Reactor heat exchange device for preparing cellulose ether

Abstract

The utility model provides a reactor heat exchange device for cellulose ether preparation, and relates to the technical field of cellulose ether preparation. A reactor heat exchange device for cellulose ether preparation comprises a reaction kettle, a heat exchange jacket is fixedly connected to the outer surface of the reaction kettle, a liftable inner heat exchange pipe is arranged in the reaction kettle, and the heat exchange jacket and the inner heat exchange pipe are communicated through a communication mechanism. The top of the reaction kettle is provided with a lifting mechanism for adjusting the lifting of the inner heat exchange pipe in the reaction kettle, and the heat exchange jacket is fixedly connected with a heating medium inlet pipe and a heating medium outlet pipe. According to the device, a heating medium is injected into the heat exchange jacket through the heating medium inlet pipe, the heating medium flows into the inner heat exchange pipe through the communicating mechanism, the heat exchange effect on raw materials in the reaction kettle is improved, the inner heat exchange pipe is driven to ascend and descend in the reaction kettle under the action of the lifting mechanism, and the heat exchange efficiency is improved. And heat exchange can be carried out on various height positions in the reaction kettle.

Description

Technical Field

[0001] This utility model relates to a heat exchange device, specifically a reactor heat exchange device for cellulose ether preparation, belonging to the field of cellulose ether preparation technology. Background Technology

[0002] Cellulose ethers It is a polymer compound with an ether structure made from cellulose. Each glucose ring in the cellulose macromolecule contains three hydroxyl groups: a primary hydroxyl group on the sixth carbon atom and secondary hydroxyl groups on the second and third carbon atoms. The hydrogen in the hydroxyl groups is replaced by hydrocarbon groups to form... Cellulose ethers The derivatives are etherification processes in which alkalized cellulose reacts with an etherifying agent to form cellulose ether, and the etherification temperature is around 50-100°C.

[0003] Chinese Patent Publication No. CN217663294U discloses a cellulose ether production apparatus, which includes a reactor with a jacket on the outer wall of the reactor, the jacket having an inlet and an outlet for a heat transfer medium; a stirring device on the reactor; a feed pipe connected to the top of the reactor; a sprayer in the upper part of the reactor; a temperature sensor fixedly installed on the inner wall of the reactor; and a discharge pipe connected to the bottom of the reactor.

[0004] However, the inventor of the above-mentioned device believes that it has certain defects. The device exchanges heat by injecting heat medium into the jacket, which is not good at heat exchange at the center of the reactor, thus affecting the etherification effect of the material at the center of the reactor. Therefore, this utility model provides a reactor heat exchange device for the preparation of cellulose ether. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a reactor heat exchange device for the preparation of cellulose ethers in order to solve the above-mentioned problems, thereby addressing the issue of poor heat exchange effect at the center of the reactor in the prior art, which affects the etherification effect of the material at the center of the reactor.

[0007] (II) Technical Solution

[0008] This utility model is achieved through the following technical solution: a reactor heat exchange device for the preparation of cellulose ethers, including a reactor, a heat exchange jacket fixedly connected to the outer surface of the reactor, an internal heat exchange tube that can be raised and lowered inside the reactor, the heat exchange jacket and the internal heat exchange tube being connected by a communication mechanism, a lifting mechanism for adjusting the raising and lowering of the internal heat exchange tube inside the reactor being provided at the top of the reactor, and a heat medium inlet pipe and a heat medium outlet pipe fixedly connected to the heat exchange jacket.

[0009] Preferably, the communication mechanism includes a connecting bottom pipe fixed to the bottom of the inner heat exchange tube and connected to the inner heat exchange tube, a connecting sleeve fixedly connected to the inner bottom wall of the reactor, the connecting sleeve being connected to the heat exchange jacket through a connecting pipe, and one end of the connecting bottom pipe extending into the interior of the connecting sleeve. The heat exchange jacket is connected to the interior of the inner heat exchange tube through the action of the connecting sleeve and the connecting bottom pipe.

[0010] Preferably, a connecting plate is fixedly connected to the bottom of the connecting base tube, and a sealing ring is fixedly connected to the outer surface of the connecting plate. The sealing ring is located between the connecting plate and the inner wall of the connecting sleeve, thereby improving the sealing performance between the connecting plate and the connecting sleeve.

[0011] Preferably, the lifting mechanism includes a threaded sleeve that rotates on the top of the reactor, and an adjusting screw is fixedly connected to the top of the inner heat exchange tube. The adjusting screw is threaded inside the threaded sleeve, and the inner heat exchange tube is raised or lowered by rotating the threaded sleeve under the action of the adjusting screw.

[0012] Preferably, a drive motor is fixedly connected to the top of the reactor, a first gear is fixedly connected to the output end of the drive motor, and a second gear is fixedly connected to the outer surface of the threaded sleeve. The first gear and the second gear mesh with each other. By starting the drive motor, the threaded sleeve is driven to rotate under the action of the first gear and the second gear.

[0013] Preferably, the internal heat exchange tube is spiral-shaped, and a temperature sensor is fixedly connected to the inner wall of the reactor to monitor the temperature inside the reactor in real time.

[0014] Preferably, the top of the reactor is fixedly connected to a feeding pipe, and the bottom of the reactor is fixedly connected to a discharging pipe, so that the contents of the reactor can be fed and discharged through the feeding pipe and the discharging pipe.

[0015] This invention provides a reactor heat exchange device for the preparation of cellulose ethers, which has the following beneficial effects:

[0016] The device injects heat medium into the heat exchange jacket through a heat medium inlet pipe. The heat medium flows into the interior of the inner heat exchange tube through a connecting mechanism, which improves the heat exchange effect on the raw materials inside the reactor. Furthermore, the lifting mechanism drives the inner heat exchange tube to move up and down inside the reactor, enabling heat exchange at various heights inside the reactor.

[0017] The device, through the action of the connecting sleeve, connecting bottom pipe, connecting plate and sealing ring, ensures that the inner heat exchange tube remains in communication with the inside of the heat exchange jacket during the lifting and lowering process, so that the heat medium can flow into the inside of the inner heat exchange tube. In addition, the inner heat exchange tube is spiral-shaped, which increases the contact area with the material. Attached Figure Description

[0018] Figure 1 This is a perspective view of the entire utility model;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model;

[0020] Figure 3 This is a three-dimensional view of the internal heat exchanger tube structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the connecting sleeve structure of this utility model.

[0022] [Explanation of Key Component Symbols]

[0023] 1. Reactor; 11. Feeding pipe; 12. Discharge pipe; 2. Heat exchange jacket; 21. Heat medium inlet pipe; 22. Heat medium outlet pipe; 3. Inner heat exchange tube; 31. Connecting bottom pipe; 32. Connecting plate; 33. Sealing ring; 4. Connecting sleeve; 5. Temperature sensor; 6. Adjusting screw; 7. Threaded sleeve; 8. Drive motor. Detailed Implementation

[0024] This invention provides a reactor heat exchange device for the preparation of cellulose ethers.

[0025] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 A heat exchange device for a reactor used in the preparation of cellulose ethers includes a reactor 1. A heat exchange jacket 2 is fixedly connected to the outer surface of the reactor 1. An internal heat exchange tube 3 that can be raised and lowered is provided inside the reactor 1. A heat medium enters the heat exchange jacket 2 and the internal heat exchange tube 3 to exchange heat between the inner wall of the reactor 1 and the raw materials inside the reactor 1. The internal heat exchange tube 3 is spiral-shaped, which increases the contact area with the material. A temperature sensor 5 is fixedly connected to the inner wall of the reactor 1 to monitor the temperature inside the reactor 1 in real time.

[0026] Please refer to it again. Figure 2 , Figure 3 and Figure 4 The heat exchange jacket 2 and the inner heat exchange tube 3 are connected by a communication mechanism. The communication mechanism includes a connecting bottom pipe 31 fixed to the bottom of the inner heat exchange tube 3 and connected to the inner heat exchange tube 3. A connecting sleeve 4 is fixedly connected to the inner bottom wall of the reactor 1. The connecting sleeve 4 is connected to the heat exchange jacket 2. One end of the connecting bottom pipe 31 extends into the interior of the connecting sleeve 4. The heat medium flows into the interior of the heat exchange jacket 2 and then flows into the interior of the inner heat exchange tube 3 through the connecting sleeve 4 and the connecting bottom pipe 31. The bottom of the connecting sleeve 4 is connected to the heat exchange jacket 2.

[0027] Please refer to it again. Figure 2 , Figure 3 and Figure 4 A connecting plate 32 is fixedly connected to the bottom of the connecting tube 31. A sealing ring 33 is fixedly connected to the outer surface of the connecting plate 32. The sealing ring 33 is located between the connecting plate 32 and the inner wall of the connecting sleeve 4. Under the action of the sealing ring 33, the inner heat exchange tube 3 is raised and lowered, and the connecting sleeve 4 and the connecting plate 32 are in a sealed state.

[0028] Please refer to it again. Figure 1 , Figure 2 and Figure 3 The top of the reactor 1 is equipped with a lifting mechanism for adjusting the raising and lowering of the inner heat exchange tube 3 inside the reactor 1. The lifting mechanism includes a threaded sleeve 7 rotating on the top of the reactor 1. An adjusting screw 6 is fixedly connected to the top of the inner heat exchange tube 3. The adjusting screw 6 is threadedly connected to the inside of the threaded sleeve 7. By driving the threaded sleeve 7 to rotate, the adjusting screw 6 extends outward or retracts inward, thereby pulling the inner heat exchange tube 3 to rise and fall inside the reactor 1. A drive motor 8 is fixedly connected to the top of the reactor 1. A first gear is fixedly connected to the output end of the drive motor 8. A second gear is fixedly connected to the outer surface of the threaded sleeve 7. The first gear and the second gear mesh. By starting the drive motor 8, the threaded sleeve 7 is driven to rotate by the meshing action of the first gear and the second gear.

[0029] Please refer to it again. Figure 1 and Figure 2 A heat exchange jacket 2 is fixedly connected to a heat medium inlet pipe 21 and a heat medium outlet pipe 22. A feed pipe 11 is fixedly connected to the top of the reactor 1, and a discharge pipe 12 is fixedly connected to the bottom of the reactor 1. Heat medium is injected into the interior of the heat exchange jacket 2 through the heat medium inlet pipe 21, and the heat medium is discharged by opening the valve on the heat medium outlet pipe 22. Material is injected into the interior of the reactor 1 through the feed pipe 11, and the material after the reaction is completed is discharged by opening the valve on the discharge pipe 12.

[0030] Working principle: Install the device in a suitable location and connect it to the municipal power supply. Inject the material into the reactor 1 through the injection pipe 11. Pour the heat medium that meets the appropriate temperature for the etherification reaction into the heat exchange jacket 2 through the heat medium inlet pipe 21. Under the action of the connecting sleeve 4 and the connecting bottom pipe 31, the heat medium flows into the inner heat exchange tube 3. Heat exchange is carried out on the material inside the reactor 1 through the heat exchange jacket 2 and the inner heat exchange tube 3. By starting the drive motor 8, the threaded sleeve 7 is driven to rotate through the meshing of the first gear and the second gear, so that the adjusting screw 6 extends outward or retracts inward, thereby driving the inner heat exchange tube 3 to rise and fall inside the reactor 1. Heat exchange is carried out at various height positions inside the reactor 1 as needed.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A reactor heat exchange device for the preparation of cellulose ethers, comprising a reaction vessel (1), characterized in that: A heat exchange jacket (2) is fixedly connected to the outer surface of the reactor (1). An internal heat exchange tube (3) that can be raised and lowered is provided inside the reactor (1). The heat exchange jacket (2) and the internal heat exchange tube (3) are connected by a communication mechanism. A lifting mechanism is provided at the top of the reactor (1) to adjust the internal heat exchange tube (3) to rise and fall inside the reactor (1). A heat medium inlet pipe (21) and a heat medium outlet pipe (22) are fixedly connected to the heat exchange jacket (2).

2. The reactor heat exchange device for the preparation of cellulose ethers according to claim 1, characterized in that: The communication mechanism includes a connecting bottom pipe (31) fixed at the bottom of the inner heat exchange tube (3) and connected to the inner heat exchange tube (3). A connecting sleeve (4) is fixedly connected to the inner bottom wall of the reactor (1). The connecting sleeve (4) is connected to the heat exchange jacket (2). One end of the connecting bottom pipe (31) extends into the interior of the connecting sleeve (4).

3. The reactor heat exchange device for the preparation of cellulose ethers according to claim 2, characterized in that: A connecting plate (32) is fixedly connected to the bottom of the connecting bottom tube (31), and a sealing ring (33) is fixedly connected to the outer surface of the connecting plate (32). The sealing ring (33) is located between the connecting plate (32) and the inner wall of the connecting sleeve (4).

4. The reactor heat exchange device for the preparation of cellulose ethers according to claim 1, characterized in that: The lifting mechanism includes a threaded sleeve (7) that rotates on the top of the reactor (1), and an adjusting screw (6) is fixedly connected to the top of the inner heat exchange tube (3). The adjusting screw (6) is threadedly connected inside the threaded sleeve (7).

5. The reactor heat exchange device for the preparation of cellulose ethers according to claim 4, characterized in that: The top of the reactor (1) is fixedly connected to a drive motor (8), the output end of the drive motor (8) is fixedly connected to a first gear, and the outer surface of the threaded sleeve (7) is fixedly connected to a second gear, the first gear meshing with the second gear.

6. The reactor heat exchange device for the preparation of cellulose ethers according to claim 1, characterized in that: The internal heat exchange tube (3) is spiral-shaped, and a temperature sensor (5) is fixedly connected to the inner wall of the reactor (1).

7. The reactor heat exchange device for the preparation of cellulose ethers according to claim 1, characterized in that: The top of the reactor (1) is fixedly connected to a material injection pipe (11), and the bottom of the reactor (1) is fixedly connected to a material discharge pipe (12).

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