An environmental protection device for changing the discharging mode of fluidized bed catalyst

Abstract

The utility model discloses an environmental protection device of changing fluidized bed catalyst discharge mode relates to chemical production equipment technical field. The device includes powder storage jar and moving assembly, powder storage jar installs on moving assembly, the top of powder storage jar is connected with the powder pipe, and the end of powder pipe is provided with the quick -operation joint for the butt joint of powder discharge pipe of fluidized bed reactor. The environmental protection device of changing fluidized bed catalyst discharge mode through the quick -operation joint of powder pipe end on powder storage jar, can complete installation and dismounting with powder discharge pipe of fluidized bed reactor, and cooperate powder storage jar solid mounting on moving assembly, can directly realize the integral transfer of powder storage jar and internal powder and the cleaning of different places, avoids the dust and irritating smell in the working place of the scattering caused by manual on -the -spot slotting and taking powder in traditional mode, essentially improves the working environment, and effectively protects the professional health of operating personnel.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, and in particular to an environmentally friendly device that changes the unloading method of fluidized bed catalysts. Background Technology

[0002] Vinyl acetate, as an important organic chemical raw material, is widely used in the production of polyvinyl acetate, polyvinyl alcohol, and various coatings, adhesives, and fiber products. In the industrial production of vinyl acetate, the acetylene gas-phase synthesis is one of the mainstream processes, with fluidized bed reactors widely used due to their efficient mass and heat transfer characteristics. This process uses activated carbon supported on zinc acetate as a catalyst. During the reaction, the catalyst particles undergo mechanical wear due to continuous boiling motion, forming a large amount of powder. If this powder is not removed in time, it will affect the reaction efficiency and product quality; therefore, daily unloading is necessary.

[0003] In existing technologies, the unloading process typically involves collecting powder using an open or semi-closed powder receiving tank fixed below the unloading pipe. The powder is then moistened by adding water to the receiving tank. After moistening, the powder outlet of the unloading tank is manually opened to remove the powder. However, even after moistening with water, manually opening the outlet still generates a large amount of dust that disperses throughout the fluidized bed reactor's working area. This dust also has an irritating odor, posing a long-term health hazard to operators. Furthermore, the dust may contain incompletely separated acetylene and acetic acid gases, which can easily lead to safety accidents if exposed to open flames during manual operation. Utility Model Content

[0004] This invention provides an environmentally friendly device that changes the unloading method of fluidized bed catalysts. It can solve the problems mentioned in the background art, such as the large amount of dust generated by manually opening the outlet, the dust accompanied by an irritating odor, the occupational health hazards of long-term exposure to the operator, and the dust easily carrying incompletely separated acetylene and acetic acid gases, which can easily cause safety accidents if exposed to open flames during manual operation.

[0005] An environmentally friendly device for changing the unloading method of fluidized bed catalysts includes a powder storage tank and a moving assembly. The powder storage tank is mounted on the moving assembly. A powder inlet pipe is connected to the top of the powder storage tank, and a quick connector for connecting to the powder unloading pipe of the fluidized bed reactor is provided at the end of the powder inlet pipe. The powder storage tank also integrates a dust suppression assembly, a nitrogen inlet pipe, and an exhaust pipe, and an openable and closable discharge gate is provided on the side of the powder storage tank.

[0006] This utility model provides an environmentally friendly device for changing the unloading method of fluidized bed catalysts, which, compared with the prior art, has the following beneficial effects, but is not limited to: This environmentally friendly device, which changes the unloading method of fluidized bed catalysts, can be quickly installed and disassembled with the powder unloading pipe of the fluidized bed reactor via a quick connector at the end of the powder inlet pipe on the powder storage tank. When the powder storage tank is fixed to the mobile assembly, it can directly realize the overall transfer and off-site cleaning of the powder storage tank and its internal powder. This avoids the dust and irritating odors that occur in the workplace due to manual on-site powder extraction in traditional methods, fundamentally improving the working environment and effectively protecting the occupational health of operators. Furthermore, the device integrates a nitrogen inlet pipe and an exhaust pipe on the powder storage tank. The synergistic effect allows for efficient gas replacement within the tank and the maintenance of a slightly positive pressure inert environment, significantly reducing the concentration of flammable and toxic gases such as acetylene and acetic acid carried in the dust, and eliminating the safety hazard of explosion caused by open flames during manual operation. After unloading, the dust suppression components thoroughly wet the powder through water mist spraying, achieving deep dust suppression at the source and preventing secondary dust generation during subsequent transfer or cleaning. The side-openable and closable discharge door ensures convenient powder cleaning at designated locations and maintains the airtightness of the tank when closed, preventing gas or dust leakage during transfer.

[0007] Furthermore, the movable component includes a movable frame, the bottom of which is connected to a plurality of movable wheels, and a handrail is connected to one side of the movable frame.

[0008] Furthermore, the dust suppression component includes a water inlet pipe and a spray pipe. The water inlet pipe is connected to the top of the powder storage tank, and the spray pipe is connected to the inside of the powder storage tank. The water inlet end of the water inlet pipe is connected to an external water source, and the water outlet end of the water inlet pipe extends into the inside of the powder storage tank and is connected to the spray pipe.

[0009] Furthermore, the spray pipe fitting includes a temporary storage ring pipe, which is connected to the water outlet end of the water inlet pipe, and multiple atomizing nozzles are evenly distributed circumferentially at the bottom of the temporary storage ring pipe.

[0010] Furthermore, the powder storage container is equipped with a pressure sensor for monitoring the internal air pressure.

[0011] Furthermore, the moving component is equipped with a control box electrically connected to the pressure sensor, and the control box is equipped with an alarm.

[0012] Furthermore, a guide plate is provided inside the powder storage tank.

[0013] Furthermore, a pressure relief valve is provided on the top of the powder storage tank.

[0014] Furthermore, the volume of the powder storage container is 0.6-1.2 m³, and the powder storage container is made of stainless steel.

[0015] Furthermore, control valves are installed on the powder inlet pipe, water inlet pipe, nitrogen inlet pipe, and exhaust pipe. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the environmental protection device according to an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the environmental protection device according to an embodiment of this utility model; Figure 3 for Figure 2 A schematic diagram of the structure of the spray pipe fittings.

[0017] Explanation of reference numerals in the attached figures: 1. Powder storage tank; 2. Moving assembly; 3. Powder inlet pipe; 4. Quick connector; 5. Dust suppression assembly; 6. Nitrogen inlet pipe; 7. Exhaust pipe; 8. Discharge gate; 9. Powder unloading pipe; 10. Pressure sensor; 11. Control box; 12. Alarm; 13. Guide plate; 14. Pressure relief valve; 15. Control valve; 201. Moving frame; 202. Moving wheels; 203. Handrail; 51. Water inlet pipe; 52. Spray fittings; 521. Temporary storage ring pipe; 522. Atomizing nozzle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings showing multiple embodiments according to this application. It should be understood that the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments described in this application without creative effort will fall within the scope of protection of this application.

[0019] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing specific embodiments only and is not intended to limit this application; the terms "comprising," "including," "having," "containing," etc., in the description, claims, and accompanying drawings of this application are open-ended terms. Therefore, "comprising," "including," or "having" refers to, for example, a method or apparatus having one or more steps or elements, but is not limited to having only these one or more elements. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy. Furthermore, 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 number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, in the attached diagram, the X-axis represents the vertical direction, that is, the front-to-back position, and the positive direction of the X-axis (that is, the direction the arrow points to) represents the front, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents the back; in the attached diagram, the Y-axis represents the horizontal direction, that is, the left-to-right position, and the positive direction of the Y-axis (that is, the direction the arrow points to) represents the left, and the negative direction of the Y-axis (that is, the direction opposite to the positive direction of the Y-axis) represents the right; in the attached diagram, the Z-axis represents the vertical direction, that is, the up-to-down position, and the positive direction of the Z-axis (that is, the direction the arrow points to) represents the up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents the down.

[0022] It should also be noted that the aforementioned X-axis, Y-axis and Z-axis are only for the purpose of facilitating the description of this utility model and simplifying the description, and are not intended to 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 utility model.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] It should be emphasized that when the term "comprising / including" is used in this specification, it is used to explicitly indicate the presence of the stated feature, integer, step, or component, but does not exclude the presence or addition of one or more other features, integers, steps, parts, or groups of features, integers, steps, or parts.

[0025] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0026] like Figure 1-2 As shown, this utility model proposes an environmentally friendly device for changing the unloading method of fluidized bed catalysts, including a powder storage tank 1 and a moving component 2. The powder storage tank 1 is installed on the moving component 2. The top of the powder storage tank 1 is connected to a powder inlet pipe 3. The end of the powder inlet pipe 3 is provided with a quick connector 4 for connecting with the powder unloading pipe 9 of the fluidized bed reactor. The powder storage tank 1 is also integrated with a dust suppression component 5, a nitrogen inlet pipe 6 and an exhaust pipe 7. The side of the powder storage tank 1 is provided with an openable and closable discharge door 8. The dust suppression component 5 is used to wet the powder.

[0027] In this embodiment, the quick connector 4 at the end of the powder inlet pipe 3 on the powder storage tank 1 allows for quick installation and disassembly with the powder discharge pipe 9 of the fluidized bed reactor. Combined with the powder storage tank 1 being fixed to the mobile assembly 2, this enables direct overall transfer and off-site cleaning of the powder storage tank 1 and its internal powder. This eliminates the need for manual removal of powder from the reactor site, avoiding the dust and irritating odors that occur with traditional manual powder removal methods, fundamentally improving the working environment and effectively protecting the occupational health of operators. Furthermore, the nitrogen inlet integrated into the powder storage tank 1... Pipe 6 and exhaust pipe 7 work together to efficiently replace the gas inside the tank and maintain a slightly positive pressure inert environment, significantly reducing the concentration of flammable and toxic gases such as acetylene and acetic acid carried in the dust, eliminating the safety hazard of explosion caused by open flame during manual operation from the source; after unloading, the dust suppression component 5 thoroughly wets the powder with water mist spray, achieving deep dust suppression at the source and avoiding secondary dust generation during subsequent transfer or cleaning; the side-openable and closable discharge door 8 not only ensures the convenience of cleaning the powder at designated locations, but also maintains the airtightness of the tank when closed, preventing gas or dust leakage during transfer.

[0028] The designated location refers to a unified treatment site located far from the fluidized bed reactor.

[0029] Specifically, the volume of the powder storage tank 1 is 0.6-1.2m³. The powder storage tank 1 is made of stainless steel. Control valves 15 are installed on the powder inlet pipe 3, water inlet pipe 51, nitrogen inlet pipe 6 and exhaust pipe 7.

[0030] like Figure 1 and Figure 2 As shown, the movable component 2 includes a movable frame 201, with multiple movable wheels 202 connected to the bottom of the movable frame 201, and a handrail 203 connected to one side of the movable frame 201.

[0031] In this embodiment, the movable frame 201 can stably support the powder storage tank 1, ensuring that the tank remains stable during transportation. Multiple movable wheels 202 connected to the bottom of the movable frame 201 provide flexible mobility for the entire device. The handrail 203 on one side of the movable frame 201 allows the operator to accurately control the direction of movement, and the movable frame 201 can be easily pushed to transport the powder storage tank 1 to the designated cleaning area. There is no need to process the powder in place at the fluidized bed reactor working site, which further eliminates dust dispersion and leakage of irritating odors at the working site. Combined with the sealed structure of the powder storage tank 1, the entire process from powder reception to cleaning is achieved without contact pollution.

[0032] like Figure 2 and Figure 3As shown, the dust suppression component 5 includes a water inlet pipe 51 and a spray pipe 52. The water inlet pipe 51 is connected to the top of the powder storage tank 1, and the spray pipe 52 is connected to the inside of the powder storage tank 1. The water inlet end of the water inlet pipe 51 is connected to an external water source, and the water outlet end of the water inlet pipe 51 extends into the inside of the powder storage tank 1 and is connected to the spray pipe 52.

[0033] In this embodiment, the water inlet pipe 51 is connected to the top of the powder storage tank 1 and a stable water source is connected to the water inlet end, which can continuously provide sufficient water for dust suppression. Its water outlet end extends directly into the tank and is connected to the spray pipe fitting 52 to ensure that the water flow is accurately delivered to the powder area inside the tank. The spray pipe fitting 52 is installed inside the powder storage tank 1 and can convert the water flow delivered by the water inlet pipe 51 into a uniformly distributed water mist. Compared with the traditional method of directly adding water, it can form a larger contact area with the powder inside the tank, realize the all-round and no dead corner wetting of the powder, and completely eliminate the dust residue and dispersion caused by insufficient wetting.

[0034] like Figure 2 and Figure 3 As shown, the spray pipe fitting 52 includes a temporary storage ring pipe 521, which is connected to the water outlet end of the water inlet pipe 51. Multiple atomizing nozzles 522 are evenly distributed around the bottom of the temporary storage ring pipe 521.

[0035] In this embodiment, the temporary storage ring pipe 521 is directly connected to the water outlet of the water inlet pipe 51, which can temporarily store water flow and evenly distribute water pressure. Multiple atomizing nozzles 522 evenly distributed circumferentially at the bottom of the temporary storage ring pipe 521 can convert the water flow transported by the temporary storage ring pipe 521 into fine and uniform atomized water mist. Moreover, the circumferential distribution design can achieve 360° coverage of the powder storage tank 1 without dead angles. Compared with traditional single-point water addition or non-uniform spraying, it greatly improves the contact area and contact efficiency between water mist and powder.

[0036] Specifically, the dense water mist formed by the simultaneous spraying of multiple atomizing nozzles 522 can quickly penetrate into the interior of the powder accumulation layer, ensuring that every part of the powder is fully wetted, and completely eliminating dust residue caused by incomplete local wetting, as well as secondary dust during transportation or cleaning.

[0037] like Figure 1 and Figure 2 As shown, the powder storage tank 1 is equipped with a pressure sensor 10 for monitoring the air pressure inside the tank, and a pressure relief valve 14 is installed on the top of the powder storage tank 1.

[0038] In this embodiment, a pressure sensor 10 is installed inside the powder storage tank 1 to monitor the changes in internal air pressure in real time during unloading, nitrogen replacement, and spraying processes. This provides accurate data support for pressure control and avoids the risk of misoperation caused by relying on experience to judge air pressure manually. The pressure relief valve 14 set at the top forms a linkage protection with the pressure sensor 10. When the pressure sensor 10 detects that the internal air pressure exceeds the safety threshold, the pressure relief valve 14 automatically opens to release pressure, quickly balances the internal pressure, and prevents the powder storage tank 1 from failing to seal, leaking gas, or deforming and being damaged due to excessive air pressure.

[0039] Specifically, the mobile component 2 is equipped with a control box 11 electrically connected to the pressure sensor 10, and the control box 11 is equipped with an alarm 12. The control box 11 can receive the tank pressure data transmitted by the pressure sensor 10 in real time, allowing the operator to intuitively grasp the tank pressure status without opening the lid for inspection. When the pressure sensor 10 detects that the tank pressure exceeds the safety threshold, the alarm 12 will issue an audible and visual warning in a timely manner, reminding the operator to take targeted measures such as depressurization and nitrogen replenishment.

[0040] like Figure 1 and Figure 2 As shown, a guide plate 13 is provided inside the powder storage tank 1; the guiding effect of the guide plate 13 can reduce the adhesion and residue of powder in the tank, and the powder can fall smoothly during subsequent cleaning and discharge, reducing the workload and operation intensity of manually cleaning the residual powder in the tank.

[0041] Working principle: The operator uses the handrail 203 on one side of the moving frame 201 in the moving component 2, along with the moving wheels 202 at the bottom, to push the device to the designated position. The quick connector 4 at the end of the powder inlet pipe 3 on the powder storage tank 1 is then quickly and sealed to the powder discharge pipe 9 of the fluidized bed reactor. Nitrogen gas is then introduced into the tank through the nitrogen inlet pipe 6, and gas replacement is completed through the exhaust pipe 7, maintaining a slightly positive pressure inert environment, effectively diluting flammable gases such as acetylene carried in the dust. During discharge, the pressure sensor 10 monitors in real time. The pressure inside the tank is measured. If it exceeds the safety threshold, the top pressure relief valve 14 automatically releases the pressure. After unloading, the water inlet pipe 51 in the dust suppression component 5 is connected to an external water source, and the water flow is delivered to the temporary storage ring pipe 521. The water then forms a 360° atomized spray with evenly distributed atomizing nozzles 522 at its bottom, thoroughly wetting the powder and suppressing dust and odor leakage from the source. Finally, the powder storage tank 1 is transferred to a designated area by the moving component 2, and the side discharge door 8 is opened for convenient cleaning. The entire process does not require manual contact with the powder in place. The overall structure ensures no dust leakage through the quick connector 4 and the sealed powder storage tank 1. The nitrogen inlet pipe 6 and the exhaust pipe 7 eliminate the risk of explosion. The atomized spray component achieves deep dust suppression. The pressure sensor 10, the pressure relief valve 14, the control box 11, and the alarm 12 provide multiple safety protections. The moving component 2 reduces labor intensity and works together to achieve a comprehensive effect of environmental compliance, safety control, and efficient operation.

[0042] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An environmentally friendly device for changing the unloading method of fluidized bed catalysts, characterized in that, It includes a powder storage tank (1) and a moving assembly (2). The powder storage tank (1) is mounted on the moving assembly (2). The top of the powder storage tank (1) is connected to a powder inlet pipe (3). The end of the powder inlet pipe (3) is provided with a quick connector (4) for connecting with the powder discharge pipe (9) of the fluidized bed reactor. The powder storage tank (1) is also equipped with a dust suppression component (5), a nitrogen inlet pipe (6) and an exhaust pipe (7), and the side of the powder storage tank (1) is provided with an openable and closable discharge door (8). The dust suppression component (5) is used to wet the powder.

2. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The moving component (2) includes a moving frame (201), the bottom of which is connected to a plurality of moving wheels (202), and a handrail (203) is connected to one side of the moving frame (201).

3. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The dust suppression component (5) includes a water inlet pipe (51) and a spray pipe (52). The water inlet pipe (51) is connected to the top of the powder storage tank (1), and the spray pipe (52) is connected to the inside of the powder storage tank (1). The water inlet end of the water inlet pipe (51) is connected to an external water source, and the water outlet end of the water inlet pipe (51) extends into the inside of the powder storage tank (1) and is connected to the spray pipe (52).

4. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 3, characterized in that, The spray pipe fitting (52) includes a temporary storage ring pipe (521), which is connected to the water outlet end of the water inlet pipe (51). Multiple atomizing nozzles (522) are evenly distributed around the bottom of the temporary storage ring pipe (521).

5. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The powder storage container (1) is equipped with a pressure sensor (10) for monitoring the air pressure inside the container.

6. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 5, characterized in that, The moving component (2) is provided with a control box (11) electrically connected to the pressure sensor (10), and the control box (11) is provided with an alarm (12).

7. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The powder storage tank (1) is equipped with a guide plate (13).

8. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The powder storage tank (1) is equipped with a pressure relief valve (14) on top.

9. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 1, characterized in that, The volume of the powder storage container (1) is 0.6-1.2 m³, and the powder storage container (1) is made of stainless steel.

10. The environmental protection device for changing the unloading method of fluidized bed catalyst as described in claim 3, characterized in that, Control valves (15) are installed on the powder inlet pipe (3), water inlet pipe (51), nitrogen inlet pipe (6) and exhaust pipe (7).

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