Polypropylene gas phase fluidized bed reactor

Abstract

The utility model is suitable for the technical field of fluidized bed reactors, and provides a polypropylene gas phase fluidized bed reactor which comprises a reactor body, the exhaust channel is communicated with the inner cavity of the reactor body; the filtering mechanism is arranged on the outer side of the reactor body; the filtering mechanism comprises a filtering box arranged beside the reactor body; the partition plate is arranged in the middle of an inner cavity of the filter box and divides the filter box into an upper filter cavity and a lower filter cavity which are independent from each other; according to the utility model, impurities in exhausted gas are efficiently removed, the cleanliness and the environmental protection standard of the finally exhausted gas are ensured, and the reaction efficiency and the conversion rate are improved by optimizing a stirring system; more obviously, by arranging the water tank and recycling a water source after spraying and settling, the device shows extremely high efficiency in the aspect of resource utilization; the cyclic utilization mechanism not only reduces the consumption of fresh water, but also reduces the influence of wastewater discharge on the environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluidized bed reactors, in particular to a polypropylene gas phase fluidized bed reactor. Background Art

[0002] With the rapid development of the global petrochemical industry, the market demand for polypropylene (PP), an important thermoplastic, continues to grow. It is widely used in packaging, automobiles, construction, home appliances and other fields. To meet this growing market demand, improving the efficiency, quality and environmental performance of polypropylene production has become a focus of attention both inside and outside the industry. In this context, the technological innovation and upgrading of polypropylene gas-phase fluidized bed reactors, as the core equipment in the polypropylene production process, are particularly important.

[0003] 1. Technology Demand and Market Drivers

[0004] 1. Market demand expansion: With the continuous growth of the global economy and the improvement of people's living standards, the demand for polypropylene products continues to increase, and the requirements for polypropylene production technology are also increasing;

[0005] 2. Increasing environmental pressure: Increasingly stringent environmental regulations are prompting companies to seek more environmentally friendly and energy-efficient production methods to reduce environmental pollution;

[0006] 3. Production efficiency and cost control: In the fierce market competition, improving production efficiency and reducing production costs have become the key to enhancing the competitiveness of enterprises;

[0007] 2. Technical Background and Current Situation Analysis

[0008] 1. Advantages of gas-phase fluidized bed technology: Gas-phase fluidized bed technology has great application potential in polypropylene production due to its stable operation, large production capacity, and fast heat and mass transfer rates.

[0009] 2. Application of the UNIPOL process: Grace Corporation's UNIPOL process is one of the most advanced polypropylene process technologies today. The gas-phase fluidized bed reactor system it uses is characterized by simplicity, flexibility, economy, and safety. The successful application of this process has provided strong support for technological innovation in polypropylene gas-phase fluidized bed reactors.

[0010] However, a significant problem in the current polypropylene processing process is that the gases produced by the reaction are often discharged along with the high-speed airflow. These discharged gases not only contain a large amount of unreacted materials, but also are mixed with other harmful impurities. If these untreated gases are directly discharged into the air, they will undoubtedly cause serious environmental pollution.

[0011] In addition, existing filtration systems often have limitations in their design. Specifically, the filtration structure is single and cannot effectively cope with the complex and changeable composition of exhaust gases. This single filtration method not only has low filtration efficiency, but also cannot fully intercept tiny particles and harmful substances in the gas, thus failing to meet environmental protection standards. Utility Model Content

[0012] The utility model provides a polypropylene gas-phase fluidized bed reactor, which aims to solve a prominent shortcoming in the current polypropylene processing process, that is, the reaction gas is discharged with the high-speed airflow, containing a large amount of unreacted materials and harmful impurities, which are directly discharged and seriously pollute the environment; at the same time, the existing filtration system has design limitations and a single filtration structure, which makes it difficult to efficiently filter complex gas components, and can neither effectively intercept tiny particles nor completely remove harmful substances, making it difficult to meet environmental protection standards.

[0013] The utility model is implemented as follows: a polypropylene gas-phase fluidized bed reactor, comprising a reactor body; an exhaust passage connected to an inner cavity of the reactor body; a filter mechanism provided on the outside of the reactor body; wherein the filter mechanism comprises: a filter box provided beside the reactor body; a partition provided in the middle of the inner cavity of the filter box, the partition dividing the filter box into an independent upper filter chamber and a lower filter chamber; a water tank provided on the side of the filter box away from the reactor body, a spray pipe connected between the water tank and the lower filter chamber, one end of the spray pipe extending to the lower position of the water tank, and the other end of the spray pipe extending to the upper position of the lower filter chamber and connected to a plurality of spray heads; a recovery conduit further connected between the lower filter chamber and the water tank, the recovery conduit extending to the lower filter chamber and the lower position of the water tank respectively; a rotating shaft provided at the bottom position of the lower filter chamber, the rotating shaft and the lower filter chamber being rotatably engaged, and a plurality of stirring blades provided on the outer side of the rotating shaft; a first motor provided at the lower position of the filter box, the output end of the first motor being fixedly connected to the end key of the rotating shaft.

[0014] Preferably, the filtering mechanism further comprises: a plurality of filtering layers arranged in the upper filtering cavity, wherein the plurality of filtering layers are arranged in parallel; the plurality of filtering layers are, from bottom to top, polypropylene microporous filter membrane, ultrafine fiber polypropylene filter membrane and polytetrafluoroethylene filter membrane.

[0015] Preferably, an assembly groove is provided between the partitions, and a fan is installed in the assembly groove. One end of the fan is connected to the upper filter chamber, and the other end of the fan is connected to the lower filter chamber.

[0016] Preferably, a gas detection sensor is provided at the upper position of the upper filter cavity, and an exhaust pipe communicating with the inner cavity of the filter box is provided at the top position of the filter box.

[0017] Preferably, the side wall of the lower filter cavity is provided with an electric heating block and a temperature sensor, the outer side wall of the reactor body is provided with a display screen, and the display screen is electrically connected to the electric heating block, the temperature sensor and the filter mechanism.

[0018] Preferably, the recovery conduit, the spray pipe and the exhaust pipe are all provided with a one-way valve.

[0019] Preferably, a connecting rod is rotatably mounted in the reactor body, and a stirring shaft is provided on the connecting rod.

[0020] Preferably, a driving motor is provided at the top of the reactor body, and the output end of the driving motor is fixedly connected to the end key of the connecting rod.

[0021] Preferably, an activated carbon adsorption layer is provided in the water tank.

[0022] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0023] Firstly, through the steps of preliminary filtration and spraying, stirring and settling in the lower filter chamber, as well as the step-by-step filtration of multi-layer filter membranes in the upper filter chamber, the device achieves efficient removal of impurities in the exhaust gas. The combined use of filter layers ensures comprehensive interception of particles from large to small, significantly improving the filtration effect. The dust content of the gas after fine filtration is greatly reduced, effectively resisting the erosion of corrosive gases or chemicals, thereby ensuring that the final exhaust gas is both clean and meets environmental standards.

[0024] Secondly, the stirring shaft rotates inside the reactor body, achieving full mixing and dispersion of the materials. This mixing and dispersion directly increases the reaction rate and conversion rate, making the gas-phase polymerization of polypropylene more efficient. At the same time, the coordinated work of the electric heating block and the temperature sensor maintains the appropriate temperature of the spray water, further improving the filtration efficiency and system stability. The combined effect of these designs makes the entire reaction process smoother and more reliable, reduces failures and downtime, and improves production efficiency and economic benefits.

[0025] Third: By setting up a water tank, the polypropylene gas-phase fluidized bed reactor achieves efficient treatment and recycling of water after spraying and sedimentation. Specifically, when the exhaust gas containing dust particles passes through the spraying and sedimentation of the lower filter chamber, the dust particles are moistened and settled to the bottom of the chamber, and the clean water is guided back to the water tank through the recovery duct. In the water tank, the water can be further treated to remove residual tiny particles and impurities to ensure that the water quality meets the standards for reuse. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the utility model;

[0027] Figure 2 It is a front structural schematic diagram of the utility model;

[0028] Figure 3 It is a three-dimensional structural diagram of the utility model;

[0029] Figure 4 This utility model Figure 2 A schematic diagram of the enlarged structure at point A;

[0030] In the figure: 1. Reactor body; 2. Exhaust channel; 3. Filter box; 4. Partition; 5. Upper filter chamber; 6. Lower filter chamber; 7. Water tank; 8. Spray pipe; 9. Spray head; 10. Recovery duct; 11. Rotating shaft; 12. Stirring blade; 13. Filter layer; 14. Polypropylene microporous filter membrane; 15. Microfiber polypropylene filter membrane; 16. Polytetrafluoroethylene filter membrane; 17. Fan; 18. Electric heating block; 19. Temperature sensor; 20. Display screen; 21. Gas detection sensor; 22. Exhaust pipe; 23. One-way valve; 24. Connecting rod; 25. Stirring shaft; 26. Drive motor; 27. First motor. DETAILED DESCRIPTION

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0032] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0033] The present invention provides a polypropylene gas phase fluidized bed reactor. Figure 1-4As shown, it includes a reactor body 1; an exhaust channel 2 connected to the inner cavity of the reactor body 1; a filtering mechanism provided on the outside of the reactor body 1; wherein the filtering mechanism includes: a filter box 3 provided beside the reactor body 1; a partition 4 provided in the middle of the inner cavity of the filter box 3, the partition 4 separating the filter box 3 into an independent upper filter chamber 5 and a lower filter chamber 6; a water tank 7 is provided on the side of the filter box 3 away from the reactor body 1, a spray pipe 8 is connected between the water tank 7 and the lower filter chamber 6, and one end of the spray pipe 8 extends to the lower position of the water tank 7. The other end of the spray pipe 8 extends to the upper position of the lower filter chamber 6 and is connected to a plurality of spray heads 9; a recovery duct 10 is also connected between the lower filter chamber 6 and the water tank 7, and the recovery duct 10 extends to the lower position of the lower filter chamber 6 and the water tank 7 respectively; a rotating shaft 11 is provided at the bottom position of the lower filter chamber 6, and the rotating shaft 11 and the lower filter chamber 6 are rotatably matched, and a plurality of stirring blades 12 are provided on the outside of the rotating shaft 11, and a first motor 27 is provided at the lower position of the filter box 3, and the output end of the first motor 27 is fixedly connected with the end key of the rotating shaft 11.

[0034] It should be noted that, in the current polypropylene processing process, a prominent drawback is that the reaction gas is discharged with the high-speed airflow, which contains a large amount of unreacted materials and harmful impurities, which are directly discharged and seriously pollute the environment; at the same time, the existing filtration system is limited in design and the filtration structure is single, which makes it difficult to efficiently filter complex gas components, and can neither effectively intercept tiny particles nor completely remove harmful substances, so it is difficult to meet environmental protection standards. The present solution uses a carefully designed filtration system through the reactor, including preliminary filtration in the lower filter chamber 6, spray stirring sedimentation and multi-layer filter membrane step-by-step filtration in the upper filter chamber 5, to achieve efficient removal of impurities in the exhaust gas, ensuring that the final discharged gas is both clean and meets environmental protection standards; at the same time, by providing a water tank 7 and a recovery conduit 10, the water source after spraying and sedimentation is efficiently treated and recycled, reducing the consumption of fresh water and wastewater discharge, and realizing water resource conservation and environmental protection benefits.

[0035] In addition, the stirring system inside the reactor achieves sufficient mixing and dispersion of the materials through the rotation of the stirring shaft 25, thereby improving the reaction rate and conversion rate, making the gas phase polymerization reaction of polypropylene more efficient; and the coordinated work of the electric heating block 18 and the temperature sensor 19 further improves the filtration efficiency and system stability, ensuring the smooth and reliable operation of the entire reaction process.

[0036] Specifically, in this embodiment, the present solution mainly includes a reactor body 1. In the polypropylene gas-phase fluidized bed reactor, first, a gas-phase polymerization reaction of polypropylene is carried out in the reactor body 1, generating exhaust gas containing unreacted gas, dust particles and other impurities. This exhaust gas is discharged through an exhaust channel 2 connected to the inner cavity of the reactor body 1 and enters a filtering mechanism for purification.

[0037] The core of the filtration mechanism is the filter box 3 arranged beside the reactor body 1. The filter box 3 is divided into an independent upper filter chamber 5 and a lower filter chamber 6 by a partition 4. When the exhaust gas containing impurities enters the lower filter chamber 6, it first undergoes preliminary filtration to remove larger particles and impurities. The water in the water tank 7 is transported to the upper position of the lower filter chamber 6 through the spray pipe 8 and evenly sprayed by the spray head 9. The spray water contacts the dust particles in the gas entering the lower filter chamber 6, moistening the dust particles and settling them to the bottom of the lower filter chamber 6. At the same time, the rotating shaft 11 and the stirring blade 12 are rotated by the first motor 27, further promoting the mixing and sedimentation of dust particles and the spray water, thereby improving the filtration efficiency.

[0038] The gas after spraying and stirring is recovered by the fan 17 to the upper filter chamber 5 for more detailed filtration, while the dust particles and water deposited at the bottom of the lower filter chamber 6 are returned to the water tank 7 through the recovery pipe 10 for recycling after treatment.

[0039] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the filtering mechanism also includes: a plurality of filter layers 13 arranged in the upper filter cavity 5, and the plurality of filter layers 13 are arranged in parallel; the plurality of filter layers 13 are, from bottom to top, a polypropylene microporous filter membrane 14, an ultrafine fiber polypropylene filter membrane 15 and a polytetrafluoroethylene filter membrane 16.

[0040] In this embodiment, the preliminarily filtered gas first enters the upper filter chamber 5 through the fan 17. The exhaust gas first encounters the polypropylene microporous filter membrane 14, which has a larger pore size and can initially intercept and remove large particles and suspended solids from the gas. After being preliminarily filtered by the polypropylene microporous filter membrane 14, the gas continues to flow upward and enters the ultrafine fiber polypropylene filter membrane 15. This filter membrane is made of ultrafine fibers and has a higher porosity and finer filtration accuracy, which can further remove small particles and impurities from the gas, ensuring that the dust content in the gas is significantly reduced. Finally, after passing through the ultrafine fiber polypropylene filter membrane 15, the gas enters the polytetrafluoroethylene filter membrane 16. The polytetrafluoroethylene filter membrane 16 is known for its excellent chemical stability and corrosion resistance, and can effectively resist the erosion of corrosive gases or chemicals that may be present in the gas. At the same time, this filter membrane also has a certain filtering effect, which can further purify the gas. During the entire filtration process, the multiple filter layers 13 form a step-by-step filtration effect, with each layer performing a different filtration task, thereby achieving efficient gas purification.

[0041] In a further preferred embodiment of the present invention, Figure 1-4 As shown, an assembly groove is provided between the partitions 4 , and a fan 17 is installed in the assembly groove. One end of the fan 17 is connected to the upper filter chamber 5 , and the other end of the fan 17 is connected to the lower filter chamber 6 .

[0042] In this embodiment, when the fan 17 is started, it will generate a certain suction force or pressure difference, prompting the gas in the lower filter chamber 6 to accelerate and flow toward the upper filter chamber 5, promoting the circulation and uniform distribution of the gas in the filter box 3, reducing dead corners and blind spots, and ensuring that impurities in the exhaust gas are comprehensively and effectively removed.

[0043] In a further preferred embodiment of the present invention, Figure 1-4 As shown, a gas detection sensor 21 is provided at the upper position of the upper filter cavity 5, and an exhaust pipe 22 communicating with the inner cavity of the filter box 3 is provided at the top position of the filter box 3.

[0044] In this embodiment, the gas detection sensor 21 (A123-C3H6) is installed at the upper position of the upper filter cavity 5. This position is selected to ensure that the sensor can accurately detect the quality of the filtered gas.

[0045] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the side wall of the lower filter chamber 6 is provided with an electric heating block 18 and a temperature sensor 19, and the outer side wall of the reactor body 1 is provided with a display screen 20, which is electrically connected to the electric heating block 18, the temperature sensor 19 and the filtering mechanism.

[0046] In this embodiment, the function of the electric heating block 18 is to provide the necessary heat to maintain the appropriate temperature of the spray water in the lower filter chamber 6. The temperature of the spray water has a significant impact on the dust particle settling effect and filtration efficiency. By adjusting the heating power of the electric heating block 18, the temperature of the spray water can be precisely controlled, thereby optimizing the filtration effect.

[0047] Secondly, the temperature sensor 19 (PT100) is used to monitor the temperature of the spray water in real time; the temperature sensor 19 sends the collected temperature data to the display screen 20, and the display screen 20 automatically adjusts the heating power of the electric heating block 18 according to the preset temperature range and target value to keep the spray water running within the optimal temperature range; in addition, the display screen 20 is used to display the current spray water temperature, the operating status of the filter mechanism and any possible alarm information; the operator can understand the real-time situation of the filter mechanism by observing the information on the display screen 20, and make corresponding adjustments or interventions as needed.

[0048] In a further preferred embodiment of the present invention, Figure 1-4 As shown, the recovery pipe 10 , the spray pipe 8 and the exhaust pipe 22 are all provided with a one-way valve 23 .

[0049] In this embodiment, the decision to provide one-way valves 23 on the recovery duct 10, the spray pipe 8 and the exhaust pipe 22 not only improves the safety and reliability of the polypropylene gas-phase fluidized bed reactor, but also enhances the control accuracy and stability of the system; the synergistic effect of these one-way valves 23 ensures the orderly flow of the fluid inside the system and the smooth progress of the purification process.

[0050] In a further preferred embodiment of the present invention, Figure 1-4 As shown, a connecting rod 24 is rotatably fitted in the reactor body 1 , and a stirring shaft 25 is provided on the connecting rod 24 .

[0051] In this embodiment, the main function of the stirring shaft 25 is to promote the mixing and dispersion of materials inside the reactor. During the polypropylene gas phase polymerization reaction, the materials, including monomers, catalysts, etc., need to be fully mixed to ensure that the reaction proceeds uniformly. The rotation of the stirring shaft 25 can produce a strong stirring effect, causing the materials to form eddies or turbulence inside the reactor, thereby increasing the contact area and collision frequency between the materials, and improving the reaction rate and conversion rate.

[0052] In a further preferred embodiment of the present invention, Figure 1-4 As shown, a driving motor 26 is provided at the top of the reactor body 1 , and the output end of the driving motor 26 is fixedly connected to the end key of the connecting rod 24 .

[0053] In this embodiment, when the drive motor 26 is started, the rotational motion of its output end is transmitted to the connecting rod 24 through the key fixed connection, thereby driving the stirring shaft 25 to rotate inside the reactor. The rotation of the stirring shaft 25 will produce a strong stirring effect, so that the materials inside the reactor body 1 are fully mixed and dispersed. This mixing and dispersion effect helps to increase the reaction rate and conversion rate, thereby optimizing the entire reaction process.

[0054] In a further preferred embodiment of the present invention, Figure 1-4 As shown, an activated carbon adsorption layer is provided in the water tank 7.

[0055] In this embodiment, in the water tank 7, the water can be further processed through the activated carbon adsorption layer to remove residual tiny particles and impurities, ensuring that the water quality meets the standards for reuse.

[0056] Working Principle: In a polypropylene gas-phase fluidized bed reactor, first, the gas-phase polymerization reaction of polypropylene is carried out in the reactor body 1. This process produces exhaust gas containing unreacted gas, dust particles and other impurities. This exhaust gas is then guided to the filtration mechanism for purification through a special exhaust channel 2.

[0057] The core component of the filtration mechanism is the filter box 3 located next to the reactor body 1. The box is divided into two independent areas: an upper filter chamber 5 and a lower filter chamber 6 by a partition 4. When the exhaust gas containing impurities enters the lower filter chamber 6, it first undergoes a preliminary filtration stage, which aims to remove larger particles and impurities in the gas. At the same time, water in the water tank 7 is precisely transported to the upper part of the lower filter chamber 6 through the spray pipe 8 and evenly sprayed downward through the spray head 9. After the spray water contacts the dust particles in the gas, it uses the wetting effect to cause the dust particles to settle to the bottom of the lower filter chamber 6. To further improve the filtration efficiency, the rotating shaft 11 and the stirring blade 12 are rotated by the first motor 27. This action effectively promotes the mixing and settling of dust particles and the spray water.

[0058] After preliminary treatment in the lower filter chamber 6, the gas is recovered by the fan 17 and transported to the upper filter chamber 5 for more refined filtration. Within the upper filter chamber 5, the gas sequentially passes through a polypropylene microporous filter membrane 14, a microfiber polypropylene filter membrane 15, and a polytetrafluoroethylene filter membrane 16. These three filter membranes each perform different filtration tasks, creating a step-by-step filtration effect: the polypropylene microporous filter membrane 14 initially intercepts large impurities; the microfiber polypropylene filter membrane 15 further removes microparticles; and the polytetrafluoroethylene filter membrane 16, with its excellent chemical stability and corrosion resistance, ensures that the final exhaust gas is both clean and meets environmental standards.

[0059] To ensure the filtration effect, a gas detection sensor 21 is installed on the upper part of the upper filter chamber 5 to monitor the quality of the filtered gas in real time. At the same time, the electric heating block 18 and the temperature sensor 19 work together to maintain the appropriate temperature of the spray water in the lower filter chamber 6, thereby optimizing the dust particle settling effect and filtration efficiency. The display screen 20 serves as a window for human-computer interaction, displaying the spray water temperature, the operating status of the filter mechanism, and alarm information in real time, providing operators with a convenient means of monitoring and adjustment.

[0060] In addition, a one-way valve 23 is provided on the recovery duct 10, the spray pipe 8 and the exhaust pipe 22. This design not only improves the safety and reliability of the system, but also ensures the orderly flow of the fluid and the smooth progress of the purification process. Finally, when the drive motor 26 is started, its power is transmitted to the connecting rod 24 through a key-fixed connection, thereby driving the stirring shaft 25 to rotate inside the reactor, achieving sufficient mixing and dispersion of the materials, optimizing the reaction rate and conversion rate, and ensuring the efficient and stable operation of the polypropylene gas-phase fluidized bed reactor.

[0061] It should be noted that for the aforementioned embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should be aware that the present invention is not limited by the order of the actions described, because according to the present invention, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the division of the above-mentioned units. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the coupling or communication connection between each other shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunications or other forms.

[0063] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope to be protected by the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making any creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also fall within the scope to be protected by the present invention.

Claims

1. A polypropylene gas phase fluidized bed reactor, characterized in that: include: Reactor body; an exhaust passage connected to the inner cavity of the reactor body; a filtering mechanism disposed outside the reactor body; Wherein, the filtering mechanism includes: A filter box is arranged beside the reactor body; A partition is provided in the middle of the inner cavity of the filter box, and the partition separates the filter box into an independent upper filter cavity and a lower filter cavity; A water tank is provided on one side of the filter box away from the reactor body, and a spray pipe is connected between the water tank and the lower filter cavity, one end of the spray pipe extends to the lower position of the water tank, and the other end of the spray pipe extends to the upper position of the lower filter cavity and is connected to a plurality of spray heads; A recovery conduit is further connected between the lower filter chamber and the water tank, and the recovery conduit extends to the lower positions of the lower filter chamber and the water tank respectively; A rotating shaft is provided at the bottom of the lower filter chamber, wherein the rotating shaft and the lower filter chamber are in rotational engagement; a plurality of stirring blades arranged outside the rotating shaft; A first motor is arranged at the lower part of the filter box, and an output end of the first motor is fixedly connected with an end key of a rotating shaft.

2. A polypropylene gas-phase fluidized bed reactor according to claim 1, characterized in that: The filtering mechanism further comprises: A plurality of filter layers are arranged in the upper filter cavity, wherein the plurality of filter layers are arranged in parallel; The plurality of filter layers are, from bottom to top, polypropylene microporous filter membrane, ultrafine fiber polypropylene filter membrane and polytetrafluoroethylene filter membrane.

3. A polypropylene gas-phase fluidized bed reactor according to claim 2, characterized in that: An assembly groove is provided between the partitions, and a fan is installed in the assembly groove. One end of the fan is connected to the upper filter cavity, and the other end of the fan is connected to the lower filter cavity.

4. A polypropylene gas-phase fluidized bed reactor according to claim 2, characterized in that: A gas detection sensor is provided at the upper position of the upper filter cavity, and an exhaust pipe communicating with the inner cavity of the filter box is provided at the top position of the filter box.

5. A polypropylene gas-phase fluidized bed reactor according to claim 3, characterized in that: The side wall of the lower filter cavity is provided with an electric heating block and a temperature sensor, and the outer side wall of the reactor body is provided with a display screen, which is electrically connected to the electric heating block, the temperature sensor and the filter mechanism.

6. A polypropylene gas-phase fluidized bed reactor according to claim 4, characterized in that: The recovery conduit, the spray pipe and the exhaust pipe are all provided with a one-way valve.

7. A polypropylene gas-phase fluidized bed reactor according to claim 5, characterized in that: A connecting rod is rotatably fitted in the reactor body, and a stirring shaft is provided on the connecting rod.

8. A polypropylene gas-phase fluidized bed reactor according to claim 7, characterized in that: A driving motor is provided at the top of the reactor body, and an output end of the driving motor is fixedly connected to an end key of a connecting rod.

9. A polypropylene gas-phase fluidized bed reactor according to claim 7, characterized in that: An activated carbon adsorption layer is arranged in the water tank.

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