Washing kettle for cellulose ether production

Abstract

The utility model relates to a washing kettle for producing cellulose ether, and belongs to the field of washing kettle equipment. Comprising a horizontally-placed cylindrical kettle body and a supporting frame used for supporting the kettle body, a stirring device is arranged on the inner wall of the kettle body, a driving device is arranged on the supporting frame, and the driving device drives the kettle body to rotate. A feeding pipe and a discharging pipe which are coaxially arranged are rotationally connected to the two axial ends of the kettle body respectively, and the feeding pipe and the discharging pipe are in through connection with an inner cavity of the kettle body. According to the utility model, a stirring paddle is removed, the interior of the kettle body is automatically cleaned by a sprayed detergent, and shutdown caused by cleaning attachments is not needed, so that the production continuity is improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of washing kettle equipment, in particular to a washing kettle for producing cellulose ether. Background Art

[0002] In the process of cellulose ether production, the crude cellulose ether is sent to the solid-liquid separation equipment to obtain slurry after neutralizing the excess alkali and removing the solvent. The obtained slurry is introduced into the washing kettle and washed multiple times with detergent (usually soft water) at a certain temperature to wash away the solvent on the surface of the cellulose ether and the salt generated by the neutralization reaction.

[0003] On May 5, 2023, a Chinese patent was authorized to announce a washing kettle for cellulose ether production with an announcement number of CN218963400U, including: a kettle body placed at the lower end and a kettle cover connected to the upper end of the kettle body; the kettle body contains: a baffle and an annular diverter pipe placed on the inner wall, an observation window is arranged on one side of the kettle body, the annular diverter pipe is located above the baffle, and the kettle cover is provided with a detergent introduction pipe, a flange base, a feed port, a steam introduction pipe, and a stirring mechanism; the washing condition in the washing kettle can be observed by installing an observation window, and the cleaning nozzle installed on the observation window solves the problem of slurry splashing blocking the observation field. This patent improves the washing efficiency, but the main body is still stirred by a stirring paddle, and the slurry has a certain viscosity, which makes it easy for the slurry or even some powdered cellulose ether to adhere to the stirring paddle. As the use time increases, the thickness of the slurry attached to the stirring paddle gradually increases, affecting the stirring efficiency and increasing energy consumption. It is also necessary to open the kettle body regularly, take out the stirring paddle, and clean it, which not only adds additional maintenance work, but also requires shutdown during maintenance, affecting production. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a washing kettle for cellulose ether production. The utility model removes the stirring paddle, and the inside of the kettle body is self-cleaned by spraying detergent, without stopping the machine for cleaning attachments, thereby improving the continuity of production and reducing the labor intensity of workers.

[0005] The technical solution adopted by the utility model to solve the problems existing in the prior art is:

[0006] A washing kettle for producing cellulose ether comprises a horizontally placed cylindrical kettle body and a support frame for supporting the kettle body. A stirring device is arranged on the inner wall of the kettle body and a driving device is arranged on the support frame. The driving device drives the kettle body to rotate.

[0007] The two ends of the axial direction of the kettle body are rotatably connected with a coaxially arranged feed pipe and a discharge pipe, and the feed pipe and the discharge pipe are connected through the inner cavity of the kettle body.

[0008] Preferably, the driving device is a motor, a coaxially arranged driven wheel is fixed to the outside of the kettle body, a driving wheel is provided on the output shaft of the motor, and the driving wheel drives the driven wheel to rotate.

[0009] Preferably, the driving wheel drives the driven wheel to rotate through a transmission device.

[0010] Preferably, a plurality of stirring devices are distributed in a circular array around the axis of the kettle body.

[0011] Preferably, the cross-sectional shape of the stirring device along the radial direction of the kettle body is an isosceles trapezoid.

[0012] Preferably, the feed pipe comprises a vertical pipe and a horizontal pipe, the horizontal pipe is coaxially arranged with the kettle body, a through hole is provided in the middle of the horizontal pipe, and a plurality of feed holes are arranged around the through hole.

[0013] One end of the feed hole is connected with the inner cavity of the kettle body, and the other end is connected with an annular cavity, and the annular cavity is connected with the vertical pipe.

[0014] A detergent pipe is passed through the middle through hole of the horizontal pipe, the detergent pipe is inserted into the inside of the kettle body, and a spray hole is arranged on the detergent pipe located inside the kettle body.

[0015] Preferably, the nozzle outlet is arranged upward.

[0016] Preferably, two spray holes inclined upward are provided at the same axial position of the detergent tube, the angle between the two spray holes is 70-120°, and the two spray holes are symmetrically arranged around the axis of the detergent tube.

[0017] Preferably, a discharge cavity is provided at one end of the kettle body close to the discharge pipe, and the stirring device is located outside the discharge cavity.

[0018] The discharge pipe comprises a vertical pipe and a horizontal pipe. The vertical pipe is located inside the discharge cavity, the inlet of the vertical pipe is arranged vertically downward, and the end of the horizontal pipe is passed through to the outside of the kettle body.

[0019] Preferably, the outside of the kettle body is wrapped with a heat-insulating layer.

[0020] Compared with the prior art, the utility model has the following beneficial effects:

[0021] (1) The stirring paddle is removed from the washing kettle, so it does not need to be cleaned regularly, thereby reducing the frequency of maintenance and ensuring the continuity of production.

[0022] (2) The inside of the kettle is cleaned by spraying detergent to prevent the slurry from adhering to the inner wall of the kettle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 This is a structural diagram of a utility model washing kettle for cellulose ether production.

[0025] Figure 2 This is a horizontal cross-sectional view of a washing kettle for producing cellulose ether in the utility model.

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle A.

[0027] Figure 4 This is a vertical cross-sectional view of the middle part of a washing kettle for cellulose ether production in the utility model.

[0028] Figure 5 for Figure 4 A partial enlarged view of point B in the middle.

[0029] Figure 6 This is a vertical cross-sectional view of the discharge chamber of a washing kettle for cellulose ether production in the utility model.

[0030] Figure 7 This is a utility model structural diagram of the feeding and discharging and detergent spray pipe assembly in a washing kettle for cellulose ether production.

[0031] Figure 8 The utility model discloses a structural diagram of a feed pipe of a washing kettle for producing cellulose ether.

[0032] In the figure: 1-kettle body, 101-stirring device, 102-discharge chamber, 103-cam tube, 2-driven wheel, 3-driving wheel, 4-motor, 5-transmission device, 6-feed pipe, 601-annular chamber, 602-feed hole, 7-discharge pipe, 8-detergent pipe, 801-spray hole, 9-support frame, 10-annular slot, 11-annular sleeve cap, 12-insulation layer. DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the present application. The terms used herein are only for the purpose of describing specific implementation methods and are not intended to limit the present application embodiments.

[0034] In addition, in the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the drawings. Therefore, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0035] The following is a further detailed description of a washing kettle for cellulose ether production according to the utility model in conjunction with the accompanying drawings.

[0036] A washing kettle for producing cellulose ether comprises a horizontally placed cylindrical kettle body 1 and a support frame 9 for supporting the kettle body 1. A convex shaft tube 103 is respectively provided at both axial ends of the kettle body 1, two bearing seats are mounted on the support frame 9, and the convex shaft tube 103 is sleeved with bearings on the outside and then installed inside the bearing seats, thereby realizing the rotation connection between the kettle body 1 and the support frame 9.

[0037] The two ends of the axial direction of the kettle body 1 are respectively rotatably connected with a coaxially arranged feed pipe 6 and a discharge pipe 7, and the feed pipe 6 and the discharge pipe 7 are connected to the inner cavity of the kettle body 1. The feed pipe 6 and the discharge pipe 7 are both penetrated into the kettle body 1 through the through hole in the middle of the convex shaft tube 103.

[0038] In this embodiment, the feed pipe 6 includes a vertical pipe and a horizontal pipe. The horizontal pipe is coaxially arranged with the kettle body 1. A through hole is provided in the middle of the horizontal pipe. A plurality of feed holes 602 are arranged around the through hole.

[0039] One end of the feed hole 602 is connected to the inner cavity of the kettle body 1, and the other end is connected to the annular cavity 601, and the annular cavity 601 is connected to the vertical pipe.

[0040] A detergent pipe 8 is passed through the middle through hole of the horizontal pipe. The detergent pipe 8 is inserted into the kettle body 1. A spray hole 801 is provided on the detergent pipe 8 inside the kettle body 1. The outlet direction of the spray hole 801 is arranged upward.

[0041] The sprayed detergent cleans the inner wall of the kettle body 1. In order to improve the cleaning effect, the detergent pipe 8 is provided with two upwardly inclined spray holes 801 at the same axial position. The angle between the two spray holes 801 is 70-120°, and the two spray holes 801 are symmetrically arranged around the axis of the detergent pipe 8.

[0042] A stirring device 101 is provided on the inner wall of the kettle body 1 , and a driving device is provided on the support frame 9 . The driving device drives the kettle body 1 to rotate. When the kettle body 1 rotates, the stirring device 101 stirs the slurry inside the kettle body 1 .

[0043] A discharge chamber 102 is provided at one end of the kettle body 1 close to the discharge pipe 7 , and the stirring device 101 is located outside the discharge chamber 102 .

[0044] The discharge pipe 7 includes a vertical pipe and a horizontal pipe, the vertical pipe is located inside the discharge chamber 102, the vertical pipe inlet is arranged vertically downward, and the end of the horizontal pipe coaxially arranged with the kettle body 1 is passed through the outside of the kettle body 1. A liquid pump is connected in series to the horizontal pipe of the discharge pipe 7, or a liquid pump is added at the inlet of the vertical pipe.

[0045] The slurry is injected into the kettle body 1 through the feed pipe 6, and then the rotating kettle body 1 stirs the slurry through the stirring device 101. Since the kettle body 1 is arranged horizontally and the liquid level of the slurry injected into the kettle body 1 is lower than the axis of the kettle body 1, there will not be a large amount of slurry on the top of the inner wall of the kettle body 1, and only the slurry temporarily attached to the inner wall will be driven to the top.

[0046] The detergent is sprayed out through the spray hole 801 and directly sprayed on the top of the inner wall of the kettle body 1 to wash off the slurry temporarily attached to the inner wall. At the same time, after the detergent collides with the top of the inner wall of the kettle body 1, it will appear as a mist and fall on the slurry, thereby increasing the contact area with the slurry and optimizing the mixing effect of the two.

[0047] The driving device is a motor 4, a driven wheel 2 arranged coaxially is fixed to the outside of the kettle body 1, a driving wheel 3 is arranged on the output shaft of the motor 4, and the driving wheel 3 drives the driven wheel 2 to rotate. The driving wheel 3 drives the driven wheel 2 to rotate through a transmission device 5.

[0048] In this embodiment, the driving wheel 3 and the driven wheel 2 are both sprockets, and the transmission device 5 is a chain.

[0049] A plurality of stirring devices 101 are distributed in a circular array around the axis of the kettle body 1. The arrangement path of the stirring devices 101 can be a straight line or an arc. The cross-sectional shape of the stirring devices 101 along the radial direction of the kettle body 1 is an isosceles trapezoid.

[0050] The outside of the kettle body 1 is wrapped with an insulation layer 12. The detergent is sprayed into the kettle body 1 after being heated, or injected into the kettle body 1 after being mixed with steam to provide the heat source required for washing. After being insulated by the insulation layer 12, the entire washing kettle does not need to add an additional heat source.

[0051] In order to avoid slurry leakage during the washing process, an annular cap 11 is sleeved on the horizontal pipes of the feed pipe 6 and the discharge pipe 7. The annular cap 11 is located outside the convex shaft tube 103. An annular groove 10 is sleeved on the convex shaft tube 103. The annular cap 11 is inserted between the convex shaft tube 103 and the annular groove 10.

[0052] Taking the discharge end as an example, if the slurry wants to overflow, the flow path is the gap between the discharge pipe 7 and the convex shaft tube 103, and then it can move out through the U-shaped path between the annular sleeve cap 11 and the annular groove 10 and the outer wall of the convex shaft tube 103. The entire path is long and the gap is small, and there are also corners, so the resistance along the way is large, forming a labyrinth seal, which effectively prevents slurry leakage.

[0053] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A washing kettle for producing cellulose ether, characterized in that: The invention comprises a horizontally placed cylindrical kettle body (1) and a support frame (9) for supporting the kettle body (1). A stirring device (101) is provided on the inner wall of the kettle body (1). A driving device is provided on the support frame (9). The driving device drives the kettle body (1) to rotate. The two axial ends of the kettle body (1) are rotatably connected to a coaxially arranged feed pipe (6) and a discharge pipe (7), and the feed pipe (6) and the discharge pipe (7) are connected to the inner cavity of the kettle body (1).

2. A washing kettle for cellulose ether production according to claim 1, characterized in that: The driving device is a motor (4), a driven wheel (2) arranged coaxially is fixed outside the kettle body (1), a driving wheel (3) is arranged on the output shaft of the motor (4), and the driving wheel (3) drives the driven wheel (2) to rotate.

3. A washing kettle for cellulose ether production according to claim 2, characterized in that: The driving wheel (3) drives the driven wheel (2) to rotate through the transmission device (5).

4. The washing kettle for producing cellulose ether according to claim 1, characterized in that: A plurality of stirring devices (101) are distributed in a ring array around the axis of the kettle body (1).

5. A washing kettle for cellulose ether production according to claim 4, characterized in that: The cross-sectional shape of the stirring device (101) along the radial direction of the kettle body (1) is an isosceles trapezoid.

6. The washing kettle for producing cellulose ether according to claim 1, characterized in that: The feed pipe (6) comprises a vertical pipe and a horizontal pipe. The horizontal pipe is coaxially arranged with the kettle body (1). A through hole is provided in the middle of the horizontal pipe. A plurality of feed holes (602) are arranged around the through hole. One end of the feed hole (602) is connected to the inner cavity of the kettle body (1), and the other end is connected to the annular cavity (601), and the annular cavity (601) is connected to the vertical pipe. A detergent pipe (8) is passed through the middle through hole of the horizontal pipe, and the detergent pipe (8) is inserted into the interior of the kettle body (1). A spray hole (801) is provided on the detergent pipe (8) located inside the kettle body (1).

7. A washing kettle for producing cellulose ether according to claim 6, characterized in that: The outlet direction of the spray hole (801) is arranged upward.

8. The washing kettle for producing cellulose ether according to claim 6, characterized in that: The detergent pipe (8) is provided with two spray holes (801) inclined upward at the same axial position, the angle between the two spray holes (801) is 70-120 degrees, and the two spray holes (801) are symmetrically arranged around the axis of the detergent pipe (8).

9. The washing kettle for producing cellulose ether according to claim 1, characterized in that: The kettle body (1) is provided with a discharge cavity (102) at one end close to the discharge pipe (7), and the stirring device (101) is located outside the discharge cavity (102). The discharge pipe (7) comprises a vertical pipe and a horizontal pipe. The vertical pipe is located inside the discharge chamber (102). The inlet of the vertical pipe is arranged vertically downward, and the end of the horizontal pipe is passed through to the outside of the kettle body (1).

10. A washing kettle for producing cellulose ether according to any one of claims 1 to 9, characterized in that: The kettle body (1) is wrapped with a heat-insulating layer (12) on the outside.

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