A precision temperature control system for carbonate production

Abstract

The utility model relates to carbonate production technical field provides a kind of for carbonate production precision temperature control system, including the reaction cylinder of horizontal arrangement and for driving reaction cylinder reciprocating deflection reciprocating assembly, heat exchange piece is equipped in the reciprocating assembly, the heat exchange piece can reciprocate along reaction cylinder axial direction, several passages are arranged on the heat exchange piece, stirring assembly is equipped in the passage, the ester exchange reaction device also includes temperature control assembly;Ester exchange reaction raw material reciprocating surge with reaction cylinder reciprocating deflection, and surge direction and heat exchange piece moving direction opposite form impact dispersion effect, ester exchange reaction raw material flows through the travel of passage again by stirring assembly play stirring effect, so that ester exchange reaction raw material fully flows mixing, effectively solve stirring dead angle area problem, by heat exchange piece and ester exchange reaction raw material contact reach carries out heat exchange, and then realize to ester exchange reaction precision temperature control.

Description

Technical Field

[0001] This utility model relates to the field of carbonate production technology, specifically a precision temperature control system for carbonate production. Background Technology

[0002] Carbonate compounds (such as dimethyl carbonate and diethyl carbonate) are important chemical raw materials and are widely used in solvents, electrolytes, polycarbonate synthesis and other fields. In the industrial production of carbonates, transesterification is one of the core process steps. This type of reaction usually uses carbonate compounds (such as propylene carbonate) and alcohols (such as methanol and ethanol) as raw materials. Under the action of a catalyst, the target carbonate and by-product alcohols are generated through transesterification. This reaction process is accompanied by heat changes and is usually an exothermic reaction, which requires high control of the reaction temperature.

[0003] In transesterification reactions, heating is necessary not only in the initial stage to initiate the reaction but also to rapidly and precisely remove heat during vigorous reaction, achieving efficient temperature control to stabilize the reaction temperature within the optimal process range. Currently, the industry commonly employs jacketed or coiled heat exchange structures for temperature control in transesterification reactions. This involves installing temperature-controlled media channels on the sidewalls or inside the reaction vessel, through which a heat transfer medium (such as steam or thermal oil) or a coolant (such as cooling water) is introduced to heat or cool the reactants. Simultaneously, a stirrer within the reaction vessel is used to agitate the materials. Mechanical stirring is used to achieve mixing and enhanced heat transfer. However, since heat exchange and temperature control rely on the container wall, its heat transfer efficiency is limited. Even with a stirrer, uneven temperatures can easily form in the reaction vessel, especially in the central area and dead zones that are not easily reached by the stirring blades. This temperature gradient results in low temperature control accuracy for the entire reaction system. Local temperatures may deviate from the set value, leading to a series of problems such as inconsistent reaction progress, increased by-products, and decreased catalyst efficiency. Consequently, the stability of the production process and the quality of the final product are affected.

[0004] Therefore, this invention proposes a precise temperature control system for carbonate production to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a precise temperature control system for carbonate production to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A precision temperature control system for carbonate production includes a horizontally positioned reaction cylinder and a reciprocating assembly for driving the reaction cylinder to reciprocate. The reciprocating assembly includes a heat exchanger that can reciprocate along the axial direction of the reaction cylinder and moves towards the higher end of the reaction cylinder according to the cylinder's deflection stroke. The heat exchanger has several channels, and agitation components are provided in the channels. The transesterification reaction apparatus also includes a temperature control component for controlling the temperature of the heat exchanger. Temperature sensors for real-time monitoring of the transesterification reaction temperature are provided on the bottom sides of both ends of the reaction cylinder.

[0007] In one alternative embodiment: the temperature control component includes a flow channel disposed on a heat exchange component and a circulation component for circulating and supplying a fluid temperature control medium into the flow channel. The inlet and outlet ends of the flow channel are respectively connected to an inlet pipe and a return pipe. Both the inlet pipe and the return pipe are sealed and slide through the wall of the reaction cylinder. The outlet and return ends of the circulation component are respectively connected to the inlet pipe and the return pipe.

[0008] In one alternative: the reaction cylinder is provided with a first telescopic member for driving the heat exchange component to reciprocate along the axial direction of the reaction cylinder.

[0009] In one alternative: the reciprocating assembly includes several support members and several second telescopic members, the reaction cylinder is hinged to the support members, and the movable end of the second telescopic member is provided with a roller that abuts against the bottom side of the reaction cylinder.

[0010] In one alternative embodiment: the agitation assembly includes a rotatably mounted shaft, on which agitation blades are evenly distributed, and also includes paddle blades.

[0011] In one alternative: the reaction vessel wall is provided with a heat insulation layer.

[0012] Compared with the prior art, the beneficial effects of this utility model embodiment are as follows: The reaction chamber is driven to reciprocate by a reciprocating component, and the temperature of the heat exchanger is controlled by a temperature control component. The ester exchange reaction raw material surges back and forth with the reciprocating rotation of the reaction chamber, and the direction of the surge is opposite to the direction of movement of the heat exchanger, forming an impact dispersion effect. During the flow of the ester exchange reaction raw material through the channel, the stirring component plays a stirring role, which makes the ester exchange reaction raw material flow and mix fully, effectively solving the problem of stirring dead zones. Heat exchange is achieved through the contact between the heat exchanger and the ester exchange reaction raw material, thereby realizing precise temperature control of the ester exchange reaction.

[0013] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. Furthermore, these drawings and textual descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this application to those skilled in the art through reference to specific embodiments.

[0015] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0016] Figure 2 This is a side view of an embodiment of the present utility model.

[0017] Figure 3 This is a three-dimensional schematic diagram of the heat exchange component in an embodiment of this utility model.

[0018] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0019] Figure 5 for Figure 1 Enlarged view of section B in the middle.

[0020] Figure reference numerals: 1-Reaction cylinder, 2-Heat exchange component, 3-Channel, 4-Flow channel, 5-First telescopic component, 6-Inlet pipe, 7-Return pipe, 8-Reciprocating assembly, 801-Support component, 802-Second telescopic component, 803-Roller, 9-Circulation component, 10-Agitation assembly, 1001-Shaft, 1002-Agitator blade, 1003-Paddle blade, 11-Temperature sensor. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0022] Please see Figures 1-4A precision temperature control system for carbonate production includes a horizontally positioned reaction cylinder 1 and a reciprocating assembly 8 for driving the reaction cylinder 1 to reciprocate. The reciprocating assembly 8 is equipped with a heat exchanger 2, the outer diameter of which is adapted to the inner diameter of the reaction cylinder 1. The heat exchanger 2 is made of a thermally conductive metal material (such as stainless steel, Hastelloy, etc.). The heat exchanger 2 can reciprocate along the axial direction of the reaction cylinder 1 and moves towards the end of the reaction cylinder 1 that is higher according to the deflection stroke of the reaction cylinder 1. The heat exchanger 2 is provided with several channels 3 (for the raw materials of the ester exchange reaction to flow through). The channels 3 are equipped with a stirring assembly 10. The ester exchange reaction device also includes a temperature control assembly for controlling the temperature of the heat exchanger 2. Temperature sensors 11 for real-time monitoring of the ester exchange reaction temperature are provided on the bottom sides of both ends of the reaction cylinder 1.

[0023] According to the formula, an appropriate amount of transesterification reaction raw material is added to the reaction cylinder 1 (not filling the entire reaction cylinder 1, but leaving a certain space inside the reaction cylinder 1 so that the raw material can effectively and fully surge with the reciprocating deflection of the reaction cylinder 1). The reciprocating component 8 drives the reaction cylinder 1 to reciprocate and deflect, and the temperature of the heat exchange component 2 is controlled by the temperature control component. The transesterification reaction raw material surges back and forth with the reciprocating deflection of the reaction cylinder 1, and the surging direction is opposite to the moving direction of the heat exchange component 2, forming an impact dispersion effect. During the flow of the transesterification reaction raw material through the channel 3, the stirring component 10 plays a stirring role, so that the transesterification reaction raw material flows and mixes fully, effectively solving the problem of the stirring dead zone area. Heat exchange is achieved through the contact between the heat exchange component 2 and the transesterification reaction raw material, thereby achieving precise temperature control of the transesterification reaction. The temperature of the transesterification reaction is monitored in real time by the temperature sensor 11 and connected to the control. The temperature control component is linked. When the transesterification reaction temperature reaches the set value, the temperature control component stops heating / cooling. When the transesterification reaction temperature reaches the set value for initiating the temperature control action, the temperature control component initiates the corresponding temperature control action (heating or cooling). The above-mentioned control linkage is achieved using existing technology, so the specific hardware and software configuration and control logic will not be described in detail here. In addition, the purpose of providing temperature sensors 11 at both ends of the bottom of the reaction cylinder 1 is to ensure that at least one temperature sensor 11 can contact the reaction material to monitor the temperature, since the transesterification reaction raw material is in a reciprocating surging state. Finally, the model of the temperature sensor 11 is PT100, and the temperature sensing end of the temperature sensor 11 is recessed and located in the cylinder wall of the reaction cylinder 1, so as not to interfere with or obstruct the reciprocating movement of the heat exchange component 2 along the axial direction of the reaction cylinder 1.

[0024] Furthermore, the reaction cylinder 1 is also provided with a feed inlet and a discharge outlet.

[0025] Furthermore, the reaction cylinder 1 is provided with a heat insulation layer inside the cylinder wall (not shown in the figure) to reduce the influence of external ambient temperature.

[0026] Furthermore, the reaction cylinder 1 is provided with a first telescopic member 5 for driving the heat exchange member 2 to reciprocate along the axial direction of the reaction cylinder 1. The first telescopic member 5 is an electric telescopic rod, hydraulic telescopic rod, etc. in the prior art, and preferably a multi-stage telescopic rod. This application does not limit it here.

[0027] Please see Figure 1 In one embodiment of this utility model, the temperature control component includes a flow channel 4 (arranged to avoid the channel 3 and in a meandering manner) disposed on the heat exchange component 2 and a circulation component 9 for circulating and conveying a fluid temperature control medium (such as oil, water, etc.) into the flow channel 4. The inlet and outlet ends of the flow channel 4 are respectively connected to an inlet pipe 6 and a return pipe 7. Both the inlet pipe 6 and the return pipe 7 are sealed and slidingly penetrate the wall of the reaction cylinder 1 (sealed by a sealing ring and capable of sliding). The outlet and return ends of the circulation component 9 are respectively connected to the inlet pipe 6 and the return pipe 7 (via a flexible... (The pipe is connected), and the temperature of the heat exchange component 2 is controlled by the circulation component 9, thereby regulating the temperature of the ester exchange reaction. The circulation component 9 includes a storage tank for storing the fluid temperature control medium, a circulation pump, a cooling component, a heating component, etc. The circulation pump realizes the circulation flow of the fluid temperature control medium. When it is necessary to raise the temperature of the fluid temperature control medium to heat the raw materials of the ester exchange reaction, the heating component is activated to heat the fluid temperature control medium in the storage tank; when it is necessary to lower the temperature of the fluid temperature control medium to cool the raw materials of the ester exchange reaction, the cooling component is activated to cool the fluid temperature control medium in the storage tank. This is existing technology and will not be described in detail here.

[0028] Please see Figure 1 In one embodiment of this utility model, the reciprocating assembly 8 includes several support members 801 (fixed on the ground or other platform) and several second telescopic members 802. The reaction cylinder 1 is hinged to the support members 801. The movable end of the second telescopic member 802 is provided with a roller 803 that abuts against the bottom side of the reaction cylinder 1. Preferably, the second telescopic member 802 is a hydraulic telescopic cylinder, which drives the reaction cylinder 1 to reciprocate and deflect through the reciprocating extension and retraction of the second telescopic member 802. It should be noted that a limiting measure, such as a limiting block, is also provided between the support member 801 and the reaction cylinder 1 to limit the deflection amplitude of the reaction cylinder 1, so as to prevent the reaction cylinder 1 from tipping over.

[0029] Please see Figure 5In one embodiment of this utility model, the stirring assembly 10 includes a rotatably disposed shaft 1001, on which stirring blades 1002 are evenly distributed, and a paddle 1003 is also disposed on the shaft 1001. When the transesterification reaction raw materials flow through the channel 3, the liquid flow impacts the paddle 1003, causing the shaft 1001 to rotate, thereby causing the stirring blades 1002 to perform stirring action, thus promoting the mixing of the transesterification reaction raw materials. It should be noted that the paddle 1003 is a symmetrical airfoil paddle, and the shaft 1001 can rotate whether the liquid flow impacts the paddle 1003 from the "front" or the "back".

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A precision temperature control system for carbonate production, characterized in that, The system includes a horizontally positioned reaction cylinder (1) and a reciprocating assembly (8) for driving the reaction cylinder (1) to reciprocate. The reciprocating assembly (8) is provided with a heat exchanger (2). The heat exchanger (2) can reciprocate along the axial direction of the reaction cylinder (1), and the heat exchanger (2) moves towards the end of the reaction cylinder (1) that is higher according to the deflection stroke of the reaction cylinder (1). The heat exchanger (2) is provided with several channels (3), and the channels (3) are provided with stirring components (10). The precise temperature control system also includes a temperature control component for controlling the temperature of the heat exchanger (2). Temperature sensors (11) for real-time monitoring of the ester exchange reaction temperature are provided on the bottom sides of both ends of the reaction cylinder (1).

2. The precision temperature control system for carbonate production according to claim 1, characterized in that, The temperature control component includes a flow channel (4) provided on the heat exchanger (2) and a circulation component (9) for circulating and conveying the fluid temperature control medium into the flow channel (4). The inlet end and outlet end of the flow channel (4) are respectively connected to an inlet pipe (6) and a return pipe (7). The inlet pipe (6) and the return pipe (7) are both sealed and sliding through the wall of the reaction cylinder (1). The outlet end and the return end of the circulation component (9) are respectively connected to the inlet pipe (6) and the return pipe (7).

3. The precision temperature control system for carbonate production according to claim 1, characterized in that, The reaction cylinder (1) is provided with a first telescopic component (5) for driving the heat exchange component (2) to reciprocate along the axial direction of the reaction cylinder (1).

4. The precision temperature control system for carbonate production according to claim 1, characterized in that, The reciprocating assembly (8) includes several support members (801) and several second telescopic members (802). The reaction cylinder (1) is hinged to the support members (801). The movable end of the second telescopic member (802) is provided with a roller (803) that abuts against the bottom side of the reaction cylinder (1).

5. The precision temperature control system for carbonate production according to claim 1, characterized in that, The agitation assembly (10) includes a rotatable shaft (1001), agitation blades (1002) are evenly distributed on the shaft (1001), and a paddle blade (1003) is also provided on the shaft (1001).

6. The precision temperature control system for carbonate production according to claim 1, characterized in that, The reaction cylinder (1) has a heat insulation layer inside its cylinder wall.

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