Polymerization reaction kettle with dry powder catalyst feeding system

Abstract

The utility model discloses a polymerization reaction kettle with a dry powder catalyst feeding system. The polymerization reaction kettle comprises a polymerization reaction kettle body, a feeding system, an emptying system, a nitrogen feeding system, a raw material feeding system and a vacuumizing system. The feeding system comprises a catalyst sampler and a catalyst feeder which are communicated through a first catalyst feeding pipe; the catalyst sampler and the catalyst feeder are both communicated with the first catalyst feeding pipe through a first pipeline joint; the catalyst feeder and the polymerization reaction kettle are communicated with a second catalyst feeding pipe through a second pipeline joint; the polymerization reaction kettle and the catalyst feeder are both communicated with the emptying system; the nitrogen feeding system is communicated with the catalyst feeder and the polymerization reaction kettle; the raw material feeding system is communicated with the polymerization reaction kettle and the catalyst feeder; and the vacuumizing system is communicated with the polymerization reaction kettle. According to the polymerization reaction kettle with the dry powder catalyst feeding system, disclosed by the utility model, catalyst residues are reduced, and the catalyst feeding accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, and more specifically to a polymerization reaction kettle with a dry powder catalyst feeding system. Background Art

[0002] In polymerization reactions, catalyst is the core, and dry powder catalyst needs to be accurately added through a catalyst feeder according to the demand of the polymerization reactor for the catalyst. The amount of catalyst added for each polymerization reaction is small. In the prior art, the upper and lower end interfaces of the catalyst feeder are directly welded to the pipeline. Since the inner diameter of the welding pipeline orifice is relatively small and there are uneven weld scars on the inner wall, the catalyst will remain on the weld scar when it is added to the polymerization reactor, resulting in inaccurate catalyst addition, unstable test data, and affecting the progress of the polymerization reaction.

[0003] Therefore, how to improve the accuracy of catalyst addition in the polymerization reaction and promote the progress of the polymerization reaction has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a polymerization reactor with a dry powder catalyst feeding system to improve the accuracy of catalyst feeding in the polymerization reaction and promote the progress of the polymerization reaction.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A polymerization reactor with a dry powder catalyst feeding system, comprising:

[0007] Polymerization reactor;

[0008] A feeding system, the feeding system includes a catalyst sampler and a catalyst feeder connected through a first catalyst feeding pipe, the catalyst sampler and the catalyst feeder are both connected to the first catalyst feeding pipe through a first pipe joint, and the catalyst sampler and the catalyst feeder are connected to the first pipe joint by threaded connection; the catalyst feeder is connected to the polymerization reactor through a second catalyst feeding pipe, the catalyst feeder and the polymerization reactor are both connected to the second catalyst feeding pipe through a second pipe joint, and the catalyst feeder and the polymerization reactor are connected to the second pipe joint by threaded connection;

[0009] Venting system, the polymerization reactor and the catalyst feeder are connected to the venting system;

[0010] A nitrogen feeding system, the nitrogen feeding system is connected with the catalyst feeder and the polymerization reactor;

[0011] A raw material feeding system, the raw material feeding system is connected with the polymerization reactor and the catalyst feeder;

[0012] A vacuum pumping system, which is connected to the polymerization reactor.

[0013] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, the first pipe joint includes pipe joint one and pipe joint two. The catalyst sampler is threadedly connected to pipe joint one, and pipe joint one is ferrule-connected to the first catalyst feeding pipe;

[0014] The catalyst feeder is threadedly connected to pipe joint two, and pipe joint two is ferrule-connected to the first catalyst feeding pipe.

[0015] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, the second pipe joint includes pipe joint three and pipe joint four. The catalyst feeder is threadedly connected to pipe joint three, and pipe joint three is ferrule-connected to the second catalyst feeding pipe;

[0016] The second catalyst feeding pipe is ferrule-connected to pipe joint four, and the polymerization reactor is threadedly connected to pipe joint four.

[0017] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, a first catalyst feeding valve and a second catalyst feeding valve are provided on the first catalyst feeding pipe, and the first catalyst feeding valve and the second catalyst feeding valve are connected through a quick connector.

[0018] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, a third catalyst feeding valve is provided on the second catalyst feeding pipe.

[0019] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, the venting system includes a first venting system and a second venting system. The catalyst feeder is connected to the first venting system, and a feeder venting valve and a venting system check valve are provided between the catalyst feeder and the first venting system;

[0020] The polymerization reactor is connected to the second venting system, and a reactor venting valve is provided between the polymerization reactor and the second venting system.

[0021] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, the catalyst feeder is connected to the nitrogen feeding system and the raw material feeding system through a first regulating valve.

[0022] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, a nitrogen supply valve and a nitrogen check valve are provided between the nitrogen feeding system and the first regulating valve;

[0023] A raw material supply valve and a raw material check valve are provided between the raw material feeding system and the first regulating valve;

[0024] Both the nitrogen feed system and the raw material feed system are connected to the polymerization reactor through a connecting valve.

[0025] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, both the catalyst sampler and the catalyst feeder are made of stainless steel, and the surface roughness Ra of their inner walls is ≤ 0.4.

[0026] Optionally, in the above-mentioned polymerization reactor with a dry powder catalyst feeding system, a pressure gauge is provided on the polymerization reactor, and the polymerization reactor includes a stirrer.

[0027] The polymerization reactor with a dry powder catalyst feeding system disclosed by the present utility model has a simple structure and convenient operation. The connection methods between the catalyst sampler, the catalyst feeder and the first pipe joint are all threaded connections. The connection methods between the catalyst feeder and the polymerization reactor and the second pipe joint are all threaded connections. The threaded connection method can reduce the occurrence of catalyst residue phenomenon. At the same time, the catalyst feeder can be evacuated through the vacuum system, so that the catalyst in the catalyst sampler is transferred to the catalyst feeder, which can further reduce the occurrence of catalyst residue phenomenon and improve the accuracy of catalyst feeding. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic structural diagram of a polymerization reactor with a dry powder catalyst feeding system disclosed by an embodiment of the present utility model.

[0030] Among them, 100 is the polymerization reactor, 110 is the stirrer, 120 is the pressure gauge, and 130 is the second regulating valve;

[0031] 200 is the feeding system, 210 is the catalyst sampler, 220 is the catalyst feeder, 230 is the first catalyst feeding pipe, 240 is the second catalyst feeding pipe, 250 is the first catalyst feeding valve, 260 is the second catalyst feeding valve, and 270 is the third catalyst feeding valve;

[0032] 300 is the venting system, 310 is the first venting system, 320 is the second venting system, 330 is the feeder venting valve, 340 is the check valve of the venting system, and 350 is the venting valve of the reactor;

[0033] 400 is a nitrogen feeding system, 410 is a first regulating valve, 420 is a nitrogen supply valve, 430 is a nitrogen check valve, and 440 is a connecting valve;

[0034] 500 is a raw material feeding system, 510 is a raw material supply valve, and 520 is a raw material check valve;

[0035] 600 is a vacuum pumping system, and 610 is a vacuum pumping valve. Detailed implementation manners

[0036] In addition to the problems mentioned in the background art, in the prior art, there are also problems that the inner wall of the catalyst feeder is rough, the smoothness is insufficient, and the catalyst adheres to the wall, resulting in inaccurate catalyst feeding.

[0037] The core of the present utility model lies in disclosing a polymerization reactor with a dry powder catalyst feeding system to improve the accuracy of catalyst feeding in the polymerization reaction and promote the progress of the polymerization reaction.

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0039] As Figure 1 shown, the embodiment of the present utility model discloses a polymerization reactor with a dry powder catalyst feeding system, including a polymerization reactor 100, a feeding system 200, a venting system 300, a nitrogen feeding system 400, a raw material feeding system 500, and a vacuum pumping system 600.

[0040] Among them, the feeding system 200 includes a catalyst sampler 210 and a catalyst feeder 220. The catalyst sampler 210 is connected to the catalyst feeder 220 through a first catalyst feeding pipe 230, and the catalyst feeder 220 is connected to the polymerization reactor 100 through a second catalyst feeding pipe 240. The catalyst sampler 210 stores the catalyst. During use, first, the catalyst in the catalyst sampler 210 is transferred into the catalyst feeder 220, and then added into the polymerization reactor 100.

[0041] In order to reduce the occurrence of catalyst residue in the prior art, the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiments of the present utility model has that the catalyst sampler 210 and the catalyst feeder 220 are both connected to the first catalyst feeding pipe 230 through the first pipe joint, and the connection manners of the catalyst sampler 210 and the catalyst feeder 220 with the first pipe joint are both threaded connections. The threaded connection manner can reduce the phenomenon of catalyst remaining in the weld scar in the prior art and improve the accuracy of catalyst feeding.

[0042] Both the catalyst feeder 220 and the polymerization reactor 100 are connected to the venting system 300, and the venting system 300 is used to evacuate the media in the polymerization reactor 100 and the catalyst feeder 220. The nitrogen feeding system 400 is connected to both the catalyst feeder 220 and the polymerization reactor 100 and is used to introduce nitrogen into the catalyst feeder 220 and the polymerization reactor 100 to perform nitrogen replacement on both. The raw material feeding system 500 is connected to both the catalyst feeder 220 and the polymerization reactor 100 and is used to introduce the raw materials required for the polymerization reaction into the polymerization reactor 100 and the catalyst feeder 220. The vacuum pumping system 600 is connected to the polymerization reactor 100 and can evacuate the polymerization reactor 100 and the catalyst feeder 220 to make the polymerization reactor 100 and the catalyst feeder 220 in a negative pressure state.

[0043] When the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiments of the present utility model is in use, first, the nitrogen feeding system 400 and the venting system 300 are used to perform nitrogen replacement on the polymerization reactor 100 and the catalyst feeder 220; and keep both at a slightly positive pressure. Subsequently, the vacuum pumping system is turned on to evacuate the polymerization reactor 100 and the catalyst feeder 220 to keep the polymerization reactor 100 and the catalyst feeder 220 in a negative pressure state.

[0044] Then, the nitrogen feeding system 400 is used to perform nitrogen replacement on the first catalyst feeding pipe 230. Subsequently, the venting system is used to make the catalyst feeder 220 in a slightly positive pressure state, and the polymerization reactor 100 is used to make the catalyst feeder 220 in a negative pressure state. Then, under the negative pressure state, the catalyst in the catalyst sampler 210 is transferred to the catalyst feeder 220.

[0045] Subsequently, the raw materials pretreated in the first batch are introduced into the polymerization reactor 100 through the raw material feeding system 500, and then the raw materials pretreated in the second batch are introduced into the catalyst feeder 220. The raw materials pretreated in the second batch bring the catalyst into the polymerization reactor 100, and all the pretreated raw materials undergo a polymerization reaction in the polymerization reactor 100.

[0046] The polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiment of the present invention has a simple structure and convenient operation. The threaded connection method can reduce the occurrence of catalyst residue. At the same time, when the catalyst feeder 220 is in a negative pressure state, transferring the catalyst in the catalyst sampler 210 into the catalyst feeder 220 can reduce the residue of the catalyst in the catalyst sampler 210. Bringing the catalyst into the polymerization reactor 100 by the raw materials to be processed in the second batch can further reduce the occurrence of catalyst residue and improve the accuracy of catalyst feeding.

[0047] In the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiment of the present invention, the first pipe joint includes pipe joint one and pipe joint two. The catalyst sampler 210 is threadedly connected to pipe joint one, pipe joint one is connected to the first catalyst feeding pipe 230 by a ferrule connection, the catalyst feeder 220 is threadedly connected to pipe joint two, and pipe joint two is connected to the first catalyst feeding pipe 230 by a ferrule connection.

[0048] The second pipe joint includes pipe joint three and pipe joint four. The catalyst feeder 220 is threadedly connected to pipe joint three, pipe joint three is connected to the second catalyst feeding pipe 240 by a ferrule connection, the second catalyst feeding pipe 240 is connected to pipe joint four by a ferrule connection, and the polymerization reactor 100 is threadedly connected to pipe joint four. The threaded connection method can reduce the phenomenon of catalyst residue at the weld scar in the prior art, and the threaded connection and ferrule connection methods are convenient to operate and can improve the installation efficiency. It should be noted that the thread mentioned here is preferably NPT internal thread (a kind of American standard 60-degree taper pipe thread).

[0049] As Figure 1 shown, in the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiment of the present invention, the first catalyst feeding pipe 230 is provided with a first catalyst feeding valve 250 and a second catalyst feeding valve 260. The first catalyst feeding valve 250 is arranged at the outlet position of the catalyst sampler 210, and the second catalyst feeding valve 260 is arranged at the inlet position of the catalyst feeder 220. The first catalyst feeding valve 250 and the second catalyst feeding valve 260 are connected by a quick connector. The setting of the quick connector can enable the catalyst sampler 210 and the catalyst feeder 220 to be quickly connected and disassembled. The first catalyst feeding valve 250 and the second catalyst feeding valve 260 are preferably ball valves.

[0050] To control the connection between the catalyst feeder 220 and the polymerization reactor 100, a third catalyst feeding valve 270 is provided on the second catalyst feeding pipe 240. The third catalyst feeding valve 270 is preferably a ball valve.

[0051] In the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiment of the present utility model, the venting system 300 includes a first venting system 310 and a second venting system 320. The catalyst feeder 220 is connected to the first venting system 310, and a feeder venting valve 330 and a venting system check valve 340 are provided between the catalyst feeder 220 and the first venting system 310. The feeder venting valve 330 can control the discharge of the medium in the catalyst feeder 220, and the venting system check valve 340 can prevent the discharged medium from flowing back. The polymerization reactor 100 is connected to the second venting system 320, and a reactor venting valve 350 is provided between the polymerization reactor 100 and the second venting system 320. The reactor venting valve 350 can control the discharge of the medium in the polymerization reactor 100.

[0052] To regulate the flow rates of nitrogen and raw materials entering the catalyst feeder 220, the catalyst feeder 220 is connected to the nitrogen feeding system 400 and the raw material feeding system 500 through a first regulating valve 410. A nitrogen supply valve 420 and a nitrogen check valve 430 are provided between the nitrogen feeding system 400 and the first regulating valve 410. The nitrogen supply valve 420 can control the supply of nitrogen, and the nitrogen check valve 430 can prevent nitrogen from flowing back. A raw material supply valve 510 and a raw material check valve 520 are provided between the raw material feeding system 500 and the first regulating valve 410. The raw material supply valve 510 can control the supply of raw materials, and the raw material check valve 520 can prevent raw materials from flowing back. Through the cooperation of the nitrogen supply valve 420 and the raw material supply valve 510, the first regulating valve 410 can achieve the switching between nitrogen and raw materials. To improve the regulation accuracy, the first regulating valve 410 is preferably a needle valve. The nitrogen supply valve 420 and the raw material supply valve 510 are preferably ball valves.

[0053] In some specific embodiments, both the catalyst sampler 210 and the catalyst feeder 220 are made of stainless steel material. The stainless steel is preferably 316L, and the surface roughness Ra of the inner walls of both is ≤0.4. This setting method can reduce the phenomenon of catalyst sticking to the wall, reduce the residue of the catalyst, and improve the accuracy of catalyst feeding.

[0054] To measure the pressure inside the polymerization reactor 100 in real time, a pressure gauge 120 is provided on the reactor 100, and a second regulating valve 130 is provided on the instrument pipe of the pressure gauge 120. The second regulating valve 130 is preferably a needle valve. To ensure the progress of the polymerization reaction, the polymerization reactor 100 includes a stirrer 110. After the raw materials pretreated in the first batch enter the polymerization reactor 100, the stirrer 110 is turned on to stir the raw materials pretreated in the first batch. During the polymerization reaction, the stirrer 110 remains in the stirring state all the time.

[0055] The working process of the polymerization reactor with a dry powder catalyst feeding system disclosed in the embodiments of the present invention is as follows:

[0056] First, open the third catalyst feeding valve 270 between the catalyst feeder 220 and the polymerization reactor 100, open the second regulating valve 130 under the pressure gauge 120, ensure that all other valves connected to the polymerization reactor 100 are in the closed state, open the nitrogen supply valve 420 and the communication valve 440, and introduce nitrogen into the polymerization reactor 100. After the pressure in the polymerization reactor 110 meets the process requirements, open the reactor vent valve 350 to perform nitrogen replacement on the polymerization reactor 100. Then, close the nitrogen supply valve 420 and the communication valve 440. After discharging the pressure in the polymerization reactor 100 to a slightly positive pressure, close the reactor vent valve 350. After that, open the vacuum pump valve 610 to evacuate the polymerization reactor 100 and make the pressure reach about -100 KPa, preferably -100 KPa. When the pressure of the pressure gauge 120 reaches -100 KPa, close the third catalyst feeding valve 270 between the catalyst feeder 220 and the polymerization reactor 100, and close the vacuum pump valve 610 to complete the replacement work of the polymerization reactor 100 and the catalyst feeder 220.

[0057] Open the nitrogen supply valve 420 and the first regulating valve 410. Nitrogen passes through the nitrogen check valve 430 and enters the catalyst feeder 220. Open the feeder vent valve 330 and slowly open the second catalyst feeding valve 260, and then close the feeder vent valve 330. Adjust the opening degree of the first regulating valve 410 so that the catalyst feeder 220 is in a slightly positive pressure exhaust state. Then, under the protection of nitrogen, connect the catalyst sampler 210 to the catalyst feeder 220 through a quick connector, and complete the nitrogen displacement between the outlet of the first catalyst feeding valve 250 and the catalyst feeder 220 through the feeder vent valve 330. Then, close the nitrogen supply valve 420 and the first regulating valve 410 in sequence. Open the feeder vent valve 330 to exhaust the gas inside the catalyst feeder 220 to a slightly positive pressure, and then close the feeder vent valve 330. Open the third catalyst feeding valve 270, use the negative pressure in the polymerization reactor 100 to convert the catalyst feeder 220 from a slightly positive pressure to a negative pressure state and record the pressure of the pressure gauge 120. Then, close the third catalyst feeding valve 270. Open the first catalyst feeding valve 250 between the catalyst sampler 210 and the catalyst feeder 220 to transfer the catalyst into the catalyst feeder 220. After that, close the first catalyst feeding valve 250 and the second catalyst feeding valve 260, and remove the catalyst sampler 210. At this time, all the catalyst has been transferred into the catalyst feeder 220.

[0058] Open the raw material supply valve 510 and the connecting valve 440. Pass the raw materials pretreated in the first batch through the raw material check valve 520 and into the polymerization reactor 100. After the introduction of the raw materials pretreated in the first batch is completed, close the raw material supply valve 510 and the connecting valve 440. Start the stirrer 110. Then, adjust the first regulating valve 410 to the fully open state. Quickly open the raw material supply valve 510 and the third catalyst feeding valve 270, and introduce the catalyst into the polymerization reactor 100 with the raw materials pretreated in the second batch according to the process requirements. After the addition of the raw materials pretreated in the second batch is completed, close the raw material supply valve 510 and the third catalyst feeding valve 270. Open the feeder vent valve 330 to empty the medium inside the catalyst feeder 220. Then, open the nitrogen supply valve 420 and complete the nitrogen replacement of the catalyst feeder 220 by switching the nitrogen supply valve 420 and the feeder vent valve 330. Close the feeder vent valve 330, the nitrogen supply valve 420, and the first regulating valve 410 to make the catalyst feeder 220 in a positive pressure standby state.

[0059] It should be noted that the various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0060] As shown in this application and the claims, unless the context clearly indicates otherwise, words such as "a", "an", "one", and / or "the" are not specifically singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. A process, method, article, or device may also include other steps or elements. An element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article, or device that includes the element.

[0061] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0062] In this article, specific examples are used to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the core idea of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A polymerization reactor with a dry powder catalyst feeding system, characterized in that, Comprising: A polymerization reactor (100); A feeding system (200), the feeding system (200) includes a catalyst sampler (210) and a catalyst feeder (220) connected through a first catalyst feeding pipe (230). The catalyst sampler (210) and the catalyst feeder (220) are both connected to the first catalyst feeding pipe (230) through a first pipe joint, and the connection modes of the catalyst sampler (210) and the catalyst feeder (220) with the first pipe joint are both threaded connections; the catalyst feeder (220) is connected to the polymerization reactor (100) through a second catalyst feeding pipe (240). The catalyst feeder (220) and the polymerization reactor (100) are both connected to the second catalyst feeding pipe (240) through a second pipe joint, and the connection modes of the catalyst feeder (220) and the polymerization reactor (100) with the second pipe joint are both threaded connections; A venting system (300), both the polymerization reactor (100) and the catalyst feeder (220) are connected to the venting system (300); A nitrogen feeding system (400), the nitrogen feeding system (400) is connected to both the catalyst feeder (220) and the polymerization reactor (100); A raw material feeding system (500), the raw material feeding system (500) is connected to both the polymerization reactor (100) and the catalyst feeder (220); A vacuum pumping system (600), the vacuum pumping system (600) is connected to the polymerization reactor (100); The first pipe joint includes a pipe joint one and a pipe joint two. The catalyst sampler (210) is threadedly connected to the pipe joint one, and the pipe joint one is connected to the first catalyst feeding pipe (230) by a ferrule connection; The catalyst feeder (220) is threadedly connected to the pipe joint two, and the pipe joint two is connected to the first catalyst feeding pipe (230) by a ferrule connection; under a negative pressure state, the catalyst in the catalyst sampler (210) is transferred to the catalyst feeder (220); Both the catalyst sampler (210) and the catalyst feeder (220) are made of stainless steel material, and the surface roughness Ra of their inner walls is ≤ 0.

4.

2. The polymerization reactor with a dry powder catalyst feeding system as described in claim 1, characterized in that, The second pipe joint includes a pipe joint three and a pipe joint four. The catalyst feeder (220) is threadedly connected to the pipe joint three, and the pipe joint three is connected to the second catalyst feeding pipe (240) by a ferrule connection; The second catalyst feeding pipe (240) is connected to the pipe joint four by a ferrule connection, and the polymerization reactor (100) is threadedly connected to the pipe joint four.

3. The polymerization reactor with a dry powder catalyst feeding system according to claim 2, characterized in that, A first catalyst feeding valve (250) and a second catalyst feeding valve (260) are provided on the first catalyst feeding pipe (230), and the first catalyst feeding valve (250) and the second catalyst feeding valve (260) are connected through a quick connector.

4. The polymerization reactor with a dry powder catalyst feeding system according to claim 1, characterized in that, A third catalyst feeding valve (270) is provided on the second catalyst feeding pipe (240).

5. The polymerization reactor with a dry powder catalyst feeding system as described in claim 1, characterized in that, The venting system (300) includes a first venting system (310) and a second venting system (320). The catalyst feeder (220) is communicated with the first venting system (310), and a feeder venting valve (330) and a venting system check valve (340) are provided between the catalyst feeder (220) and the first venting system (310). The polymerization reactor (100) is communicated with the second venting system (320), and a reactor venting valve (350) is provided between the polymerization reactor (100) and the second venting system (320).

6. The polymerization reactor with a dry powder catalyst feeding system according to claim 1, characterized in that, The catalyst feeder (220) is communicated with the nitrogen feeding system (400) and the raw material feeding system (500) through a first regulating valve (410).

7. The polymerization reactor with a dry powder catalyst feeding system according to claim 6, wherein, A nitrogen supply valve (420) and a nitrogen check valve (430) are provided between the nitrogen feeding system (400) and the first regulating valve (410). A raw material supply valve (510) and a raw material check valve (520) are provided between the raw material feeding system (500) and the first regulating valve (410). Both the nitrogen feeding system (400) and the raw material feeding system (500) are communicated with the polymerization reactor (100) through a connecting valve (440).

8. A polymerization reactor with a dry powder catalyst feeding system according to any one of claims 1-7, characterized in that, A pressure gauge (120) is provided on the polymerization reactor (100), and the polymerization reactor (100) includes a stirrer (110).

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