Catalyst filter and catalyst recovery system

Abstract

This disclosure relates to catalyst filters and catalyst recovery systems. In one aspect, a catalyst filter is provided, comprising: a housing having an inlet, a first outlet, and a second outlet; the housing interior defining a clear liquid collection chamber and a catalyst collection chamber, the clear liquid collection chamber communicating with the first outlet and the catalyst collection chamber communicating with the second outlet; and a filter element disposed within the housing for separating catalyst-containing turbid liquid entering the housing from a reaction system via the inlet into a clear liquid and a catalyst slurry, wherein the clear liquid collection chamber is connected to the clear liquid side of the filter element to collect the clear liquid, the catalyst collection chamber is located at the bottom of the housing to collect the catalyst slurry, and the second outlet is configured to communicate with the feed side of the reaction system to return the collected catalyst slurry to the reaction system for recycling. This improves the recovery rate of solid-phase catalysts, reduces catalyst loss and solid waste disposal costs, and increases product purity.

Description

Technical Field

[0001] This disclosure relates to the field of chemical separation technology, and in particular to catalyst filters and catalyst recovery systems. Background Technology

[0002] In production processes involving liquid-phase catalytic reactions, such as coal chemical industry, fine chemical industry, and pesticide intermediate synthesis, the separation and recovery of solid-phase catalysts from reaction liquids are important steps.

[0003] In related technologies, after the reaction is completed, the solid catalyst in the reaction liquid is usually separated by sedimentation or ordinary filtration. However, the catalyst interception rate is low, and a large amount of catalyst will enter the subsequent equipment with the liquid material, affecting the purity of the product. Even if some catalyst is intercepted and collected, it is difficult to effectively return it to the reaction system for recycling, resulting in catalyst loss and increased production costs. Utility Model Content

[0004] This section provides a general overview of this disclosure, rather than a full disclosure of the entire scope or all features of this disclosure.

[0005] According to embodiments of this disclosure, a catalyst filter and a catalyst recovery system are provided, which can improve the recovery rate of solid catalysts, reduce catalyst loss and solid waste disposal costs, and improve product purity.

[0006] According to one aspect of this disclosure, a catalyst filter is provided. The catalyst filter includes a housing and a filtering element. The housing is provided with an inlet, a first outlet, and a second outlet. The housing interior defines a clear liquid collection chamber and a catalyst collection chamber, the clear liquid collection chamber communicating with the first outlet and the catalyst collection chamber communicating with the second outlet. The filtering element is disposed within the housing for separating catalyst-containing turbid liquid entering the housing from the reaction system via the inlet into a clear liquid and a catalyst slurry. The clear liquid collection chamber is connected to the clear liquid side of the filtering element to collect the clear liquid, and the catalyst collection chamber is located at the bottom of the housing to collect the catalyst slurry. The second outlet is configured to communicate with the feed side of the reaction system to return the collected catalyst slurry to the reaction system for recycling.

[0007] According to another aspect of this disclosure, a catalyst recovery system is also provided. The catalyst recovery system includes a reaction system and a catalyst filter according to the foregoing aspects. The reaction system includes a reaction unit for containing a solid-phase catalyst and reactants for a catalytic reaction. The inlet of the catalyst filter is connected to the outlet of the reaction unit, and a second outlet is connected to the feed side of the reaction system. Attached Figure Description

[0008] The features and advantages of embodiments of the present disclosure will become more readily understood from the following description with reference to the accompanying drawings. The drawings are not drawn to scale and some features may be enlarged or reduced to show details of specific components. In the drawings:

[0009] Figure 1 This is a schematic diagram of a catalyst filter according to an embodiment of the present disclosure.

[0010] Figure 2 This is a schematic diagram of a catalyst recovery system according to an embodiment of the present disclosure.

[0011] Figure 3 This is a schematic diagram of a graded filter according to an embodiment of the present disclosure.

[0012] Figure 4 This is a schematic diagram of a catalyst recovery system according to another embodiment of the present disclosure.

[0013] Figure 5 This is a schematic diagram of a catalyst recovery system according to yet another embodiment of the present disclosure.

[0014] In the accompanying drawings, the same or corresponding technical features or components are represented by the same or corresponding reference numerals. Detailed Implementation

[0015] The present disclosure will now be described in detail with reference to the accompanying drawings and exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is not intended to limit the scope of the disclosure.

[0016] It should be noted that, for clarity, not all features of a particular embodiment are described or shown in the specification and drawings. Furthermore, to avoid unnecessary details obscuring the technical solutions of interest in this disclosure, only the device structure closely related to the technical solutions of this disclosure is described and shown in the specification and drawings, while other details that are not closely related to the technical content of this disclosure and are known to those skilled in the art are omitted.

[0017] In fields such as coal chemical industry, fine chemical industry, and pesticide intermediate synthesis, liquid-phase catalytic reaction processes typically require the participation of solid-phase catalysts. After the reaction is complete, the solid-phase catalyst needs to be separated from the catalyst-containing reaction liquid (i.e., turbid liquid) to ensure the purity of the products in subsequent processes and to reduce the risk of catalyst entering downstream equipment and causing blockages.

[0018] In related technologies, after the reaction in the reaction unit, such as a reactor, is completed, the reaction liquid is allowed to settle for several hours until the catalyst particles settle to the bottom of the reactor. Then, the upper layer of material is introduced into subsequent equipment, such as a neutralization vessel. Due to incomplete sedimentation and separation, a large amount of solid catalyst still enters the subsequent equipment along with the liquid phase material. Therefore, a security filter is usually installed at the end of the subsequent equipment to intercept residual catalyst particles in the outflowing material.

[0019] However, the filtration accuracy and interception efficiency of security filters are generally low, and a considerable proportion of catalyst particles still enter downstream processes, affecting product purity and specifications. On the other hand, the catalyst intercepted by security filters usually cannot be recycled and must be deactivated before being discharged as solid waste, resulting in catalyst loss and increased solid waste treatment costs.

[0020] To address this issue, this disclosure provides a catalyst filter and a catalyst recovery system to improve the separation and interception efficiency of solid-phase catalysts and to achieve effective recovery and recycling of the intercepted catalyst slurry. The following refers to... Figures 1 to 5 The catalyst filter and catalyst recovery system are described in detail.

[0021] First, refer to Figure 1 According to embodiments of the present disclosure, a catalyst filter 100 is provided. The catalyst filter 100 includes a housing 120 and a filter element 140.

[0022] The housing 120 is the external pressure-bearing structure of the catalyst filter 100. Inside the housing 120, there are two independent clear liquid collection chambers 122 and catalyst collection chambers 124.

[0023] The shell 120 is provided with an inlet (i.e., turbid liquid inlet) 120a, a first outlet (i.e., clear liquid outlet) 120b, and a second outlet (i.e., catalyst slurry outlet) 120c. Inlet 120a is used to discharge the catalyst slurry from reaction unit 200 of reaction system 20 (see...) Figure 2 The catalyst-containing turbid liquid is introduced into the housing 120. The first outlet 120b is connected to the clear liquid collection chamber 122, used to discharge the clear liquid obtained after filtration by the filter element 140 to downstream equipment (e.g., a neutralization vessel) 500 (see...). Figure 2 The second outlet 120c is connected to the catalyst collection chamber 124 and is used to discharge the catalyst slurry deposited in the catalyst collection chamber 124 and return it to the reaction system 20 for recycling.

[0024] The clear liquid collection chamber 122 is connected to the clear liquid side (i.e., the inner cavity side of the filter element 140) of the filter element 140 to collect the clear liquid flowing out after filtration by the filter element 140, and to discharge the clear liquid downstream through the first outlet 120b. The catalyst collection chamber 124 is located at the bottom of the housing 120 and is used to collect the catalyst slurry formed after the solid catalyst particles intercepted on the outer surface of the filter element 140 during the filtration process settle naturally.

[0025] A filter element 140 is disposed inside the housing 120 and is used to separate the catalyst-containing turbid liquid entering the housing 120 through the inlet 120a into a clear liquid and a catalyst slurry. Specifically, the catalyst-containing turbid liquid flows from the outside to the inside of the filter element 140. During this process, solid catalyst particles in the catalyst-containing turbid liquid are intercepted on the outer surface of the filter element 140, while the liquid phase (clear liquid) passes through the filter element 140 and flows out from the inner cavity of the filter element 140, flowing into the clear liquid collection chamber 122, and finally being discharged through the first outlet 120b. The intercepted solid catalyst particles settle to the catalyst collection chamber 124 at the bottom of the housing 120 under the action of gravity, forming a catalyst slurry.

[0026] In this embodiment, the second outlet 120c is configured to be connected to the feed side of the reaction system 20 via a return pipeline (see...). Figure 2 Specifically, it is connected to the catalyst feed tank 300 of the reaction system 20, which will be described in detail below, to return the catalyst slurry collected in the catalyst collection chamber 124 to the reaction system 20 for recycling. In this way, the activity of the solid catalyst particles contained in the catalyst slurry is retained, and by returning it to the reaction system 20 to participate in subsequent batches of reaction, both the amount of fresh catalyst replenishment is saved and the treatment cost problem caused by the large amount of catalyst solid waste in related technologies is eliminated.

[0027] Thus, the catalyst filter 100 achieves efficient separation of catalyst-containing turbid liquid with the help of the filter element 140. The clear liquid is sent downstream through the first outlet 120b, which improves the purity of the product. Moreover, the catalyst slurry is returned to the reaction system 20 for recycling through the second outlet 120c, which improves the catalyst interception rate and enables the catalyst to be effectively recovered and reused, thereby reducing catalyst loss and production costs.

[0028] It is conceivable that the filtration accuracy of filter element 140 can be between 1 and 50 μm.

[0029] This filtration accuracy is significantly higher than that of security filters in related technologies, thus effectively intercepting the vast majority of solid catalyst particles, improving the catalyst interception rate, reducing the amount of catalyst entering downstream processes, and improving product purity.

[0030] Reference Figure 1It is conceivable that the catalyst filter 100 may also include a flushing component 160. The flushing component 160 is disposed on the top of the housing 120 and configured to spray flushing liquid into the housing 120 to flush the solid catalyst adhering to the outer surface of the filter component 140 and / or the inner wall of the housing 120 into the catalyst collection chamber 124.

[0031] Specifically, when the catalyst filter 100 separates and filters materials from the reactor, after the catalyst filter 100 completes the filtration of one batch of materials, some solid catalyst particles adhere to the outer surface of the filter element 140 and / or the inner wall of the housing 120. If these particles are not cleaned, they may not be effectively recovered when the next batch of materials enters, affecting the filtration effect of the next batch. Figure 2 As shown, flushing fluid can be supplied to flushing component 160 via pipeline 601 connected to flushing component 160. Flushing component 160 sprays flushing fluid into housing 120 to wash away attached catalyst particles, causing these detached catalyst particles to settle along the inner wall of housing 120 into catalyst collection chamber 124. After flushing, the flushing fluid can be discharged from the equipment or not discharged (if the flushing fluid is a clear liquid and will not introduce other impurities or contaminants), allowing for the filtration of the next batch of material.

[0032] This design further improves the catalyst recovery rate and ensures the cleanliness of the outer surface of the filter element 140 after a certain filtration cycle, laying the foundation for stable operation in the next filtration cycle.

[0033] It is conceivable that the rinsing component 160 may include a plurality of nozzles arranged circumferentially along the top of the housing 120, with each nozzle spraying in a direction toward the outer surface of the filter component 140, so as to achieve uniform rinsing coverage of the outer surface of the filter component 140.

[0034] Other forms of the rinsing component 160 are also conceivable, and this disclosure does not limit them. Furthermore, the rinsing fluid may be water, a cleaning solution, a solvent, or other suitable liquid, depending on specific process requirements.

[0035] Reference Figure 1 It is conceivable that the catalyst filter 100 may also include a dynamic wave generator 180. The dynamic wave generator 180 is disposed within the housing 120 and is used to clean and regenerate the filter element 140 when at least one of the following conditions is met: first, the pressure difference between the input and output sides of the filter element 140 reaches a set value; second, the cumulative filtration time of the filter element 140 reaches a set duration.

[0036] Understandably, as the filtration operation continues, solid catalyst particles not only adhere to the outer surface of the filter element 140 but also gradually clog the pores of the filter element 140, leading to increased filtration resistance. Consequently, the pressure difference between the input and output sides of the filter element 140 rises, reducing filtration efficiency. Relying solely on the flushing element 160 to flush the outer surface of the filter element 140 may not achieve the desired removal effect for catalyst particles that have penetrated deep into the pores.

[0037] The introduction of the dynamic wave generator 180 as a regeneration device can solve this deep clogging problem. Here, "dynamic wave" refers to ultrasonic waves with a specific frequency and power generated by the dynamic wave generator 180. High-intensity ultrasonic waves can generate a strong cavitation effect in the liquid medium, thereby vibrating and stripping solid catalyst particles deep inside the pores of the filter element 140, achieving a more thorough cleaning effect than simple liquid rinsing. As a result, the service life of the filter element 140 can be extended, maintaining the long-term stable operation of the catalyst filter 100.

[0038] In some embodiments, the dynamic wave generator 180 operates at a frequency of 20 to 1000 kHz and has an output power of 1 to 1000 kW.

[0039] If the frequency and power are too low, the cleaning effect will be insufficient, and the catalyst particles in the pores will not be effectively removed; however, if the frequency and power are too high, it may damage the filter element 140 and the housing 120 itself, affecting the filtration effect and the service life of the filter element 140. Within the above range, the dynamic wave generator 180 can achieve thorough cleaning and regeneration of the pores of the filter element 140 without damaging the equipment.

[0040] In some implementations, dynamic wave cleaning only takes 5-20 minutes per cycle. Cleaning can be performed in two stages: after the first cleaning, wait 10-30 minutes for the catalyst particles to be discharged before performing a second cleaning for better results. The entire cleaning process takes 1-2 hours.

[0041] In some embodiments, the catalyst filter 100 may further include a differential pressure detection device. The differential pressure detection device is connected to the input and output sides of the filter element 140 and is configured to detect the differential pressure between the input and output sides, and to issue a cleaning and regeneration start signal when the differential pressure reaches 100~500kPa, so as to trigger the power wave generator 180 to clean and regenerate the filter element 140.

[0042] If the pressure difference is below 100 kPa, the degree of pore blockage in the filter element 140 is still within an acceptable range, and premature regeneration will reduce the continuous operating efficiency of the equipment. However, if the pressure difference exceeds 500 kPa, the filter element 140 is severely blocked, the output of clear liquid will decrease, and the filtration efficiency will also decrease significantly. Through real-time monitoring and automatic triggering by the pressure difference detection device, the timing of regeneration of the filter element 140 can be precisely controlled, reducing manual intervention and improving the automation level of the equipment.

[0043] Understandably, the condition for triggering regeneration can also be that the cumulative filtration time reaches a set duration. For example, the regeneration system can be started after the cumulative filtration time reaches 8 to 72 hours. The above two triggering methods can be used individually or in combination, that is, regeneration can be started when either condition is met, in order to adapt to the actual needs under different operating conditions.

[0044] Reference Figure 1 In some embodiments, the filter element 140 is configured to allow the catalyst-containing turbid liquid to flow from the outside to the inside of the filter element 140 (as shown by the dashed arrow), the solid catalyst in the catalyst-containing turbid liquid is intercepted on the outer surface of the filter element 140, the clear liquid flows out from the inner cavity of the filter element 140 and flows into the clear liquid collection chamber 122, and the intercepted solid catalyst settles into the catalyst collection chamber 124.

[0045] Specifically, the turbid liquid enters the inner cavity of the shell 120 from the top of the shell 120 through inlet 120a, and then passes through the filter element 140 (e.g., filter cartridge) from the outside to the inside. Solid catalyst particles are intercepted on the outer surface of the filter element 140, while the clear liquid flows out from the inner cavity of the filter element 140, collects in the clear liquid collection chamber 122, and is discharged from the clear liquid outlet (first outlet 120b) into downstream equipment. The catalyst slurry deposited in the catalyst collection chamber 124 is discharged from the second outlet 120c at the bottom and sent to the corresponding reactor or catalyst feeding tank for continued use. This filtration flow design from the outside to the inside allows the solid catalyst particles to naturally settle to the catalyst collection chamber 124 at the bottom of the shell 120 under the direction of gravity, which is beneficial for the concentrated collection and discharge of the catalyst slurry and avoids the large-area dispersion and accumulation of catalyst particles on the inner wall of the shell 120.

[0046] Reference Figure 1 In some embodiments, the inlet 120a is located at the top of the housing 120, the second outlet 120c is located at the bottom of the housing 120, and the first outlet 120b is located at the side or bottom of the housing 120, and the first outlet 120b and the second outlet 120c are independently provided.

[0047] The inlet 120a is located at the top, allowing the turbid liquid to enter the inner cavity of the housing 120 from above. This helps the turbid liquid to be evenly distributed around the filter element 140, improving filtration uniformity. The second outlet 120c is located at the bottom and is directly connected to the catalyst collection chamber 124, facilitating the natural collection and timely discharge of the catalyst slurry under gravity, preventing catalyst particles from accumulating and agglomerating at the bottom of the housing 120 for extended periods. The first outlet 120b and the second outlet 120c are independent of each other, ensuring complete separation of the discharge paths for the clear liquid and the catalyst slurry. This guarantees the purity of the clear liquid and the concentration of the catalyst slurry, ensuring efficient subsequent catalyst reuse.

[0048] Reference Figure 2 According to embodiments of this disclosure, a catalyst recovery system 10 is also provided. The catalyst recovery system 10 includes a reaction system 20 and the catalyst filter 100 described above. The reaction system 20 includes a reaction unit 200, which is provided with an inlet 220 and an outlet 240. The inlet 120a of the catalyst filter 100 is connected to the outlet 240 of the reaction unit 200, and the second outlet 120c is connected to the feed side of the reaction system 20.

[0049] The reaction unit 200 is a device for containing a solid-phase catalyst and reactants to carry out a catalytic reaction, such as a reaction vessel. The reactants may include liquid-phase reactants. In some embodiments, the reactants may also include gaseous reactants, such as hydrogen. In actual production, the reactants and solid-phase catalyst are fed into the reaction unit 200 together and reacted under stirring conditions at specific temperature and pressure. After the reaction is complete, the reaction product containing the solid-phase catalyst (i.e., catalyst-containing turbid liquid) is directly forced from the outlet 240 of the reaction unit 200 into the inlet 120a of the catalyst filter 100 for filtration and separation. The filtered clear liquid is sent to downstream equipment 500, such as a neutralization vessel, through the first outlet 120b, while the catalyst slurry is returned to the feed side of the reaction system 20 through the second outlet 120c via a return pipeline for continued use in subsequent batches of reaction.

[0050] Understandably, due to the high filtration accuracy of the catalyst filter 100, the clear liquid flowing out of the first outlet 120b of the catalyst filter 100 contains very few solid catalyst particles. Therefore, the security filter located at the rear end of the neutralization vessel in related technologies can be discontinued, and the clear liquid from the neutralization vessel can directly enter subsequent processes. This change not only simplifies the production process and reduces the number of equipment, but also eliminates the problems of low interception rate of the security filter and large amounts of catalyst loss to subsequent processes in related technologies, making the operation of the entire catalyst recovery system 10 more stable.

[0051] Reference Figure 2It is conceivable that the reaction system 20 may also include a catalyst feeding tank 300. The catalyst feeding tank 300 is connected to the second outlet 120c and the feed inlet 220 of the reaction unit 200 via pipelines.

[0052] The catalyst feed tank 300 serves as a hub for catalyst buffering and refeeding in the catalyst recovery system 10. Specifically, after the catalyst filter 100 completes the filtration of one batch of material, the catalyst slurry at the bottom of the shell 120 (i.e., the catalyst slurry in the catalyst collection chamber 124) can be temporarily stored in the catalyst feed tank 300 via the second outlet 120c. When the next batch of reaction begins, the catalyst feed tank 300 will then send the catalyst slurry into the inlet 220 of the reaction unit 200, where it will be added to the reaction unit 200 along with fresh reactants to participate in the reaction.

[0053] The catalyst feeding tank 300 decouples the return of catalyst slurry from the feeding rhythm of reaction unit 200. That is, after completing filtration, catalyst filter 100 can immediately discharge catalyst slurry into catalyst feeding tank 300 without waiting for reaction unit 200 to enter the next batch feeding state. This allows catalyst filter 100 to empty the bottom material in time, preparing for the next batch filtration and improving the continuous operation efficiency of the entire system.

[0054] It is conceivable that, under certain operating conditions, the catalyst slurry at the bottom of the catalyst filter 100 can be directly transported to the reaction unit 200, which has completed discharge and is in an empty state, without passing through the catalyst feeding tank 300, so that the catalyst can directly continue to participate in the next batch of reaction, thereby further shortening the catalyst reuse cycle.

[0055] Reference Figure 2 and Figure 3 It is conceivable that the catalyst recovery system 10 may also include a staged filter 400. The staged filter 400 is connected to the second outlet 120c via a pipeline and is used to selectively intercept catalyst particles in the catalyst slurry.

[0056] Understandably, during repeated catalyst recycling, catalyst particles will gradually produce smaller, less active particles due to wear and breakage. If these smaller particles continue to circulate in the system, they will have limited contribution to improving reaction conversion rates due to their low activity, and they will be more difficult to intercept in subsequent processes, affecting product specifications. A staged filter 400 can be used to filter out these smaller particles.

[0057] In some embodiments, the filtration precision of the staged filter 400 can be between 0.5 and 10 μm, which is finer than that of the catalyst filter 100 (filtration precision of 1 to 50 μm). The staged filter 400 may contain filter elements 440 with a finer precision than that of the catalyst filter 100, such as filter bags.

[0058] Specifically, such as Figure 3 As shown, the graded filter 400 may have a fixing structure (e.g., a fixing ring) within its housing 420, and the filter element 440 is fixedly sealed to the fixing structure. When liquid flows through the filter element 440, particles larger than the pore size of the filter element 440 are intercepted and collected. Figure 3 These particles are schematically shown as hollow circles, thus allowing the collection of catalyst particles with smaller diameters. After the filter element 440 has been used for a period of time, the device should be opened, the collected catalyst particles with smaller diameters removed, and then it should be reinstalled. Alternatively, it can be cleaned before reinstallation.

[0059] In actual operation, the staged filter 400 is not continuously used. Instead, a small portion of the catalyst slurry from the bottom of the catalyst filter 100 is introduced into the staged filter 400 for treatment at specific time intervals (e.g., every day or week). This selectively intercepts and collects catalyst particles with smaller particle sizes and lower activity in the slurry. By periodically removing these fine catalyst particles from the system, the overall activity of the catalyst within the reaction unit 200 can be improved, thereby increasing the reaction conversion rate and product yield.

[0060] Reference Figure 3 It can be envisioned that the graded filter 400 is equipped with a liquid inlet 401, a deactivating agent inlet 402, a clear liquid outlet 404, and a sewage outlet 406.

[0061] Liquid inlet 401 is connected to the second outlet 120c and is used to receive catalyst slurry entering the staged filter 400. Deactivator inlet 402 is used to introduce catalyst deactivator into the intercepted catalyst particles to deactivate them. Clear liquid outlet 404 is connected to downstream equipment and is used to send the clear liquid after staged filtration to the downstream equipment. Drain outlet 406 is generally used to discharge accumulated sludge at the bottom of the equipment.

[0062] It should be noted that the introduction of catalyst deactivator is not always necessary. For certain types of catalysts, if they are not deactivated, there may be safety risks when they come into contact with air after leaving the equipment or are discharged directly, or they may continue to exert catalytic activity during subsequent solid waste treatment, affecting the obtained products or generating side reactions. In the above situations, catalyst deactivator is introduced into the staged filter 400 through the deactivator inlet 402, causing the intercepted fine catalyst particles to lose their catalytic activity, and then discharged as solid waste through the discharge outlet 406, thus achieving safe disposal. For catalyst types without the above problems, catalyst deactivator can be omitted, and the intercepted catalyst particles can be directly discharged as solid waste. The setting of the deactivator inlet 402 makes this operation flexible and can be used as needed according to the characteristics of the specific catalyst system.

[0063] Reference Figure 4 It is conceivable that the catalyst recovery system 10 may include multiple reaction units 200 arranged in parallel, the outlet 240 of each reaction unit 200 is connected to the inlet 120a of the catalyst filter 100, and the outlet end of the return pipeline 602 that returns catalyst slurry to the reaction unit 200 is connected to the inlet 220 of each reaction unit 200.

[0064] In actual production, to achieve continuous or quasi-continuous production, multiple reaction units 200 are usually connected in parallel. Each reaction unit 200 takes turns completing the cycle of feeding, reaction, discharge, and filtration: when one reaction unit 200 completes the reaction and begins discharge filtration, other reaction units 200 can be in the feeding or reaction stage, thereby making full use of the processing capacity of the catalyst filter 100, reducing equipment downtime, and improving production efficiency.

[0065] The discharge ports 240 of each reaction unit 200 are all connected to the inlet 120a of the catalyst filter 100 via pipelines. This allows one catalyst filter 100 to serve multiple parallel reaction units 200, eliminating the need for separate filtration equipment for each reaction unit 200, reducing equipment investment costs, and simplifying system configuration. Simultaneously, the catalyst slurry recovered at the bottom of the catalyst filter 100 is returned to the inlet 220 of each reaction unit 200 via return pipelines, achieving unified distribution and recycling of the catalyst among multiple reaction units 200, further improving catalyst utilization efficiency.

[0066] In actual operation, after the reaction in a certain reaction unit 200 is completed, the material is discharged. The reaction products and catalyst enter the catalyst filter 100 together. After filtration, the catalyst slurry at the bottom of the shell 120 is transported to the catalyst feeding tank 300, or directly to the emptied reaction unit 200, so that the catalyst can continue to participate in the next batch of reaction and realize the rapid recycling of the catalyst.

[0067] Reference Figure 5 It is conceivable that the second outlet 120c is also directly connected to the feed inlet 220 of the reaction unit 200 through the bypass pipeline 603. The bypass pipeline 603 is set in parallel with the main return pipeline 604 through the catalyst feeding tank 300 to form a dual-path return structure for the catalyst slurry.

[0068] It is understandable that the main return pipeline 604 passing through the catalyst feed tank 300 and the bypass pipeline 603 not passing through the catalyst feed tank 300 are connected in parallel to form a dual-path return structure in which the catalyst slurry is returned from the second outlet 120c to the feed inlet 220 of the reaction unit 200.

[0069] Normally, the catalyst slurry is sent to the catalyst feeding tank 300 via the main return pipeline 604 for temporary storage, and then sent to the reaction unit 200 when the feeding time is right. This utilizes the buffering effect of the catalyst feeding tank 300 to make the feeding rhythm more flexible and controllable. However, when it is necessary to quickly and directly return the catalyst slurry to the reaction unit 200 (for example, when a reaction unit 200 has completed discharging and is in a state of being empty and waiting for feeding), the bypass pipeline 603 can be switched to bypass the catalyst feeding tank 300 and send the catalyst slurry directly to the reaction unit 200. This reduces intermediate steps, accelerates the catalyst recycling speed, and improves the system response efficiency.

[0070] The dual-path return structure gives the catalyst recovery system 10 greater operational flexibility: when the production pace is relatively relaxed, the catalyst feed tank 300 can be used to uniformly allocate the catalyst through the main return pipeline 604; when the production pace is tight or the catalyst needs to be quickly reused, the bypass can be switched to direct return, thereby adapting to the needs of different production conditions and further improving the overall operating efficiency and operational flexibility of the system.

[0071] In this disclosure, the terms "first," "second," etc., are used merely for descriptive purposes and should not be considered restrictive. Furthermore, although this disclosure has been described with reference to exemplary embodiments, it should be understood that this disclosure is not limited to the specific embodiments described and shown herein. Various changes to the exemplary embodiments can be made by those skilled in the art without departing from the scope defined by the claims of this disclosure.

[0072] The features mentioned and / or shown in the foregoing description of exemplary embodiments of this disclosure may be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. Such combinations or substitutions should also be considered as including within the scope of protection of this disclosure.

Claims

1. A catalyst filter, characterized in that, include: A housing is provided with an inlet, a first outlet, and a second outlet. The housing interior defines a clear liquid collection chamber and a catalyst collection chamber. The clear liquid collection chamber communicates with the first outlet, and the catalyst collection chamber communicates with the second outlet. A filter element, disposed within the housing, separates the catalyst-containing turbid liquid entering the housing from the reaction system via the inlet into a clear liquid and a catalyst slurry. The clear liquid collection chamber communicates with the clear liquid side of the filter element to collect the clear liquid, and the catalyst collection chamber is located at the bottom of the housing to collect the catalyst slurry. The second outlet is configured to be connected to the feed side of the reaction system to return the collected catalyst slurry to the reaction system for recycling.

2. The catalyst filter according to claim 1, characterized in that, It also includes a flushing component disposed on the top of the housing and configured to spray flushing liquid into the housing to flush the solid catalyst adhering to the outer surface of the filter component and / or the inner wall of the housing into the catalyst collection chamber.

3. The catalyst filter according to claim 1 or 2, characterized in that, It also includes a dynamic wave generator, which is disposed within the housing and is used to clean and regenerate the filter element when at least one of the following conditions is met: The pressure difference between the input and output sides of the filter element reaches a set value; and The cumulative filtration time of the filter component reaches the set duration.

4. The catalyst filter according to claim 1 or 2, characterized in that, The inlet is located at the top of the housing, the second outlet is located at the bottom of the housing, and the first outlet is located at the side or bottom of the housing, and the first outlet and the second outlet are independently located.

5. A catalyst recovery system, characterized in that, include: The reaction system includes a reaction unit, which is provided with an inlet and an outlet and is used to contain a solid catalyst and reactants for catalytic reaction. as well as According to any one of claims 1 to 4, the inlet of the catalyst filter is connected to the outlet of the reaction unit, and the second outlet is connected to the feed side of the reaction system.

6. The catalyst recovery system according to claim 5, characterized in that, The reaction system also includes a catalyst feeding tank, which is connected to the second outlet and the feed inlet of the reaction unit via pipelines.

7. The catalyst recovery system according to claim 5 or 6, characterized in that, It also includes a graded filter, which is connected to the second outlet via a pipeline and is used to selectively intercept catalyst particles in the catalyst slurry.

8. The catalyst recovery system according to claim 7, characterized in that, The graded filter is equipped with: The liquid inlet is connected to the second outlet. A deactivator inlet is used to introduce a catalyst deactivator into the intercepted catalyst particles for deactivation treatment; The clear liquid outlet is connected to downstream equipment; as well as The drain outlet is used to discharge the sludge accumulated at the bottom of the graded filter.

9. The catalyst recovery system according to claim 5 or 6, characterized in that, The system includes multiple reaction units arranged in parallel, with the outlet of each reaction unit connected to the inlet of the catalyst filter, and the outlet of the return pipeline for feeding the catalyst slurry back to the reaction unit connected to the inlet of each reaction unit.

10. The catalyst recovery system according to claim 6, characterized in that, The second outlet is also directly connected to the feed inlet of the reaction unit via a bypass pipeline. The bypass pipeline is connected in parallel with the main return pipeline passing through the catalyst feed tank to form a dual-path return structure for the catalyst slurry.

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