Device for preventing clogging in cellulose ether desolventization production

Abstract

The utility model is suitable for cellulose ether production technical field provides a kind of cellulose ether desolventizing production prevents the device of material plugging, including cauldron body, cauldron body top is connected with condenser by pipeline.This cellulose ether desolventizing production prevents the device of material plugging, reactant is added into cauldron body, the heating device of reaction kettle is started, material is heated, makes it occur chemical reaction, with the progress of reaction, the solid particles produced gradually increase, these solid particles are intercepted by filter screen in the process of ascending, and liquid is discharged from cauldron body by filter screen, in the reaction process, starting rotation shaft drives cleaning roller and cleaning plate to rotate together, cleaning roller rolls at the bottom of filter screen, and the solid particles adhered to the bottom of filter screen are cleaned down, prevent filter screen from being blocked, and cleaning plate stirs and cleans the material in the middle of cauldron body inner chamber, avoid the material to adhere and cake on cauldron inner wall and conical block surface, guarantee the normal operation and reaction effect of reaction kettle, and improve production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of cellulose ether production technology, and in particular relates to a device for preventing material blockage in the desolventization production of cellulose ether. Background Technology

[0002] Cellulose ethers are high molecular polymers obtained by chemical modification of natural cellulose. They have excellent properties such as thickening, binding, emulsification, suspension, dispersion, film formation, stability and salt resistance, and are widely used in building materials, medicine, food, oil extraction, daily chemicals, ceramics, textiles, papermaking, agriculture and polymer polymerization.

[0003] In the existing cellulose ether desolventizing process, organic solvents (such as toluene-isopropanol mixed solvent) and water vapor are first cooled and recovered in a condenser. However, a small amount of cellulose ether powder will enter the condensation system with the steam for desolventizing. However, when the desolventizing kettle is heated and evaporated, a small amount of cellulose ether powder will enter the condenser with the organic solvent and water vapor, gradually accumulating and causing blockage of pipes or heat exchange tubes. Frequent shutdowns for cleaning are required, which reduces production efficiency. Utility Model Content

[0004] This invention provides a device to prevent material blockage in the desolventizing process of cellulose ethers. It aims to solve the problem that when the desolventizing kettle is heated and evaporated, a small amount of cellulose ether powder enters the condenser along with the organic solvent and water vapor, gradually accumulating and causing blockage of pipes or heat exchange tubes.

[0005] This invention is implemented as follows: a device for preventing material blockage in the production of cellulose ether desolventizing includes a vessel body, the top of which is connected to a condenser via a pipe. A filter screen for separating solids and liquids is installed at the top of the vessel body cavity. Two conical blocks are installed in the middle of the vessel body cavity. A rotating shaft is rotatably installed in the middle of the vessel body. A cleaning roller for cleaning the bottom of the filter screen is rotatably installed on the surface of the rotating shaft. Several cleaning plates for cleaning are fixedly connected to the surface of the rotating shaft.

[0006] Preferably, a motor is vertically mounted on the top of the vessel body, the output shaft of the motor is fixedly connected to the rotating shaft, and an inspection door is rotatably mounted on the front side of the vessel body.

[0007] Preferably, a first connecting sleeve is fixedly connected to the lower part of the surface of the rotating shaft, and a plurality of the cleaning plates are fixedly connected to the first connecting sleeve.

[0008] Preferably, a second connecting sleeve is fixedly connected to the upper part of the rotating shaft surface, a connecting rod is rotatably connected to the side of the second connecting sleeve, and the cleaning roller is fixedly connected to the surface of the connecting rod.

[0009] Preferably, the side wall of the vessel is provided with a rack along its circumferential direction, and one end of the connecting rod is fixedly connected to a gear that meshes with the rack.

[0010] Preferably, the filter screen sidewall is provided with a limiting block, and the limiting block and the top of the vessel body are provided with a threaded groove, which is threadedly connected to the threaded groove by an adjusting bolt.

[0011] Beneficial effects

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a device for preventing material blockage in the desolventizing production of cellulose ethers. The reactants are added to the reactor, and the heating device of the reactor is activated to heat the materials, causing a chemical reaction. As the reaction proceeds, the number of solid particles gradually increases. These solid particles are intercepted by the filter screen during their ascent, while the liquid flows out of the reactor through the filter screen. During the reaction, the rotating shaft drives the cleaning roller and cleaning plate to rotate together. The cleaning roller rolls at the bottom of the filter screen, cleaning off the solid particles attached to the bottom of the filter screen to prevent blockage. The cleaning plate stirs and cleans the materials in the middle of the reactor cavity, preventing the materials from adhering to and caking on the inner wall of the reactor and the surface of the conical block, ensuring the normal operation of the reactor and the reaction effect, and improving production efficiency. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0014] Figure 2 This is a front cross-sectional view of the structure of this utility model;

[0015] Figure 3 This is a top view of the structure of this utility model;

[0016] Figure 4 This is a partial enlarged structural diagram of section A in this utility model.

[0017] In the diagram: 1. Kettle body; 2. Motor; 3. Inspection door; 4. Condenser; 5. Conical block; 6. Rotating shaft; 7. First connecting sleeve; 8. Cleaning plate; 9. Second connecting sleeve; 10. Connecting rod; 11. Cleaning roller; 12. Gear; 13. Rack; 14. Filter screen; 15. Limiting block; 16. Adjusting bolt; 17. Threaded groove. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] Please see Figure 1-4This utility model provides a technical solution: a device for preventing material blockage in the desolventizing production of cellulose ethers, including a vessel body 1, the top of the vessel body 1 being connected to a condenser 4 via a pipe, a filter screen 14 for separating solids and liquids being provided at the top of the inner cavity of the vessel body 1, two conical blocks 5 being provided in the middle of the inner cavity of the vessel body 1, a rotating shaft 6 being rotatably provided in the middle of the vessel body 1, a cleaning roller 11 for cleaning the bottom of the surface filter screen 14 being rotatably provided on the surface of the rotating shaft 6, and a plurality of cleaning plates 8 being fixedly connected to the surface of the rotating shaft 6.

[0020] In this embodiment, the vessel 1 is the core container of the entire reaction. Its top is connected to the condenser 4 through a pipe. The condenser 4 is used to condense the steam escaping from the vessel 1, so that the steam is converted back into liquid and returned to the vessel 1 or collected, so as to realize the recycling or separation and collection of substances during the reaction process.

[0021] The vessel body 1 is equipped with a heating device, which is existing technology and will not be described in detail here.

[0022] The filter screen 14 can effectively intercept solid particles generated during the reaction, allowing the liquid to continue to participate in the reaction or flow out of the vessel 1 through the filter screen 14, thereby achieving preliminary solid-liquid separation.

[0023] The special shape design of the cone block 5 helps guide the flow direction of the reactants in the vessel 1, increases the mixing effect between materials, and improves the reaction efficiency. At the same time, the cone block 5 can also reduce the formation of dead corners in the middle of the vessel 1 cavity to a certain extent, and avoid material accumulation.

[0024] The cleaning roller 11 is in close contact with the bottom of the filter screen 14. Driven by the rotating shaft 6, the cleaning roller 11 can roll at the bottom of the filter screen 14 to clean off solid particles or other impurities attached to the bottom of the filter screen 14, prevent the filter screen 14 from clogging, and ensure the filtration effect of the filter screen 14.

[0025] The cleaning plate 8 can stir and clean the material in the middle of the inner cavity of the vessel 1, further promoting the mixing reaction of the material, while preventing the material from adhering and clumping on the inner wall of the vessel 1 and the surface of the conical block 5.

[0026] The reactants are added into the reactor body 1, and the heating device of the reactor is activated to heat the materials and induce a chemical reaction. As the reaction proceeds, the number of solid particles gradually increases. These solid particles are intercepted by the filter screen 14 as they rise, while the liquid flows out of the reactor body 1 through the filter screen 14. During the reaction, the rotating shaft 6 is activated to drive the cleaning roller 11 and the cleaning plate 8 to rotate together. The cleaning roller 11 rolls at the bottom of the filter screen 14 to remove the solid particles attached to the bottom of the filter screen 14, preventing the filter screen 14 from becoming clogged. The cleaning plate 8 stirs and cleans the materials in the middle of the inner cavity of the reactor body 1, preventing the materials from adhering to and clumping on the inner wall of the reactor body 1 and the surface of the conical block 5, thus ensuring the normal operation of the reactor and the reaction effect.

[0027] Furthermore, a motor 2 is vertically installed on the top of the vessel body 1, the output shaft of the motor 2 is fixedly connected to the rotating shaft 6, and an inspection door 3 is rotatably provided on the front side of the vessel body 1.

[0028] In this embodiment, after the motor 2 is started, its output shaft drives the rotating shaft 6 to rotate, and the rotating shaft 6 transmits power to the cleaning roller 11 and the cleaning plate 8, so that they start working.

[0029] The inspection door 3 must be fitted to the side wall of the vessel body 1, and the inspection door 3 is used to disassemble the filter screen 14.

[0030] Furthermore, a first connecting sleeve 7 is fixedly connected to the lower part of the surface of the rotating shaft 6, and several cleaning plates 8 are fixedly connected to the first connecting sleeve 7.

[0031] In this embodiment, after the motor 2 is started, its output shaft drives the rotating shaft 6 to rotate. The rotating shaft 6 transmits power to the first connecting sleeve 7, which in turn drives the cleaning plate 8 fixed on the first connecting sleeve 7. At the same time, the rotating shaft 6 also drives the cleaning roller 11 to rotate.

[0032] Furthermore, a second connecting sleeve 9 is fixedly connected to the upper part of the surface of the rotating shaft 6, and a connecting rod 10 is rotatably connected to the side of the second connecting sleeve 9. The cleaning roller 11 is fixedly connected to the surface of the connecting rod 10. A rack 13 is provided on the side wall of the vessel body 1 along its annular direction. A gear 12 that meshes with the rack 13 is fixedly connected to one end of the connecting rod 10.

[0033] In this embodiment, after the motor 2 starts, its output shaft drives the rotating shaft 6 to rotate, and the rotating shaft 6 transmits power to the first connecting sleeve 7 and the second connecting sleeve 9. The first connecting sleeve 7 drives the cleaning plate 8 to rotate, stirring and cleaning the material in the middle of the inner cavity of the vessel body 1. The second connecting sleeve 9 drives the connecting rod 10 and the cleaning roller 11 to revolve. At the same time, since the gear 12 at one end of the connecting rod 10 meshes with the rack 13 on the side wall of the vessel body 1, the gear 12 will roll along the rack 13 during the revolution, thereby driving the connecting rod 10 and the cleaning roller 11 to rotate, preventing the material from sticking to the surface of the cleaning roller 11.

[0034] Furthermore, the filter screen 14 is provided with a limiting block 15 on its side wall, and the limiting block 15 and the top of the vessel body 1 are provided with a threaded groove 17, which is threadedly connected to the threaded groove 17 by an adjusting bolt 16.

[0035] In this embodiment, when the filter screen 14 needs to be replaced, first open the inspection door 3, and then rotate the adjusting bolt 16 to disengage it from the threaded groove 17, so that the filter screen 14 can be disassembled. When installing a new filter screen 14, it is only necessary to repeat the operation to ensure that the filter screen 14 and the pipeline are in a sealed state.

[0036] The working principle and usage process of this utility model are as follows: After the utility model is installed, the reactants are added into the reactor body 1, and the heating device of the reactor is started to heat the materials and cause a chemical reaction. As the reaction proceeds, the number of solid particles gradually increases. These solid particles are intercepted by the filter screen 14 during their ascent, while the liquid flows out of the reactor body 1 through the filter screen 14. During the reaction, the rotating shaft 6 is started to drive the cleaning roller 11 and the cleaning plate 8 to rotate together. The cleaning roller 11 rolls at the bottom of the filter screen 14 to clean down the solid particles attached to the bottom of the filter screen 14, preventing the filter screen 14 from clogging. The cleaning plate 8 stirs and cleans the materials in the middle of the inner cavity of the reactor body 1, preventing the materials from adhering to the inner wall of the reactor body 1 and the surface of the conical block 5 and agglomerating, thus ensuring the normal operation of the reactor and the reaction effect.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for preventing material blockage in the desolventizing production of cellulose ethers, comprising a vessel body (1), characterized in that: The top of the vessel body (1) is connected to the condenser (4) through a pipe. A filter screen (14) for separating solid and liquid is provided at the top of the inner cavity of the vessel body (1). Two conical blocks (5) are provided in the middle of the inner cavity of the vessel body (1). A rotating shaft (6) is rotatably provided in the middle of the vessel body (1). A cleaning roller (11) for cleaning the bottom of the surface filter screen (14) is rotatably provided on the surface of the rotating shaft (6). Several cleaning plates (8) for cleaning are fixedly connected to the surface of the rotating shaft (6).

2. The apparatus for preventing material blockage in the desolventizing production of cellulose ethers as described in claim 1, characterized in that: A motor (2) is vertically installed on the top of the vessel body (1). The output shaft of the motor (2) is fixedly connected to the rotating shaft (6). A maintenance door (3) is rotatably provided on the front side of the vessel body (1).

3. The apparatus for preventing material blockage in the desolventizing production of cellulose ethers as described in claim 1, characterized in that: The lower part of the surface of the rotating shaft (6) is fixedly connected to the first connecting sleeve (7), and several cleaning plates (8) are fixedly connected to the first connecting sleeve (7).

4. The apparatus for preventing material blockage in the desolventizing production of cellulose ethers as described in claim 1, characterized in that: A second connecting sleeve (9) is fixedly connected to the upper part of the surface of the rotating shaft (6), and a connecting rod (10) is rotatably connected to the side of the second connecting sleeve (9). The cleaning roller (11) is fixedly connected to the surface of the connecting rod (10).

5. The apparatus for preventing material blockage in the desolventizing production of cellulose ethers as described in claim 4, characterized in that: The side wall of the vessel body (1) is provided with a rack (13) along its annular direction, and one end of the connecting rod (10) is fixedly connected to a gear (12) that meshes with the rack (13).

6. The apparatus for preventing material blockage in the desolventizing production of cellulose ethers as described in claim 1, characterized in that: The filter screen (14) has a limiting block (15) on its side wall. The limiting block (15) and the top of the vessel body (1) have a threaded groove (17). The limiting block (15) is threadedly connected to the threaded groove (17) by an adjusting bolt (16).

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