Automatic equipment for quantitatively adding solid powder catalyst

Abstract

The invention discloses automatic equipment for quantitatively adding a solid powder catalyst, which belongs to the technical field of solid powder addition of catalysts, and comprises an electronic scale, a stock bin, an airflow conveying pipe and a catalyst preparation tank, the material bin is arranged on the electronic scale, a feeding port is formed in the upper end of the material bin, a sealing cover is installed at the position of the feeding port, and a powder flow adjusting valve is installed at an outlet in the lower end of the material bin. A catalyst is added into the catalyst preparation tank through automatic equipment, the labor intensity of field operators is greatly reduced, after the first manual valve is closed, the throttling pipe can still guarantee that nitrogen circulates in the airflow conveying pipe and the powder conveying pipe, and powder blockage is prevented; nitrogen serves as inert gas, catalyst powder can be prevented from being affected with damp or oxidized in the conveying process, and it is ensured that the performance of the catalyst is stable.

Description

Technical Field

[0001] The present invention relates to the technical field of adding solid powder catalysts, and in particular to automated equipment for quantitatively adding solid powder catalysts. Background Art

[0002] Currently, in ethyl chloride production plants using the gas-phase ethylene-hydrogen chloride process, the reaction system uses ethyl chloride as the solvent and ferric chloride powder as the catalyst, which is insoluble in ethyl chloride solution. During the catalyst preparation process, the existing process requires manual pouring of bagged powdered catalyst into a catalyst preparation kettle. Since the plant operates continuously, on-site personnel need to prepare multiple kettles of catalyst per day, which not only increases the labor intensity for on-site operators, but also increases the catalyst's tendency to absorb moisture during the preparation process, impacting reaction efficiency. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of increased labor intensity and easy moisture absorption of catalysts in the continuous operation process mentioned in the above background technology.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions: Disclosed is automated equipment for quantitatively adding solid powder catalyst, comprising an electronic scale, a silo, an airflow conveying pipe, and a catalyst preparation tank; the silo is placed on the electronic scale, a feed port is provided at the upper end of the silo, a sealing cover is installed at the feed port, and a powder flow regulating valve is installed at the outlet of the lower end of the silo; the outlet end of the airflow conveying pipe is connected to the powder flow regulating valve, and a manual valve is installed on the airflow conveying pipe; the upper end of the catalyst preparation tank is connected to the powder flow regulating valve via the powder conveying pipe.

[0005] Preferably, a charging pipe is provided on one side of the silo, the end of the charging pipe is connected to the interior of the silo, the upper end of the air flow conveying pipe is connected to the charging pipe, and a manual valve 2 is installed at the air inlet end of the charging pipe.

[0006] Preferably, a manual valve three is installed on the pressure charging pipe.

[0007] Preferably, a throttle tube is provided between the pressure charging tube and the air flow conveying tube, the upper end of the throttle tube is located upstream of the connection point between the air flow conveying tube and the pressure charging tube, and the lower end of the throttle tube is located downstream of manual valve 1.

[0008] Preferably, a manual pressure relief valve is installed on the silo.

[0009] Preferably, a rotating shaft is rotatably connected to the silo, and a symmetrical scraper is fixed to the lower end of the rotating shaft. The scraper corresponds to the conical portion of the lower end of the silo, and the scraper is arranged at an angle.

[0010] Preferably, a cleaning plate is provided above the scraper, the cleaning plate is fixed to the rotating shaft, and the cleaning plate corresponds to the columnar portion of the silo.

[0011] Preferably, the rotating shaft emerges from the silo, and a driving device is provided at the upper end of the rotating shaft, and the driving device includes a motor for driving the rotating shaft.

[0012] Preferably, the driving device also includes a bracket 1, a transmission shaft is rotatably connected to the bracket 1, one end of the transmission shaft is connected to a bevel gear pair, the bevel gear pair and the rotating shaft are connected by a connecting sleeve, the connecting sleeve is arranged on the upper end of the rotating shaft, a limit bar is fixed to the upper end of the rotating shaft, a limit groove adapted to the limit bar is provided on the connecting sleeve, the output end of the motor is connected to a reduction gear group, and the output end of the reduction gear group and the transmission shaft are connected by a coupling.

[0013] Preferably, a bracket 2 for mounting the motor is provided on one side of the bracket 1.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention mainly reduces the labor intensity of traditional manual feeding by using the equipment for quantitatively adding solid powder. The catalyst is added to the catalyst preparation tank through automated equipment, which not only greatly reduces the labor intensity of on-site operators, but also reduces the moisture absorption of the catalyst, ensuring stable catalyst performance. The weight change of the powder in the silo is monitored in real time by an electronic scale to ensure the precise control of the catalyst addition amount and avoid human error. Nitrogen is used as the conveying medium to avoid powder blockage and ensure the continuity and stability of powder delivery. The symmetrically arranged scrapers match the conical part of the silo. The rotation of the scrapers separates the powder from the inner wall to avoid powder accumulation. The charging pipe controls nitrogen gas entering the silo through manual valves 2 and 3, maintaining positive pressure inside the silo and ensuring smooth outflow of powder. After manual valve 1 is closed, the throttle pipe can still ensure nitrogen flow in the air delivery pipe and the powder delivery pipe to prevent powder blockage. Nitrogen, as an inert gas, can prevent the catalyst powder from getting damp or oxidized during transportation, ensuring stable catalyst performance. The motor and reduction gear train drive the shaft to rotate slowly, reducing vibration, ensuring stable operation of the scraper and cleaning plate, and preventing powder residue. A rubber pad is installed at the bottom of the silo to reduce the impact of vibration on the electronic scale's weighing results, ensuring accurate weighing. Brackets 1 and 2 are installed separately to reduce the impact of motor vibration on the shaft and ensure stable rotation. A coupling further reduces vibration transmission between the drive shaft and reduction gear train, improving the stability of the equipment's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 Schematic diagram of the driving device of the present invention.

[0018] Figure 3 It is a top view schematic diagram of the driving device of the present invention.

[0019] Figure 4 It is a schematic diagram of the scraper and cleaning plate of the present invention.

[0020] Explanation of the figure numbers: 1. Electronic scale; 2. Silo; 21. Feed inlet; 22. Sealing cover; 23. Manual pressure relief valve; 24. Rotating shaft; 25. Scraper; 26. Cleaning plate; 27. Rubber pad; 3. Air flow conveying pipe; 31. Manual valve 1; 4. Catalyst preparation tank; 5. Powder flow regulating valve; 6. Powder conveying pipe; 7. Charging pipe; 71. Manual valve 2; 72. Manual valve 3; 8. Throttle pipe; 9. Driving device; 91. Motor; 92. Bracket 1; 93. Transmission shaft; 94. Bevel gear pair; 95. Connecting sleeve; 96. Limit strip; 97. Reduction gear set; 98. Coupling; 99. Bracket 2. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below with reference to the accompanying drawings.

[0022] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limiting the present invention.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0025] See also Figure 1 - Figure 4 , an automated equipment for quantitatively adding solid powder catalyst, including an electronic scale 1, a silo 2, an air flow conveying pipe 3 and a catalyst preparation tank 4, the silo 2 is placed on the electronic scale 1, and a feed port 21 is provided at the upper end of the silo 2, and a sealing cover 22 is installed at the feed port 21, and the sealing cover 22 blocks the feed port 21, and a powder flow regulating valve 5 is installed at the outlet of the lower end of the silo 2, and the powder flow regulating valve 5 controls the opening and closing of the outlet of the lower end of the silo 2. The powder flow regulating valve 5 is a prior art and will not be introduced in detail.

[0026] The outlet end of the airflow conveying pipe 3 is connected to the powder flow regulating valve 5. A manual valve 31 is installed on the airflow conveying pipe 3. When the manual valve 31 is opened, the airflow enters the airflow conveying pipe 3, and then the powder falling from the silo 2 is conveyed away. A pressure relief manual valve 23 is installed on the silo 2. The pressure relief manual valve 23 is used to relieve the pressure of the silo 2. After the pressure is relieved, the silo 2 is loaded.

[0027] The upper end of the catalyst preparation tank 4 is connected to the powder flow regulating valve 5 through a powder delivery pipe 6. The powder enters the powder delivery pipe 6 through the air flow and then enters the catalyst preparation tank 4. A stirring device is provided in the catalyst preparation tank 4.

[0028] A charging pipe 7 is provided on one side of the silo 2, and the end of the charging pipe 7 is connected to the inside of the silo 2, and the upper end of the air flow conveying pipe 3 is connected to the charging pipe 7. A manual valve 2 71 is installed at the air inlet end of the charging pipe 7. The manual valve 2 71 controls whether the air flow enters the silo 2. The air flow in the charging pipe 7 can enter the silo 2 and the air flow conveying pipe 3. The manual valve 2 71 is used to pressurize the silo 2 to maintain a positive pressure in the silo 2. When the powder flow regulating valve 5 is opened, the powder can be pressed down. A manual valve 3 72 is installed on the charging pipe 7. The charging pipe 7 is connected to a nitrogen storage tank, which is not shown in the figure. The manual valve 3 72 controls whether nitrogen enters the charging pipe 7.

[0029] A throttle tube 8 is installed between the pressure-charging pipe 7 and the airflow conveying pipe 3. Its upper end is located upstream of the connection between the airflow conveying pipe 3 and the pressure-charging pipe 7, and its lower end is located downstream of the manual valve 1 31. After the manual valve 1 31 is closed, the throttle tube 8 ensures that nitrogen continues to flow through the airflow conveying pipe 3 and the powder conveying pipe 6. Even if the powder flow control valve 5 is not fully closed, the powder can be smoothly transported to the catalyst preparation tank 4 by nitrogen, avoiding equipment downtime. Manual valve 1 31, manual valve 2 71, manual valve 3 72, and manual pressure relief valve 23 are common industrial devices used to control fluid flow and regulate pressure, and will not be described in detail.

[0030] like Figures 2 to 4 As shown, in order to further enable the powder in the silo 2 to flow out completely, a scraping component is provided in the silo 2.

[0031] A rotating shaft 24 is rotatably connected to the silo 2. The silo 2 consists of a conical portion at the lower side and a columnar portion at the upper side. A symmetrical scraper 25 is fixed to the lower end of the rotating shaft 24. The symmetrical scraper 25 is conducive to the stability of rotation. The scraper 25 corresponds to the conical portion at the lower end of the silo 2. The scraper 25 is tilted, and the angle between the scraper 25 and the conical portion is less than 90°, which facilitates the separation of the powder from the inner wall of the silo 2 and does not cause excessive churning and movement of the powder.

[0032] A cleaning plate 26 is provided above the scraper 25. The cleaning plate 26 is fixed to the rotating shaft 24. The cleaning plate 26 corresponds to the columnar part of the silo 2. The cleaning plate 26 is inclined like the scraper 25. The cleaning plate 26 is used to clean the inner wall of the columnar part. The scraper 25 and the cleaning plate 26 prevent the powder from accumulating in the silo 2, so that the catalyst preparation tank 4 can be accurately dosed.

[0033] The rotating shaft 24 emerges from the silo 2, and a driving device 9 is provided on the upper end of the rotating shaft 24. The driving device 9 includes a motor 91 for driving the rotating shaft 24. The driving device 9 also includes a bracket 92. A transmission shaft 93 is rotatably connected to the bracket 92. One end of the transmission shaft 93 is connected to a bevel gear pair 94. The bevel gear pair 94 is connected to the rotating shaft 24 through a connecting sleeve 95. The bevel gear pair 94 is composed of two meshing bevel gears. One bevel gear in the bevel gear pair 94 is fixed to the transmission shaft 93, and the other bevel gear is fixed to the connecting sleeve 95. The connecting sleeve 95 is sleeved on the upper side of the rotating shaft 24. The upper end of the rotating shaft 24 is fixed with a limit strip 96, and the connecting sleeve 95 is provided with a limit groove adapted to the limit strip 96. The connecting sleeve 95 enables the hopper 2 to be stably connected to the rotating shaft 24 before and after feeding. The output end of the motor 91 is connected to a reduction gear set 97, which is composed of a plurality of large gears and small gears meshing. The reduction gear set 97 is used to reduce speed so that the rotating shaft 24 rotates slowly. The reduction gear set 97 also has the effect of reducing the vibration of the rotating shaft 24. The output end of the reduction gear set 97 is connected to the transmission shaft 93 through a coupling 98. A rubber pad 27 is provided at the bottom of the silo 2 and is fixed to the electronic scale 1. This pad has a shock-absorbing effect, ensuring accurate weighing on the electronic scale 1. A second bracket 99 for mounting the motor 91 is provided on one side of the bracket 1 92. The brackets 1 92 and 2 99 are separately mounted on the ground. This separation reduces the impact of the vibration of the motor 91 on the rotating shaft 24. The vibration of the rotating shaft 24 is further reduced by the coupling 98, allowing the rotating shaft 24 to rotate stably. This reduced vibration of the rotating shaft 24 ensures accurate results on the electronic scale 1. The motor 91 can be started when the silo 2 is discharging material, or it can be kept in an activated state.

[0034] When in use, the first step is to add powder to the silo 2 for the first time: close the manual valve 1 31, the manual valve 2 71, the manual valve 3 72 and the pressure relief manual valve 23; weigh the empty silo and record the weight MO; then open the cover 22, add powder from the feed port 21, weigh M1, and then cover the cover 22.

[0035] The second step is to add iron powder to the catalyst preparation tank 4: first confirm that the pressure relief manual valve 23 is closed, open manual valve 1 31, manual valve 2 71 and manual valve 3 72, and then slowly open the powder flow regulating valve 5 to adjust the powder feed amount; specifically, when catalyst needs to be added, slowly open the powder flow regulating valve 5, and the catalyst powder in the silo 2 is pressed into the powder flow regulating valve 5 by nitrogen and then brought into the catalyst preparation tank 4 by the nitrogen in the air flow conveying pipe 3, thereby achieving the purpose of automatically adding catalyst powder.

[0036] The third step is to stop the powder adding operation: observe the changes in the weighing quantity of the electronic scale 1. When it reaches the set value, first close the powder flow regulating valve 5, and then close the manual valve 1 31 and the manual valve 2 71. (When repeating the iron powder adding operation, first open the manual valve 1 31, then open the manual valve 2 71, and finally slowly open the powder flow regulating valve 5).

[0037] In the fourth step, when the weighing value Mn is close to MO, it is determined that the iron powder in the silo 2 is empty, and the powder flow regulating valve 5 is closed. Then, the manual valve 2 71 is closed, and then the manual valve 1 31 is closed, and finally, the manual valve 3 72 is closed. The pressure relief manual valve 23 is opened to relieve the pressure of the silo 2. After the pressure is relieved, the cover 22 is opened and the powder is added to the silo 2.

[0038] The throttle pipe 8 is generally designed to have a very small diameter (68 diameter), and its main purpose is to ensure that nitrogen is always flowing in the air jet conveying pipe 3 and the powder conveying pipe 6. When the manual valve 31 is not opened, the powder flow regulating valve 5 has a certain opening degree, which can ensure that there is a certain amount of nitrogen in the air jet conveying pipe 3 to carry the catalyst powder into the catalyst preparation tank 4, thereby preventing the catalyst powder from being completely blocked at the powder flow regulating valve 5.

[0039] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. An automated device for quantitatively adding a solid powder catalyst, characterized in that: include: Electronic scale (1); A silo (2) is placed on the electronic scale (1), wherein the upper end of the silo (2) is provided with a feed port (21), a sealing cover (22) is installed at the feed port (21), and a powder flow regulating valve (5) is installed at the outlet of the lower end of the silo (2); An air flow conveying pipe (3), the outlet end of which is connected to the powder flow regulating valve (5), and a manual valve (31) is installed on the air flow conveying pipe (3); The catalyst preparation tank (4) has its upper end connected to the powder flow regulating valve (5) via a powder delivery pipe (6).

2. The automated equipment for quantitatively adding solid powder catalyst according to claim 1, characterized in that: A pressure charging pipe (7) is provided on one side of the silo (2), the end of the pressure charging pipe (7) is communicated with the interior of the silo (2), the upper end of the air flow conveying pipe (3) is communicated with the pressure charging pipe (7), and a manual valve 2 (71) is installed at the air inlet end of the pressure charging pipe (7).

3. The automated equipment for quantitatively adding a solid powder catalyst according to claim 2, characterized in that: A manual valve three (72) is installed on the pressure charging pipe (7).

4. The automated equipment for quantitatively adding a solid powder catalyst according to claim 2, characterized in that: A throttle tube (8) is provided between the pressure charging tube (7) and the air flow conveying tube (3), the upper end of the throttle tube (8) is located upstream of the connection point between the air flow conveying tube (3) and the pressure charging tube (7), and the lower end of the throttle tube (8) is located downstream of the manual valve 1 (31).

5. The automated equipment for quantitatively adding solid powder catalyst according to claim 1, characterized in that: A pressure relief manual valve (23) is installed on the silo (2).

6. The automated equipment for quantitatively adding solid powder catalyst according to claim 1, characterized in that: A rotating shaft (24) is rotatably connected to the silo (2), and a symmetrical scraper (25) is fixed to the lower end of the rotating shaft (24). The scraper (25) corresponds to the conical portion at the lower end of the silo (2), and the scraper (25) is arranged at an angle.

7. The automated equipment for quantitatively adding solid powder catalyst according to claim 6, characterized in that: A cleaning plate (26) is provided above the scraper (25), the cleaning plate (26) being fixed to the rotating shaft (24), and the cleaning plate (26) corresponding to the columnar portion of the silo (2).

8. The automated equipment for quantitatively adding solid powder catalyst according to claim 7, characterized in that: The rotating shaft (24) emerges from the silo (2), and a driving device (9) is provided at the upper end of the rotating shaft (24). The driving device (9) includes a motor (91) that drives the rotating shaft (24).

9. The automated equipment for quantitatively adding solid powder catalyst according to claim 8, characterized in that: The driving device (9) further comprises a bracket (92), a transmission shaft (93) being rotatably connected to the bracket (92), one end of the transmission shaft (93) being connected to a bevel gear pair (94), the bevel gear pair (94) being connected to the rotating shaft (24) via a connecting sleeve (95), the connecting sleeve (95) being sleeved on the upper end of the rotating shaft (24), a limiting strip (96) being fixed to the upper end of the rotating shaft (24), a limiting groove being provided on the connecting sleeve (95) being adapted to the limiting strip (96), the output end of the motor (91) being connected to a reduction gear set (97), the output end of the reduction gear set (97) being connected to the transmission shaft (93) via a coupling (98).

10. The automated equipment for quantitatively adding solid powder catalyst according to claim 9, characterized in that: A second bracket (99) for mounting the motor (91) is provided on one side of the first bracket (92).

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