Continuous synthesis equipment for pigment

Abstract

The utility model provides continuous pigment synthesis equipment, which comprises a reaction kettle, a motor and a stirring shaft, the stirring shaft comprises a main shaft connected with the output end of the motor, a hollow pipe positioned in the kettle body of the reaction kettle and connected with the main shaft, and stirring blades arranged on the side wall of the hollow pipe, the extension pipe is arranged at the end, far away from the main shaft, of the hollow pipe, and the open hole is formed in the pipe wall of the extension pipe; a gas supply device is arranged outside the reaction kettle, and gas output by the gas supply device is conveyed to the extension pipe through the hollow pipe and is discharged from the hole. According to the reaction kettle, low-temperature gas is input into the reaction kettle through the stirring shaft, so that the cooling effect is realized, and the aim of improving the stirring effect is fulfilled. The thermal stress generated by the low-temperature gas is smaller, the loss of equipment is lower, and the reaction process of the system is hardly influenced by the introduction of the gas, so that the condition control is more facilitated, and the product quality is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pigment production equipment technical field, concretely relates to a continuous synthesis equipment of pigment. BACKGROUND

[0002] The preparation of general organic pigment is composed of diazotization reaction and coupling reaction, in the diazotization reaction, diazonium salt is easy to decompose under high temperature, and the preparation of diazonium salt is a heat release reaction, so the requirement of heat transfer in the production process is quite high, the diazotization is generally used kettle type reactor intermittent operation, when reacting, the crushed ice or frozen brine is directly added in the reaction kettle to control the reaction temperature and realize the cooling. However, the area with the highest temperature is the center of the reaction kettle, and the crushed ice or frozen brine is generally located in the periphery of the reaction kettle, so the cooling effect is not ideal, and the addition of crushed ice or frozen brine will affect the solubility and dispersibility of pigment, which is difficult to adjust in time.

[0003] The file with application number 202320384807.4 discloses a continuous synthesis equipment of pigment with cooling system, the top of the reaction kettle is provided with a power part, a rotating shaft is installed on the power part, the end of the rotating shaft away from the power part is inserted into the reaction kettle, a stirring blade is fixedly arranged at the end of the rotating shaft inserted into the reaction kettle, the rotating shaft is a hollow shaft, and the rotating shaft is connected with and communicated with a water inlet pipe.

[0004] However, the device still has the following problems: although the device transports the cooling water to the center of the kettle body of the reaction kettle, the problem of affecting the solubility and dispersibility of pigment is still difficult to solve. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the utility model aims at providing a continuous synthesis equipment of pigment, which realizes the effect of cooling and improves the stirring effect by inputting low-temperature gas into the reaction kettle through the stirring shaft. The heat stress generated by the low-temperature gas is smaller, the equipment loss is lower, and the input of gas has little effect on the reaction process of the system, which is more conducive to the control of conditions and ensures the quality of products.

[0006] In order to realize the above purpose, the technical scheme of the utility model is as follows:

[0007] A continuous synthesis device of pigments comprises a reaction kettle, a motor arranged at the upper end of the reaction kettle, and a stirring shaft, wherein the stirring shaft comprises a main shaft connected with the output end of the motor, a hollow pipe arranged in the kettle body of the reaction kettle and connected with the main shaft, stirring blades arranged on the side wall of the hollow pipe, an extension pipe arranged on the end of the hollow pipe away from the main shaft, and an opening arranged on the pipe wall of the extension pipe; a gas feeding device is arranged outside the reaction kettle, and the gas output by the gas feeding device is conveyed to the extension pipe through the hollow pipe and discharged from the opening.

[0008] As a further preferred embodiment of the present application, the extension pipe comprises a connecting pipe inserted into the hollow pipe, and an exhaust pipe arranged on the end of the connecting pipe outside the hollow pipe and extending towards the inner wall of the kettle body of the reaction kettle; the opening is arranged on the pipe wall of the exhaust pipe.

[0009] As a further preferred embodiment of the present application, the opening is arranged on the pipe wall of the exhaust pipe close to the bottom surface of the kettle body of the reaction kettle.

[0010] As a further preferred embodiment of the present application, the end of the exhaust pipe away from the connecting pipe is provided with a gas nozzle with an opening facing away from the bottom surface of the kettle body of the reaction kettle.

[0011] As a further preferred embodiment of the present application, an inner connecting thread is arranged on the inner wall of the hollow pipe, and an outer connecting thread matching the inner connecting thread is arranged on the outer wall of the connecting pipe.

[0012] As a further preferred embodiment of the present application, a plurality of holes are arranged on the pipe wall of the hollow pipe; and when the connecting pipe is inserted into the hollow pipe to the maximum depth, the connecting pipe closes all the holes.

[0013] As a further preferred embodiment of the present application, the end of the hollow pipe is detachably connected with a plug.

[0014] As a further preferred embodiment of the present application, the plug comprises a fixing column inserted into the hollow pipe, and a plug block arranged on the end of the fixing column outside the hollow pipe.

[0015] As a further preferred embodiment of the present application, the exhaust pipe is a corrugated pipe or a telescopic sleeve.

[0016] As a further preferred embodiment of the present application, the bottom of the reaction kettle is provided with a discharge port, and the diameter of the discharge port is greater than the minimum length of the exhaust pipe or twice the minimum length of the exhaust pipe.

[0017] The present application has the following beneficial effects:

[0018] The continuous synthesis equipment provided by the utility model can not only meet the requirement of passing low-temperature gas into the equipment to effectively and accurately control the reaction temperature, but also can realize the scheme of passing conventional ice blocks or frozen brine into the equipment, and the two share one equipment, switching is flexible, and the utility model has the advantages of good practicability and simple operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0020] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is an internal structure schematic view of the utility model.

[0021] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is a structure schematic view of the extension pipe under the angle of view of the utility model.

[0022] BRIEF DESCRIPTION OF DRAWINGS Figure 4 It is another structure schematic view of the extension pipe under the angle of view of the utility model.

[0023] BRIEF DESCRIPTION OF DRAWINGS Figure 5 It is a local schematic view of the connection place of the hollow pipe and the extension pipe in the utility model.

[0024] BRIEF DESCRIPTION OF DRAWINGS Figure 6 It is a local schematic view of the connection place of the hollow pipe and the plug in the utility model.

[0025] BRIEF DESCRIPTION OF DRAWINGS: reaction kettle 11, motor 12, feed inlet 13, connecting sleeve pipe 14, supporting leg 15;

[0026] Main shaft 21, hollow pipe 22, stirring blade 23, extension pipe 24, opening 25, hole body 26, plug 27;

[0027] Connecting pipe 241, exhaust pipe 242, air nozzle 243;

[0028] Fixed column 271, plug 272. DETAILED DESCRIPTION

[0029] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right" and the like is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship commonly placed when the product of the utility model is used, or is the orientation or position relationship commonly understood by the person skilled in the art, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated equipment or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0030] In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance

[0031] In the description of the utility model, it also needs to be explained that, unless there is explicit provision and limitation, the terms such as "arrange" and "connect" should be understood broadly, for example, "connect" can be fixedly connected, can be detachably connected, or integrally connected: can be mechanically connected, can be electrically connected: can be directly connected, can be indirectly connected through intermediate medium, can be the intercommunication of two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0032] The continuous synthesis equipment for pigments provided by the utility model is mainly used for the preparation of organic pigments, taking pigment red 169 produced by the applicant as an example, the equipment is mainly applied to the mixing reaction of raw materials, and the mixing reaction process basically includes: firstly mixing copper sulfate solution and sodium sulfite-potassium ferrocyanide solution, then mixing with matrix dye solution, preparing pigment suspension, adding surfactant into the pigment suspension and mixing, and finally obtaining pigment red 169.In the process, the mixing of copper sulfate solution and sodium sulfite-potassium ferrocyanide solution and the mixing of matrix dye solution occur diazotization reaction, which is an exothermic reaction, if the temperature is too high (higher than 5 DEG C), decomposition, increase of by-products and other problems will be caused, affecting the purity and quality of the product.In addition, the process of passing in gas is preferred during mixing, the purpose is to assist in improving the stirring effect, achieving the purpose of improving the dispersibility, and finally improving the quality of the product.

[0033] The continuous synthesis equipment provided by the utility model aims to realize the feeding of low-temperature gas into the equipment, which realizes the effect of temperature reduction and the purpose of improving the stirring effect.Compared with directly passing in ice blocks or cold brine, the thermal stress generated by low-temperature gas is smaller, and the loss of the equipment is lower.More importantly, as long as the low-temperature gas is selected from the gas (such as inert gas) that does not participate in the reaction, the feeding of the gas has little effect on the reaction process of the system, which is more conducive to the control of conditions and ensures the quality of the product.

[0034] It can be understood that the mode of passing in low-temperature gas, especially the scheme of selecting inert gas, has high cost, therefore, the device still needs to meet the requirement of the economic scheme of using ice blocks or frozen brine.

[0035] In summary, the continuous synthesis equipment provided by the utility model can meet the requirement of feeding low-temperature gas into the equipment to effectively and accurately control the reaction temperature, and can also realize the scheme of feeding conventional ice blocks or frozen brine into the equipment, and the two share one equipment, the switching is flexible, and the device has the advantages of good practicability and simple operation.

[0036] The continuous synthesis equipment provided by the utility model basically includes:

[0037] The reaction kettle 11 comprises a kettle body and a top cover detachably connected with the kettle body, the top cover is provided with a feeding port 13 (1-3 in number), the lower end center of the kettle body is provided with a discharging port for discharging materials, and the lower end of the kettle body is provided with a supporting leg 15, and a plurality of spaced apart fins can be installed on the outer wall of the kettle body to improve the heat transfer speed and thus achieve the effect of cooling;

[0038] The motor 12 and the stirring shaft, the motor 12 is arranged at the upper end of the reaction kettle 11, specifically mounted at the center of the top cover, the lower end of the stirring shaft extends to the inner bottom surface of the kettle body, rotates under the driving of the motor 12, and plays the effect of stirring, and the stirring shaft is further provided with stirring blades 23 to improve the stirring effect.

[0039] Further, in order to realize the effect of conveying low-temperature gas, the equipment is mainly improved in structure at the stirring shaft, specifically as follows: the stirring shaft comprises a main shaft 21 connected with the output end of the motor 12, a hollow pipe 22 located in the kettle body of the reaction kettle 11 and connected with the main shaft 21, an extension pipe 24 arranged on the end of the hollow pipe 22 away from the main shaft 21, and an opening 25 arranged on the pipe wall of the extension pipe 24; a gas feeding device is arranged outside the reaction kettle 11, and the gas output by the gas feeding device is conveyed to the extension pipe 24 through the hollow pipe 22 and discharged from the opening 25.

[0040] The main shaft 21 is a solid shaft body, and a connecting sleeve 14 should be arranged at the connection between the main shaft 21 and the hollow pipe 22, the connecting sleeve 14 is used to realize the fixed connection with the gas conveying pipe of the gas feeding device and the rotating connection with the main shaft 21 and the hollow pipe 22, so as to avoid the problem that the gas conveying pipe of the gas feeding device is twisted when the motor 12 drives the main shaft 21 and the hollow pipe 22 to rotate. The specific structure of the connecting sleeve 14 is a known technology to those skilled in the art, such as the sleeve ring disclosed in the document with the authorization announcement number CN219559571U, so this embodiment will not be described again.

[0041] The purpose of the extension pipe 24 is to redistribute the gas to ensure that it can be quickly and uniformly discharged from the bottom of the kettle body to play the effect of uniform cooling, and due to the factors of the density of the gas and the temperature difference between the gas and the liquid, the low-temperature gas entering from the bottom will push the hot liquid to flow upward to form convection while heat exchange is carried out, and the low-temperature gas will also have irregular movements such as agglomeration and rupture, thereby causing disturbances at various positions in the liquid and improving the stirring effect. It should be noted that the inlet of the gas may cause the pressure in the reaction kettle to change, and pressure monitoring instruments and pressure relief valves need to be provided, which is a conventional choice in the art, so this embodiment will not be described again.

[0042] It can be understood that the gas feeding device is a device for feeding low-temperature gas to the hollow pipe 22, and any prior art device capable of achieving this function can be used, and thus will not be described in detail.

[0043] As some preferred embodiments, the extension pipe 24 comprises a connecting pipe 241 inserted into the hollow pipe 22, and an exhaust pipe 242 arranged on the end of the connecting pipe 241 outside the hollow pipe 22 and extending towards the inner wall of the kettle body of the reaction kettle 11; the opening 25 is arranged on the pipe wall of the exhaust pipe 242. The advantage of such an arrangement is that the extension pipe 24 and the hollow pipe 22 can be detachably arranged, which facilitates disassembly and maintenance, and also facilitates replacement of the extension pipe 24 with different opening sizes, lengths, and diameters to achieve different cooling effects and auxiliary stirring effects. As a preferred arrangement, an inner connecting thread is arranged on the inner wall of the hollow pipe 22, and an outer connecting thread matching the inner connecting thread is arranged on the outer wall of the connecting pipe 241. The threaded connection facilitates improved sealing of the connection between the two pipes and ensures effective gas transmission.

[0044] Further, the opening 25 is arranged on the pipe wall of the exhaust pipe 242 close to the bottom surface of the kettle body of the reaction kettle 11. The advantage of such an arrangement is that it avoids blockage of the opening by suspended matter in the liquid and ensures efficient exhaust.

[0045] As some preferred embodiments, the exhaust pipe 242 has a gas nozzle 243 with an opening facing away from the bottom surface of the kettle body of the reaction kettle 11 on the end of the exhaust pipe 242 away from the connecting pipe 241. The advantage of such an arrangement is that it can improve the flow rate of the extension pipe 24 to achieve rapid cooling.

[0046] In other embodiments, when a scheme of feeding frozen brine instead of gas is used, a hole body 26 is arranged on the pipe wall of the hollow pipe 22. This can ensure that when the extension pipe 24 is not installed, the frozen brine can be directly discharged from the hole body 26 of the hollow pipe 22, reducing the transportation distance and improving the cooling efficiency. Further preferably, a plug 27 is detachably connected to the end of the hollow pipe 22, and the plug 27 comprises a fixing column 271 inserted into the hollow pipe 22, and a plug block 272 arranged on the end of the fixing column 271 outside the hollow pipe 22. The fixing column 271 is preferably an external thread column to achieve a tight connection with the hollow pipe 22, and the plug block 272 has a diameter greater than that of the hollow pipe 22 and cooperates with the fixing column 271 to achieve a plugging effect. The purpose of such an arrangement is to prevent raw materials from entering the hollow pipe 22 and contaminating the pipe body.

[0047] It is further noted that, in order to avoid gas leakage, when gas cooling is switched on again, the height of the hole body 26 should be ensured to be able to close all the hole bodies 26 when the connecting pipe 241 is inserted into the hollow pipe 22 to the maximum depth.

[0048] Furthermore, the exhaust pipe 242 is a bellows or an elastic sleeve, and the diameter of the discharge port is greater than the minimum length of the exhaust pipe 242 or twice the minimum length of the exhaust pipe 242. Such arrangement can achieve the purpose of adjustable length of the exhaust pipe 242, facilitate the adjustment of the gas conveying process, and when the exhaust pipe 242 is shortened to the minimum, it can be directly removed from the discharge port at the bottom of the reaction kettle, improving the convenience of replacement and maintenance.

[0049] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

Claims

1. A continuous synthesis apparatus of pigments comprising a reactor (11), a motor (12) arranged at the upper end of said reactor (11) and a stirring shaft, characterized in that: The stirring shaft comprises a main shaft (21) connected with the output end of the motor (12), a hollow tube (22) located in the kettle body of the reaction kettle (11) and connected with the main shaft (21), stirring blades (23) arranged on the side wall of the hollow tube (22), an extension tube (24) arranged on the end of the hollow tube (22) away from the main shaft (21), and an opening (25) arranged on the tube wall of the extension tube (24); a gas feeding device is arranged outside the reaction kettle (11), and the gas output by the gas feeding device is delivered to the extension tube (24) through the hollow tube (22) and discharged from the opening (25).

2. A continuous apparatus for the synthesis of pigments according to claim 1, characterized in that: The extension tube (24) comprises a connecting tube (241) inserted into the hollow tube (22), and an exhaust tube (242) arranged on the end of the connecting tube (241) outside the hollow tube (22) and extending to the inner wall of the kettle body of the reaction kettle (11); the opening (25) is arranged on the tube wall of the exhaust tube (242).

3. A continuous apparatus for the synthesis of pigments according to claim 2, characterized in that: The opening (25) is arranged on the tube wall of the exhaust tube (242) close to the bottom surface of the kettle body of the reaction kettle (11).

4. A continuous apparatus for the synthesis of pigments according to any of claims 2 or 3, characterized in that: The exhaust tube (242) has a gas nozzle (243) with an opening away from the bottom surface of the kettle body of the reaction kettle (11) on the end thereof away from the connecting tube (241).

5. A continuous apparatus for synthesizing pigments according to claim 2, characterized in that: An inner connecting thread is arranged on the inner wall of the hollow tube (22), and an outer connecting thread matched with the inner connecting thread is arranged on the outer wall of the connecting tube (241).

6. A continuous apparatus for the synthesis of pigments according to claim 2, characterized by the fact that: Hole bodies (26) are arranged on the tube wall of the hollow tube (22); and when the connecting tube (241) is inserted into the hollow tube (22) to the maximum depth, the connecting tube (241) closes all the hole bodies (26).

7. A continuous apparatus for the synthesis of pigments according to claim 6, characterized in that: A plug (27) is detachably connected to the end of the hollow tube (22).

8. A continuous synthesis apparatus for pigments according to claim 7, characterized in that: The plug (27) comprises a fixing column (271) inserted into the hollow tube (22), and a plug block (272) arranged on the end of the fixing column (271) outside the hollow tube (22).

9. A continuous apparatus for the synthesis of pigments according to any of claims 2 or 3, characterized by the fact that: The exhaust tube (242) is a bellows or an elastic sleeve.

10. A continuous apparatus for the synthesis of pigments according to claim 9, characterized in that: A discharge port is arranged at the bottom of the reaction kettle (11), and the diameter of the discharge port is greater than the minimum length of the exhaust tube (242) or twice the minimum length of the exhaust tube (242).

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