A high content of salicylonitrile preparation reaction kettle condensing device

Abstract

A condensation device for a high-content salicylaniline preparation reactor belongs to the field of chemical condensation technology. To address the technical problem of insufficient and uneven condensation of gas due to the temperature near the condenser tube wall being lower than the temperature at the center of the condenser tube, this invention introduces a condenser tube into the reactor via a gas delivery pipe. The gas first drives a rotating fan blade to slow its flow. The decelerated gas then flows along the outer surface of the gas separator. The coolant fully condenses the decelerated gas. During the condensation process, an electromagnet is intermittently energized. When the electromagnet is energized, it attracts a metal block, causing the gas separator to move. A second slider compresses a functional spring. When the electromagnet is de-energized, the attraction of the electromagnet to the metal block disappears, and the reaction force of the functional spring pushes the second slider, causing the electromagnet to intermittently energize and move the gas separator. A disturbance protrusion disturbs the gas.

Description

Technical Field

[0001] This invention relates to the field of chemical condensation technology, and in particular to a condensation device for a reactor used in the preparation of high-content salicylates. Background Technology

[0002] Salicylic nitrile, also known as o-hydroxybenzonitrile, is slightly soluble in water and unstable to strong alkalis or strong oxidizing agents. As a pharmaceutical intermediate, it is mainly used in the production of bannilorol hydrochloride; as a pesticide intermediate, it is mainly used in the production of the methoxyacrylate fungicide pyraclostrobin. Salicylic nitrile can also be used as an intermediate in some fragrances and liquid crystal materials. Currently, the main processes for synthesizing salicylic nitrile include the following two methods: First, salicylaldehyde reacts with hydroxylamine hydrochloride to form salicylaldehyde oxime, which is then dehydrated by acetic anhydride or thionyl chloride to obtain salicylic nitrile; second, salicylamide is dehydrated in the presence of phosgene, thionyl chloride, or phosphorus trioxide to obtain salicylic nitrile.

[0003] Salicylic amide reacts with phosgene to produce salicylic nitrile semi-finished product. The material is then washed with a first washing liquid and a second washing liquid before being transferred to a crystallization kettle for crystallization to obtain salicylic nitrile. Current production processes require condensation treatment after the dehydration kettle. Application number CN202010510480.1 discloses a condensation device, which includes a condensation assembly comprising a liquid separator group and a condenser tube. The liquid separator group includes a first liquid separator and a second liquid separator. One end of the condenser tube is connected to a first outlet, and the other end is connected to a second inlet. This device does not consider that the temperature near the condenser tube wall is lower than the temperature at the center of the condenser tube when the gas enters, resulting in insufficient and uneven condensation of the gas.

[0004] To address the aforementioned problems, a condensation device for a reactor used in the preparation of high-content salicylates is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a condensation device for a reactor used in the preparation of high-content salicylates, which can solve the problem in the above-mentioned background technology that the temperature near the wall of the condenser tube is lower than the temperature in the center of the condenser tube, resulting in insufficient and uneven condensation of the gas.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a condensation device for a high-content salicylates preparation reactor, comprising an inlet pipe and a condenser pipe, wherein the inlet pipe is connected to a downwardly inclined gas supply pipe, the other end of the gas supply pipe is coaxially fixedly connected to the condenser pipe, the other end of the condenser pipe is coaxially fixedly connected to an outlet pipe, an external condensation assembly is provided outside the condenser pipe, an internal condensation assembly is provided inside the condenser pipe, and an air-cooling assembly is provided below the condenser pipe;

[0007] The external condensation assembly includes a condensation box fixedly installed on the gas supply pipe and the gas outlet pipe. The condensation box and the condensation pipe form an external condensation cavity. An inlet pipe is provided below the condensation box and extends into the external condensation cavity. An outlet pipe is provided above the condensation pipe and extends into the external condensation cavity.

[0008] The internal condensation assembly includes a gas distribution unit disposed inside a condenser tube. An internal condensation chamber is formed inside the gas distribution unit. Several disturbance protrusions are integrally formed on the outer wall of the gas distribution unit. A moving component is provided at the end of the condenser tube away from the air inlet pipe, and a resetting component is provided at the end of the condenser tube near the air inlet pipe.

[0009] Furthermore, a first liquid inlet pipe is provided below the condenser tube, extending from the outer condenser chamber into the condenser tube, and a second liquid inlet pipe is provided below the gas separator, extending from the inner condenser chamber into the condenser tube. The first liquid inlet pipe and the second liquid inlet pipe are connected by a connecting hose.

[0010] Furthermore, a first liquid outlet pipe is provided above the condenser tube, extending from the outer condenser chamber into the condenser tube, and a second liquid outlet pipe is provided above the gas distributor, extending from the inner condenser chamber into the condenser tube. The first liquid outlet pipe and the second liquid outlet pipe are connected by a connecting hose.

[0011] Furthermore, the moving component includes a first slide rail fixedly installed on the inner side wall of the condenser pipe at the end away from the intake pipe, a first slider slidably installed in the first slide rail, a connecting rod fixedly installed at the bottom end of the first slider, the connecting rod being fixedly connected to the gas distribution end, an electromagnet fixedly installed on the inner side wall of the condenser pipe at the end away from the intake pipe, and a metal block attracted by the electromagnet fixedly installed on the side of the first slider near the electromagnet.

[0012] Furthermore, the reset assembly includes a pair of second slide rails symmetrically fixedly installed on the inner side wall of the condenser pipe at the end away from the intake pipe. A second slider is slidably arranged inside the second slide rail. Several functional springs are elastically connected between the second slide rail and the second slider. A connecting rod is fixedly installed at the bottom end of the second slider.

[0013] Furthermore, the air-cooled assembly includes a mounting component fixedly installed outside the condenser box, an air guide box fixedly installed at the bottom end of the mounting component, a negative pressure box at the bottom end of the air guide box, and a plurality of connecting hoses connecting the mounting component and the negative pressure box.

[0014] Furthermore, the outer wall of the air guide box is provided with several air inlets, the top of the negative pressure box is provided with several air outlets, and an electric fan is fixedly installed inside the negative pressure box.

[0015] Furthermore, the cross-sectional diameter of the gas distributor gradually increases uniformly from both ends toward the center, and a rotating fan blade is rotatably installed at the end of the gas distributor near the intake pipe.

[0016] Furthermore, a pressure valve is fixedly installed at the top of the air inlet pipe, and the other end of the air inlet pipe is connected to the reaction vessel.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention proposes a condensation device for a high-content salicylaniline preparation reactor. Gas from the reactor enters the condenser tube via a gas delivery pipe. The gas first drives a rotating fan blade, slowing its flow. The decelerated gas then flows along the outer surface of the gas separator. The coolant fully condenses the decelerated gas. During the condensation process, an electromagnet is intermittently energized. When the electromagnet is energized, it attracts a metal block, causing the gas separator to move. Simultaneously, a second slider compresses a functional spring. When the electromagnet is de-energized, its attraction to the metal block disappears, and the reaction force of the functional spring pushes the second slider, causing the electromagnet to intermittently energize and move the gas separator. A disturbance protrusion agitates the gas, ensuring thorough condensation and guaranteeing the device's condensation effect. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of a condensation device for a reaction vessel used in the preparation of high-content salicylates according to the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the condenser box of the present invention;

[0021] Figure 3 This is a schematic diagram of the cross-sectional structure of the condenser tube of the present invention;

[0022] Figure 4 This is a schematic diagram of the gas separation cross-sectional structure of the present invention;

[0023] Figure 5 This is a schematic diagram of the mobile component structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the reset component structure of the present invention;

[0025] Figure 7 This is a schematic cross-sectional view of the air guide box structure of the present invention;

[0026] Figure 8 This is a schematic cross-sectional view of the negative pressure box structure of the present invention.

[0027] In the diagram: 1. Intake pipe; 11. Pressure valve;

[0028] 2. Condenser; 21. First liquid inlet pipe; 22. First liquid outlet pipe;

[0029] 3. Gas supply pipe; 4. Gas outlet pipe;

[0030] 5. External condenser assembly; 51. Condenser box; 52. External condenser chamber; 53. Liquid inlet pipe; 54. Liquid outlet pipe;

[0031] 6. Internal condenser assembly; 61. Gas separator; 611. Disturbance protrusion; 612. Second liquid inlet pipe; 613. Second liquid outlet pipe; 614. Connecting hose; 62. Internal condenser chamber; 63. Connecting rod;

[0032] 64. Moving component; 641. First slide rail; 642. First slider; 643. Electromagnet; 644. Metal block;

[0033] 65. Reset assembly; 651. Second slide rail; 652. Second slider; 653. Functional spring;

[0034] 66. Rotate the fan blades;

[0035] 7. Air-cooled assembly; 71. Mounting parts; 72. Air guide box; 721. Air inlet; 73. Negative pressure box; 731. Air outlet; 732. Electric fan; 74. Connecting hose. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 - Figure 8 As shown, a condensation device for a high-content salicylates preparation reactor includes an inlet pipe 1 and a condenser pipe 2. The inlet pipe 1 is connected to a downwardly inclined gas supply pipe 3. The other end of the gas supply pipe 3 is coaxially fixedly connected to the condenser pipe 2. The other end of the condenser pipe 2 is coaxially fixedly connected to an outlet pipe 4. An external condensation component 5 is provided outside the condenser pipe 2, an internal condensation component 6 is provided inside the condenser pipe 2, and an air-cooling component 7 is provided below the condenser pipe 2.

[0038] The external condenser assembly 5 includes a condenser box 51 fixedly installed on the gas supply pipe 3 and the gas outlet pipe 4. The condenser box 51 and the condenser pipe 2 form an external condenser cavity 52. ​​A liquid inlet pipe 53 is provided below the condenser box 51 and extends into the external condenser cavity 52. ​​A liquid outlet pipe 54 is provided above the condenser pipe 2 and extends into the external condenser cavity 52.

[0039] The internal condensation assembly 6 includes a gas distribution 61 disposed inside the condenser tube 2, an internal condensation chamber 62 is provided inside the gas distribution 61, and several disturbance protrusions 611 are integrally formed on the outer wall of the gas distribution 61. A moving assembly 64 is provided at the end of the condenser tube 2 away from the air inlet pipe 1, and a resetting assembly 65 is provided at the end of the condenser tube 2 close to the air inlet pipe 1.

[0040] After entering the condenser tube 2, the gas moves along the outer surface of the gas separator 61. With the assistance of the coolant in the outer condenser chamber 52 and the inner condenser chamber 62, the gas is fully condensed, improving the condensation effect of the device.

[0041] A first liquid inlet pipe 21 is provided below the condenser tube 2, extending from the outer condenser chamber 52 into the condenser tube 2. A second liquid inlet pipe 612 is provided below the gas distributor 61, extending from the inner condenser chamber 62 into the condenser tube 2. The first liquid inlet pipe 21 and the second liquid inlet pipe 612 are connected by a connecting hose 614.

[0042] A first liquid outlet pipe 22 is provided above the condenser tube 2, extending from the outer condenser chamber 52 into the condenser tube 2. A second liquid outlet pipe 613 is provided above the gas distributor 61, extending from the inner condenser chamber 62 into the condenser tube 2. The first liquid outlet pipe 22 and the second liquid outlet pipe 613 are connected by a connecting hose 614.

[0043] The coolant first enters the outer condensing chamber 52 through the inlet pipe 53, then enters the outer condensing chamber 52 through the first inlet pipe 21, and enters the inner condensing chamber 62 along the first inlet pipe 21, connecting hose 614, and second inlet pipe 612. After the inner condensing chamber 62 is filled with coolant, the coolant returns to the outer condensing chamber 52 along the second outlet pipe 613, connecting hose 614, and first outlet pipe 22, and finally exits from the outlet pipe 54 for circulation.

[0044] The moving component 64 includes a first slide rail 641 fixedly installed on the inner wall of the condenser pipe 2 away from the end of the intake pipe 1. A first slider 642 is slidably installed in the first slide rail 641. A connecting rod 63 is fixedly installed at the bottom of the first slider 642. The connecting rod 63 is fixedly connected to the end of the gas separator 61. An electromagnet 643 is fixedly installed on the inner wall of the condenser pipe 2 away from the intake pipe 1. A metal block 644 attracted by the electromagnet 643 is fixedly installed on the side of the first slider 642 near the electromagnet 643.

[0045] The reset assembly 65 includes a pair of second slide rails 651 symmetrically fixedly installed on the inner side wall of the condenser pipe 2 at the end away from the intake pipe 1. A second slider 652 is slidably arranged inside the second slide rail 651. Several functional springs 653 are elastically connected between the second slide rail 651 and the second slider 652. A connecting rod 63 is fixedly installed at the bottom end of the second slider 652.

[0046] The gas inside the reactor enters the condenser tube 2 along the gas supply pipe 3. The gas flows along the outer surface of the gas separator 61. The coolant fully condenses the gas. During the gas condensation process, the electromagnet 643 is intermittently energized. When the electromagnet 643 is energized, it attracts the metal block 644, causing the gas separator 61 to move. At the same time, the second slider 652 compresses the functional spring 653. When the electromagnet 643 is de-energized, the attraction of the electromagnet 643 to the metal block 644 disappears. Under the reaction force of the functional spring 653, the second slider 652 is pushed, causing the electromagnet 643 to be intermittently energized to move the gas separator 61. The disturbance protrusion 611 disturbs the gas, allowing the gas to condense fully.

[0047] The air-cooled assembly 7 includes a mounting component 71 fixedly installed outside the condenser box 51. An air guide box 72 is fixedly installed at the bottom of the mounting component 71. A negative pressure box 73 is located at the bottom of the air guide box 72. Several connecting hoses 74 connect the mounting component 71 and the negative pressure box 73.

[0048] The outer wall of the air guide box 72 is provided with several air inlets 721, the top of the negative pressure box 73 is provided with several air outlets 731, and an electric fan 732 is fixedly installed inside the negative pressure box 73.

[0049] During the continuous cooling process, the temperature of the coolant will gradually rise. After the temperature of the coolant reaches a certain standard, the electric fan 732 is started, which makes the pressure in the negative pressure box 73 lower. Therefore, the outside air is discharged from the mounting part 71 along the connecting hose 74 in the air guide box 72. At the same time, the outside air enters the air guide box 72 from the air inlet 721 and is discharged from the air outlet 731, ensuring that the air outside the condenser box 51 is fully circulated, carrying away the heat from the outer surface of the condenser box 51, thereby reducing the temperature of the coolant.

[0050] The cross-sectional diameter of the gas distributor 61 gradually increases uniformly from both ends toward the center, and a rotating fan blade 66 is rotatably installed at the end of the gas distributor 61 near the intake pipe 1.

[0051] When the gas comes into contact with the rotating fan blade 66, the gas drives the rotating fan blade 66 to rotate, thereby reducing the gas flow rate and ensuring that the gas is fully condensed in the subsequent condensation process.

[0052] A pressure valve 11 is fixedly installed at the top of the air inlet pipe 1, and the other end of the air inlet pipe 1 is connected to the reaction vessel.

[0053] Specifically, firstly, the air inlet pipe 1 is connected to the reactor, and the liquid inlet pipe 53 and the liquid outlet pipe 54 are connected to the coolant source respectively. The coolant first enters the outer condensing chamber 52 from the liquid inlet pipe 53, and then enters the outer condensing chamber 52 from the first liquid inlet pipe 21. It then enters the inner condensing chamber 62 along the first liquid inlet pipe 21, the connecting hose 614, and the second liquid inlet pipe 612. After the coolant fills the inner condensing chamber 62, the coolant returns to the outer condensing chamber 52 along the second liquid outlet pipe 613, the connecting hose 614, and the first liquid outlet pipe 22. Finally, it is discharged from the liquid outlet pipe 54 for circulation, ensuring the low temperature inside and outside the condenser 2.

[0054] The gas inside the reactor enters the condenser tube 2 along the gas supply pipe 3. The gas first drives the rotating fan blade 66 to rotate, slowing down the gas flow speed. The decelerated gas flows along the outer surface of the gas separator 61. The coolant fully condenses the decelerated gas. During the gas condensation process, the electromagnet 643 is intermittently energized. When the electromagnet 643 is energized, it attracts the metal block 644, causing the gas separator 61 to move. At the same time, the second slider 652 compresses the functional spring 653. When the electromagnet 643 is de-energized, the attraction of the electromagnet 643 to the metal block 644 disappears. The reaction force of the functional spring 653 pushes the second slider 652, causing the electromagnet 643 to be intermittently energized to reciprocate the gas separator 61. The disturbance protrusion 611 disturbs the gas, allowing the gas to condense fully and ensuring the condensation effect of the device.

[0055] When the coolant temperature reaches a certain standard, the electric fan 732 starts, making the pressure in the negative pressure box 73 lower. As a result, outside air is discharged from the mounting part 71 along the connecting hose 74 in the air guide box 72. At the same time, outside air enters the air guide box 72 from the air inlet 721 and is discharged from the air outlet 731, ensuring sufficient airflow outside the condenser box 51, carrying away the heat from the outer surface of the condenser box 51, thereby reducing the temperature of the coolant.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0057] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A condensation device for a reactor used in the preparation of high-content salicylates, comprising an inlet pipe (1) and a condenser pipe (2), characterized in that, The air inlet pipe (1) is connected to a downwardly inclined air supply pipe (3). The other end of the air supply pipe (3) is coaxially and fixedly connected to a condenser pipe (2). The other end of the condenser pipe (2) is coaxially and fixedly connected to an air outlet pipe (4). An external condenser assembly (5) is provided outside the condenser pipe (2). An internal condenser assembly (6) is provided inside the condenser pipe (2). An air-cooling assembly (7) is provided below the condenser pipe (2). The external condenser assembly (5) includes a condenser box (51) fixedly installed on the gas supply pipe (3) and the gas outlet pipe (4). The condenser box (51) and the condenser pipe (2) form an external condenser cavity (52). A liquid inlet pipe (53) is provided below the condenser box (51) and extends into the external condenser cavity (52). A liquid outlet pipe (54) is provided above the condenser pipe (2) and extends into the external condenser cavity (52). The internal condensation assembly (6) includes a gas distribution (61) disposed in the condenser tube (2), an internal condensation chamber (62) is provided in the gas distribution (61), a few disturbance protrusions (611) are integrally formed on the outer wall of the gas distribution (61), a moving assembly (64) is provided at the end of the condenser tube (2) away from the air inlet pipe (1), and a resetting assembly (65) is provided at the end of the condenser tube (2) close to the air inlet pipe (1). The moving component (64) includes a first slide rail (641) fixedly installed on the inner wall of the condenser pipe (2) away from the end of the intake pipe (1), a first slider (642) slidably installed in the first slide rail (641), a connecting rod (63) fixedly installed at the bottom end of the first slider (642), the connecting rod (63) being fixedly connected to the end of the gas separator (61), an electromagnet (643) fixedly installed on the inner wall of the condenser pipe (2) away from the intake pipe (1), and a metal block (644) attracted by the electromagnet (643) fixedly installed on the side of the first slider (642) near the electromagnet (643). The reset assembly (65) includes a pair of second slide rails (651) symmetrically fixedly installed on the inner side wall of the condenser pipe (2) at the end away from the intake pipe (1). A second slider (652) is slidably arranged inside the second slide rail (651). A plurality of functional springs (653) are elastically connected between the second slide rail (651) and the second slider (652). A connecting rod (63) is fixedly installed at the bottom end of the second slider (652).

2. The condensation device for a high-content salicylaniline preparation reactor as described in claim 1, characterized in that, A first liquid inlet pipe (21) is provided below the condenser (2) and extends from the outer condenser chamber (52) into the condenser (2). A second liquid inlet pipe (612) is provided below the gas separator (61) and extends from the inner condenser chamber (62) into the condenser (2). The first liquid inlet pipe (21) and the second liquid inlet pipe (612) are connected by a connecting hose (614).

3. The condensation device for a high-content salicylaniline preparation reactor as described in claim 1, characterized in that, A first liquid outlet pipe (22) is provided above the condenser (2) and extends from the outer condenser chamber (52) into the condenser (2). A second liquid outlet pipe (613) is provided above the gas separator (61) and extends from the inner condenser chamber (62) into the condenser (2). The first liquid outlet pipe (22) and the second liquid outlet pipe (613) are connected by a connecting hose (614).

4. The condensation device for a high-content salicylaniline preparation reactor as described in claim 1, characterized in that, The air-cooled assembly (7) includes a mounting component (71) fixedly installed outside the condenser box (51). An air guide box (72) is fixedly installed at the bottom of the mounting component (71). A negative pressure box (73) is located at the bottom of the air guide box (72). Several connecting hoses (74) are connected between the mounting component (71) and the negative pressure box (73).

5. The condensation device for a high-content salicylaniline preparation reactor as described in claim 4, characterized in that, The outer wall of the air guide box (72) is provided with several air inlets (721), the top of the negative pressure box (73) is provided with several air outlets (731), and an electric fan (732) is fixedly installed inside the negative pressure box (73).

6. The condensation device for a high-content salicylaniline preparation reactor as described in claim 1, characterized in that, The diameter of the cross section of the gas separator (61) gradually increases uniformly from both ends toward the center, and a rotating fan blade (66) is rotatably installed on the end of the gas separator (61) near the intake pipe (1).

7. The condensation device for a high-content salicylaniline preparation reactor as described in claim 1, characterized in that, A pressure valve (11) is fixedly installed at the top of the air inlet pipe (1), and the other end of the air inlet pipe (1) is connected to the reactor.

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