Continuous production device applied to pigmentation
By using a continuous pigment production device, which utilizes a multi-stage airlift circulating reactor and inert gas, the problems of numerous equipment, high energy consumption, and significant safety risks in intermittent stirred tank production have been solved, achieving efficient and low-consumption pigment production.
Patent Information
- Application Number
- CN202421642222.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-07-12
AI Technical Summary
The existing batch stirred tank pigment production has problems such as a large number of equipment sets, long operation time, low degree of automation, high energy consumption, high safety risks, and unstable product quality.
The pigmentation continuous production device uses a multi-stage airlift circulating reactor and inert gas as the circulating power, combined with steam or fresh gas, to achieve the circulating state of materials in the pigmentation tower, reduce shear stress, ensure crystal particle size uniformity and mass transfer effect, and reduce energy consumption.
It improves production efficiency, reduces operating costs and safety risks, achieves a higher degree of automation and lower energy consumption, and results in a more uniform particle size distribution in the product.
Smart Images
Figure CN223628125U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of applied in pigmentation continuous production device, belong to fine chemical technical field. BACKGROUND
[0002] Pigmentation is the trace solubility of pigment in specific solvent, dissolution and recrystallization occur in the treatment process, the particle size of the originally wide particle size distribution is narrowed, and part of the soluble impurities is removed by solvent solubility, and the particles are soft by the permeability of solvent. In this process, there can be a change in crystal form (from thermodynamic unstable form to stable form), and there can be crystal particle growth, thereby imparting high hiding power to the pigment.
[0003] Currently, batch stirred tank is mostly used in pigmentation process, for example, solvent method is used to treat a yellow pigment, and the production process is as follows: in the reaction kettle, 800L of DMF is added, then a wet filter cake of the yellow pigment (equivalent to 80kg of dry weight) is slowly added under stirring, heated to reflux, maintained for a certain time, and the end point of the process is determined according to the intensity and color phase. After the indexes such as intensity, color phase and hiding power are qualified by central control, it is sent to the next process for post-treatment.
[0004] The shear stress of stirred tank is large, which can cause the breakage, hardening and caking of crystals, so batch stirred tank is used for pigmentation, and the particle size distribution of the final product is not concentrated, which can exist a part of large particle size crystals or small particle size crystals to affect the indexes of the pigment.
[0005] The above batch production process has many problems such as many equipment sets, long operation time, low automation degree, high energy consumption, high safety risk of frequent repeated start and stop process, large influence of human factors on operation, unstable product quality and the like. UTILITY MODEL CONTENT
[0006] To solve the above technical problems, the utility model provides a kind of applied in pigmentation continuous production device, improves the automation degree of pigmentation production device, reduces energy consumption, reduces operating cost, personnel expense, simultaneously reduces the generation amount of three wastes, effectively improves production environment, realizes production process continuous by pigmentation continuous production device. Greatly reduce operating cost, and the device structure is simple, process is short, the automation degree is high, energy consumption is low, and it is safe to run.
[0007] The utility model adopts the following technical solutions: a kind of applied in pigmentation continuous production device, including feed buffer tank, feed pump, pigmentation tower, discharge pump, circulating gas compressor and the like.
[0008] The inlet of the feed buffer tank is connected with the outlet of the previous process, the outlet of the feed buffer tank is connected with the inlet of a feed pump, the outlet of the feed pump is connected with the inlet of a pigmentization tower material, the material outlet of the pigmentization tower is connected with the inlet of a discharge pump, the outlet of the discharge pump is connected with a pigmentization product pipe, the pigmentization product pipe is connected to the next process, the gas phase outlet of the pigmentization tower is divided into two streams, one of which is connected with the inlet of a circulating gas compressor, and the other is discharged to the outside, the gas phase inlet of the pigmentization tower is also divided into two streams, one of which is the circulating gas phase of the outlet of the circulating gas compressor, and the other is a fresh gas phase.
[0009] The pigmentization tower is a multi-stage gas-lift loop reactor, and the residence time in the pigmentization tower is the pigmentization time, so that the material has enough time to complete the dissolution and recrystallization process, and the internal part is two or more than two sections.
[0010] As a further improvement of the above scheme, the jacket of the pigmentization tower is supplied with a heating medium to ensure that the temperature of each section of the pigmentization tower is stable.
[0011] As a further improvement of the above scheme, the material inlet of the pigmentization tower is the upper section of the pigmentization tower or the lower section of the pigmentization tower, the material outlet of the pigmentization tower is the lower section of the pigmentization tower or the upper section of the pigmentization tower, and the position relationship between the material inlet and outlet of the pigmentization tower can be upper inlet and lower outlet or lower inlet and upper outlet.
[0012] As a further improvement of the above scheme, the gas phase inlet of the pigmentization tower is the lower section of the pigmentization tower, and the gas phase outlet is the top of the pigmentization tower.
[0013] As a further improvement of the above scheme, the fresh gas phase of the pigmentization tower can be nitrogen, air, argon, water vapor, solvent vapor or no gas phase supplement.
[0014] Compared with the prior art, the beneficial effects of the present application are as follows:
[0015] In the pigmentization continuous production process, steam is selected as the loop power, the solvent in the pigmentization tower is always in a boiling state, the temperature required for pigmentization is maintained, the material in the tower is always in a loop state, the shear stress is low, the collision of the crystals during pigmentization can be effectively reduced, the occurrence of secondary nucleation is inhibited, the crystal size is more uniform, the material in the loop state in the pigmentization tower can provide better mass transfer effect, the steam is heated and pressurized by the circulating gas compressor to realize internal circulation and save energy, and the operating cost is greatly reduced.
[0016] The utility model discloses a continuous production device for pigmenting, which belongs to the field of pigmenting technology.
[0017] Compared with the existing intermittent production process, the residence time of the continuous production device for pigmenting is shortened from about 5-20 hours to 1-5 hours, which greatly improves the production efficiency. The reduction of residence time makes the liquid holdup in the device lower than that in the kettle type device, and the safety risk is smaller. The operation cost is reduced. Moreover, the device for continuous production has simple structure, short process, high automation degree, low energy consumption and safe operation. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is a whole structure schematic view of the utility model;
[0019] Figure 2 It is a whole side structure schematic view of the utility model;
[0020] Figure 3 It is a pigmenting tower structure schematic view of the utility model;
[0021] Figure 4 It is a circulating gas compressor structure schematic view of the utility model;
[0022] Figure 5 It is a feeding buffer tank internal structure schematic view of the utility model.
[0023] Main symbol explanation:
[0024] 1, feeding buffer tank;2, feeding pump;3, pigmenting tower;301, tail gas pipe;4, circulating gas compressor;401, fresh gas phase;402, circulating gas phase;5, discharge pump;501, pigmenting product pipe. DETAILED DESCRIPTION
[0025] In the following, the utility model is further described in combination with the drawings and specific embodiments. It should be noted that the following described embodiments or technical features can be combined to form new embodiments without conflict.
[0026] Embodiment:
[0027] Please combine Figures 1-5The embodiment is applied to a pigmentization continuous production device, which comprises a feed buffer tank 1, a feed pump 2, a pigmentization tower 3, a discharge pump 5, a circulating gas compressor 4 and the like.
[0028] The inlet of the feed buffer tank 1 is connected with the outlet of a previous process, the outlet of the feed buffer tank 1 is connected with the inlet of the feed pump 2, the outlet of the feed pump 2 is connected with the inlet of the pigmentization tower 3, the material outlet of the pigmentization tower 3 is connected with the inlet of the discharge pump 5, the outlet of the discharge pump 5 is connected with a pigmentization product pipe 501, the pigmentization product pipe 501 is connected to a subsequent process, the gas phase outlet of the pigmentization tower 3 is divided into two streams, one of which is connected with the inlet of the circulating gas compressor 4, and the other is discharged to the outside, the gas phase inlet of the pigmentization tower 3 is divided into two streams, one of which is the circulating gas phase 402 of the outlet of the circulating gas compressor 4, and the other is the fresh gas phase 401.
[0029] The pigmentization tower is a multi-stage gas-lift loop reactor, the residence time in the pigmentization tower is the pigmentization time, and the residence time ensures that the material has a suitable time to complete the dissolution and recrystallization process, and the internal part is two sections or more than two sections.
[0030] The jacket of the pigmentization tower 3 is connected with a heating medium to ensure that the temperature of each section of the pigmentization tower 3 is stable.
[0031] The material inlet of the pigmentization tower 3 is the upper section of the pigmentization tower 3 or the lower section of the pigmentization tower 3, the material outlet of the pigmentization tower 3 is the lower section of the pigmentization tower 3 or the upper section of the pigmentization tower 3, and the position relationship between the material inlet and the material outlet of the pigmentization tower 3 can be upper inlet and lower outlet or lower inlet and upper outlet.
[0032] The gas phase inlet of the pigmentization tower 3 is the lower section of the pigmentization tower 3, and the gas phase outlet is the top of the pigmentization tower 3.
[0033] The fresh gas phase 401 of the pigmentization tower 3 can be nitrogen, air, argon, water vapor, solvent vapor or no gas phase supplement.
[0034] The embodiment of the application is applied to a pigmentization continuous production device, which comprises a feed buffer tank 1, a feed pump 2, a pigmentization tower 3, a discharge pump 5, a circulating gas compressor 4 and the like.
[0035] The red pigment material treated in the previous process is temporarily stored in the feed buffer tank 1, the red pigment material is continuously pumped into the upper section of the pigmentation tower 3 at a flow rate of 100 kg / h (including solvent) through the feed pump 2, 0.3 MPa G low-pressure steam enters from the gas phase inlet of the pigmentation tower 3, and the whole tower material is kept in a boiling state, the top gas phase outlet of the pigmentation tower 3 is steam, which is returned to the pigmentation tower 3 after being warmed and pressurized by the circulating gas compressor 4, the pressure at the top of the pigmentation tower 3 is controlled to be 120 kPa A, the top temperature is controlled to be a boiling state by controlling the flow rate of the circulating gas phase 402 and the flow rate of the fresh steam, and the pressure is controlled by the regulating valve of the tail gas pipe 301, the red pigment completes the dissolution and recrystallization process in the pigmentation tower 3, and is continuously taken out from the bottom material outlet of the pigmentation tower 3 to the next process through the pigmentation product pipe 501 by the discharge pump 5.
[0036] In this embodiment, the pigmentation residence time is reduced from 11 h of the workshop batch production to 4 h, and the product particle size is more concentrated than that of the workshop batch process, and there is basically no particle distribution above 10.0 μm.
[0037] Example 2
[0038] Taking the continuous production of a certain purple pigment as an example, the treatment capacity of the certain purple pigment is 75 t / a (dry basis), and the annual operating time is 7200 h. The specific process flow is as follows:
[0039] The purple pigment material treated in the previous process is temporarily stored in the feed buffer tank 1, the purple pigment material is continuously pumped into the upper section of the pigmentation tower 3 at a flow rate of 100 kg / h (including solvent) through the feed pump 2, fresh nitrogen enters from the gas phase inlet of the pigmentation tower 3, provides the circulating power of the material in the pigmentation tower 3, the top gas phase outlet of the pigmentation tower 3 is nitrogen, which is returned to the pigmentation tower 3 after being pressurized by the circulating gas compressor 4, the pressure at the top of the pigmentation tower 3 is controlled to be 250 kPa A, the temperature in the tower is maintained at 120°C, and the pressure is controlled by the regulating valve of the tail gas pipe 301 and the regulating valve of the fresh gas phase 401, the purple pigment completes the dissolution and recrystallization process in the pigmentation tower 3, and is continuously taken out from the bottom material outlet of the pigmentation tower 3 to the next process through the pigmentation product pipe 501 by the discharge pump 5.
[0040] In this embodiment, the pigmentation residence time is reduced from 11 h of the workshop batch production to 3 h, and the product particle size is more concentrated than that of the workshop batch process.
[0041] Example 3
[0042] Taking the continuous production of a certain blue pigment as an example, the treatment capacity of the certain blue pigment is 200 t / a (dry basis), and the annual operating time is 7200 h. The specific process flow is as follows:
[0043] A certain blue pigment raw material from outside the boundary is temporarily stored in the feed buffer tank 1, and the certain blue pigment raw material is continuously pumped into the pigmentation tower 3 at a flow rate of 140 kg / h (including solvent) through the feed pump 2, fresh nitrogen enters from the gas phase inlet of the pigmentation tower 3, provides the circulating power of the material in the pigmentation tower 3, the nitrogen gas at the top of the pigmentation tower 3 is returned to the pigmentation tower 3 after being pressurized by the circulating gas compressor 4, the pressure at the top of the pigmentation tower 3 is controlled to be 120 kPaA, the temperature in the tower is maintained at 65 DEG C, and the pressure is controlled by the regulating valve of the tail gas pipe 301 and the regulating valve of the fresh gas phase 401, the certain blue pigment completes the dissolution and recrystallization process in the pigmentation tower 3, and is continuously taken out to the next process through the pigmentation product pipe 501 from the material outlet at the bottom of the pigmentation tower 3 through the discharge pump 5.
[0044] In the embodiment, the pigmentation residence time is reduced from 5h of the workshop intermittent production to 1h of cooling, and the product particle size is more concentrated than the particle size of the workshop intermittent process.
[0045] Example 4
[0046] Taking the continuous production of a certain green pigment as an example, the treatment capacity is 100t / a of a certain green pigment (dry basis), the annual operation time is 7200h, and the specific process flow is as follows:
[0047] The certain green pigment raw material treated in the previous process is temporarily stored in the feed buffer tank 1, the certain green pigment raw material is continuously pumped into the lower section of the pigmentation tower 3 at a flow rate of 230 kg / h (including solvent) through the feed pump 2, fresh nitrogen enters from the gas phase inlet of the pigmentation tower 3, provides the circulating power of the material in the pigmentation tower 3, the nitrogen gas at the top of the pigmentation tower 3 is returned to the pigmentation tower 3 after being pressurized by the circulating gas compressor 4, the pressure at the top of the pigmentation tower 3 is controlled to be 450 kPaA, the temperature in the tower is maintained at 140 DEG C, and the pressure is controlled by the regulating valve of the tail gas pipe 301 and the regulating valve of the fresh gas phase 401, the certain green pigment completes the dissolution and recrystallization process in the pigmentation tower 3, and is continuously taken out to the next process through the pigmentation product pipe 501 from the material outlet at the bottom of the pigmentation tower 3 through the discharge pump 5.
[0048] In the embodiment, the pigmentation residence time is reduced from 5h of the workshop intermittent production to 1h of cooling, and the product particle size is more concentrated than the particle size of the workshop intermittent process.
[0049] The above-mentioned embodiments are only preferred embodiments of the utility model, and cannot be used to limit the range of protection of the utility model, and any non-substantial changes and replacements made by the person skilled in the art on the basis of the utility model all belong to the range of protection required by the utility model.
Claims
1. An application to a pigmentation continuous production device, characterized by, It comprises: a feed buffer tank (1), a feed pump (2), a pigmenting tower (3), a discharge pump (5), a circulating gas compressor (4), the inlet of the feed buffer tank (1) is connected with the outlet of the previous process, the outlet of the feed buffer tank (1) is connected with the inlet of the feed pump (2), the outlet of the feed pump (2) is connected with the material inlet of the pigmenting tower (3), the material outlet of the pigmenting tower (3) is connected with the inlet of the discharge pump (5), the outlet of the discharge pump (5) is connected with a pigmenting product pipe (501), the pigmenting product pipe (501) is connected to the next process, the gas phase outlet of the pigmenting tower (3) is divided into two streams, one of which is connected with the inlet of the circulating gas compressor (4), and the other is discharged outside, the gas phase inlet of the pigmenting tower (3) is divided into two streams, one of which is the circulating gas phase (402) of the outlet of the circulating gas compressor (4), and the other is the fresh gas phase (401).
2. A process according to claim 1, characterized in that: The pigmenting tower (3) adopts a multi-stage gas-lift loop reactor, and the internal parts are two or more than two.
3. A process for applying pigments to a continuous production device as claimed in claim 1, characterized in that: The jacket of the pigmenting tower (3) is connected with a heating medium to ensure the temperature stability of each section of the pigmenting tower (3).
4. A process according to claim 1, characterized in that: The material inlet of the pigmenting tower (3) is the upper section of the pigmenting tower (3) or the lower section of the pigmenting tower (3), the material outlet of the pigmenting tower (3) is the lower section of the pigmenting tower (3) or the upper section of the pigmenting tower (3), and the position relationship of the material inlet and outlet of the pigmenting tower (3) can be upper inlet and lower outlet, or lower inlet and upper outlet.
5. A process according to claim 1, characterized in that: The gas phase inlet of the pigmenting tower (3) is the lower section of the pigmenting tower (3), and the gas phase outlet is the top of the pigmenting tower (3).
6. A process according to claim 1, characterized in that: The fresh gas phase (401) of the pigmenting tower (3) can be nitrogen, air, argon, water vapor, solvent vapor or no gas phase supplement.