021] 1. The photoreaction device has a simple and rational structure and adopts continuous flow operation, which greatly improves the continuity of the reaction process, enabling large-scale continuous production and significantly enhancing production capacity. At the same time, the photoreactor and column light source cavity are both made of quartz glass, which has high light transmittance and pressure and corrosion resistance. The reaction process can be directly observed, and operation and maintenance are very convenient.
[0022] 2. Both the photoreactor and the light source chamber are equipped with independent cooling chambers, allowing for flexible adjustment of the flow and temperature of the temperature-control medium as needed, enabling precise temperature control during the reaction process. The temperature difference between the cooling chambers creates a temperature gradient, which is beneficial for heat-sensitive reactions. Accurate temperature control can significantly improve reaction selectivity and yield.
[0023] 3. The light source cavity and the reactor are connected by a flange with a tapered design, which can effectively resist mechanical vibration under high temperature and high pressure conditions, ensuring long-term safe and stable operation of the device. This is especially important for continuous production.
[0024] 4. The light source cavity is equipped with a water-cooling and air-cooling composite cooling structure, which can fully take away the large amount of heat generated during the operation of the light source, effectively extend the service life of the light source and reduce maintenance costs.
[0025] 5. The device integrates functions such as light source, reactor, and precise temperature control. It has a high degree of systematization and a high level of automated operation. It can achieve precise control of reaction conditions, greatly reduce the probability of reaction oscillation and product quality fluctuations, and greatly improve production reliability and stability.
[0026] 6. The modular design with pre-installed light source makes light source replacement quick and easy. The appropriate light source can be selected according to different reaction requirements, and has a wide range of applications. The high degree of modularity of the device is conducive to subsequent modification and upgrading. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 Schematic diagram of the light reaction device of the present invention.
[0029] Figure 2 A cross-sectional view of the control assembly. DETAILED DESCRIPTION
[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0032] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "installed," "connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.
[0033] In order to solve the technical problems in the prior art that the reaction heat generated by the glass reactor cannot be effectively utilized and dissipated, affecting the reaction efficiency and reducing the product quality, a photoreaction device with a cold trap came into being.
[0034] Figure 1 The schematic diagram of the light reaction device of the utility model is shown. Figure 2 A cross-sectional view of the control assembly is shown.
[0035] See details Figure 1 The light reaction device with a cold trap of the present invention includes a light reactor 2 with a first cold trap structure 1 and a columnar light source placement groove 4 with a second cold trap structure 3; the internal space of the columnar light source placement groove 4 located in the inner layer of the first cold trap structure 1 is used to place the columnar light source, and the columnar light source placement groove 4 is detachably connected to the matching opening at the upper end of the light reactor 2 and extends into the internal space of the light reactor 2; the light reaction space 5 in the light reactor 2 located between the columnar light source placement groove 4 and the first cold trap structure 1 is used to introduce the reaction material.
[0036] Among them, the columnar light source placement slot 4 is a blind tube structure, and the top opening and the middle part of the columnar light source placement slot 4 are used to place the columnar light source. The photoreactor 2 is can-shaped, and the outer layer is made of the second cold trap structure 3. The space located in the inner layer of the second cold trap structure 3 is the reaction space, or called a reaction chamber. The photoreactor 2 has a matching port that matches the columnar light source placement slot 4, as well as a feed port 21, a discharge port 22, and an aeration port 23 connected to the reaction space. The photoreactor 2 and the columnar light source placement slot 4 are made of quartz glass, which has high light transmittance and can withstand high temperature, high pressure and chemical corrosion during large-scale photocatalytic reactions. Among them, the inner layer of the matching port at the upper end of the photoreactor 2 and the outer layer of the columnar light source placement slot 4 in contact with it are both provided with frosted surfaces. The frosted surface enables the two to be matched and sealed.
[0037] More preferably, the joint of the columnar light source placement slot 4 and the photoreactor 2 is fixed by a flange, and the outer surface of the photoreactor 2 joined to the flange is set as a conical surface, which can effectively prevent the joint from breaking due to mechanical vibration during the high-temperature and high-pressure chemical reaction. The feed port 21 and the discharge port 22 are arranged at the upper part of the photoreactor 2 and connected to the reaction space, which can support multiphase catalytic reactions. The aeration port 23 is arranged at the upper part of the photoreactor 2 and connected to the reaction space. The aeration device connected to the aeration port 23 can make the liquid in the reaction chamber contact with the air for oxygenation, and due to the stirring of the liquid, the transfer of oxygen in the air to the liquid is accelerated, thereby achieving the purpose of oxygenation. In addition, the aeration device also prevents the suspension in the pool from sinking and strengthens the contact between the chemical substances in the reaction chamber and the dissolved oxygen, thereby ensuring that the chemical substances in the reaction chamber have an oxidative decomposition effect on organic matter under the condition of sufficient dissolved oxygen.
[0038] The second cold trap structure 3 is composed of a space enclosed by two layers of quartz glass located inside and outside the tubular body of the columnar light source placement slot 4. A first water inlet 41 and a first water outlet 42 are provided at the top of the columnar light source placement slot 4, connecting to the enclosed space. Similarly, the first cold trap structure 1 is composed of a space enclosed by two layers of quartz glass located inside and outside the body of the photoreactor 2. The photoreactor 2 is provided with a second water inlet 11 and a second water outlet 12, connecting to the enclosed space. A temperature control medium is introduced between the two layers of quartz glass or vacuumed through these two sets of water inlets and outlets, absorbing the heat generated by the intermediate columnar light source during illumination and providing precise temperature control for the device. The temperature control medium introduced into the two cold traps can have a large temperature difference, resulting in a certain temperature gradient for the reaction fluid within the reaction chamber.
[0039] like Figure 2As shown, the light source device 6 is matched with the top of the column light source placement slot 4; the light source device 6 includes a column light source extending into the column light source placement slot 4, and a control component located at the top of the column light source and matched with the open top of the column light source placement slot 4. By providing a built-in column light source for the reaction fluid in the photoreactor 2, it is beneficial to the uniformity of the illumination, and avoids the blind spots of the illumination, so that the reaction is more complete. Among them, the control component includes: an air cooling device and a water cooling device, the air cooling device includes an air inlet 73 and an air outlet 74 provided in the control component, which are used to connect to the column light source placement slot 4 to cool the air of the column light source. The water cooling device includes a third water inlet 71 and a third water outlet 72 provided in the control component, which are used to connect to the column light source placement slot 4 and pass cooling water to cool it.
[0040] In certain embodiments provided herein, the columnar light source can accommodate various light sources, including but not limited to LED lamps, mercury lamps, and the like. A water-cooling device can cool the light source by introducing cooling water through the water inlet and outlet of the T-shaped tube. Simultaneously, the heat generated by the light emission heats the air surrounding the light source. The air-cooling device can effectively expel the hot air and introduce cool air through the third air inlet and third air outlet on the columnar light source placement slot 4, thereby protecting the light source from damage.
[0041] In summary, the light reaction device in this embodiment has a simple and reasonable structure and adopts continuous flow operation, which greatly improves the continuity of the reaction process, enables large-scale continuous production, and significantly enhances production capacity. At the same time, the light reactor 2 and the columnar light source cavity are both made of quartz glass, which has high light transmittance and pressure resistance and corrosion resistance, and the reaction process can be directly observed, and operation and maintenance are very convenient. The light reactor 2 and the light source cavity are both provided with independent cooling chambers, which can flexibly adjust the flow rate and temperature of the temperature control medium as needed to achieve precise temperature control of the reaction process. The temperature difference between different cooling chambers can produce a temperature gradient, which is conducive to the conduction of heat-sensitive reactions. Accurate temperature control can greatly improve the selectivity and yield of the reaction.
[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, improvements, equivalent replacements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A photoreaction device with a cold trap, characterized in that: The invention comprises a light reactor (2) having a first cold trap structure (1) and a column light source placement groove (4) having a second cold trap structure (3); the internal space of the column light source placement groove (4) located in the inner layer of the first cold trap structure (1) is used to place the column light source; the column light source placement groove (4) is detachably connected to a matching opening at the upper end of the light reactor (2) and extends into the internal space of the light reactor (2); and the light reaction space (5) located between the column light source placement groove (4) and the first cold trap structure (1) in the light reactor (2) is used to introduce reaction substances.
2. The photoreaction device with a cold trap according to claim 1, characterized in that: The inner layer of the fitting opening at the upper end of the light reactor (2) and the outer layer of the columnar light source placement groove (4) in contact therewith are both provided with frosted surfaces.
3. The photoreaction device with a cold trap according to claim 1, characterized in that: The joint between the columnar light source placement groove (4) and the light reactor (2) is fixed via a flange, and the outer surface of the light reactor (2) where it is joined to the flange is configured as a conical surface.
4. The photoreaction device with a cold trap according to claim 1, characterized in that: The second cold trap structure (3) is composed of a space enclosed by two layers of quartz glass inside and outside the tube body of the columnar light source placement groove (4), and a first water inlet (41) and a first water outlet (42) connected to the enclosed space are provided at the top of the columnar light source placement groove (4).
5. The photoreaction device with a cold trap according to claim 1, characterized in that: The photoreactor (2) further comprises: a feed port (21) and a discharge port (22) for placing reaction substances; the feed port (21) and the discharge port (22) are arranged at the upper part of the photoreactor (2) and communicated with the reaction space.
6. The photoreaction device with a cold trap according to claim 1, characterized in that: The photoreactor (2) further comprises an aeration port (23) for introducing gas, wherein the aeration port (23) is arranged at the upper portion of the photoreactor (2) and communicates with the reaction space.
7. The photoreaction device with a cold trap according to claim 1, characterized in that: The first cold trap structure (1) is composed of a space enclosed by two layers of quartz glass located inside and outside the body of the photoreactor (2); the photoreactor (2) is provided with a second water inlet (11) and a second water outlet (12) connected to the enclosed space.
8. The photoreaction device with a cold trap according to claim 1, characterized in that: Also includes: A light source device (6) is matched with the top of the column light source placement groove (4); the light source device (6) comprises a column light source extending into the column light source placement groove (4), and a control component located at the top of the column light source and matched with the top opening of the column light source placement groove (4).
9. The photoreaction device with a cold trap according to claim 8, characterized in that: The control component includes: an air cooling device, comprising an air inlet (73) and an air outlet (74) provided in the control assembly, for communicating with the column light source placement slot (4) to cool the air of the column light source; and / or The water cooling device comprises a third water inlet (71) and a third water outlet (72) provided in the control assembly, and is used for being connected to the columnar light source placement slot (4) and allowing cooling water to flow in for cooling.
10. The photoreaction device with a cold trap according to claim 8, characterized in that: The types of column light sources include: LED lamps and mercury lamps.