CN220531566U - Temperature control device for polymerization reaction of paraformaldehyde - Google Patents
Temperature control device for polymerization reaction of paraformaldehyde Download PDFInfo
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- CN220531566U CN220531566U CN202322096037.6U CN202322096037U CN220531566U CN 220531566 U CN220531566 U CN 220531566U CN 202322096037 U CN202322096037 U CN 202322096037U CN 220531566 U CN220531566 U CN 220531566U
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- heat exchange
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- liquid
- paraformaldehyde
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- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 31
- 229930040373 Paraformaldehyde Natural products 0.000 title claims abstract description 29
- 229920002866 paraformaldehyde Polymers 0.000 title claims abstract description 29
- 239000007788 liquid Substances 0.000 claims abstract description 59
- 238000006243 chemical reaction Methods 0.000 claims abstract description 32
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 238000003756 stirring Methods 0.000 claims description 10
- 238000004321 preservation Methods 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 5
- 238000000034 method Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
Abstract
The application discloses a temperature control device for paraformaldehyde polymerization reaction, which comprises a heat exchange assembly, a temperature adjusting assembly connected with the heat exchange assembly, a heating assembly connected with the temperature adjusting assembly and a controller for controlling the operation of each assembly, wherein the heat exchange assembly comprises a ring columnar body arranged in a reaction kettle and a heat exchange runner arranged in the body along an axial spiral, two ends of the heat exchange runner are respectively a liquid inlet end and a liquid outlet end, the liquid inlet end is connected with the temperature adjusting assembly through a pipeline extending out of the reaction kettle, and the liquid outlet end is connected with the heating assembly through a pipeline extending out of the reaction kettle; at least one temperature sensor connected with the controller is arranged in the heat exchange flow channel. The method can effectively solve the temperature control problem in the prior art, remarkably improves the yield and quality of the polymerization reaction of the paraformaldehyde, and has important application value for the mass production of the paraformaldehyde. Meanwhile, the control system has high intelligent degree, simple and convenient operation, low maintenance cost and higher practical value.
Description
Technical Field
The application relates to the field of chemical equipment, in particular to a temperature control device for paraformaldehyde polymerization reaction with small temperature fluctuation.
Background
Paraformaldehyde is widely applied to a plurality of fields such as buildings, houses, automobiles and the like. Its preparation is generally carried out by means of polymerization, in which temperature control is an important factor affecting its quality and yield. However, the conventional paraformaldehyde polymerization temperature control device has some defects.
First, the temperature of the reactor is required to be controlled in the conventional polymerization reaction, and thus a temperature control device, which is a device having heating and controlling the heating temperature, is required. The existing temperature control device is mostly a control circuit matched with an electric heating device, temperature control is realized by adjusting the power and the working state of a heater, and certain defects still exist although the processing requirements can be met, particularly, the temperature control device is mainly characterized in that the reaction temperature fluctuates greatly in the heating process, and certain fluctuation can occur when the temperature is continuous. However, the sensitivity of the polymerization reaction to temperature is very high, and minor temperature differences may lead to significant changes in the polymerization effect, including polymerization rate, molecular weight distribution, and properties of the final product.
Therefore, the development of a novel paraformaldehyde polymerization temperature control device has important significance and value.
Disclosure of Invention
The aim of the application is to solve at least one defect existing in the prior art and provide a temperature control device for polymerization reaction of paraformaldehyde by taking oil as a heating output medium.
In order to achieve the above purpose, the application discloses a temperature control device for paraformaldehyde polymerization reaction, which comprises a heat exchange component, a temperature adjusting component connected with the heat exchange component, a heating component connected with the temperature adjusting component and a controller for controlling the operation of each component, wherein the heat exchange component comprises a ring columnar body arranged in a reaction kettle and a heat exchange runner arranged in the body and axially spiral, two ends of the heat exchange runner are respectively a liquid inlet end and a liquid outlet end, the liquid inlet end is connected with the temperature adjusting component through a pipeline extending out of the reaction kettle, and the liquid outlet end is connected with the heating component through a pipeline extending out of the reaction kettle; at least one temperature sensor connected with the controller is arranged in the heat exchange flow channel, and the temperature sensor is used for acquiring the temperature information of the body and sending the temperature information to the controller positioned outside the reaction kettle; the temperature adjusting assembly comprises a liquid mixing tank with a first liquid inlet, a second liquid inlet and a liquid outlet, an electric stirring mechanism inserted into the liquid mixing tank, at least one temperature sensor arranged at the bottom of the liquid mixing tank and a liquid feeding pump arranged on the liquid outlet, wherein the first liquid inlet is connected with the heating assembly through a heat insulation pipeline with an electric control valve controlled by a controller, the second liquid inlet is connected with an external cold source pipe with the electric control valve controlled by the controller, and the controller can control the electric control valve to be opened so that the cold source pipe feeds a specified amount of cold source into the liquid mixing tank; the heating assembly comprises a heat preservation tank, an electric heating unit inserted into the heat preservation tank and connected with the controller, and at least one temperature sensor arranged in the heat preservation tank and connected with the controller.
In some embodiments, the outer surface of the liquid mixing tank is also provided with a heat preservation and insulation layer.
In some embodiments, the heat exchange assembly is fixedly arranged in the reaction kettle to form the inner wall surface of the reaction kettle.
In some embodiments, heat fins are provided on an inner surface of the body of the heat exchange assembly.
In some embodiments, the outer surface of the body of the heat exchange assembly is provided with a teflon layer to prevent polymer sticking.
In some embodiments, there are a plurality of heat exchange assemblies, each heat exchange assembly being connected to a temperature regulating assembly.
The method can effectively solve the temperature control problem in the prior art, remarkably improves the yield and quality of the polymerization reaction of the paraformaldehyde, and has important application value for the mass production of the paraformaldehyde. Meanwhile, the control system has high intelligent degree, simple and convenient operation, low maintenance cost and higher practical value.
Drawings
Various aspects of the present disclosure will be better understood upon reading the following detailed description in conjunction with the drawings, the location, dimensions, and ranges of individual structures shown in the drawings, etc., are sometimes not indicative of actual locations, dimensions, ranges, etc. In the drawings:
fig. 1 is a schematic overall structure of an embodiment disclosed in the present application.
Fig. 2 is a schematic view of the internal structure of a heat exchange assembly in one embodiment of the present disclosure.
FIG. 3 is a schematic illustration of a heat exchange assembly in a partially cut-away configuration in accordance with one embodiment of the present disclosure.
Fig. 4 is a schematic structural view of a temperature adjusting assembly according to an embodiment of the present disclosure.
Detailed Description
The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. It should be understood, however, that the present disclosure may be embodied in many different forms and should not be limited to the embodiments described below, but rather, the embodiments described below are intended to provide a more complete disclosure of the present disclosure and to fully illustrate the scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide yet additional embodiments.
It should be understood that throughout the drawings, like reference numerals refer to like elements. In the drawings, the size of certain features may be modified for clarity.
It should be understood that the terminology used in the description is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by one of ordinary skill in the art unless otherwise defined. For the sake of brevity and/or clarity, techniques, methods and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but the techniques, methods and apparatus should be considered a part of the specification where appropriate.
As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The use of the terms "comprising," "including," and "containing" in the specification mean that the recited features are present, but that one or more other features are not excluded. The use of the phrase "and/or" in the specification includes any and all combinations of one or more of the associated listed items. The words "between X and Y" and "between about X and Y" used in this specification should be interpreted to include X and Y. The phrase "between about X and Y" as used herein means "between about X and about Y", and the phrase "from about X to Y" as used herein means "from about X to about Y".
In the description, an element is referred to as being "on," "attached" to, "connected" to, "coupled" to, "contacting" or the like another element, and the element may be directly on, attached to, connected to, coupled to or contacting the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly on," "directly attached to," directly connected to, "directly coupled to, or" directly contacting "another element, there are no intervening elements present. In the specification, one feature is arranged "adjacent" to another feature, which may mean that one feature has a portion overlapping with or located above or below the adjacent feature.
In the specification, spatial relationship words such as "upper", "lower", "left", "right", "front", "rear", "high", "low", and the like may describe the relationship of one feature to another feature in the drawings. It will be understood that the spatial relationship words comprise, in addition to the orientations shown in the figures, different orientations of the device in use or operation. For example, when the device in the figures is inverted, features that were originally described as "below" other features may be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationship will be explained accordingly.
Examples
Fig. 1 to 4 show a temperature control device for paraformaldehyde polymerization, which mainly comprises a heat exchange assembly 1, a temperature adjusting assembly 2, a heating assembly 3 and a controller 4. The heat exchange component 1, the temperature adjusting component 2 and the heating component 3 are sequentially connected to form a heating circulation loop.
In this embodiment, the heat exchange assembly 1 includes a circular columnar body 5, and the body 5 is fixedly arranged in a reaction kettle 6 for paraformaldehyde production to form an inner wall surface of the reaction kettle 6. The heat exchange flow channel 7 is spirally arranged in the body 5 along the axial direction, and two ends of the heat exchange flow channel 7 are respectively a liquid inlet end and a liquid outlet end. Wherein, the feed liquor end is connected with the temperature adjusting component 2 through the pipeline extending out of the reaction kettle 6, and the liquid outlet end is connected with the heating component 3 through the pipeline extending out of the reaction kettle 6. The heat dissipation fins 8 are arranged on the inner surface of the body 5, so that the heat transfer effect can be enhanced. The outer surface of the body 5 is provided with a teflon layer to prevent polymer sticking. At least one temperature sensor (not shown) connected with the controller 4 is arranged in the heat exchange flow channel 7 and is used for acquiring the temperature information of the body 5 and transmitting the temperature information to the controller 4 positioned outside the reaction kettle 6.
It will be appreciated that the design of the heat exchange assembly 1 as a cylinder ring has a number of advantages and is particularly suitable for the production of paraformaldehyde. Compared with the traditional direct heating mode, the annular column-shaped heat exchange assembly 1 indirectly heats through oil liquid, so that cold and hot impact can be reduced, and the durability of the reaction kettle 6 is protected. Since the polymerization reaction of paraformaldehyde needs to be carried out at high temperature, direct heating may generate large cold and hot impact on the reaction kettle 6, and the durability and stability of the reaction kettle are affected. While the annular column-shaped heat exchange assembly 1 can effectively avoid the problem. The design of the annular column enables more oil to contact the inner wall of the reaction kettle 6, so that the heat transfer area can be greatly increased, and the heat transfer efficiency is improved. This is particularly important for the polymerization of paraformaldehyde, since this reaction requires very high temperature control, requiring rapid and accurate temperature adjustment. The annular column design also enables oil to flow uniformly in the reaction kettle 6, so that heat can be transferred to various parts in the reaction kettle 6 uniformly, and the situation of local overheating or supercooling is avoided. Thus, the polymerization reaction of the paraformaldehyde can be carried out at a relatively stable temperature, which is beneficial to ensuring the effect and yield of the polymerization reaction.
In this embodiment, the tempering assembly 2 comprises a mixing tank 9, the mixing tank 9 having a first inlet, a second inlet and a outlet. The outer surface of the liquid mixing tank is provided with a heat preservation and insulation layer, so that temperature fluctuation can be reduced, and the temperature control precision is improved. The electric stirring mechanism 10 is arranged on the liquid mixing tank 9, and a stirring rod of the electric stirring mechanism 10 extends into the liquid mixing tank 9 and is used for picking up liquid in the liquid mixing tank 9, and in particular, in the embodiment, the electric stirring mechanism is used for stirring high-temperature and low-temperature oil and ensuring uniform mixing of oil. At least one temperature sensor (not shown) is arranged at the bottom of the mixed liquid tank 9 and is used for sensing the temperature in the mixed liquid tank 9 and providing control information for the controller 4. A liquid feeding pump 11 is arranged on the liquid outlet and can feed the oil in the liquid mixing tank 9 to the heat exchange assembly 1. The first liquid inlet is connected with the heating component 3 through a heat insulation pipeline with an electric control valve 13, the second liquid inlet is connected with an external cold source pipe 12, the electric control valve 13 is arranged on the cold source pipe 12, the cold source pipe 12 is connected with external normal-temperature oil, and the controller 4 can control the electric control valve 13 to be opened, so that the cold source pipe sends a specified amount of normal-temperature oil to the liquid mixing tank 9.
It will be appreciated that the temperature regulation assembly 2 plays a key role in the paraformaldehyde polymerization temperature control apparatus, and is primarily responsible for fine temperature regulation and for delivering the precisely adjusted temperature to the reaction vessel 6. Specifically, the temperature regulating assembly 2 can precisely control the amount of heat source and cold source to achieve temperature mixing inside the mixed liquid tank 9, thereby achieving fine adjustment of temperature. The temperature adjusting component 2 is provided with the electric stirring mechanism 10, so that the heat source and the cold source which are mixed together can be uniformly stirred, the temperature is uniform, the temperature layering phenomenon is avoided, and the uniform temperature output to the reaction kettle 6 is ensured.
The temperature adjusting component 2 in the embodiment is a key component for realizing the temperature control of the polymerization reaction of the paraformaldehyde, and can realize the fine control of the internal temperature of the reaction kettle 6 by precisely controlling the mixing proportion of the heat source and the cold source and realizing the temperature uniformity through the electric stirring mechanism 10, thereby ensuring the smooth running of the polymerization reaction of the paraformaldehyde.
In this embodiment, the heating assembly 3 comprises a thermal tank 14, inside which an electric heating unit (not shown) is inserted, connected to the controller 4. At least one temperature sensor (not shown) is provided in the thermal tank 14 and connected to the controller 4 for sensing the temperature in the thermal tank 14 and providing control information.
In this embodiment, the controller 4 receives temperature information of temperature sensors in the heat exchange assembly 1, the temperature adjusting assembly 2 and the heating assembly 3, and adjusts the working state of the electric heating unit and the opening state of the electric control valve 13 according to a preset temperature control strategy, so as to realize accurate control of the polymerization reaction temperature in the reaction kettle 6.
It will be appreciated that the controller 4 plays a central role in the temperature control means of the paraformaldehyde polymerisation reaction. Specifically, the controller 4 at least includes an input interface, a processing unit, a storage unit, an output interface, a communication interface, and a power module, where the input interface is used to receive temperature information from each component. In the present embodiment, this mainly comprises information from the temperature sensors of the heat exchange assembly 1, the tempering assembly 2 and the heating assembly 3. The processing unit is the core part of the controller 4 and is responsible for processing the information received by the input interface. The processing unit is typically constituted by one or more microprocessors (e.g. CPUs) which process the input information according to preset algorithms and programs to derive control commands. The storage unit is used for storing data and results processed by the processing unit and programs and algorithms required by operation. The storage unit may include a memory (e.g., RAM) and a hard disk (e.g., SSD). The output interface is responsible for transmitting the result processed by the processing unit to various components, such as an electric stirring mechanism 10, an electric control valve 13 and a liquid feeding pump 11 of the temperature regulating component 2, and an electric heating unit of the heating component 3, so as to realize control of the components.
The communication interface is used for communication between the controller 4 and an external device, such as data exchange with a computer, or interfaces with other industrial control systems. The communication interface may include various wired or wireless interfaces, such as an ethernet interface, a USB interface, a bluetooth interface, etc. The power module is responsible for providing a stable power supply to the various parts of the controller 4, including a direct current power supply and an alternating current power supply.
It will also be appreciated that the specific controller 4 configuration may be somewhat increased depending on the actual needs and design.
Although exemplary embodiments of the present disclosure have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without materially departing from the spirit and scope of the disclosure. Accordingly, all changes and modifications are intended to be included within the scope of the present disclosure as defined by the appended claims. The disclosure is defined by the following claims, with equivalents of the claims to be included therein.
Claims (6)
1. A temperature control device for polymerization of paraformaldehyde, which is characterized in that: the device comprises a heat exchange assembly, a temperature adjusting assembly connected with the heat exchange assembly, a heating assembly connected with the temperature adjusting assembly and a controller for controlling the operation of each assembly, wherein the heat exchange assembly comprises a ring column-shaped body arranged in a reaction kettle and a heat exchange flow channel arranged in the body and axially spiral, two ends of the heat exchange flow channel are respectively a liquid inlet end and a liquid outlet end, the liquid inlet end is connected with the temperature adjusting assembly through a pipeline extending out of the reaction kettle, and the liquid outlet end is connected with the heating assembly through a pipeline extending out of the reaction kettle; at least one temperature sensor connected with the controller is arranged in the heat exchange flow channel, and the temperature sensor is used for acquiring the temperature information of the body and sending the temperature information to the controller positioned outside the reaction kettle; the temperature adjusting assembly comprises a liquid mixing tank with a first liquid inlet, a second liquid inlet and a liquid outlet, an electric stirring mechanism inserted into the liquid mixing tank, at least one temperature sensor arranged at the bottom of the liquid mixing tank and a liquid feeding pump arranged on the liquid outlet, wherein the first liquid inlet is connected with the heating assembly through a heat insulation pipeline with an electric control valve controlled by a controller, the second liquid inlet is connected with an external cold source pipe with the electric control valve controlled by the controller, and the controller can control the electric control valve to be opened so that the cold source pipe feeds a specified amount of cold source into the liquid mixing tank; the heating assembly comprises a heat preservation tank, an electric heating unit inserted into the heat preservation tank and connected with the controller, and at least one temperature sensor arranged in the heat preservation tank and connected with the controller.
2. A temperature control device for paraformaldehyde polymerization of a liquid blend tank as defined in claim 1, wherein: the outer surface is also provided with a heat preservation and insulation layer.
3. A temperature control device for paraformaldehyde polymerization of a liquid blend tank as defined in claim 1, wherein: the heat exchange component is fixedly arranged in the reaction kettle to form the inner wall surface of the reaction kettle.
4. A temperature control device for paraformaldehyde polymerization of a liquid blend tank as defined in claim 1, wherein: the inner surface of the body of the heat exchange component is provided with radiating fins.
5. A temperature control device for paraformaldehyde polymerization of a liquid blend tank as defined in claim 1, wherein: the surface of the body of the heat exchange assembly is provided with a Teflon layer for preventing polymer adhesion.
6. A temperature control device for paraformaldehyde polymerization of a liquid blend tank as defined in claim 1, wherein: the heat exchange assemblies are multiple, and each heat exchange assembly is connected with the temperature adjusting assembly respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322096037.6U CN220531566U (en) | 2023-08-07 | 2023-08-07 | Temperature control device for polymerization reaction of paraformaldehyde |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322096037.6U CN220531566U (en) | 2023-08-07 | 2023-08-07 | Temperature control device for polymerization reaction of paraformaldehyde |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220531566U true CN220531566U (en) | 2024-02-27 |
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ID=89970150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322096037.6U Active CN220531566U (en) | 2023-08-07 | 2023-08-07 | Temperature control device for polymerization reaction of paraformaldehyde |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220531566U (en) |
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2023
- 2023-08-07 CN CN202322096037.6U patent/CN220531566U/en active Active
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