Crosslinking equipment for cellulose ether production
The cross-linking device improves cellulose ether production by dispersing it in water and using gas stirring with controlled temperature air injection, addressing mixing inefficiencies and enhancing product yield.
Patent Information
- Application Number
- CN202420927408.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing cellulose ether cross-linking processes have limited mixing efficiency and low product yield due to incomplete mixing of cellulose ether with cross-linking agents, particularly in dry treatment methods.
A cross-linking device that employs a water-soluble method to disperse cellulose ether, followed by mixing with a cross-linking agent in water, utilizing gas stirring and controlled temperature air injection for uniform mixing and drying, with integrated exhaust and recovery systems.
Enhances mixing efficiency and achieves simultaneous drying, resulting in higher product yield and improved application performance of cellulose ether.
Smart Images
Figure CN222240260U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of cellulose ether production, and specifically relates to a cross-linking device for cellulose ether production. Background Art
[0002] The cross-linking process of cellulose ether is a process in which the hydroxyl groups in cellulose ether react chemically with cross-linking agents (such as formaldehyde, epoxy compounds, etc.) to form a three-dimensional network structure. This cross-linking can increase the stability, wear resistance and water resistance of cellulose ether and improve its application performance in various industrial fields.
[0003] In order to improve the mixing effect of cellulose ether and crosslinking agent, some specific methods are usually used to break up the cellulose ether in the crosslinking process of cellulose ether so that it can fully react with the crosslinking agent during the crosslinking process. Common breaking up methods include:
[0004] 1. Water-soluble method: Add cellulose ether into an appropriate amount of water and stir or heat it sufficiently to disperse it in the water.
[0005] 2. Solvent method: dissolve cellulose ether in some specific solvents, and then disperse it evenly by stirring or ultrasonic means.
[0006] 3. Dry treatment: For some cellulose ethers with good solubility, dry treatment can also be used to break them up by mechanical shearing or air flow crushing.
[0007] At present, the cross-linking process of cellulose ether of some manufacturers is that after the cellulose ether is finished, it enters a special kneading machine to spray and stir the liquid for cross-linking, and then enters a rotary flash dryer for drying after discharging to produce a cross-linked finished product. That is, the cellulose ether is broken up by dry treatment. For example, the Chinese patent announcement number CN217887982U issued on November 25, 2022 is a cellulose ether cross-linking device, including a conveying auger. A processing structure is provided in the conveying auger, and the processing structure includes: a feeding pipe, a spraying part, a side cavity, a motor, a stirring frame and a drying part. The feeding pipe is arranged on the conveying auger, the spraying part is arranged on the conveying auger, the side cavity is opened at one end of the conveying auger, the motor is fixed on the upper end of the conveying auger, the stirring frame is arranged at the output end of the motor and is located in the side cavity, and the drying part is arranged at the bottom of the conveying auger.
[0008] The above patent is equivalent to breaking up in the conveying auger and mixing with the cross-linking agent while breaking up, but the cross-linking agent is still only mixed with the cellulose ether that it contacts first, so the mixing efficiency is still limited and the product yield of the drying section is not high. Utility Model Content
[0009] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a cross-linking device for producing cellulose ether. The utility model disperses the cellulose ether by a water-soluble method and then mixes it with a cross-linking agent. Both can diffuse in water, so the mixing efficiency is higher.
[0010] The technical solution adopted by the utility model to solve the problems existing in the prior art is:
[0011] A cross-linking device for producing cellulose ether comprises a kettle body, a discharging device with a valve is arranged below the kettle body, a feeding pipe and a cross-linking agent adding pipe are arranged on the top of the kettle body, and a stirring device is coaxially arranged inside the kettle body.
[0012] Preferably, the stirring device comprises an intermediate tube, the bottom of the intermediate tube is connected with a plurality of bottom exhaust pipes, the bottom exhaust pipes are provided with exhaust holes, and the upper part of the intermediate tube is passed through to the outside of the kettle body.
[0013] Preferably, the exhaust holes are arranged vertically downward.
[0014] Preferably, the top of the intermediate tube is connected to the outlet of the three-way valve, and the two inlets of the three-way valve are connected to the normal temperature air pipe and the high temperature air pipe respectively.
[0015] Preferably, the intermediate tube is connected with several layers of middle air pipes, the middle air pipes are provided with exhaust ports, and the exhaust ports are provided with temperature control switches.
[0016] Preferably, the exhaust port is located at the axial end of the middle air pipe, and the inner diameter of the exhaust port is smaller than the inner diameter of the middle air pipe.
[0017] The temperature control switch is a temperature bag, the outer diameter of which is smaller than the inner diameter of the middle air pipe, the outer wall of which is fixedly connected to the middle air pipe via a support rod, and a first blocking plate arranged toward the exhaust port is fixed at the end of the movable part of the temperature bag, the diameter of which is larger than the inner diameter of the exhaust port and smaller than the inner diameter of the middle air pipe.
[0018] Preferably, a waste gas recovery pipe is connected through the top of the kettle body.
[0019] Preferably, the discharge device comprises a vertical pipe and a horizontal pipe which are interconnected, and the vertical pipe is interconnected with the bottom of the kettle body.
[0020] A second blocking plate is slidably arranged inside the vertical tube, a telescopic rod is fixed at the bottom of the second blocking plate, and the end of the telescopic rod is passed through the outside of the bottom of the vertical tube and connected to the telescopic cylinder.
[0021] Preferably, the vertical tube is coaxially arranged with the kettle body.
[0022] Compared with the prior art, the utility model has the following beneficial effects:
[0023] (1) After the cellulose ether is broken up by a water-soluble method, it is mixed with a cross-linking agent. Both can diffuse in water, so the mixing efficiency is higher.
[0024] (2) Stirring is performed by gas stirring. The shock wave generated by the explosion of bubbles in the water makes the stirring more uniform. At the same time, after replacing it with high-temperature air, it can directly achieve a drying effect, killing two birds with one stone. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0026] Figure 1 This is a structural diagram of a cross-linking device for producing cellulose ether according to the utility model.
[0027] Figure 2 for Figure 1 A cross-sectional view of
[0028] Figure 3 for Figure 2 A partial enlarged view of the middle A.
[0029] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.
[0030] Figure 5 The utility model is a structural diagram of a stirring device in a cross-linking device for producing cellulose ether.
[0031] In the figure: 1-kettle body, 2-discharging device, 201-vertical pipe, 202-horizontal pipe, 3-middle pipe, 4-bottom exhaust pipe, 401-exhaust hole, 5-middle air pipe, 501-exhaust port, 6-temperature bag, 601-first blocking plate, 7-feeding pipe, 8-cross-linking agent addition pipe, 9-waste gas recovery pipe, 10-second blocking plate, 11-telescopic rod, 12-telescopic cylinder, 13-three-way valve, 14-normal temperature air pipe, 15-high temperature air pipe. DETAILED DESCRIPTION
[0032] 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.
[0033] 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.
[0034] The following is a further detailed description of a cross-linking device for producing cellulose ether according to the utility model in conjunction with the accompanying drawings.
[0035] A cross-linking device for producing cellulose ether comprises a kettle 1, a discharge device 2 with a valve is arranged below the kettle 1, a feed pipe 7 and a cross-linking agent addition pipe 8 are arranged on the top of the kettle 1, and a stirring device is coaxially arranged inside the kettle 1.
[0036] The bottom of the kettle body 1 is arc-shaped for easy feeding, and the discharge device 2 is connected to the lowest point of the bottom center of the kettle body 1. The feed pipe 7 is used to add cellulose ether, and the cross-linking agent adding pipe 8 is used to add the cross-linking agent and water. The cross-linking agent and water can be added through two separate pipelines, and the two pipelines are connected to the cross-linking agent adding pipe 8 through a three-way valve.
[0037] During the cross-linking reaction, cellulose ether is added first, and then water is added. The two are stirred by a stirring device to dissolve the cellulose ether in water. After the cellulose ether is completely dissolved, a cross-linking agent is added and stirred to mix evenly to produce a cross-linking reaction.
[0038] In this embodiment, the stirring device includes an intermediate tube 3, and a plurality of bottom exhaust pipes 4 are connected to the bottom of the intermediate tube 3, and exhaust holes 401 are provided on the bottom exhaust pipes 4. The upper part of the intermediate tube 3 is penetrated to the outside of the kettle body 1. The exhaust holes 401 are arranged vertically downward. Clean air or other inert gas ejected through the exhaust holes 401 stirs the mixed liquid inside the kettle body 1.
[0039] After the cross-linking reaction, drying is required to separate the cellulose ether from the water. Therefore, the top of the intermediate tube 3 is connected to the outlet of the three-way valve 13, and the two inlets of the three-way valve 13 are respectively connected to the normal temperature air pipe 14 and the high temperature air pipe 15. The intermediate tube 3 is connected to a plurality of layers of middle air pipes 5, and the middle air pipes 5 are provided with an exhaust port 501, and the exhaust port 501 is provided with a temperature control switch.
[0040] In this way, during the stirring process, normal temperature gas is injected, the temperature control switch is turned on, and the exhaust port 501 can also spray gas, so that there are multiple layers of exhaust inside the kettle body 1, optimizing the stirring effect. During the drying process, high temperature gas flows in, the temperature control switch blocks the exhaust port 501, and the high temperature gas is only discharged from the exhaust hole 401 at the bottom. In this way, the discharged high temperature gas is always in contact with the mixture inside the kettle body 1, and there will be no emptying phenomenon.
[0041] The exhaust port 501 is located at the axial end of the middle air pipe 5 , and the inner diameter of the exhaust port 501 is smaller than the inner diameter of the middle air pipe 5 .
[0042] The temperature control switch is a temperature bulb 6, which is a prior art. The outer diameter of the temperature bulb 6 is smaller than the inner diameter of the middle air pipe 5, and the outer wall of the temperature bulb 6 is fixedly connected to the middle air pipe 5 through a support rod. A first blocking plate 601 arranged toward the exhaust port 501 is fixed at the end of the movable part of the temperature bulb 6, and the diameter of the first blocking plate 601 is larger than the inner diameter of the exhaust port 501 and smaller than the inner diameter of the middle air pipe 5.
[0043] The top of the kettle body 1 is connected with an exhaust gas recovery pipe 9, and the exhaust gas recovery pipe 9 is connected to the exhaust gas recovery and treatment system of the factory.
[0044] The discharge device 2 comprises a vertical pipe 201 and a horizontal pipe 202 which are connected to each other, and the vertical pipe 201 is connected to the bottom of the kettle body 1 .
[0045] A second blocking plate 10 is slidably disposed inside the vertical tube 201, a telescopic rod 11 is fixed to the bottom of the second blocking plate 10, and the end of the telescopic rod 11 is passed through the outside of the bottom of the vertical tube 201 and connected to the telescopic cylinder 12. The vertical tube 201 is coaxially arranged with the kettle body 1.
[0046] The telescopic cylinder 12 adopts an electric cylinder or a gas cylinder, which is the prior art. In a sealed state, the top surface of the second blocking plate 10 is flush with the bottom surface of the kettle body 1.
[0047] 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 cross-linking device for producing cellulose ether, characterized in that: The kettle body (1) comprises a discharge device (2) with a valve provided below the kettle body (1), and a feed pipe (7) and a cross-linking agent addition pipe (8) provided on the top of the kettle body (1). A stirring device is coaxially arranged inside the kettle body (1).
2. A cross-linking device for producing cellulose ether according to claim 1, characterized in that: The stirring device comprises an intermediate tube (3), the bottom of the intermediate tube (3) is connected with a plurality of bottom exhaust pipes (4), and the bottom exhaust pipes (4) are provided with exhaust holes (401). The intermediate tube (3) is passed through the upper part to the outside of the kettle body (1).
3. A cross-linking device for producing cellulose ether according to claim 2, characterized in that: The exhaust holes (401) are arranged vertically downward.
4. A cross-linking device for producing cellulose ether according to claim 2, characterized in that: The top of the intermediate tube (3) is connected to the outlet of the three-way valve (13), and the two inlets of the three-way valve (13) are connected to the normal temperature air pipe (14) and the high temperature air pipe (15) respectively.
5. A cross-linking device for producing cellulose ether according to claim 4, characterized in that: The intermediate tube (3) is connected with a plurality of layers of middle air pipes (5), the middle air pipe (5) is provided with an exhaust port (501), and a temperature control switch is provided at the exhaust port (501).
6. A cross-linking device for producing cellulose ether according to claim 5, characterized in that: The exhaust port (501) is located at the axial end of the middle air pipe (5), and the inner diameter of the exhaust port (501) is smaller than the inner diameter of the middle air pipe (5). The temperature control switch is a temperature bag (6), the outer diameter of the temperature bag (6) is smaller than the inner diameter of the middle air pipe (5), the outer wall of the temperature bag (6) is fixedly connected to the middle air pipe (5) through a support rod, and a first blocking plate (601) arranged toward the exhaust port (501) is fixed at the end of the movable part of the temperature bag (6), and the diameter of the first blocking plate (601) is larger than the inner diameter of the exhaust port (501) and smaller than the inner diameter of the middle air pipe (5).
7. A cross-linking device for producing cellulose ether according to any one of claims 2 to 6, characterized in that: The top of the kettle body (1) is connected through a waste gas recovery pipe (9).
8. A cross-linking device for producing cellulose ether according to any one of claims 1 to 6, characterized in that: The discharge device (2) comprises a vertical pipe (201) and a horizontal pipe (202) which are connected to each other, and the vertical pipe (201) is connected to the bottom of the kettle body (1). A second blocking plate (10) is slidably disposed inside the vertical tube (201), a telescopic rod (11) is fixed at the bottom of the second blocking plate (10), and the end of the telescopic rod (11) is passed through the outside of the bottom of the vertical tube (201) and is connected to the telescopic cylinder (12).
9. A cross-linking device for producing cellulose ether according to claim 8, characterized in that: The vertical tube (201) is coaxially arranged with the kettle body (1).