A discharge air lock for a sodium carboxymethyl cellulose stripper

Abstract

The utility model relates to a discharge air lock of sodium carboxymethyl cellulose stripping machine, including box, the rotating shaft of axle connection in the box and the motor of drive rotating shaft rotation, be equipped with the cavity of cylindrical in the box, and the upper and lower ends of box are opened respectively and have the feed inlet and the discharge port, the feed inlet is linked together with the stripping machine export, is equipped with three blades of circumferential uniform distribution on the rotating shaft, the blade is attached with the outer ring and the side wall of cavity, and the blade is fixedly connected with the sleeve pipe, the sleeve pipe is sleeved on the rotating shaft and three sleeve pipes are arranged on the rotating shaft axially, the rotating shaft is opened and has the mounting slot of axial extension, the inner ring of sleeve pipe is fixedly connected with the protruding piece in the mounting slot, both sides of the protruding piece are equipped with the spring, the utility model is in the feed section because of the blade included angle that negative pressure acts is reduced moderately, is favorable to maintaining system tightness, and when the blade turns to the discharge section, the included angle is increased automatically under the spring restoring force, promotes the material that accumulates to drop off smoothly, prevents the jam effectively.

Description

Technical Field

[0001] This utility model relates to the field of airlock technology, specifically to an airlock for the discharge of a sodium carboxymethyl cellulose stripper. Background Technology

[0002] In the production of sodium carboxymethyl cellulose, the separation and recovery of ethanol is a key factor affecting product purity and production costs. The stripper, as the core equipment for ethanol separation, effectively promotes the evaporation and separation of ethanol components by thoroughly mixing saturated steam with the material and supplementing it with vacuum suction. In this process, the rotary valve plays a crucial role, ensuring a continuous and stable discharge of the stripped solid material from the bottom while maintaining the necessary negative pressure inside the stripper to prevent air from entering and affecting separation efficiency. However, because sodium carboxymethyl cellulose often presents as a viscous, flocculent form after stripping, traditional rotary valves frequently experience material clumping and blockage between the blades during operation, leading to poor material flow or even equipment jamming. This severely impacts the continuity and stability of production and also adversely affects the sealing performance of the stripping system. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a discharge airlock for a sodium carboxymethyl cellulose stripper.

[0004] This utility model is achieved through the following technical solution: providing a discharge airlock for a sodium carboxymethyl cellulose stripper, comprising a housing, a rotating shaft connected to the housing, and a motor for driving the rotating shaft to rotate. The housing has a cylindrical cavity, with an inlet and an outlet at the upper and lower ends of the housing, respectively. The inlet is connected to the outlet of the stripper. The rotating shaft is equipped with three circumferentially distributed blades, which fit against the outer ring and side wall of the cavity. A sleeve is fixed to the blade, and the sleeve is fitted onto the rotating shaft with the three sleeves axially arranged on the rotating shaft. An axially extending mounting groove is opened on the rotating shaft, and a protrusion located in the mounting groove is fixed to the inner ring of the sleeve. Springs are installed on both sides of the protrusion.

[0005] In this design, the protrusion is located in the mounting groove, allowing the sleeve to rotate and float on the shaft to a certain extent. The springs on both sides of the protrusion keep it in the middle position. In the feeding section, the blade angle is moderately reduced due to the negative pressure, which helps maintain the system's sealing performance. When the blade rotates to the discharge section, the angle automatically increases under the spring's restoring force, which promotes the smooth discharge of accumulated material and effectively prevents blockage.

[0006] As an optimization, the mounting slots on both sides of the protrusion are provided with grooves, and the spring is disposed within the grooves. The grooves provided in this design can accommodate the axial movement of the spring and also facilitate increasing the length of the spring and the floating amount of the protrusion.

[0007] As an optimization, the three sleeves are sequentially fitted and connected, and the total length of the three sleeves is equal to the length of the blade. This ensures that the total length of the three sleeves matches the length of the blade, and that the ends fit snugly against the sidewall of the cavity.

[0008] As an optimization, the mounting groove extends to one end of the shaft. This facilitates the entry of the protrusion into the mounting groove from the end.

[0009] As an optimization, the rotating shaft is connected to the motor shaft via a magnetic coupler. This achieves a flexible connection, reducing impact and vibration, and providing overload protection.

[0010] As an optimization, a speed sensor is installed at the end of the shaft. This sensor detects the rotational speed of the shaft, and if the rotational speed is abnormal, it indicates that the shaft is stuck internally.

[0011] As an optimization, the enclosure is bolted with an inspection cover to facilitate internal maintenance.

[0012] The beneficial effects of this invention are as follows: The discharge airlock of the sodium carboxymethyl cellulose stripper of this invention introduces a sleeve and spring mechanism into the connection structure between the blades and the rotating shaft, allowing the blades to dynamically adjust their included angle according to the working conditions during rotation. In the feeding section, the blade included angle is moderately reduced due to the negative pressure, which helps maintain the system's sealing performance; while when the blades rotate to the discharge section, the included angle automatically increases under the action of the spring's restoring force, promoting the smooth discharge of accumulated material and effectively preventing blockage. This design not only improves the smoothness and continuity of material discharge but also ensures the stability of the negative pressure environment inside the stripper, thereby improving the operating efficiency and reliability of the entire stripping process and providing strong support for the clean and efficient production of sodium carboxymethyl cellulose. Attached Figure Description

[0013] Figure 1 This is a front view of the present utility model; Figure 2 This utility model Figure 1 Sectional view of plane AA; Figure 3 This is a schematic diagram of the structure of the shaft and blades of this utility model; Figure 4 This is an exploded view of the shaft and blades of this utility model; Figure 5 This is a schematic diagram of the structure of the rotating shaft of this utility model; Figure 6 This is a top view of the rotating shaft and blades of this utility model; Figure 7 This utility model Figure 6 Sectional view of the middle BB surface; As shown in the figure: 1. Housing, 2. Shaft, 3. Inlet, 4. Outlet, 5. Magnetic coupler, 6. Motor, 7. Speed ​​sensor, 8. Inspection cover, 9. Blade, 10. Sleeve, 11. Mounting groove, 12. Groove, 13. Spring, 14. Protrusion. Detailed Implementation

[0014] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0015] like Figures 1-7 As shown, the present invention discloses a discharge airlock for a sodium carboxymethyl cellulose stripper, comprising a housing 1, a rotating shaft 2 connected within the housing 1, and a motor 6 for driving the rotating shaft 2 to rotate. The upper end of the housing 1 is connected to the outlet of the stripper by bolts. The upper and lower ends of the housing 1 are respectively provided with a feed inlet 3 and a discharge outlet 4. The feed inlet 3 is connected to the outlet of the stripper, and the discharge outlet 3 outputs the material from the stripper.

[0016] The housing 1 has a cylindrical cavity with its axis horizontally aligned. The inlet 3 and outlet 4 are connected to the upper and lower ends of the cavity, respectively. A maintenance cover 8 is bolted to the housing 1 for internal maintenance.

[0017] Both ends of the rotating shaft 2 extend out of the housing 1. One end of the rotating shaft 2 is connected to the rotating shaft of the motor 6 via a magnetic coupler 5. The other end of the rotating shaft 2 is equipped with a speed sensor 7. The motor 6 is a servo motor. When the speed of the speed sensor 7 is different from the speed of the servo motor, it indicates that there is significant internal resistance or jamming, requiring maintenance.

[0018] The rotating shaft 2 is coaxially arranged with the cavity. Three blades 9 are evenly distributed around the circumference on the rotating shaft 2. The blades 9 have a rectangular structure and are in contact with the outer ring and side wall of the cavity. Therefore, when the rotating shaft 2 rotates, it drives the three blades 9 to rotate. The adjacent blades 9 form a closed fan-shaped cavity. When the fan-shaped cavity is connected to the feed port 3, it feeds material, and when it is connected to the discharge port 4, it discharges material.

[0019] The blade 9 is mounted on the rotating shaft via a sleeve 10. Specifically, a sleeve 10 is fixedly connected to the blade 9, and the sleeve 10 is fitted onto the rotating shaft 2. Figure 4 As shown, since the three blades 9 are evenly distributed around the circumference and have the same shape, in order to be installed on the same rotating shaft at the same time, the three sleeves 10 are installed in different positions on their respective blades 9. One of them is installed in the middle position along the length of the blade 9, and the other two are installed at the ends of their respective blades. This makes the three sleeves 10 axially arranged on the rotating shaft 2, and the three sleeves 10 are connected in sequence and the total length of the three sleeves 10 is equal to the length of the blade 9.

[0020] To prevent the sleeve 10 from rotating freely on the shaft 2, an axially extending mounting groove 11 is provided on the shaft 2, extending to one end of the shaft 2. A protrusion 14 located within the mounting groove 11 is fixed to the inner ring of the sleeve 10, and the width of the protrusion 14 is slightly smaller than the width of the mounting groove.

[0021] Springs 13 are installed on both sides of the protrusion 14. In this embodiment, grooves 12 are provided on the mounting slots 11 on both sides of the protrusion 14, and the springs 13 are disposed in the grooves 12.

[0022] How to use this utility model: During use, sodium carboxymethyl cellulose in the stripper flows from the outlet to the feed inlet 3 at the top of the housing 1. The sodium carboxymethyl cellulose enters between two adjacent blades 9. The rotation of the blades 9 rotates this portion of sodium carboxymethyl cellulose to the discharge outlet 4, where it is discharged. Due to the sealing effect of the blades, a negative pressure environment is maintained in the stripper.

[0023] Meanwhile, since the stripper is in a negative pressure environment, when the two blades wrap around the feed inlet 3, the negative pressure will cause the included angle between the two blades 9 to decrease. When the two blades move to the discharge outlet 4, the included angle between the two blades 9 will increase again under the elastic force of the spring, thus facilitating the falling of sodium carboxymethyl cellulose between the two blades 9.

[0024] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A discharge airlock for a sodium carboxymethyl cellulose stripper, characterized in that: The device includes a housing (1), a rotating shaft (2) connected to the housing (1), and a motor (6) that drives the rotating shaft (2) to rotate. The housing (1) has a cylindrical cavity. The housing (1) has an inlet (3) and an outlet (4) at its upper and lower ends, respectively. The inlet (3) is connected to the outlet of the stripper. The rotating shaft (2) is equipped with three blades (9) evenly distributed around the circumference. The blades (9) are in contact with the outer ring and side wall of the cavity. A sleeve (10) is fixed to the blade (9). The sleeve (10) is sleeved on the rotating shaft (2) and the three sleeves (10) are axially arranged on the rotating shaft (2). The rotating shaft (2) has an axially extending mounting groove (11). The inner ring of the sleeve (10) is fixed with a protrusion (14) located in the mounting groove (11). Springs (13) are installed on both sides of the protrusion (14).

2. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The mounting grooves (11) on both sides of the protrusion (14) are provided with grooves (12), and the spring (13) is set in the grooves (12).

3. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The three sleeves (10) are connected in sequence and the total length of the three sleeves (10) is equal to the length of the blade (9).

4. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The mounting groove (11) extends to one end of the rotating shaft (2).

5. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The rotating shaft (2) is connected to the rotating shaft of the motor (6) via a magnetic coupler (5).

6. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The end of the rotating shaft (2) is equipped with a speed sensor (7).

7. The discharge airlock of a sodium carboxymethyl cellulose stripper according to claim 1, characterized in that: The housing (1) is bolted with an inspection cover plate (8).

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