An automatic draining device and method for preventing clogging in a vacuum buffer tank of a degradation reactor

Abstract

This invention relates to the field of cellulose ether processing technology, specifically to an automatic drainage device and method for flushing and preventing blockage in a vacuum buffer tank of a degradation vessel. The automatic drainage device for flushing and preventing blockage in a vacuum buffer tank of a degradation vessel includes: a vessel body; a heating component; a driving component; a dual-purpose pipe assembly; a hydrogen chloride gas supply component connected to the beginning of the main pipe; a vacuum buffer tank assembly connected to the beginning of the main pipe; and a flushing component connected to the vacuum buffer tank assembly. Since there will be acidic liquid carrying material in the vacuum system, the acidic liquid carrying material is collected through the buffer tank. After a long period of reaction with the acidic liquid carrying material, the accumulated cellulose ether in the buffer tank will appear as a jelly in the water. Water in the water tank is pumped into the buffer tank through the flushing pipe by a flushing pump, which can dilute the material and change its flow state. The water provides the power to realize the material flow, and finally it is discharged from the drain outlet, ensuring that the pipeline is not blocked by material.

Description

Technical Field

[0001] This invention relates to the field of cellulose ether processing technology, specifically to an automatic draining device and method for flushing and preventing blockage in a vacuum buffer tank of a degradation vessel. Background Technology

[0002] Cellulose ethers are a class of water-soluble polymers produced from natural cellulose through alkalization and etherification reactions. Their core characteristic lies in the significant change in solubility: natural cellulose is insoluble in water, while cellulose ethers are soluble in water, dilute alkaline solutions, and organic solvents, and also exhibit thermoplasticity.

[0003] Cellulose ethers possess thickening and thixotropic properties, improving material flowability and preventing segregation. In the construction industry, cellulose ethers are used in self-leveling mortars and putty powders to enhance water retention and workability. In the pharmaceutical and food industries, cellulose ethers serve as sustained-release materials and food additives to control drug release or improve taste. In the daily chemical and chemical industries, cellulose ethers are used as thickeners in detergents and as emulsifiers in oil extraction.

[0004] The production of cellulose ethers involves the following drying process: After entering a degradation reactor (a double-cone enamel-lined drying reactor), the cellulose ether material is dried by heating and vacuuming. During the drying process, hydrogen chloride gas is also introduced to reduce the viscosity of the cellulose ether material. Therefore, there will be acidic liquid containing the material in the vacuum system. This acidic liquid is collected through a vacuum buffer tank. Because cellulose ether has a jelly-like consistency in water and poor flowability in pipelines, the current process involves manually collecting the vacuum liquid from the buffer tank, which poses a safety hazard. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problems existing in the background art and to design and provide an automatic drainage device and method for flushing and preventing blockage of the vacuum buffer tank of the degradation vessel.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic draining device for flushing and preventing clogging of a degradation reactor vacuum buffer tank includes:

[0008] The vessel body has an inlet and an outlet at its upper and lower ends, respectively. Both the inlet and outlet are equipped with removable sealing caps. The vessel body has a drying chamber for placing the material to be dried and a heating jacket for filling the heat medium inside. A first mounting pipe is welded and fixed to the left side wall of the vessel body, and the first mounting pipe is connected to the heating jacket.

[0009] A heating component, which is connected to the first mounting pipe, is used to circulate and inject heat medium into the heating jacket.

[0010] The drive assembly includes a second mounting tube welded and fixed to the right side wall of the vessel body. One end of the second mounting tube is located inside the drying chamber, and the other end of the second mounting tube extends out of the drying chamber and is rotatably mounted with a bearing. The bearing is bolted to the side wall of the outer shell. A driven wheel is welded and fixed to the second mounting tube on the right side of the bearing. The driven wheel is connected to a motor. The inner cavity of the second mounting tube communicates the drying chamber with the outside.

[0011] A dual-purpose pipe assembly is rotatably installed in the inner cavity of the second mounting pipe. The dual-purpose pipe assembly includes a main pipe, the end of which is located inside the drying chamber. The end of the main pipe is connected to the beginning of a vacuum pipe and the beginning of a hydrogen chloride gas pipe. The end of the vacuum pipe is located inside the drying chamber and is at a height higher than the beginning of the vacuum pipe. The end of the hydrogen chloride gas pipe is located inside the drying chamber and is at a height lower than the beginning of the hydrogen chloride gas pipe. A first check valve is provided on the vacuum pipe, allowing the medium to flow only from the end of the vacuum pipe to the beginning of the vacuum pipe. A second check valve is provided on the hydrogen chloride gas pipe, allowing the medium to flow only from the beginning of the hydrogen chloride gas pipe to the end of the hydrogen chloride gas pipe.

[0012] A hydrogen chloride gas supply assembly is connected to the beginning of the main pipe;

[0013] A vacuum buffer tank assembly is connected to the beginning of the main pipe;

[0014] The rinsing assembly is connected to the vacuum buffer tank assembly.

[0015] As a preferred embodiment of the above technical solution, the beginnings of the vacuum tube and the hydrogen chloride gas tube are connected to the end of the main tube by welding or a T-connector.

[0016] As a preferred embodiment of the above technical solution, a drive wheel is welded and fixed to the drive end of the motor, and a transmission belt for transmission is clamped between the drive wheel and the driven wheel.

[0017] As a preferred embodiment of the above technical solution, the end of the vacuum tube is fitted with a vacuum suction cover to prevent cellulose ether material from falling into the vacuum tube; the end of the hydrogen chloride gas tube is fitted with a nozzle to increase the hydrogen chloride gas ejection area.

[0018] As a preferred embodiment of the above technical solution, the hydrogen chloride gas supply assembly includes a gas supply pipe, the end of which is connected to the beginning of the main pipe, the beginning of which is connected to a hydrogen chloride gas cylinder, and a gas supply valve for adjusting gas pressure and switching on / off is also provided on the gas supply pipe.

[0019] As a preferred embodiment of the above technical solution, the vacuum buffer tank assembly includes a buffer tube and a buffer tank. The upper end face of the buffer tank is provided with a covered inlet for adding buffer solution. The end of the buffer tube is connected to the beginning of the main tube. The beginning of the buffer tube extends into the inner cavity of the buffer tank and is always lower than the liquid level of the buffer solution. A buffer valve is provided on the buffer tube.

[0020] The buffer tank is also equipped with an air extraction pipe, the end of which is always higher than the liquid level of the buffer solution, and the beginning of which is connected to a vacuum pump.

[0021] The bottom of the buffer tank is provided with a drain outlet for discharging waste liquid.

[0022] As a preferred embodiment of the above technical solution, the ends of the gas supply pipe and the buffer pipe are connected to the beginning of the main pipe by welding or by a T-connector.

[0023] As a preferred embodiment of the above technical solution, the rinsing assembly includes a rinsing pipe, the end of which is connected to a rinsing port, the rinsing port being located at the bottom of the buffer tank, the beginning of which is connected to a water tank, and the rinsing pipe is also provided with a water tank.

[0024] A method for automatically draining liquid from a vacuum buffer tank of a degradation reactor to prevent clogging, comprising the following steps:

[0025] S1. Cellulose ether material is fed into the drying chamber through the feed inlet and sealed. The vessel body is continuously rotated by the drive component. The heating medium is circulated into the heating jacket by the heating component to heat the cellulose ether material in the drying chamber. Under the action of the vacuum buffer tank component, the drying chamber is evacuated through the dual-purpose pipe component. During the vacuum heating and drying process, hydrogen chloride gas is introduced into the drying chamber. Under the triple action of vacuum, heating and hydrogen chloride gas, the cellulose ether material is dried rapidly.

[0026] S2. The extracted acid solution containing the material is collected through a buffer tank. After a long period of reaction with the acid solution, the accumulated cellulose ether in the buffer tank will appear as a jelly-like substance with poor fluidity in the pipeline. Water from the water tank is pumped into the buffer tank through the flushing pipe by a flushing pump, which can dilute the material and change its flow state. Water is used to provide power to achieve the flow of the material, which is finally discharged from the drain outlet. At the same time, water serves as a pipeline flushing medium to ensure that the pipeline is not blocked by the material.

[0027] This invention provides an automatic draining device and method for flushing and preventing blockage in a vacuum buffer tank of a degradation reactor, which has the following beneficial effects:

[0028] 1. During the operation of the reactor, due to the continuous rotation of the reactor, most of the cellulose ether material accumulates in the lower part of the drying chamber under the action of gravity, a small part adheres to the inner wall of the drying chamber under the action of friction and centrifugal force, and a very small part is lifted into the inner cavity of the drying chamber. Therefore, the end position of the vacuum tube is set high to avoid a large amount of cellulose ether material being sucked into the vacuum tube and main tube during vacuuming, causing blockage.

[0029] During vacuuming, because the hydrogen chloride gas pipe is equipped with a second check valve that only allows the medium to flow from the beginning to the end of the hydrogen chloride gas pipe, even if the end of the hydrogen chloride gas pipe is set low, no cellulose ether material will enter the hydrogen chloride gas pipe and cause blockage.

[0030] 2. In the degradation process of cellulose ether materials, since cellulose ether materials combine with water to form a jelly-like gel state, vacuum heating and drying alone cannot completely dry the cellulose ether materials. Therefore, during the vacuum process, hydrogen chloride gas also needs to be introduced into the drying chamber to reduce the viscosity of the cellulose ether materials. The hydrogen chloride gas will also combine with water to provide an auxiliary drying effect.

[0031] When it is necessary to introduce hydrogen chloride gas into the drying chamber, since the drying chamber is under vacuum and negative pressure, simply close the valve of the vacuum buffer tank assembly and open the valve of the hydrogen chloride gas supply assembly. The hydrogen chloride gas in the hydrogen chloride gas supply assembly will naturally be drawn into the drying chamber and sprayed out from the end of the hydrogen chloride gas pipe.

[0032] 3. Because the end of the hydrogen chloride gas pipe is positioned low, the sprayed hydrogen chloride gas can quickly contact most of the cellulose ether material, maximizing the contact area. This also assists in stirring the cellulose ether and further helps the hydrogen chloride gas combine with the moisture in the cellulose ether material. Simultaneously, because the vacuum pipe is equipped with a first check valve that only allows the medium to flow from the end to the beginning of the vacuum pipe, hydrogen chloride gas cannot escape from the end. Furthermore, any residual jelly-like cellulose ether material in the vacuum pipe will accumulate inside the main pipe due to gravity and the previous vacuuming process. The hydrogen chloride gas can blow this residual jelly-like cellulose ether material out from the end of the hydrogen chloride gas pipe, effectively cleaning the pipe.

[0033] 4. Since there will be acidic liquid carrying material in the vacuum system, which is collected through the buffer tank, the buffer solution in the buffer tank reacts with the acidic liquid carrying material for a long time. The accumulated cellulose ether will appear as a jelly in the water and has poor flowability in the pipeline. The current process is to manually collect the vacuum liquid in the buffer tank, which poses a safety hazard. By using a flushing pump to pump water from the water tank into the buffer tank through the flushing pipe, the material can be diluted and its flow state can be changed. The water is used to provide power to realize the flow of the material, which is finally discharged from the drain outlet. At the same time, the water serves as a pipeline flushing medium to ensure that the pipeline is not blocked by material. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is a partial cross-sectional view of the vessel body in this invention;

[0037] Figure 3 This is a schematic diagram of the dual-purpose tube assembly in this invention;

[0038] Figure 4 This is a diagram showing the connection relationship between the hydrogen chloride gas supply assembly, the vacuum buffer tank assembly, and the flushing assembly in this invention.

[0039] Figure 5 This is a partial cross-sectional view of the vacuum buffer tank assembly in this invention.

[0040] The attached figures are labeled as follows:

[0041] 1. Kettle body; 11. Feed inlet; 12. Discharge outlet; 13. Drying chamber; 14. Heating jacket; 15. First mounting pipe;

[0042] 2. Heating components;

[0043] 3. Drive assembly; 31. Second mounting tube; 32. Bearing; 33. Driven pulley; 34. Transmission belt; 35. Drive wheel; 36. Motor; 37. Housing;

[0044] 4. Dual-purpose pipe assembly; 41. Main pipe; 42. Vacuum pipe; 43. Vacuum suction hood; 44. First check valve; 45. Hydrogen chloride gas pipe; 46. Nozzle; 47. Second check valve;

[0045] 5. Hydrogen chloride gas supply assembly; 51. Gas supply pipe; 52. Gas supply valve; 53. Hydrogen chloride gas cylinder;

[0046] 6. Vacuum buffer tank assembly; 61. Buffer pipe; 62. Buffer valve; 63. Buffer tank; 64. Liquid inlet; 65. Vacuum pipe; 66. Vacuum valve; 67. Vacuum pump; 68. Flushing port; 69. Drain port;

[0047] 7. Flushing assembly; 71. Flushing pipe; 72. Flushing pump; 73. Water tank. Detailed Implementation

[0048] Please refer to the attached diagram below. Figures 1-5 This document explains the content of the invention and its differences from existing technologies. The technical solutions (including preferred solutions) of the invention are further described in detail below with reference to accompanying drawings and examples of optional embodiments. It should be noted that any technical feature or solution in this embodiment is one or more of several optional technical features or solutions. For the sake of brevity, this document cannot exhaustively list all alternative technical features and solutions of the invention, nor is it convenient to emphasize that each implementation of a technical feature is one of several optional implementations. Therefore, those skilled in the art should understand that any technical means provided by the invention can be replaced, or any two or more technical means or features provided by the invention can be combined to obtain new technical solutions. No technical feature or solution in this embodiment limits the scope of protection of the invention. The scope of protection of the invention should include any alternative technical solutions that can be conceived by those skilled in the art without creative effort, as well as new technical solutions obtained by combining any two or more technical means or features provided by the invention.

[0049] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this embodiment, an automatic draining device for flushing and preventing blockage in a degradation reactor vacuum buffer tank includes:

[0052] The vessel body 1 has an inlet 11 and an outlet 12 at its upper and lower ends, respectively. Both the inlet 11 and the outlet 12 are equipped with removable sealing caps. The vessel body 1 has a drying chamber 13 for placing the material to be dried and a heating jacket 14 for filling the heat medium inside. A first mounting pipe 15 is welded and fixed to the left side wall of the vessel body 1. The first mounting pipe 15 is connected to the heating jacket 14.

[0053] Heating component 2, which is connected to the first mounting pipe 15, is used to circulate and inject heat medium into the heating jacket 14.

[0054] The drive assembly 3 includes a second mounting tube 31 welded and fixed to the right side wall of the vessel body 1. One end of the second mounting tube 31 is located inside the drying chamber 13, and the other end of the second mounting tube 31 extends out of the drying chamber 13 and is rotatably mounted with a bearing 32. The bearing 32 is bolted to the side wall of the outer shell 37. A driven wheel 33 is welded and fixed to the second mounting tube 31 on the right side of the bearing 32. The driven wheel 33 is driven by a motor 36. The inner cavity of the second mounting tube 31 communicates the drying chamber 13 with the outside.

[0055] The dual-purpose pipe assembly 4 is rotatably installed in the inner cavity of the second mounting pipe 31. The dual-purpose pipe assembly 4 includes a main pipe 41, the end of which is located inside the drying chamber 13. The end of the main pipe 41 is connected to the beginning of a vacuum pipe 42 and the beginning of a hydrogen chloride gas pipe 45. The end of the vacuum pipe 42 is located inside the drying chamber 13 and is at a height higher than the beginning of the vacuum pipe 42. The end of the hydrogen chloride gas pipe 45 is located inside the drying chamber 13 and is at a height lower than the beginning of the hydrogen chloride gas pipe 45. The vacuum pipe 42 is provided with a first check valve 44 that only allows the medium to flow from the end of the vacuum pipe 42 to the beginning of the vacuum pipe 42. The hydrogen chloride gas pipe 45 is provided with a second check valve 47 that only allows the medium to flow from the beginning of the hydrogen chloride gas pipe 45 to the end of the hydrogen chloride gas pipe 45.

[0056] The hydrogen chloride gas supply component 5 is connected to the beginning of the main pipe 41;

[0057] The vacuum buffer tank assembly 6 is connected to the beginning of the main pipe 41;

[0058] The rinsing assembly 7 is connected to the vacuum buffer tank assembly 6.

[0059] In practice, the heating medium is circulated into the heating jacket 14 through the heating component 2, which achieves the technical effect of heating the drying chamber 13. In this way, when the cellulose ether material is put into the drying chamber 13 through the feed inlet 11, it can be heated in the drying chamber 13. Under the action of the vacuum buffer tank component 6, the drying chamber 13 is evacuated through the dual-purpose pipe component 4. The cellulose ether material is dried quickly under the dual effects of vacuum and heating.

[0060] During the operation of the vessel 1, as the vessel 1 rotates continuously, most of the cellulose ether material accumulates in the lower part of the drying chamber 13 under the action of gravity, a small part adheres to the inner wall of the drying chamber 13 under the action of friction and centrifugal force, and a very small part is lifted into the inner cavity of the drying chamber 13. Therefore, the terminal position of the vacuum tube 42 is set high to avoid a large amount of cellulose ether material being sucked into the vacuum tube 42 and the main tube 41 during vacuuming, causing blockage.

[0061] During vacuuming, because the hydrogen chloride gas pipe 45 is equipped with a second check valve 47 that only allows the medium to flow from the beginning to the end of the hydrogen chloride gas pipe 45, even if the end position of the hydrogen chloride gas pipe 45 is set low, no cellulose ether material will enter the hydrogen chloride gas pipe 45 and cause blockage.

[0062] In the degradation process of cellulose ether materials, since cellulose ether materials combine with water to form a jelly-like gel state, vacuum heating and drying alone cannot completely dry the cellulose ether materials. Therefore, during the vacuum process, hydrogen chloride gas also needs to be introduced into the drying chamber 13 to reduce the viscosity of the cellulose ether materials. The hydrogen chloride gas also combines with water to provide an auxiliary drying effect.

[0063] When it is necessary to introduce hydrogen chloride gas into the drying chamber 13, since the drying chamber 13 is in a vacuum negative pressure state, it is only necessary to close the valve of the vacuum buffer tank assembly 6 and open the valve of the hydrogen chloride gas supply assembly 5. The hydrogen chloride gas in the hydrogen chloride gas supply assembly 5 will be naturally drawn into the drying chamber 13 and sprayed out from the end of the hydrogen chloride gas pipe 45.

[0064] Because the end of the hydrogen chloride gas pipe 45 is positioned low, the sprayed hydrogen chloride gas can quickly contact most of the cellulose ether material, maximizing the contact area. This also helps to agitate the cellulose ether and further facilitates the combination of hydrogen chloride gas with moisture in the cellulose ether material. Simultaneously, because the vacuum pipe 42 is equipped with a first check valve 44 that only allows the medium to flow from the end of the vacuum pipe 42 to the beginning, hydrogen chloride gas cannot escape from the end of the vacuum pipe 42. Furthermore, the jelly-like cellulose ether material remaining in the vacuum pipe 42 will accumulate in the main pipe 41 under the influence of gravity and the previous vacuuming process. The hydrogen chloride gas can blow the jelly-like cellulose ether material remaining in the main pipe 41 out from the end of the hydrogen chloride gas pipe 45, effectively cleaning the pipe.

[0065] It should be noted that the second mounting pipe 31 is connected to the drying chamber 13 and the dual-purpose pipe assembly 4 is rotatably installed in the inner cavity of the second mounting pipe 31. A sealing element is provided between the inner cavity of the main pipe 41 and the second mounting pipe 31 to ensure that the drying chamber 13 can be evacuated to a vacuum. This is common knowledge in the field, so it is not shown in the figure and will not be described in detail.

[0066] Furthermore, the beginnings of the vacuum tube 42 and the hydrogen chloride gas tube 45 are connected to the end of the main tube 41 by welding or a T-connector.

[0067] As a further embodiment of the present invention, please refer to Figure 2 The drive end of the motor 36 is welded and fixed with a drive wheel 35, and a transmission belt 34 for transmission is clamped between the drive wheel 35 and the driven wheel 33.

[0068] In specific implementation, the driven wheel 33 is driven to rotate by the motor 36, the driven wheel 33 drives the second mounting tube 31 to rotate, the second mounting tube 31 drives the entire vessel body 1 to rotate, and the dual-purpose tube assembly 4 is rotatably installed in the inner cavity of the second mounting tube 31. In fact, the dual-purpose tube assembly 4 is stationary, while the second mounting tube 31 rotates relative to the dual-purpose tube assembly 4.

[0069] It should be noted that the power supply module, control module and other components of the motor 36 are common knowledge in the field, so they are not shown in the figure and will not be described in detail.

[0070] As a further embodiment of the present invention, please refer to Figure 3 The end of the vacuum tube 42 is fitted with a vacuum suction cover 43 to prevent cellulose ether material from falling into the vacuum tube 42; the end of the hydrogen chloride gas tube 45 is fitted with a nozzle 46 to increase the hydrogen chloride gas ejection area.

[0071] In practice, the outlet structure of nozzle 46 can expand the spray area of ​​hydrogen chloride gas, further increasing the contact area between hydrogen chloride gas and cellulose ether material.

[0072] As a further embodiment of the present invention, please refer to Figure 4 The hydrogen chloride gas supply assembly 5 includes a gas supply pipe 51, the end of which is connected to the beginning of the main pipe 41, and the beginning of which is connected to a hydrogen chloride gas cylinder 53. The gas supply pipe 51 is also equipped with a gas supply valve 52 for adjusting gas pressure and switching on / off.

[0073] As a further embodiment of the present invention, please refer to Figure 4 and Figure 5 The vacuum buffer tank assembly 6 includes a buffer tube 61 and a buffer tank 63. The upper end face of the buffer tank 63 is provided with a covered inlet 64 for adding buffer solution. The end of the buffer tube 61 is connected to the beginning of the main tube 41. The beginning of the buffer tube 61 extends into the inner cavity of the buffer tank 63 and is always lower than the liquid level of the buffer solution. A buffer valve 62 is provided on the buffer tube 61.

[0074] The buffer tank 63 is also provided with an air extraction pipe 65. The end of the air extraction pipe 65 is always higher than the liquid level of the buffer solution. The beginning of the air extraction pipe 65 is connected to a vacuum pump 67.

[0075] The bottom of the buffer tank 63 is provided with a drain outlet 69 for discharging waste liquid.

[0076] In practice, buffer solution is first added to buffer tank 63. When it is necessary to evacuate the drying chamber 13, simply close the gas supply valve 52 and open the buffer valve 62 and the extraction valve 66. At this time, the vacuum pump 67 will evacuate the drying chamber 13. The acidic gas-liquid mixture extracted from the buffer tube 61 will first enter the buffer solution to be neutralized and absorbed, thus preventing acidic gas from entering the vacuum pump 67 for a long time and causing corrosion damage to the vacuum pump 67.

[0077] Furthermore, the ends of the air supply pipe 51 and the buffer pipe 61 are connected to the beginning of the main pipe 41 by welding or a T-connector.

[0078] As a further embodiment of the present invention, please refer to Figure 4 and Figure 5 The rinsing assembly 7 includes a rinsing pipe 71, the end of which is connected to a rinsing port 68, which is located at the bottom of the buffer tank 63. The beginning of the rinsing pipe 71 is connected to a water tank 73, and the rinsing pipe 71 is also equipped with a water tank 73.

[0079] In practice, since there will be acidic liquid with material in the vacuum system, the acidic liquid with material is collected through buffer tank 63. After a long time, the buffer solution in buffer tank 63 reacts with the acidic liquid with material, and the accumulated cellulose ether will appear as a jelly in water, which has poor fluidity in the pipeline. The existing process is to manually collect the vacuum liquid in the buffer tank, which poses a safety hazard. The flushing pump 72 pumps water from water tank 73 into buffer tank 63 through flushing pipe 71, which can dilute the material and change its flow state. The water is used to provide power to realize the flow of the material, which is finally discharged from the drain outlet 69. At the same time, the water serves as the pipeline flushing medium to ensure that the pipeline is not blocked by material.

[0080] It should be noted that the water tank 73 uses tap water, ensuring a sufficient water source and water pressure. At the same time, the drain outlet 69 is equipped with a switch, which can seal the drain outlet 69 when drainage is not required. These are common knowledge in the field, so they are not shown in the figure and will not be described in detail.

[0081] Please see Figures 1-5 A method for automatically draining a vacuum buffer tank of a degradation reactor to prevent clogging by flushing, comprising the following steps:

[0082] S1. Cellulose ether material is fed into drying chamber 13 through feed inlet 11 and sealed. The vessel body 1 is driven to rotate continuously by drive component 3. Heat medium is circulated into heating jacket 14 through heating component 2 to heat cellulose ether material in drying chamber 13. Under the action of vacuum buffer tank component 6, vacuum is drawn into drying chamber 13 through dual-purpose pipe component 4. During vacuum heating and drying process, hydrogen chloride gas is introduced into drying chamber 13 intermittently. Under the triple action of vacuum, heating and hydrogen chloride gas introduction, cellulose ether material is dried rapidly.

[0083] S2. The extracted acid solution containing the material is collected through buffer tank 63. After a long period of reaction with the acid solution, the accumulated cellulose ether in the buffer solution will appear as a jelly, which has poor fluidity in the pipeline. Water in water tank 73 is pumped into buffer tank 63 through flushing pipe 71 by flushing pump 72, which can dilute the material and change its flow state. Water is used to provide power to realize the flow of the material, which is finally discharged from drain outlet 69. At the same time, water serves as the pipeline flushing medium to ensure that the pipeline is not blocked by the material.

[0084] In the description of this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An automatic draining device for flushing and preventing blockage in a vacuum buffer tank of a degradation reactor, characterized in that, include: The vessel body (1) has an inlet (11) and an outlet (12) at its upper and lower ends, respectively. Both the inlet (11) and the outlet (12) are equipped with removable sealing caps. The vessel body (1) has a drying chamber (13) for placing the material to be dried and a heating jacket (14) for filling the heat medium inside. A first installation pipe (15) is welded and fixed to the left side wall of the vessel body (1). The first installation pipe (15) is connected to the heating jacket (14). Heating component (2), which is connected to the first mounting pipe (15) and is used to circulate and inject heat medium into the heating jacket (14); The drive assembly (3) includes a second mounting tube (31) welded and fixed to the right side wall of the vessel body (1). One end of the second mounting tube (31) is located inside the drying chamber (13), and the other end of the second mounting tube (31) extends out of the drying chamber (13) and is rotatably mounted with a bearing (32). The bearing (32) is bolted to the side wall of the outer shell (37). A driven wheel (33) is welded and fixed to the second mounting tube (31) on the right side of the bearing (32). The driven wheel (33) is connected to a motor (36). The inner cavity of the second mounting tube (31) connects the drying chamber (13) to the outside. A dual-purpose pipe assembly (4) is rotatably installed in the inner cavity of the second mounting pipe (31). The dual-purpose pipe assembly (4) includes a main pipe (41), the end of which is located inside the drying chamber (13). The end of the main pipe (41) is connected to the beginning of a vacuum pipe (42) and the beginning of a hydrogen chloride gas pipe (45). The end of the vacuum pipe (42) is located inside the drying chamber (13) and its height is higher than the height of the beginning of the vacuum pipe (45). The end of the hydrogen chloride gas pipe (45) is located inside the drying chamber (13) and its height is lower than the height of the beginning of the hydrogen chloride gas pipe (45). The vacuum pipe (42) is provided with a first check valve (44) that only allows the medium to flow from the end of the vacuum pipe (42) to the beginning of the vacuum pipe (42). The hydrogen chloride gas pipe (45) is provided with a second check valve (47) that only allows the medium to flow from the beginning of the hydrogen chloride gas pipe (45) to the end of the hydrogen chloride gas pipe (45). The hydrogen chloride gas supply assembly (5) is connected to the beginning of the main pipe (41); The vacuum buffer tank assembly (6) is connected to the beginning of the main tube (41); The flushing assembly (7) is connected to the vacuum buffer tank assembly (6).

2. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 1, characterized in that: The beginnings of the vacuum tube (42) and the hydrogen chloride gas tube (45) are connected to the end of the main tube (41) by welding or T-junction.

3. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 1, characterized in that: The drive end of the motor (36) is welded and fixed with a drive wheel (35), and a transmission belt (34) for transmission is clamped between the drive wheel (35) and the driven wheel (33).

4. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 1, characterized in that: The end of the vacuum tube (42) is fitted with a vacuum suction hood (43) to prevent cellulose ether material from falling into the vacuum tube (42); the end of the hydrogen chloride gas tube (45) is fitted with a nozzle (46) to increase the area of ​​hydrogen chloride gas ejection.

5. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 1, characterized in that: The hydrogen chloride gas supply assembly (5) includes a gas supply pipe (51), the end of which is connected to the beginning of the main pipe (41), the beginning of which is connected to a hydrogen chloride gas cylinder (53), and a gas supply valve (52) for adjusting gas pressure and switching on / off is also provided on the gas supply pipe (51).

6. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 5, characterized in that: The vacuum buffer tank assembly (6) includes a buffer tube (61) and a buffer tank (63). The upper end face of the buffer tank (63) is provided with a capped inlet (64) for adding buffer solution. The end of the buffer tube (61) is connected to the beginning of the main tube (41). The beginning of the buffer tube (61) extends into the inner cavity of the buffer tank (63) and is always lower than the liquid level of the buffer solution. A buffer valve (62) is provided on the buffer tube (61). The buffer tank (63) is also provided with an air extraction pipe (65). The end of the air extraction pipe (65) is always higher than the liquid level of the buffer solution. The beginning of the air extraction pipe (65) is connected to a vacuum pump (67). The bottom of the buffer tank (63) is provided with a drain outlet (69) for discharging waste liquid.

7. The automatic draining device for flushing and preventing blockage in the vacuum buffer tank of the degradation vessel according to claim 6, characterized in that: The ends of the gas supply pipe (51) and the buffer pipe (61) are connected to the beginning of the main pipe (41) by welding or T-connection.

8. The automatic draining device for flushing and preventing blockage of the vacuum buffer tank of the degradation vessel according to claim 6, characterized in that: The flushing assembly (7) includes a flushing pipe (71), the end of which is connected to a flushing port (68), the flushing port (68) being located at the bottom of the buffer tank (63), the beginning of which is connected to a water tank (73), and the flushing pipe (71) is also provided with a water tank (73).

9. A method for automatically draining liquid from a vacuum buffer tank of a degradation reactor to prevent clogging, characterized in that: The automatic draining device for flushing and preventing blockage of the vacuum buffer tank of the degradation vessel as described in claim 8 is used for draining, and the specific steps are as follows: S1. Cellulose ether material is fed into the drying chamber (13) through the feed inlet (11) and sealed. The vessel body (1) is driven to rotate continuously by the drive component (3). The heating medium is circulated into the heating jacket (14) through the heating component (2) to heat the cellulose ether material in the drying chamber (13). Under the action of the vacuum buffer tank component (6), the drying chamber (13) is evacuated through the dual-purpose pipe component (4). During the vacuum heating and drying process, hydrogen chloride gas is introduced into the drying chamber (13) interspersed. Under the triple action of vacuum, heating and hydrogen chloride gas, the cellulose ether material is dried quickly. S2. The extracted acid solution with material is collected through the buffer tank (63). After a long time of reaction with the acid solution with material, the accumulated cellulose ether in the buffer tank (63) will appear as a jelly in the buffer solution. It has poor fluidity in the pipeline. The water in the water tank (73) is pumped into the buffer tank (63) through the flushing pipe (71) by the flushing pump (72). This can dilute the material and change its flow state. The material flow is achieved by using water as power. Finally, it is discharged from the drain outlet (69). At the same time, water is used as the pipeline flushing medium to ensure that the pipeline is not blocked by material.

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