Chemical reaction equipment

Abstract

The utility model relates to chemical reaction equipment which comprises a main body part and a stirring device arranged in the main body part, and the stirring device comprises a stirring shaft and a multi-stage stirring assembly rotatably arranged on the stirring shaft; the multi-stage stirring assembly is a three-stage stirring assembly respectively connected with the stirring shaft, and the three-stage stirring assembly comprises an upper-layer stirring blade, a lower-layer stirring blade and a middle-layer frame type stirring blade positioned between the upper-layer stirring blade and the lower-layer stirring blade. According to the chemical reaction equipment, through the multiple stages of stirring assemblies and the stirring drainage device with the guide cylinder, materials with high viscosity and materials with low viscosity can be fully stirred, and uniform mixing is achieved.

Description

Technical Field

[0001] The present disclosure belongs to the field of chemical equipment, and particularly relates to a chemical reaction device. Background Art

[0002] Chemical reaction devices (commonly reaction kettles) are devices used for physical reactions and / or chemical reactions. Reaction kettles can be classified and selected in terms of materials into carbon steel reaction kettles, stainless steel reaction kettles, and glass-lined reaction kettles, and are widely used in production users such as petroleum, chemical industry, rubber, pesticides, dyes, pharmaceuticals, food, etc. and various scientific research experimental projects. The working principle of the reaction kettle is to drive the stirring shaft through a motor to stir the reactants so that they react fully to obtain the material in the required state.

[0003] For existing chemical reaction devices, when some chemical materials react, it is necessary to control the temperature of the reaction system. An inappropriate system temperature is likely to have an adverse impact on the target reaction of the chemical materials. However, some reaction kettles cannot control the temperature, which reduces the yield of the target product and increases the production cost.

[0004] On the other hand, in order to make the chemical materials react fully, existing chemical reaction devices are usually equipped with a stirring device. However, the structure of some stirring devices is too single, so that when there are stratified chemical materials or chemical materials with different viscosities, not all the materials can be fully stirred, and the practicability is poor. In addition, during the reaction process, some chemicals will generate gas. If the gas cannot be discharged in time, the pressure in the reaction kettle will increase, posing a safety hazard. Summary of the Utility Model

[0005] In view of this, the present disclosure provides a chemical reaction device, including a main body part and a stirring device disposed in the main body part. Among them, the stirring device includes a stirring shaft and a multi-stage stirring component rotatably disposed on the stirring shaft. The multi-stage stirring component is a three-stage stirring component respectively connected to the stirring shaft, and the three-stage stirring component includes an upper stirring paddle, a lower stirring paddle, and a middle frame-type stirring paddle located between the upper stirring paddle and the lower stirring paddle.

[0006] According to one embodiment, the chemical reaction device further includes a plurality of baffles extending radially from the inner wall of the main body part towards the center of the main body part. The plurality of baffles includes 4 baffles evenly arranged circumferentially on the inner wall of the main body part. Preferably, the radially extending width of each baffle among the plurality of baffles is 0.05 - 0.15 times the inner diameter of the main body part.

[0007] According to one embodiment, the stirring device includes a draft tube disposed around the multi-stage stirring component.

[0008] According to one embodiment, the chemical reaction equipment further includes a cover assembly and a cleaning assembly disposed on the cover assembly.

[0009] Preferably, the cleaning assembly includes a rotary cleaning ball.

[0010] According to one embodiment, the upper stirring paddle is a downward pressing stirring paddle, and the lower stirring paddle is a disk turbine stirring paddle.

[0011] According to one embodiment, the height of the draft tube is greater than or equal to the height of the stirring assembly.

[0012] According to one embodiment, the height of the draft tube is 0.3 - 0.7 times the height of the main body portion, and / or the inner diameter of the draft tube is greater than the outermost dimension of the frame type stirring assembly.

[0013] According to one embodiment, the chemical reaction equipment includes at least one of the following features:

[0014] Relative to the bottom surface of the accommodation cavity of the main body portion, the position of the upper stirring paddle on the stirring shaft is within the section of 0.5 - 0.8 times the height of the accommodation cavity;

[0015] Relative to the bottom surface of the accommodation cavity of the main body portion, the position of the middle layer frame type stirring paddle on the stirring shaft is within the section of 0.3 - 0.6 times the height of the accommodation cavity;

[0016] Relative to the bottom surface of the accommodation cavity of the main body portion, the position of the lower stirring paddle on the stirring shaft is within the section of 0.1 - 0.3 times the height of the accommodation cavity.

[0017] According to one embodiment, the middle layer frame type stirring paddle includes stirring blades and connecting rods, and the stirring blades are detachably connected to the stirring shaft through the connecting rods.

[0018] According to one embodiment, the total radial width of the middle layer frame type stirring paddle is 0.5 - 0.75 times the inner diameter of the accommodation cavity of the main body portion.

[0019] According to one embodiment, the disk turbine stirring paddle includes a disk at the center and a plurality of blades disposed on the periphery of the disk.

[0020] According to one embodiment, the disk turbine stirring paddle is an inclined blade disk turbine stirring paddle, and the plane where the blades are located has an included angle of 15 - 45° with the plane where the disk is located.

[0021] According to one embodiment, the chemical reaction device further includes a temperature regulation system around the outer periphery of the main body portion. The temperature regulation system sequentially includes an outer shell, a heat insulation layer, a jacket disposed between the heat insulation layer and the main body portion, and a heating element from outside to inside.

[0022] Wherein, the jacket has a hollow chamber, and the heating element is fixedly attached to the outer wall of the jacket and extends into the hollow chamber.

[0023] According to one embodiment, the chemical reaction device further includes an automatic replenishment system;

[0024] The automatic replenishment system includes a controller, a storage container communicated with the hollow chamber of the temperature regulation system, and a magnetic flap level gauge disposed on the side of the jacket and communicated with the hollow chamber of the jacket; wherein, the magnetic flap level gauge has a remote transmission level gauge and a level sensor disposed at the top, a pipeline communicating with the hollow chamber, and a valve disposed on the pipeline. And, the remote transmission level gauge, the level sensor and the valve are communicatively connected with the controller.

[0025] According to another embodiment, the chemical reaction device further includes one or more feeding components on the cover assembly. One of the feeding components includes a vertical feeding pipe and a distributor horizontally communicated with the lower end of the feeding pipe.

[0026] Preferably, the distributor is a coil type distributor with through holes.

[0027] According to still another embodiment, the chemical reaction device further includes a plurality of flow guiding plates horizontally disposed in the jacket.

[0028] The chemical reaction device of the present disclosure can fully stir materials with different viscosities, is easy to clean, and can automatically replenish the heating medium for the temperature regulation system of the reaction device, thereby precisely heating and controlling the temperature of the materials in the reaction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a longitudinal sectional view of the chemical reaction device according to the first embodiment of the present disclosure;

[0030] Figure 2 is a schematic diagram of a baffle disposed in the accommodation cavity of the chemical reaction device of the present disclosure;

[0031] Figure 3 is a flow chart of the materials in the accommodation cavity of the chemical reaction device according to the first embodiment of the present disclosure during stirring;

[0032] Figure 4Schematic diagram of the distributor in the chemical reaction equipment according to the present disclosure;

[0033] Figure 5 Schematic diagram of the upper stirring paddle in the chemical reaction equipment according to the present disclosure;

[0034] Figure 6 Schematic diagram of the middle stirring paddle in the chemical reaction equipment according to the present disclosure;

[0035] Figure 7 and Figure 8 Schematic diagram of the lower stirring paddle in the chemical reaction equipment according to the present disclosure;

[0036] Figure 9 and Figure 10 Schematic diagram of the baffle and its fixing assembly in the chemical reaction equipment according to the present disclosure;

[0037] Figure 11 Top view of the chemical reaction equipment according to the present disclosure;

[0038] Figure 12 Schematic diagram of the heating element in the chemical reaction equipment according to the present disclosure;

[0039] Figure 13 Working flowchart of the temperature regulation system of the chemical reaction equipment according to the present disclosure.

[0040] Explanation of reference numerals:

[0041] 1 - accommodation chamber, 2 - hollow chamber, 3 - heat insulation layer, 4 - upper stirring paddle, 5 - middle stirring paddle, 6 - lower stirring paddle, 7 - draft tube, 8 - outer shell, 9 - baffle, 10 - deflector, 11 - driver, 12 - stirring shaft, 13 - heating wire, 14 - flange sleeve, 15 - cover plate, 16 - first feed pipe, 17 - second feed pipe, 18 - distributor, 19 - rotatable cleaning ball, 20 - first flange, 21 - head, 22 - observation hole, 23 - fixing assembly, 24 - explosion-proof LED viewing lamp, 25 - second remote thermometer, 26 - liquid level sensor, 27 - main body, 29 - heat transfer medium outlet, 30 - remote liquid level gauge, 31 - drain port, 32 - heat transfer medium inlet, 33 - discharge port, 34 - thermometer, 35 - first remote thermometer, 36 - exhaust device, 37 - inserted pin, 38 - through hole, 39 - first fixing plate, 40 - second fixing plate, 41 - bolt, 51 - stirring blade, 52 - connecting rod, 53 - frame. Detailed implementation manners

[0042] Conventional chemical reaction equipment is usually only suitable for material systems with relatively low viscosities. For material systems with relatively high viscosities or material systems with a large range of viscosity changes, the stirring force is weak, resulting in uneven material systems for chemical reactions, prone to generating by-products, and thus affecting the yield of the target product.

[0043] The chemical reaction equipment of the present disclosure mainly includes a cover assembly, a main body part, a stirring device, and a temperature regulation system, and can be used for both full stirring of low-viscosity materials and full mixing of high-viscosity materials.

[0044] According to one embodiment, further, the chemical reaction equipment may further include a feeding assembly, a cleaning assembly, and / or an observation assembly.

[0045] Main body part

[0046] In the chemical reaction equipment according to the present disclosure, the inner wall of the main body part defines a receiving cavity for receiving reaction materials. According to the physical and chemical properties, operating temperature, and pressure of the reaction materials, the inner wall of the main body part is usually made of materials such as stainless steel, carbon steel, alloy steel, or enamel to ensure corrosion resistance, high-temperature resistance, and high-pressure resistance during the chemical reaction process. The receiving cavity is usually cylindrical, facilitating uniform heating and stirring, and being easy to clean. According to the actual situation, the receiving cavity may also adopt shapes such as a prismatic shape or a conical cylindrical shape.

[0047] According to a specific embodiment, refer to Figure 1 , a plurality of baffles 9 extending radially from the inner wall of the main body part towards the center of the main body part are provided inside the main body part, preferably including 4 baffles evenly arranged circumferentially and axially symmetrically on the inner wall of the main body part. Specifically, the radial width of each baffle is independently 0.05 - 0.15 times the inner diameter of the receiving cavity 1, for example, 0.1 times. The radial widths of the respective baffles may be the same or different. Preferably, the widths of the axially symmetric baffles are equal to ensure the stability of the equipment during stirring. According to another specific embodiment, refer to Figure 2 , the baffle 9 may be a plug-in baffle, inserted into the inner wall of the main body part through plug-in pins 37 on the side of the baffle, facilitating replacement and maintenance.

[0048] Refer to Figure 3 , by providing a baffle inside the receiving cavity, the tangential flow of the reaction materials during stirring can be transformed into axial flow and radial flow, which is beneficial to increasing the turbulence degree of the materials, and thus improving the stirring effect.

[0049] Cover assembly

[0050] Specifically, refer to Figure 1 , the chemical reaction equipment of the present disclosure further includes a cover assembly. Among them, the cover assembly includes a head 21 and a first flange 20 connecting the head 21 to the main body part.

[0051] According to one embodiment, an observation assembly for inspection and operation may also be provided on the head 21, such as an observation hole 22 with a sight glass and an explosion-proof LED sight lamp 24, a feeding assembly, and / or a cleaning assembly.

[0052] One or more feeding assemblies are provided on the cover assembly. Among them, at least one of the feeding assemblies includes a vertical feeding pipe and a distributor horizontally communicating with the lower end of the feeding pipe. Specifically, referring to Figure 1 , a first feeding pipe 16 and a second feeding pipe 17 are provided on the head 21. Among them, the first feeding pipe 16 is a vertical pipe that leads to the lower part of the accommodating cavity 1 and is usually used for adding solid materials. The second feeding pipe 17 is a vertical pipe, and its lower end is communicated with the distributor 18. According to a specific embodiment, the second feeding pipe 17 may include multiple sections, and adjacent sections may be connected by flanges so that the length of the feeding pipe can be adjusted as needed, thereby adjusting the feeding position, and it is also convenient for segmented maintenance and replacement of the second feeding pipe 17.

[0053] Further referring to Figure 1 , Figure 4 and Figure 11 , the distributor 18 is communicated with the lower end of the second feeding pipe 17 and extends radially in the accommodating cavity 1. Preferably, the distributor 18 may be a pipe with multiple through holes 38, which can be used to input gas materials or liquid materials and is beneficial to the uniform distribution of the input materials in the accommodating cavity 1. The distributor 18 may also be a coil structure, and the coil wall has uniformly distributed through holes 38 to increase the distribution area of the input materials. The aperture of the through hole 38 may be 5 - 25 mm, such as 15 mm, and the aperture of the through hole 38 may vary with the diameter of the coil.

[0054] The cover assembly may further include an exhaust device 36 provided on the head 21, such as a pressure gauge, a safety valve, a vent port, etc.

[0055] In this embodiment, an exhaust device is installed in the chemical reaction equipment, which can effectively discharge the excess gas in the device, effectively prevent the problem of cylinder explosion caused by air pressure difference, and make the chemical reaction equipment safer and more practical. By setting a purifier, some toxic gases generated by chemical reactions can be filtered out, making the equipment safer.

[0056] In the chemical reaction equipment of the present disclosure, a cleaning assembly may also be provided on the cover assembly for quickly and efficiently cleaning the inside of the main body part. The cleaning assembly is usually connected to the cover assembly through a flange. Referring to Figure 1, According to a specific embodiment, the cleaning assembly may include one or more rotatable cleaning balls 19, such as two rotatable cleaning steel balls. When the operation in the reaction device ends, the cleaning assembly may spray cleaning liquid into the accommodating cavity of the reaction device and use rotational movement to cover every corner of the inner surface of the accommodating cavity to achieve 360° cleaning, thereby ensuring thorough cleaning.

[0057] Stirring device

[0058] According to an embodiment, the stirring device used in the chemical reaction device of the present disclosure may include a stirring shaft and a multi-stage stirring assembly rotatably arranged on the stirring shaft. In order to effectively stir materials with different viscosities, the multi-stage stirring assembly adopted in the present disclosure may be three-stage stirring blades respectively connected to the stirring shaft.

[0059] The three-stage stirring assembly generally refers to the combination of three stirring blades. The design and function of each layer of stirring blades may be different to achieve a more efficient mixing effect. The three-stage stirring assembly may include a downward pressing stirring blade in the upper layer, a horizontal frame-type stirring blade in the middle layer, and a disk turbine-type stirring blade in the lower layer.

[0060] See Figure 1 , the stirring device may include a stirring shaft 12 and a three-stage stirring assembly connected to the stirring shaft 12. The three-stage stirring assembly may include an upper-layer stirring blade 4, a middle-layer stirring blade 5, and a lower-layer stirring blade 6. Further, the stirring device may further include a driver 11 for driving the stirring shaft 12 to rotate.

[0061] Among them, as Figure 5 shown, the upper-layer stirring blade 4 may be a downward pressing four-blade paddle-type stirring blade. Specifically, the upper-layer stirring blade 4 is detachably connected to the stirring shaft 12.

[0062] According to an embodiment, relative to the bottom surface of the accommodating cavity 1 of the main body part, the position of the upper-layer stirring blade 4 on the stirring shaft 12 may be within the section of 0.5 to 0.8 times the height of the accommodating cavity, preferably within the section of 0.6 to 0.7 times. The total radial width of the upper-layer stirring blade 4 may be 0.3 to 0.5 times the width of the accommodating cavity, preferably 0.4 times. The total radial width of the upper-layer stirring blade 4 is defined as the radial distance between the outer sides of the upper-layer stirring blades on both sides of the stirring shaft 12. Specifically, for example, it is the radial distance between the outer sides of the square stirring blades on both sides of the stirring shaft 12.

[0063] The above-mentioned upper-layer stirring blade makes the materials floating on the surface be pushed from top to bottom when rotating, promotes the material circulation in the accommodating cavity of the main body part of the whole reaction device, so that the mixing effect of the materials floating on the surface can be enhanced, the material mixing uniformity can be improved, and the dead corners and unmixed areas of mixing can be prevented.

[0064] The middle stirring paddle is a frame - type stirring paddle. Specifically, as shown in Figure 6 , the middle frame - type stirring paddle 5 includes stirring blades 51 and connecting rods 52. The two stirring blades 51 are detachably connected to the stirring shaft 12 through the connecting rods 52. Preferably, the connecting rods 52 can be three parallel connecting rods, which are respectively connected to the stirring blades 51 through the frame 53. The frame - type stirring paddle can generate a large shear force and eddy current in the material to be stirred, and has a high mixing efficiency, so it is suitable for stirring high - viscosity materials and solid - liquid mixed materials.

[0065] According to a specific embodiment, relative to the bottom surface of the accommodation cavity of the main body part, the height of the middle stirring paddle 5 can be within the range of 0.3 - 0.6 times, preferably within the range of 0.4 - 0.5 times, of the height of the accommodation cavity. The total radial width of the blades of the middle stirring paddle 5 is 0.5 - 0.75 times, preferably 0.6 - 0.7 times, for example 0.65 times, of the inner diameter of the accommodation cavity. The total radial width of the middle stirring paddle 5 is defined as the radial distance between the outermost radial edges of the middle stirring paddles on both sides of the stirring shaft 12. Specifically, for example, it is the radial distance between the outer edges of the stirring blades 51 on both sides of the stirring shaft 12.

[0066] See Figure 7 and Figure 8 , the lower stirring paddle 6 can be a disk turbine - type stirring paddle. Specifically, the lower stirring paddle 6 is an upward - turning stirring paddle and is detachably connected to the stirring shaft 12.

[0067] The above - mentioned disk turbine - type stirring paddle can include a central disk and a plurality of blades arranged around the disk. According to an embodiment, the above - mentioned disk turbine - type stirring paddle can be an inclined - blade disk turbine - type stirring paddle. Among them, the plane of the blade has a certain angle with the plane of the disk, and this angle can be 15 - 45°, for example 30°. This structure enables the disk turbine - type stirring paddle to have certain axial flow characteristics, so as to obtain better circulation performance. Compared with the straight - blade disk turbine stirring paddle, the inclined - blade disk turbine - type stirring paddle has a lower shear force, which makes it more suitable for processing some materials sensitive to shear force. In addition, the blades of the inclined - blade disk turbine - type stirring paddle are designed with a larger backward angle, which not only helps to improve the discharge performance, reduce the power consumption, but also can reduce the wear of the blades, thereby prolonging the service life of the stirring paddle.

[0068] The functions of the disk in the above - mentioned disk turbine - type stirring paddle include having strong convective circulation ability and shear force. The large bubbles in the accommodation cavity are blocked by the disk and can only flow from the center of the disk to the edge, so they are broken and dispersed by the blades around the disk, improving the oxygen dissolution coefficient and obtaining a good stirring effect.

[0069] In the chemical production process, inclined-blade disk turbine agitator blades are commonly used in operations such as mixing, stirring, and homogenization, and can provide efficient mixing and dispersion effects, thereby improving the quality and output of products.

[0070] According to one embodiment, relative to the bottom surface of the accommodation cavity 1 of the main body part, the position of the lower stirring blade 6 on the stirring shaft 12 can be within the range of 0.1 to 0.3 times the height of the accommodation cavity, preferably within the range of 0.15 to 0.25 times the height of the accommodation cavity. The total radial width of the lower stirring blade 6 can be 0.2 to 0.5 times the inner diameter of the accommodation cavity, preferably 0.33 times. The total radial width of the lower stirring blade 6 is defined as the radial distance between the outer sides of the blades of the lower stirring blade 6 on both sides of the stirring shaft 12. Thus, the above-mentioned lower stirring blade ensures that the stirring device can operate effectively in the reaction equipment, while avoiding contact with the inner wall of the main body part, thereby reducing wear and energy loss. The size specifications of the above-mentioned inclined-blade disk turbine agitator blades can also be referred to the national standard HG / T3796.5-2005.

[0071] See Figure 3 , when the above-mentioned lower stirring blade rotates, it pushes the bottom material upward, and cooperates with the upper pressing-type stirring blade, so that the stirred material forms an up-and-down circulating flow in the accommodation cavity. This helps to avoid sedimentation of the bottom material and ensure overall uniform mixing.

[0072] The above-mentioned stirring device includes a three-stage stirring assembly. The upper stirring assembly is a pressing-type four-blade stirring blade, the middle stirring assembly is a frame-type stirring blade, and the lower layer is an upward-turning inclined-blade disk turbine-type stirring blade, which can adapt to both low-viscosity materials and medium-viscosity and high-viscosity materials, and the viscosity range of the conveyed material can reach 1 to 100 Pa·s.

[0073] According to another embodiment, see Figure 1 , Figure 3 , Figure 9 and Figure 10 , the above-mentioned stirring device may further include a draft tube 7. The draft tube 7 is detachably arranged on the inner wall of the main body part through a fixing component 23, and surrounds part or all of the area of the three-stage stirring assembly. Preferably, it surrounds at least the area of the upper stirring blade and the middle stirring blade. More preferably, it surrounds at least the height of the second feed pipe 17 and the distributor 18. Specifically, relative to the bottom surface of the accommodation cavity 1 of the main body part, the height of the draft tube 7 can be within the range of 0.2 to 0.7 times the height of the accommodation cavity 1, preferably within the range of 0.3 to 0.6 times the height of the accommodation cavity 1, for example, within the range of 0.45 times the height of the accommodation cavity 1. The inner diameter of the draft tube 7 can be 0.6 to 0.8 times the inner diameter of the accommodation cavity, preferably 0.7 times.

[0074] The fixing assembly 23 includes a plurality of first fixing plates 39 fixedly connected (such as by welding) to the outer side of the draft tube 7, for example, three or four first fixing plates 39, and a plurality of second fixing plates 40 fixedly connected to the inner wall of the main body part, wherein the positions of the second fixing plates 40 correspond to those of the first fixing plates 39, and matching bolt holes are provided at the centers of both of them (as Figure 10 shown), for fastening and assembling by bolts 41, thereby facilitating disassembly, regular maintenance and repair.

[0075] See further Figure 3 , the draft tube can enable the liquid discharged from the three-stage stirring assembly to form an up-and-down circulating flow inside and outside the draft tube, so as to increase the degree of fluid turbulence and reduce short circuit.

[0076] Temperature regulation system

[0077] In the chemical reaction equipment of the present disclosure, a temperature regulation system may further be included. See Figure 1 . According to a specific embodiment, the temperature regulation system surrounds the outer periphery of the main body part, and may sequentially include an outer shell 8, a heat insulation layer 3, a jacket having a hollow chamber 2 located between the heat insulation layer 3 and the outer wall of the main body part, and a heating element from outside to inside. The heat insulation layer 3 may adopt a refractory fiber layer, so as to effectively block the loss of heat during the heating process.

[0078] Further, see Figure 12 . The heating element may include a flange sleeve 14 and an electric heating wire 13. The heating element may be detachably attached to the outer wall of the jacket through the flange sleeve 14, and the electric heating wire 13 extends into the hollow chamber 2. The heating element assembled in this way is convenient for disassembly, descaling and replacement and repair. According to an embodiment, the heating elements may be symmetrically arranged on both sides of the main body part, and each group of heating elements is provided with a cover plate 15 for protecting the heating elements.

[0079] The hollow chamber 2 is used to accommodate a heat transfer medium, such as mineral oil or water, and water is usually used as the heat transfer medium. When it is necessary to heat the material in the accommodation chamber 1, the controller is used to energize the electric heating wire 13 to start heating, so as to heat the heat transfer medium in the hollow chamber 2, and the temperature of the heated medium is used to transfer heat to the material inside the accommodation chamber, providing a suitable temperature environment for it, which is beneficial to the progress of the target reaction.

[0080] A heat transfer medium inlet 32 is provided at the bottom of the jacket, and a heat transfer medium outlet 29 is provided at the upper part. A plurality of flow guiding plates 10 may further be provided in the hollow chamber 2 of the jacket for guiding the flow direction of the heat transfer medium in the hollow chamber 2 and enhancing the heat transfer process between the heat transfer medium and the content in the accommodation chamber.

[0081] The above temperature regulation system further includes a controller disposed on the outer shell 8 and a temperature detection device. For example, the temperature detection device may include a thermometer 34 disposed at the bottom of the reaction device and extending into the accommodation chamber 1, a first remote thermometer 35 disposed at the lower part of the main body and extending into the hollow chamber 2, and a second remote thermometer 25 disposed at the head 21 and extending into the upper part of the accommodation chamber 1. These thermometers respectively monitor the temperature of the reaction material in the accommodation chamber 1 and the temperature of the heat transfer medium in the hollow chamber 2. According to one embodiment, the temperature detection device is communicatively connected to the controller. When the temperature sent by the temperature detection device received by the controller is lower than the lower limit value of the predetermined temperature range, especially when the temperature of the reaction material measured by the second remote thermometer 25 is lower than the lower limit value of the predetermined temperature range, the controller sends an instruction to the heating element, and the heating element starts to heat, heating the heat transfer medium in the hollow chamber 2 to the required temperature. When the temperature sent by the temperature detection device received by the controller is higher than the upper limit value of the predetermined temperature range, especially when the temperature of the reaction material measured by the second remote thermometer 25 is higher than the upper limit value of the predetermined temperature range, the controller sends an instruction to the heating element, and the heating element stops heating.

[0082] According to another embodiment, the above temperature regulation system may further include an automatic replenishment system for automatically replenishing the heat transfer medium to the hollow chamber 2 to prevent the heating wire of the heating element from being exposed above the liquid level and causing dry burning.

[0083] According to one embodiment, referring to Figure 1 , as the reaction progresses, the heat transfer medium in the jacket gradually loses. To ensure the maximum utilization efficiency of the heat transfer medium, a storage container (not shown) is provided outside it. The heat transfer medium inlet 32 of the hollow chamber 2 is connected to the storage container through a circulation pump (not shown), and the heat transfer medium outlet 29 is respectively connected to the storage container through a pipeline and a valve provided on the pipeline. Moreover, a first remote liquid level gauge 35 and a liquid level sensor are provided in the hollow chamber. Among them, the hollow chamber 2 forms a circulation with the storage container through the heat transfer medium inlet 32 and the heat transfer medium outlet 29. When the temperature of the heat transfer medium is lower than the set temperature, the heating element automatically starts to heat; when the temperature of the heat transfer medium is higher than the set temperature, the heat transfer medium is automatically replenished from the heat transfer medium inlet 32 at the bottom of the jacket. To prevent the heating element from dry burning, when the liquid level of the heat transfer medium in the hollow chamber is lower than the set minimum liquid level, the jacket automatically replenishes from the heat transfer medium inlet 32 at the bottom.

[0084] In addition, a magnetic-drum level gauge is provided on the side of the jacket. The magnetic-drum level gauge is of the side-mounted type and includes a main pipe body 27, two flange pipes on one side of the main pipe body 27, a magnetic-drum on the other side of the main pipe body 27, a remote level gauge 30 and a level sensor 26 at the top of the main pipe body 27, and a drain port 31 at the lower end of the main pipe body 27. Preferably, a valve is provided between each flange pipe and the main pipe body respectively. The magnetic-drum level gauge is horizontally and communicatively connected to the hollow chamber 2 of the jacket through the upper and lower flange pipes respectively. The main pipe body 27 is of a transparent structure, and an internal float ball is slidably installed vertically inside for facilitating the observation of the liquid level. When the pressure generated by the heat-transfer medium heated in the jacket increases, it can be discharged through the drain port 31 at the lower end of the magnetic-drum level gauge into an exhaust gas treatment device (not shown). Further, the upper pipe orifice of the magnetic-drum level gauge is flush with the heat-transfer medium outlet 29 of the jacket, so that the liquid levels measured by the remote level gauge 30 and the level sensor 26 can correspond to the liquid level of the heat-transfer medium in the hollow chamber 2. The remote level gauge 30 and the level sensor 26 are communicatively connected to the controller, whereby the automatic replenishment of the heat-transfer medium can be realized.

[0085] The controller is communicatively connected to the level gauge, the level sensor and the valve. Further, referring to Figure 13 , the working procedure of the automatic replenishment system may include: S101, setting the standard liquid level height in the hollow chamber and inputting the standard liquid level height value into the controller; S102, the level gauge and / or the level sensor detecting the liquid level in the hollow chamber and sending the detected liquid level height value in the hollow chamber to the controller; S103, the controller comparing whether the received liquid level height value is lower than the pre-input standard liquid level height value; S104, when the received liquid level height value by the controller is lower than the pre-input standard liquid level height value, the controller sending an instruction to the valve of the input pipeline, and the valve opening, and the heat-transfer medium being input into the hollow chamber; S105, when the received liquid level height value by the controller is greater than or equal to the pre-input standard liquid level height value, the controller sending an instruction to the valve of the input pipeline, and the valve closing, and the input of the heat-transfer medium stopping. After performing step S104, it returns to step S103.

[0086] Similarly, the controller can also be communicatively connected to the heating element and the driver of the stirring device to control the start or stop of the heating of the heating element and the operation or stop of the stirring device.

[0087] According to one embodiment, a discharge port 33 is provided below the chemical reaction equipment of the present disclosure, particularly below the main body part, for discharging the materials in the accommodation chamber 1.

[0088] The above temperature control system, through a structure including a heating element, a heat-insulating layer, an automatic replenishment system, and heat dissipation through-holes, utilizes the combined effects of the above heating methods, heat insulation methods, heat preservation methods, and heat dissipation methods to ensure that the temperature of the reaction system can be accurately and timely controlled, and the temperature of the reaction system can be maintained within a safe range during the reaction process, improving the accuracy and efficiency of the system temperature control of the equipment, and further improving the efficiency of the equipment.

[0089] The conventional operations in the operation steps of the reactor of the present disclosure are well-known to those skilled in the art and will not be elaborated herein.

[0090] Compared with the prior art, the chemical reaction equipment of the present disclosure has the following beneficial effects:

[0091] 1. The chemical reaction equipment is equipped with a more effective stirring device. Specifically, by adopting a multi-stage stirring assembly, the shearing force of stirring is increased, the stirring range is expanded, and the flow direction of the material is guided by a draft tube, so that all materials in different layers or different phases in the accommodation cavity can be stirred, effectively promoting the sinking of the materials floating on the surface and fully mixing with other materials, thereby improving the uniformity of stirring, shortening the stirring time, and being applicable to stirring materials with both small and large viscosity ranges, such as media with a viscosity in the range of 1 to 100 Pa·s;

[0092] 2. When stirring materials with low viscosity, under the action of centrifugal force, the liquid surges upward along the inner wall, and the liquid level at the center of stirring decreases. The present disclosure reduces the formation of vortices during stirring by arranging baffles in the accommodation cavity, converting the tangential flow of the fluid into axial flow and radial flow, and at the same time increasing the turbulence degree of the liquid, thereby improving the stirring effect;

[0093] 3. The heating element is fixed on the outer wall of the main body part by using a flange structure, which is convenient for disassembly, descaling or replacement, avoiding the problem that the installation of the heating element on the inner wall of the accommodation cavity affects the heating effect due to easy scaling;

[0094] 4. Using the automatic replenishment system to automatically replenish the heat transfer medium to the equipment, preventing the heating element from being exposed above the liquid level and causing dry burning;

[0095] 5. Using the rotatable cleaning ball arranged on the cover assembly, the accommodation cavity can be cleaned 360°, improving the cleaning effect and efficiency.

[0096] The above-described embodiments have elaborated on the technical solutions of the present disclosure in detail. It should be understood that the above are only specific embodiments of the present disclosure and do not limit the present disclosure. Any modifications, supplements, or substitutions in a similar manner within the scope of the principles of the present disclosure should be included within the protection scope of the present disclosure.

Claims

1. A chemical reaction device, comprising a main body part and a stirring device arranged inside the main body part, characterized in that, The stirring device includes a stirring shaft and a multi-stage stirring assembly rotatably arranged on the stirring shaft; Among them, the multi-stage stirring assembly is a three-stage stirring assembly respectively connected to the stirring shaft, and the three-stage stirring assembly includes an upper stirring blade, a lower stirring blade, and a middle frame-type stirring blade located between the upper stirring blade and the lower stirring blade.

2. The chemical reaction equipment according to claim 1, characterized in that, It further includes a plurality of baffles radially extending from the inner wall of the main body portion towards the center of the main body portion.

3. The chemical reaction equipment according to claim 1, wherein The stirring device includes a draft tube arranged around the multi-stage stirring assembly.

4. The chemical reaction equipment according to claim 1, characterized in that, The chemical reaction equipment further includes a cover assembly and a cleaning assembly arranged on the cover assembly; Among them, the cleaning assembly includes a rotary cleaning ball.

5. The chemical reaction equipment according to claim 1, characterized in that The upper stirring blade is a downward pressing type stirring blade; and / or The lower stirring blade is a disk turbine type stirring blade.

6. The chemical reaction device according to claim 2, characterized in that, The radially extending width of the plurality of baffles is 0.05 to 0.15 times the inner diameter of the main body portion.

7. The chemical reaction equipment according to claim 3, characterized in that, The height of the draft tube is greater than or equal to the height of the stirring assembly; and / or The inner diameter of the draft tube is greater than the outermost dimension of the multi-stage stirring assembly.

8. The chemical reaction device according to claim 3, characterized in that, The height of the draft tube is 0.3 to 0.7 times the height of the main body portion.

9. The chemical reaction equipment according to any one of claims 1 to 8, characterized in that, The chemical reaction equipment further includes a temperature regulation system around the outer periphery of the main body portion. The temperature regulation system sequentially includes a housing, a heat insulation layer, a jacket arranged between the heat insulation layer and the main body portion, and a heating element from outside to inside; Among them, the jacket has a hollow chamber, and the heating element is fixedly attached to the outer wall of the jacket and extends into the hollow chamber.

10. The chemical reaction equipment according to claim 9, characterized in that, The chemical reaction equipment further includes an automatic replenishment system; The automatic replenishment system includes a controller, a storage container communicated with the hollow chamber of the temperature regulation system, and a magnetic flap level gauge arranged on the side of the jacket and communicated with the hollow chamber of the jacket; Among them, the magnetic flap level gauge has a remote transmission level gauge and a level sensor arranged at the top, a pipeline communicating with the hollow chamber, and a valve arranged on the pipeline; and The level gauge, the level sensor, and the valve are communicatively connected to the controller.

11. The chemical reaction equipment according to claim 4, wherein, It further includes one or more feeding assemblies on the cover assembly; Among them, one of the feeding assemblies includes a vertical feeding pipe and a distributor horizontally communicated with the lower end of the feeding pipe.

12. The chemical reaction equipment according to claim 11, characterized in that, The distributor is a coil-type distributor with through holes.

13. The chemical reaction equipment according to claim 9, characterized in that, The chemical reaction equipment further includes a plurality of flow guiding plates horizontally arranged in the jacket.

14. The chemical reaction equipment according to claim 1, characterized in that, It includes at least one of the following features: Relative to the bottom surface of the accommodating cavity of the main body portion, the position of the upper stirring blade on the stirring shaft is within the section of 0.5 to 0.8 times the height of the accommodating cavity; Relative to the bottom surface of the accommodating cavity of the main body portion, the position of the middle frame-type stirring blade on the stirring shaft is within the section of 0.3 to 0.6 times the height of the accommodating cavity; Relative to the bottom surface of the accommodating cavity of the main body portion, the position of the lower stirring blade on the stirring shaft is within the section of 0.1 to 0.3 times the height of the accommodating cavity.

15. The chemical reaction equipment according to claim 1, characterized in that, The middle frame-type stirring blade includes a stirring blade and a connecting rod, and the stirring blade is detachably connected to the stirring shaft through the connecting rod.

16. The chemical reaction equipment according to claim 15, wherein, The total radial width of the middle frame-type stirring blade is 0.5 to 0.75 times the inner diameter of the accommodating cavity of the main body part.

17. The chemical reaction device according to claim 5, wherein The disk turbine-type stirring blade includes a disk at the center and a plurality of blades arranged on the periphery of the disk.

18. The chemical reaction device according to claim 17, characterized in that, The disk turbine-type stirring blade is an inclined-blade disk turbine-type stirring blade, and the plane where the blade is located has an included angle of 15 to 45° with the plane where the disk is located.

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