Vacuum condensing and filtering device

Abstract

The utility model relates to a vacuum condensing and filtering device which comprises a condenser and a condensing filter, the condenser comprises an outer cylinder, an inner cylinder and a cooling piece, and an inlet is formed in the side part of the outer cylinder; the lower end of the inner cylinder is located in the outer cylinder, the lower end of the inner cylinder is open, the upper end of the inner cylinder extends out of the outer cylinder, and the inner cylinder located outside the outer cylinder is provided with an air outlet; the cooling part comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell, a circulation space for circulation of a cooling medium is formed between the outer shell and the inner shell, and a through hole is formed in the middle of the inner shell, penetrates through the upper end and the lower end of the cooling part and is communicated with the circulation space of the inner barrel; the condensation filter comprises a condensation cylinder and a filtering piece, an inlet of the condensation cylinder is communicated with the air outlet of the inner cylinder, and an outlet of the condensation cylinder is communicated with the vacuum pump. According to the vacuum condensing and filtering device provided by the utility model, mixed steam from the reaction kettle sequentially passes through the condenser and the condensing filter, so that byproducts in the mixed steam are removed, the byproducts are prevented from entering the vacuum pump and the vacuum pipeline, and the hidden danger of production is eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a vacuum condensation filtering device. BACKGROUND

[0002] In the vacuumizing process of the polymeric polycondensation reactor, the small molecular by-products phenol, a small amount of oligomers and unreacted excess distillate phenol generated in the polycondensation process in the reactor enter the vacuum system in the vacuumizing process of the vacuum pump, the freezing point of the distillate is high, and the distillate will freeze in the vacuum pipeline and the vacuum pump after leaving the high-temperature reactor, thereby blocking the pipeline and causing unstable vacuum control, which cannot meet the long-time stable high-vacuum requirement of continuous production. SUMMARY

[0003] The utility model discloses a vacuum condensation filtering device, effectively solve the polyreaction process in the small molecular by-products phenol, a small amount of oligomers and unreacted excess distillate phenol generated in the polycondensation process in the vacuum pump's vacuumizing process in the vacuum system, cause the problem of unstable vacuum control, which cannot meet the long-time stable high-vacuum requirement of continuous production.

[0004] To achieve the above object, the utility model adopts the technical scheme of:

[0005] A vacuum condensation filtering device, comprising:

[0006] A condenser is used for communicating with the reactor, and the condenser comprises an outer cylinder, an inner cylinder and a cooling member. The outer cylinder is provided with a condensing jacket on the outer periphery, the condensing jacket is used for containing cooling medium, and the side of the outer cylinder has an inlet. The inner cylinder has a flow-through space, the lower end of the inner cylinder is located in the outer cylinder, the lower end of the inner cylinder is open, the upper end of the inner cylinder extends out of the outer cylinder, and the inner cylinder outside the outer cylinder has an air outlet.

[0007] The cooling member is located in the outer cylinder and connected with the lower end of the inner cylinder, and the lower end of the cooling member has a spacing with the inner bottom of the outer cylinder. The cooling member comprises an outer shell and an inner shell, the inner shell is arranged in the outer shell, a flow-through space for cooling medium is formed between the outer shell and the inner shell, a through hole is formed in the middle of the inner shell, the through hole penetrates the upper end and the lower end of the cooling member, the through hole is communicated with the flow-through space of the inner cylinder, and the through hole comprises a first section and a second section connected below the first section. The first section is tapered from wide at the top to narrow at the bottom, and the second section is tapered from narrow at the top to wide at the bottom.

[0008] The condensing filter comprises a condensing cylinder, a filter element, the inlet of the condensing cylinder is communicated with the gas outlet of the inner cylinder, the outlet of the condensing cylinder is communicated with a vacuum pump, and a cooling jacket is arranged on the outer periphery of the condensing cylinder.

[0009] When the device works, the gas flow passes through the outer cylinder, the through hole of the cooling element, the inner cylinder in sequence, and flows out from the gas outlet of the inner cylinder into the condensing cylinder.

[0010] According to some embodiments of the utility model, the device further comprises an air inlet pipe, one end of the air inlet pipe is communicated with the reaction kettle, the other end of the air inlet pipe is communicated with the inlet of the outer cylinder, and the air inlet pipe extends downwardly and obliquely towards the outer cylinder.

[0011] According to some embodiments of the utility model, the shell is in a cylindrical shape.

[0012] According to some embodiments of the utility model, the outer cylinder comprises a first cylinder body and a second cylinder body, the diameters of the first cylinder body are consistent, the second cylinder body is located at the lower end of the first cylinder body, and the diameters of the second cylinder body gradually decrease from top to bottom.

[0013] According to some embodiments of the utility model, the condensing cylinder is communicated with the gas outlet of the inner cylinder through a communication pipeline, the communication pipeline extends downwardly and obliquely towards the condensing cylinder, and a valve is arranged on the communication pipeline.

[0014] According to some embodiments of the utility model, the condensing cylinder is divided into a first cavity and a second cavity through a partition plate, the first cavity is located above the second cavity, a guide cylinder is arranged in the second cavity, a through hole is formed in the partition plate, the upper end of the guide cylinder is connected with the through hole of the partition plate, the guide cylinder has a hollow cavity, a mounting hole for mounting the filter element is formed in the upper end surface of the guide cylinder, and the lower end of the guide cylinder is open; the filter element is vertically arranged in the guide cylinder, the filter element is a tubular filter screen, and the filter element is communicated with the first cavity.

[0015] According to some embodiments of the utility model, the device further comprises a scraping assembly, the scraping assembly comprises a scraper and a driving element, the scraper is located in the inner cylinder, the scraper is attached to the inner side of the cylinder wall of the inner cylinder, the driving element is located outside the outer cylinder, and the driving element is connected with the scraper for driving the scraper to move along the height direction of the inner cylinder.

[0016] According to some embodiments of the utility model, the scraper is a disc, and the circumferential profile surface of the scraper is attached to the inner side of the cylinder wall of the inner cylinder.

[0017] According to some embodiments of the utility model, the device further comprises a first impurity collection container, which is in communication with the outlet of the outer cylinder.

[0018] According to some embodiments of the utility model, the device further comprises a second impurity collection container, which is located below the condensing cylinder and in communication with the outlet of the condensing cylinder.

[0019] Thanks to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0020] The vacuum condensing and filtering device provided by the utility model removes by-products in the mixed steam from the reaction kettle in sequence through the condenser and the condensing filter, prevents the by-products from entering the vacuum pump and the vacuum pipeline, eliminates production hazards, and improves production stability; achieves the purpose of continuous production; improves the effect of polymerization reaction, improves product quality; effectively reduces the workload of personnel cleaning the vacuum pipeline and cleaning the internal scale of the vacuum pump; reduces the equipment failure rate, and prevents the vacuum equipment from stopping due to corrosion failure. BRIEF DESCRIPTION OF DRAWINGS

[0021] ATTACHED Figure 1 The structure diagram of the vacuum condensing and filtering device and the reaction kettle provided by the utility model is provided.

[0022] ATTACHED Figure 2 The sectional view of the vacuum condensing and filtering device provided by the utility model is provided.

[0023] ATTACHED Figure 3 The structure diagram of the condenser of the vacuum condensing and filtering device provided by the utility model is provided.

[0024] ATTACHED Figure 4 The enlarged view of the cooling member in the drawings is provided.

[0025] ATTACHED Figure 5 The structure diagram of the condensing filter of the vacuum condensing and filtering device provided by the utility model is provided.

[0026] ATTACHED Figure 6 The front view of the vacuum condensing and filtering device and the reaction kettle provided by the utility model is provided.

[0027] ATTACHED Figure 7 The sectional view of the vacuum condensing and filtering device provided by the utility model is provided.

[0028] ATTACHED Figure 8 The structure diagram of the condenser of the vacuum condensing and filtering device provided by the utility model is provided.

[0029] Appendix Figure 9 A front view of the condenser in the vacuum condensation and filtration device provided by this utility model;

[0030] Appendix Figure 10 A top view of the condenser in the vacuum condensation and filtration device provided by this utility model;

[0031] Appendix Figure 11 A first-view structural diagram of the cooling component of the vacuum condensation filtration device provided by this utility model;

[0032] Appendix Figure 12 A structural view of the cooling component of the vacuum condensation filtration device provided by this utility model from a second perspective.

[0033] Appendix Figure 13 Structural diagram of the guide cylinder of the vacuum condensation filtration device provided by this utility model;

[0034] Appendix Figure 14 Structural diagram of the filter element of the vacuum condensation filtration device provided by this utility model;

[0035] Appendix Figure 15 A structural diagram of another structure of the condenser filter of the vacuum condensation filtration device provided by this utility model.

[0036] In the attached diagrams above:

[0037] 1-Condenser, 11-First cylinder, 12-Second cylinder, 13-Cooling component, 131-Outer shell, 1311-Liquid inlet, 1312-Liquid outlet, 132-First section, 133-Second section, 14-Inner cylinder, 15-Air inlet pipe, 16-Condensing jacket, 17-Baffle;

[0038] 2-Condensation filter, 21-First chamber, 22-First part, 23-Second part, 24-Filter element, 25-Guide cylinder, 251-Mounting hole, 26-Baffle, 27-Cooling jacket;

[0039] 3-Scraper; 4-Driver; 5-Connecting pipe; 6-Valve; 7-Reaction vessel; 8-Gas collection bag; 9-First impurity collection container; 10-Second impurity collection container. Detailed Implementation

[0040] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0041] In the description of the utility model, it is necessary to explain that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0042] Referring to Figures 1 to 15 The vacuum condensation filter device shown in the figure, the device comprises a condenser 1, a condensation filter 2, wherein:

[0043] The reaction kettle 7 is communicated with the gas collecting pack 8, the gas collecting pack 8 is communicated with the condenser 1, and the mixed steam (including small molecule by-product phenol, a small amount of oligomer and unreacted excess distillate phenol by-product) generated by polymerization reaction in the reaction kettle 7 enters the condenser 1 through the gas collecting pack 8.

[0044] Referring to Figures 1-3 The condenser 1 comprises an outer cylinder, an inner cylinder 14 and a cooling piece 13, and the height direction of the outer cylinder is the up-down direction. The outer periphery of the outer cylinder is provided with a condensation jacket 16, and the condensation jacket 16 is used for containing a cooling medium to condense the gas flow reactant entering the inside of the outer cylinder; the outer cylinder has an inlet and an outlet, the inlet is arranged at the side of the outer cylinder, and the arrangement position of the inlet is higher than that of the outlet, and the outlet is located at the bottom of the outer cylinder.

[0045] The inner cylinder 14 is a hollow cylindrical shape, the inner cylinder 14 has a flow-through space, the lower end of the inner cylinder 14 is located in the outer cylinder, the lower end of the inner cylinder 14 is open, that is, the lower end of the inner cylinder 14 is through with the flow-through space; the upper end of the inner cylinder 14 extends out of the outer cylinder by a distance, the inner cylinder 14 located outside the outer cylinder has a gas outlet, the upper end of the inner cylinder 14 located outside the outer cylinder is sealed, and the gas outlet is arranged on the annular peripheral wall of the outer cylinder; the height direction of the inner cylinder 14 is consistent with the height direction of the outer cylinder, and the height direction of the inner cylinder 14 is the up-down direction; the height of the inner cylinder 14 located in the outer cylinder is less than the height of the outer cylinder.

[0046] The cooling member 13 is located in the outer cylinder, and the cooling member 13 is located below the inner cylinder 14 and connected with the lower end of the inner cylinder 14, and there is no gap between the lower end of the inner cylinder 14 and the upper end of the cooling member 13; the cooling member 13 comprises an outer shell 131 and an inner shell, the inner shell is arranged in the outer shell 131, the outer shell 131 and the inner shell are integrally formed, a flow-through space for the cooling medium to flow through is formed between the outer shell 131 and the inner shell, the outer shell 131 is provided with a liquid inlet 1311 and a liquid outlet 1312, the liquid inlet 1311 is used for introducing the cooling medium, and the liquid outlet 1312 is used for discharging the cooling medium; a through hole is formed in the middle of the inner shell, the through hole penetrates the upper end and the lower end of the cooling member 13, the through hole is communicated with the flow-through space of the inner cylinder 14, and the through hole and the inner cylinder 14 both extend along the height direction of the outer cylinder, the through hole comprises a first section 132 and a second section 133 connected below the first section 132, the first section 132 and the second section 133 are arranged above and below, and the first section 132 and the second section 133 are preferably integrally formed, the first section 132 is in a tapered shape with a width increasing from top to bottom, and the second section 133 is in a tapered shape with a width decreasing from top to bottom, like a sandglass.

[0047] The lower end of the cooling member 13 has a spacing with the inner bottom of the outer cylinder, and the spacing forms the flow-through space.

[0048] When the device works, the gas flow in the reaction kettle 7 enters the outer cylinder in sequence through the gas collecting bag 8 and the inlet of the outer cylinder, then flows downward along the outer cylinder to below the cooling member 13, then enters the through hole of the cooling member 13 through the spacing between the lower end of the cooling member 13 and the inner bottom of the outer cylinder, then flows upward along the through hole into the inner cylinder 14, and then flows upward along the inner cylinder 14, and finally is discharged to the condensing filter 2 through the gas outlet of the inner cylinder 14.

[0049] The advantage of arranging the cooling member 13 is that the gas flow entering the through hole of the cooling member 13 through the spacing between the lower end of the cooling member 13 and the inner bottom of the outer cylinder is compressed when flowing upward, which not only reduces the temperature, but also increases the resistance of the gas flow to better cool and faster produce impurities and residues.

[0050] In this example, the outer cylinder comprises a first cylinder body 11 and a second cylinder body 12, the diameters of the first cylinder body 11 are consistent, the inlet is arranged on the first cylinder body 11, and the lower end of the inner cylinder 14 and the cooling member 13 are both located in the first cylinder body 11; the second cylinder body 12 is located at the lower end of the first cylinder body 11, the diameter of the second cylinder body 12 gradually decreases from top to bottom, and the outlet is arranged on the second cylinder body 12, so that the time of the gas flow in the outer cylinder and the inner cylinder 14 is increased, which is beneficial to condensation.

[0051] The condensing filter 2 comprises a condensing cylinder, a filter 24, an inlet of the condensing cylinder being communicated with the gas outlet of the inner cylinder 14, and an outlet of the condensing cylinder being communicated with the vacuum pump; a cooling jacket 27 is arranged on the outer periphery of the condensing cylinder, and the filter 24 is arranged in the condensing cylinder and used for filtering impurities. Small molecular by-products phenol, a small amount of oligomers and unreacted excess distillate phenol generated in the condensation reaction in the reaction kettle 7 are sequentially introduced into the condenser 1 and the condensing filter 2 in the vacuum pumping process of the vacuum pump, and the condenser 1 and the condensing cylinder are in a negative pressure state under the action of the vacuum pump.

[0052] In some embodiments, referring to Figure 5 , the condensing cylinder specifically comprises a cavity, and the condensing cylinder is divided into a first cavity 21 and a second cavity by a partition plate 26, the first cavity 21 is located above the second cavity, an outlet is arranged on the first cavity 21, and an inlet is arranged on the second cavity; a through hole is arranged on the partition plate 26, a guide cylinder 25 is arranged in the second cavity, an upper end of the guide cylinder 25 is connected with the through hole of the partition plate 26, the guide cylinder 25 has a hollow cavity, an installation hole 251 for installing the filter 24 is arranged on an upper end face of the guide cylinder 25, a lower end of the guide cylinder 25 is open, the filter 24 is vertically arranged in the guide cylinder 25, the filter 24 is a tubular filter screen, and the filter 24 is communicated with the first cavity 21. When the device works, the gas flow enters the second cavity from the inlet of the second cavity, flows downward in the second cavity, flows upward from the open lower end of the guide cylinder 25 to the first cavity 21 (the by-products are condensed into particulate objects after being cooled and filtered by the filter 24), and finally flows out from the gas outlet of the first cavity 21 to the vacuum pump.

[0053] In some embodiments, the filter 24 is made of stainless steel. A plurality of filters 24 are arranged in parallel.

[0054] The second cavity comprises a first part 22 and a second part 23, the first part 22 has a uniform diameter, the guide cylinder 25 is located in the first part 22, the second part 23 is located below the first part 22, the diameter of the second part 23 gradually decreases from top to bottom, the time of the gas flow in the condensing cylinder is increased, and the condensation and impurity filtering are facilitated.

[0055] In some embodiments, the device further comprises a first impurity collecting container 9, the first impurity collecting container 9 is located below the outer cylinder, the first impurity collecting container 9 is communicated with the outlet of the outer cylinder, and the first impurity collecting container 9 is used for receiving the impurities flowing out from the outlet of the outer cylinder and facilitating collection.

[0056] In some embodiments, the device further comprises a second impurity collecting container 10, the second impurity collecting container 10 is located below the condensing cylinder, the second impurity collecting container 10 is communicated with the outlet of the condensing cylinder, and the second impurity collecting container 10 is used for receiving the impurities flowing out from the outlet of the condensing cylinder and facilitating collection.

[0057] In some embodiments, the device further comprises a scraping assembly, the scraping assembly comprising a scraper 3 and a driving member 4, the scraper 3 being located inside the inner cylinder 14 and attached to the inner side of the cylinder wall of the inner cylinder 14, and the driving member 4 being located outside the outer cylinder and connected to the scraper 3 for driving the scraper 3 to move along the height direction of the inner cylinder 14. The scraper 3 is used to scrape the impurities on the inner wall of the inner cylinder 14, without disassembling the whole device, thus greatly improving the production efficiency.

[0058] In some embodiments, the scraper 3 is a disc, and the circumferential profile surface of the scraper 3 is attached to the inner side of the cylinder wall of the inner cylinder 14. In a preferred embodiment, the diameter of the scraper 3 gradually decreases from top to bottom, i.e., the outer peripheral wall of the scraper 3 is inclinedly arranged from top to bottom, which facilitates the smooth movement of the scraper 3 along the inner cylinder 14, so as to better scrape the impurities on the inner wall of the inner cylinder 14.

[0059] In some embodiments, the outer shell 131 is cylindrical.

[0060] In some embodiments, the liquid inlet 1311 on the outer shell 131 of the cooling member 13 is used to communicate with the cooling medium supply unit, the liquid outlet 1312 is used to communicate with the cooling medium receiving unit, a liquid inlet pipe is arranged at the liquid inlet 1311, a liquid outlet pipe is arranged at the liquid outlet 1312, and the liquid inlet 1311 is arranged at a position lower than the liquid outlet 1312.

[0061] The device of the example further comprises an air inlet pipe 15, one end of the air inlet pipe 15 being in communication with the reaction kettle 7, and the other end of the air inlet pipe 15 being in communication with the inlet of the outer cylinder, the air inlet pipe 15 extending downwardly and obliquely towards the outer cylinder, which facilitates the formation of a cyclone structure in the outer cylinder.

[0062] In the example, the condensing cylinder is in communication with the gas outlet of the inner cylinder 14 through the communication pipeline 5, the communication pipeline 5 extends downwardly and obliquely towards the condensing cylinder, and the air inlet pipe 15 is arranged at a position higher than the communication pipeline 5.

[0063] The communication pipeline 5 is provided with a valve 6 for controlling the opening and closing of the communication pipeline 5. Referring to Figure 1 The communication pipeline 5 comprises a plurality of pipelines connected in sequence, and adjacent two pipelines are connected through connecting flanges.

[0064] In the example, the gas outlet of the inner cylinder 14 is arranged at a position higher than the inlet of the condensing cylinder, which facilitates the rapid entry of the gas not condensed in the inner cylinder 14 into the condensing cylinder.

[0065] In some embodiments, a baffle 17 is arranged between the outer cylinder and the inner cylinder 14, the baffle 17 is annular, the baffle 17 is arranged higher than the inner opening of the outer cylinder, and the baffle 17 is arranged lower than the gas outlet of the inner cylinder 14, the baffle 17 divides the outer cylinder into upper space and lower space, and the baffle 17 limits the upward flow of the gas flow, so that the gas flow flows downward to the space between the lower end of the cooling member 13 and the bottom of the outer cylinder.

[0066] The specific embodiment of the vacuum condensation filter device in the example is as follows:

[0067] The mixed steam generated in the reaction kettle 7 (including small molecule by-products phenol, a small amount of oligomers and unreacted excess distillate phenol) first enters the condenser 1, the pressure of the mixed steam in the inner cylinder 14 of the condenser 1 is lower than the pressure in the inner cylinder of the outer cylinder, the mixed steam is cooled to form solid impurities after passing through the condensation jacket 16, and some gas flows downward into the cooling member 13 and then upward along the cylinder body, and solid impurities are also formed in this process, at this time, most of the by-products in the cooled mixed steam have been removed, and the uncooled gas continues to pass upward through the inner cylinder 14 and enters the condensation filter 2 to continue cooling and filtering, and the remaining by-products are continuously removed, and the impurities generated by cooling and filtering enter the second impurity collection container 10, and a vacuum pump continuously pumps vacuum to achieve the purpose of continuous production.

[0068] The advantages of the vacuum condensation filter device in the example are as follows:

[0069] 1. The mixed steam from the reaction kettle passes through the condenser and the condensation filter in sequence, the by-products in the mixed steam are removed, the by-products are prevented from entering the vacuum pump and the vacuum pipeline, the problem of phenol, a small molecule by-product generated in the polymerization reaction, blocking the vacuum pipeline is solved, and the purpose of continuous production is achieved; safe and reliable, eliminating production hazards and improving production stability;

[0070] 2. Improve the effect of polymerization reaction and improve product quality.

[0071] 3. Effectively reduce the workload of personnel cleaning the vacuum pipeline and cleaning the internal scale of the vacuum pump.

[0072] 4. Reduce the failure rate of equipment, and prevent the vacuum equipment from stopping due to corrosion failure.

[0073] The above examples are only for illustrating the technical concept and characteristics of the present application, the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A vacuum condensation filtration device, characterized in that, include: A condenser is provided for communication with a reaction vessel. The condenser includes an outer cylinder, an inner cylinder, and a cooling element. A condensing jacket is provided on the outer periphery of the outer cylinder for containing a cooling medium. The outer cylinder has an inlet on its side. The inner cylinder has a flow space, with its lower end located inside the outer cylinder and its lower end open. The upper end of the inner cylinder extends out of the outer cylinder, and the inner cylinder located outside the outer cylinder has a gas outlet. The cooling component is located inside the outer cylinder and connected to the lower end of the inner cylinder. There is a gap between the lower end of the cooling component and the bottom of the outer cylinder. The cooling component includes an outer shell and an inner shell. The inner shell is disposed inside the outer shell. A flow space for the cooling medium to flow is formed between the outer shell and the inner shell. A through hole is provided in the middle of the inner shell. The through hole passes through the upper end and the lower end of the cooling component. The through hole communicates with the flow space of the inner cylinder. The through hole includes a first section and a second section connected below the first section. The first section is a cone shape that is wider at the top and narrower at the bottom. The second section is a cone shape that is narrower at the top and wider at the bottom. A condenser filter includes a condenser cylinder and a filter element. The inlet of the condenser cylinder is connected to the outlet of the inner cylinder, and the outlet of the condenser cylinder is connected to a vacuum pump. A cooling jacket is provided on the outer periphery of the condenser cylinder, and the filter element is disposed inside the condenser cylinder. When the device is in operation, the airflow passes sequentially through the outer cylinder, the cooling component through hole, and the inner cylinder, and flows out from the air outlet of the inner cylinder into the condenser cylinder.

2. The vacuum condensation filtration device according to claim 1, characterized in that, The device also includes an air inlet pipe, one end of which is connected to the reaction vessel, and the other end of which is connected to the inlet of the outer cylinder. The air inlet pipe extends downward at an angle toward the outer cylinder.

3. The vacuum condensation filtration device according to claim 1, characterized in that, The outer shell is cylindrical.

4. The vacuum condensation filtration device according to claim 1, characterized in that, The outer cylinder includes a first cylinder and a second cylinder. The first cylinder has the same diameter, and the second cylinder is located at the lower end of the first cylinder. The diameter of the second cylinder gradually decreases from top to bottom.

5. The vacuum condensation filtration device according to claim 1, characterized in that, The condenser cylinder and the air outlet of the inner cylinder are connected by a connecting pipe, which extends downward at an angle toward the condenser cylinder; a valve is installed on the connecting pipe.

6. The vacuum condensation filtration device according to claim 1, characterized in that, The condenser cylinder is divided into a first chamber and a second chamber by a partition. The first chamber is located on top of the second chamber. A guide cylinder is installed inside the second chamber. A through hole is provided on the partition. The upper end of the guide cylinder is connected to the through hole of the partition. The guide cylinder has a hollow cavity. An installation hole for installing the filter element is provided on the upper end face of the guide cylinder. The lower end of the guide cylinder is open. The filter element is vertically installed inside the guide cylinder. The filter element is a tubular filter screen and is in communication with the first chamber.

7. The vacuum condensation filtration device according to claim 1, characterized in that, The device further includes a scraping assembly, which includes a scraper and a drive unit. The scraper is located inside the inner cylinder and is attached to the inner wall of the inner cylinder. The drive unit is located outside the outer cylinder and is connected to the scraper to drive the scraper to move along the height direction of the inner cylinder.

8. The vacuum condensation filtration device according to claim 7, characterized in that, The scraper is disc-shaped, and its circumferential profile is attached to the inner wall of the inner cylinder.

9. The vacuum condensation filtration device according to claim 1, characterized in that, The device further includes a first impurity collection container, which is connected to the outlet of the outer cylinder.

10. The vacuum condensation filtration device according to claim 1, characterized in that, The device further includes a second impurity collection container, which is located below the condenser cylinder and communicates with the outlet of the condenser cylinder.

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