Cellulose ether alkalization reaction device

Abstract

The utility model discloses a cellulose ether alkalization reaction device and relates to the technical field of cellulose ether production. Wherein the tank body and the tank cover are included, the tank cover is arranged at the top end of the tank body, an upper flange is arranged at the bottom end of the tank cover, a lower flange is arranged at the top end of the tank body, the tank body and the tank cover are connected through the upper flange and the lower flange, and the upper flange and the lower flange are fixedly connected through bolts; the thermal insulation plates are arranged on the outer walls of the tank body and the tank cover, the gaps are reserved between the thermal insulation plates and the tank body, and the heating port and the flange are arranged, so that heating can be performed through the external heating port, the reaction temperature is effectively controlled, the energy consumption is reduced, and the energy efficiency is improved; through the bolt fixation of the upper flange and the lower flange and the arrangement of the sealing gasket, good sealing between the tank body and the tank cover is ensured, the design prevents possible gas or liquid leakage in the reaction process, and the safety and stability of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cellulose ether production, in particular to a cellulose ether alkalization reaction device. Background Art

[0002] The production process of cellulose ether mainly includes (1) alkalization: caustic soda flakes are dissolved in water at a temperature of about 75°C; (2) alkalization: refined cotton and alkali solution undergo an alkalization reaction in an organic solvent to generate alkalized cellulose at a temperature of about 28-35°C; (3) etherification: alkalized cellulose reacts with an etherifying agent to generate cellulose ether at a temperature of about 50-100°C in stages; (4) neutralization: the remaining alkali in the system is neutralized with acid; (5) desolventization: the neutralized system is heated and the solvent in the system is recovered by condensation; (6) post-treatment: the desolventized mixture is centrifuged and dried to obtain the final product.

[0003] The existing reactor cannot maintain a stable reaction temperature, which affects the reaction efficiency. Therefore, it is necessary to set up a cellulose ether alkalization reaction device that can solve the above problem. Utility Model Content

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a cellulose ether alkalization reaction device, which includes a tank body and a tank cover, the tank cover is arranged at the top end of the tank body, the bottom end of the tank cover is provided with an upper flange, the top end of the tank body is provided with a lower flange, the tank body and the tank cover are connected by the upper flange and the lower flange, and the upper flange and the lower flange are fixedly connected by bolts; a sealing gasket is also arranged between the upper flange and the lower flange, a stirring assembly is arranged inside the tank body, insulation plates are arranged on the outer walls of the tank body and the tank cover, a gap is arranged between the tank body and the insulation plate, a heating port is arranged on the outer side of the insulation plate, a flange is arranged on the outer side of the heating port, a discharge port is arranged at the bottom end of the tank body, a tank bottom flange is arranged at the position of the discharge port, a discharge cone pipe is arranged at the bottom end of the tank bottom flange, and an ultra-short ball valve is arranged at the bottom end of the discharge cone pipe.

[0005] Preferably, the stirring assembly includes a motor seat, a motor reducer, a stirring shaft and a stirring paddle. The motor seat is arranged at the center position of the top of the tank cover, the motor reducer is arranged at the top of the motor seat, the motor seat is a hollow structure, and the output end of the motor reducer is arranged with a stirring shaft. The stirring shaft passes through the motor seat and the top of the tank cover in sequence and extends to the lower end of the tank body. A stirring paddle is arranged on the stirring shaft inside the tank body.

[0006] Preferably, the stirring paddle is a folding blade stirring paddle.

[0007] Preferably, a feeding port is provided at the bottom end of the tank body, the feeding port is connected to the tank body, and a flange is provided on the outer side of the feeding port.

[0008] Preferably, a plurality of connecting pipes are provided at the top end of the tank cover, and a flange is provided at the top end of the connecting pipes.

[0009] Preferably, a pressure gauge joint is provided at the top end of the tank cover, a pressure gauge is provided at the position of the pressure gauge joint, and a probe of the pressure gauge extends to the interior of the tank cover.

[0010] Preferably, a temperature measuring interface is provided at the bottom end of the tank body, and a thermometer is provided at the position of the temperature measuring interface.

[0011] Beneficial effects: Compared with the prior art, the utility model is provided with an insulation plate on the outer wall of the tank body and the tank cover, and a gap is left between the insulation plate and the tank body. The arrangement of the heating port and the flange allows heating through the external heating port, effectively controlling the reaction temperature, reducing energy consumption and improving energy efficiency; the bolt fixation of the upper flange and the lower flange and the arrangement of the sealing gasket ensure a good seal between the tank body and the tank cover. This design prevents possible gas or liquid leakage during the reaction process and improves the safety and stability of the device; the stirring assembly includes a motor seat, a motor reducer, a stirring shaft and a folding blade stirring paddle. The motor reducer drives the folding blade stirring paddle in the tank body through the stirring shaft Stirring is carried out inside to ensure that the reaction materials can be evenly mixed, thereby improving the reaction efficiency and product quality; a plurality of connecting pipes and pressure gauge joints are arranged on the top of the tank cover to facilitate the operator to monitor the pressure, and the temperature measuring interface and the thermometer can timely and accurately monitor the reaction temperature to ensure that the reaction is carried out within the appropriate temperature range; a discharge port and a feeding port are arranged at the bottom of the tank body, and the discharge is controlled by the tank bottom flange and the ultra-short ball valve, thereby ensuring the safe discharge of the reaction products and the safe addition of the raw materials, simplifying the operation process, and improving the safety and operational reliability; by optimizing the sealing, thermal insulation control and stirring effect, the device can operate more efficiently, stably and safely. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a three-dimensional structural schematic diagram of a cellulose ether alkalization reaction device.

[0013] Figure 2 It is a front view structural schematic diagram of a cellulose ether alkalization reaction device of the utility model.

[0014] Figure 3 The utility model is a schematic diagram of the AA cross-sectional structure of a cellulose ether alkalization reaction device.

[0015] Figure 4 The utility model is a schematic diagram of the top view of the structure of a cellulose ether alkalization reaction device.

[0016] In the attached figure: 1-pressure gauge, 2-insulation board, 3-connecting pipe, 4-tank cover, 5-upper flange, 6-lower flange, 7-tank body, 8-motor reducer, 9-motor seat, 10-stirring shaft, 11-sealing gasket, 12-stirring paddle, 13-tank bottom flange, 14-discharging cone, 15-ultra-short ball valve, 16-thermometer, 17-temperature measuring interface, 18-heating port, 19-feeding port, 20-pressure gauge connector. DETAILED DESCRIPTION

[0017] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0018] Example

[0019] Please refer to the drawings of the specification. In the embodiment of the utility model, a cellulose ether alkalization reaction device is provided, which includes a tank body 7 and a tank cover 4. The tank cover 4 is arranged at the top of the tank body 7. The bottom end of the tank cover 4 is provided with an upper flange 5. The top of the tank body 7 is provided with a lower flange 6. The tank body 7 and the tank cover 4 are connected through the upper flange 5 and the lower flange 6. The upper flange 5 and the lower flange 6 are fixedly connected by bolts; a sealing gasket 11 is also provided between the upper flange 5 and the lower flange 6. A stirring assembly is provided inside the tank body 7. The tank body 7 and the tank cover 4 are connected through the upper flange 5 and the lower flange 6. An insulation plate 2 is provided on the outer wall of the cover 4, a gap is provided between the tank body 7 and the insulation plate 2, a heating port 18 is provided on the outer side of the insulation plate 2, a flange is provided on the outer side of the heating port 18, a discharge port is provided at the bottom end of the tank body 7, a tank bottom flange 13 is provided at the position of the discharge port, a discharge cone 14 is provided at the bottom end of the tank bottom flange 13, an ultra-short ball valve 15 is provided at the bottom end of the discharge cone 14, a discharge port is provided at the bottom end of the tank body, and the discharge is controlled by the tank bottom flange and the ultra-short ball valve to ensure the safe discharge of the reaction product.

[0020] The stirring assembly includes a motor seat 9, a motor reducer 8, a stirring shaft 10 and a stirring paddle 12. The motor seat 9 is arranged at the center position of the top of the tank cover 4. The motor reducer 8 is arranged at the top of the motor seat 9. The motor seat 9 is a hollow structure. The output end of the motor reducer 8 is provided with a stirring shaft 10. The stirring shaft 10 passes through the motor seat 9 and the top of the tank cover 4 in sequence and extends to the lower end of the tank body 7. The stirring paddle 12 is arranged on the stirring shaft 10 inside the tank body 7. The stirring paddle 12 is a folding blade stirring paddle.

[0021] A feeding port 19 is disposed at the bottom end of the tank body 7 . The feeding port 19 is connected to the tank body 7 , and a flange is disposed on the outer side of the feeding port 19 .

[0022] A plurality of connecting pipes 3 are disposed at the top of the tank cover 4 , and a flange is disposed at the top of the connecting pipe 3 .

[0023] A pressure gauge joint 20 is disposed at the top of the tank cover 4 , and a pressure gauge 1 is disposed at the position of the pressure gauge joint 20 . The probe of the pressure gauge 1 extends to the inside of the tank cover 4 .

[0024] A temperature measuring interface 17 is disposed at the bottom end of the tank body 7 , and a thermometer 16 is disposed at the position of the temperature measuring interface 17 .

[0025] Working principle: First, the raw materials are added and fully mixed in the device through the stirring system to ensure that the alkaline catalyst is evenly dispersed in the cellulose. The rotation of the stirring paddle ensures the uniformity of the reaction materials to avoid excessive or low local concentrations. The external heating source inputs heat energy into the device through the heating port to increase the temperature of the reaction system to an appropriate reaction temperature. During the reaction, the temperature, pressure and other key parameters of the reaction are monitored in real time through monitoring devices such as thermometers and pressure gauges installed in the device.

[0026] In summary, the utility model ensures the uniformity and stability of the product during the reaction process through uniform stirring and temperature control. The thermal insulation structure and external heating port in the design improve energy utilization efficiency and reduce energy consumption, which not only reduces production costs but also helps to reduce the impact on the environment.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, the meaning of "multiple" is two or more.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

Claims

1. A cellulose ether alkalization reaction device, characterized in that: The tank body (7) comprises a tank cover (4), wherein the tank cover (4) is arranged at the top end of the tank body (7), an upper flange (5) is arranged at the bottom end of the tank cover (4), and a lower flange (6) is arranged at the top end of the tank body (7). The tank body (7) and the tank cover (4) are connected via the upper flange (5) and the lower flange (6), and the upper flange (5) and the lower flange (6) are fixedly connected via bolts. A sealing gasket (11) is also arranged between the upper flange (5) and the lower flange (6), and a stirring assembly is arranged inside the tank body (7). The outer walls of the tank body (7) and the tank cover (4) are both provided with a heat preservation plate (2), a gap is provided between the tank body (7) and the heat preservation plate (2), a heating port (18) is provided on the outer side of the heat preservation plate (2), a flange is provided on the outer side of the heating port (18), a discharge port is provided at the bottom end of the tank body (7), a tank bottom flange (13) is provided at the position of the discharge port, a discharge cone tube (14) is provided at the bottom end of the tank bottom flange (13), and an ultra-short ball valve (15) is provided at the bottom end of the discharge cone tube (14).

2. A cellulose ether alkalization reaction device according to claim 1, characterized in that: The stirring assembly comprises a motor seat (9), a motor reducer (8), a stirring shaft (10) and a stirring paddle (12); the motor seat (9) is arranged at the center position of the top end of the tank cover (4); the motor reducer (8) is arranged at the top end of the motor seat (9); the motor seat (9) is a hollow structure; the output end of the motor reducer (8) is arranged with a stirring shaft (10); the stirring shaft (10) passes through the motor seat (9) and the top end of the tank cover (4) in sequence and extends to the lower end of the tank body (7); and the stirring paddle (12) is arranged on the stirring shaft (10) inside the tank body (7).

3. A cellulose ether alkalization reaction device according to claim 2, characterized in that: The stirring paddle (12) is a folding blade stirring paddle.

4. A cellulose ether alkalization reaction device according to claim 1, characterized in that: A feeding port (19) is provided at the bottom end of the tank body (7), the feeding port (19) is connected to the tank body (7), and a flange is provided on the outer side of the feeding port (19).

5. A cellulose ether alkalization reaction device according to claim 1, characterized in that: A plurality of connecting pipes (3) are arranged at the top end of the tank cover (4), and a flange is arranged at the top end of the connecting pipe (3).

6. A cellulose ether alkalization reaction device according to claim 1, characterized in that: A pressure gauge joint (20) is provided at the top end of the tank cover (4), a pressure gauge (1) is provided at the position of the pressure gauge joint (20), and a probe of the pressure gauge (1) extends into the interior of the tank cover (4).

7. A cellulose ether alkalization reaction device according to claim 1, characterized in that: A temperature measuring interface (17) is provided at the bottom end of the tank body (7), and a thermometer (16) is provided at the position of the temperature measuring interface (17).

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