Automatic oleamide preparation production line and control system

Abstract

The invention relates to the technical field of oleamide preparation, in particular to an automatic oleamide preparation production line and a control system.The automatic oleamide preparation production line comprises a reaction kettle used for performing oleamide preparation reaction; the mixing tank is communicated with the reaction kettle and is used for uniformly mixing an oleamide solution; the solvent tank is used for storing a solvent of the oleamide solution, and the solvent tank is communicated with the mixing tank and conveys the solvent into the mixing tank; a heating structure is arranged in the solvent tank to heat the solvent; the distillation tower is communicated with the mixing tank and is used for distilling the oleamide solution; the cooling tank is communicated with the distillation tower and is used for cooling and crystallizing the oleamide liquid. The method has the effect of ensuring the performance of the oleamide crystal product.

Description

Technical Field

[0001] The present application relates to the field of oleic acid amide preparation technology, and in particular to an automated oleic acid amide preparation production line and control system. Background Art

[0002] Oleic acid amide is an unsaturated fatty amide, a white crystalline or granular solid, which has a wide range of uses in industry. For example, it can be used as a lubricant in the processing of polyethylene films, reduce the melt viscosity of resin particles, and improve fluidity. It can also be used as a release agent for polyolefin injection molding to increase production and improve the surface gloss of products.

[0003] Commonly, the industrial preparation of oleamide relies on the high-temperature reaction of oleic acid and anhydrous ammonia, followed by condensation and crystallization. For example, there is a patent application for an oleamide production line and a production method thereof with application number CN116672982A, in which high-purity oleamide is prepared and purified by condensation and recrystallization. Specifically, the application document discloses that a spiral plate is provided in the condenser, and the spiral plate allows the oleamide solution to circulate with the cooling medium, so that the oleamide solution is cooled and crystallized while flowing along the spiral plate, and finally the crystallized oleamide is shoveled off by a collecting block on the spiral plate.

[0004] With respect to the relevant technologies in the above-mentioned application documents, the scraping method for taking materials can easily cause solid oleamide powder to adhere to the spiral plate and dissolve in the subsequent oleamide solution, affecting the particle size distribution and particle structure of the oleamide solution crystals, and further affecting the performance of the oleamide product. Therefore, structural improvements can be made to the production equipment to ensure the performance of the oleamide crystal product.

[0005] Application Contents In order to ensure the performance of oleic acid amide crystal products, the present invention provides an automated oleic acid amide preparation production line and a control system.

[0006] On the one hand, the present invention provides an automated oleamide preparation production line adopting the following technical solution: An automated oleamide preparation production line includes a reactor for carrying out a preparation reaction of oleamide, and further includes: A mixing tank, connected to the reactor, for mixing the oleamide solution; A solvent tank for storing the solvent of the oleamide solution, the solvent tank being connected to the mixing tank to transport the solvent to the mixing tank; a heating structure is provided in the solvent tank to heat the solvent; A distillation tower, connected to the mixing tank, for distilling the oleamide solution; A cooling tank is connected to the distillation tower and is used for cooling and crystallizing the oleamide liquid.

[0007] By adopting the above technical solution, the reaction kettle, the mixing tank, the solvent tank, the distillation tower, and the cooling tank together constitute the production line of oleic acid amide in the above solution. The preparation of oleic acid amide in the above solution adopts the method of crystallization after distillation, which is different from the existing preparation method of cooling crystallization, and the preparation concentration of oleic acid amide is improved by distillation; The reactor is the starting point for the preparation of oleic acid amide in the production line. The preparation of oleic acid amide is carried out in the reactor. Anhydrous ammonia and oleic acid are selected to undergo acylation reaction under the catalysis of a catalyst to generate oleic acid ammonium salt. The oleic acid ammonium salt is dehydrated at high temperature to generate oleic acid amide and water. In order to simultaneously achieve the dehydration of oleic acid ammonium salt, the reaction condition in the reactor needs to be high temperature. In practical applications, the temperature in the reactor is generally above 200°C, and the pressure is increased to 20 times the normal pressure, i.e. 2MPa, and a single reaction takes 2-6 hours. The initial purity of oleic acid amide prepared by the acylation reaction in the reactor is not high, so it should be purified to obtain the final high-purity (not less than 98% concentration) oleic acid amide. Therefore, in order to purify, a distillation method should be used. Specifically, the oleic acid amide initially prepared in the reactor is dissolved in a solvent to form an oleic acid amide solution, and then the excess components are distilled out through a distillation tower to obtain oleic acid amide with higher purity; The solvent tank stores the solvent used to dissolve oleic acid amide before the distillation process. An ethanol solution is usually selected. Ideally, 1 mg of oleic acid amide requires 3.55 mL of ethanol to dissolve. A 50% ethanol solution can be selected as the solvent of oleic acid amide. In order to improve the dissolving effect of the ethanol solution on oleic acid amide, the ethanol solution should be appropriately heated, preferably to 70°C. Therefore, a heating structure needs to be set in the solvent tank to heat the ethanol solution. The oleic acid amide prepared in the reactor is transported to a mixing tank and mixed with the above-mentioned 70° C. ethanol solution to dissolve the oleic acid amide. The ethanol solution and oleic acid amide are mixed in the mixing tank and temporarily stored to wait for the subsequent distillation process; The mixed oleamide solution in the mixing tank is transported to the distillation tower in batches for distillation. In order to reduce the operating cost of the distillation process, considering that the evaporation temperature of ethanol and water is not high, the distillation tower can maintain normal pressure. The boiling point of ethanol is 73°C, the boiling point of water is 100°C, and the boiling point of oleamide is about 440°C. Therefore, the distillation tower can be maintained at about 400 degrees Celsius to remove the impurities included in the oleamide directly produced by the acylation reaction by distillation in the traditional scheme. The impurities include incompletely reacted oleic acid and trace amounts of anhydrous ammonia. The boiling point of anhydrous ammonia is low, and the residual trace amount can be ignored. The boiling point of oleic acid is 360 degrees Celsius. Therefore, the high temperature of 400 degrees Celsius in the distillation tower can remove most of the impurities, which is sufficient for the production of oleamide with a standard purity of 99%. In the prior art, a high temperature of 400 degrees Celsius is very easy to achieve; The oleamide distilled in the distillation tower is transported to a cooling tank for cooling and crystallization, thereby completing the production and preparation of a single batch of oleamide crystals.

[0008] Optionally, the heating structure of the solvent tank is connected to the top of the distillation tower and the top of the reactor.

[0009] By adopting the above technical solution, the heating structure of the solvent tank is used to heat the ethanol solution in the solvent tank. Since the preset temperature requirement of the ethanol solution is 70 degrees Celsius, the internal high-temperature hot air of the distillation tower and the reactor is reused and transported to the heating structure of the solvent tank when the heating temperature is not very high, thereby saving a lot of heating energy by utilizing heat exchange.

[0010] Optionally, also include: The distillation tank is arranged between the distillation tower and the cooling tank, is connected with the distillation tower and the cooling tank, and is used for secondary distillation of the oleamide solution.

[0011] By adopting the above technical scheme, the distillation tank performs secondary distillation on the oleamide after distillation in the distillation tower to ensure the distillation purity. However, after the high-temperature distillation in the distillation tower, the purity of oleamide can reach the standard. Therefore, the secondary distillation temperature inside the distillation tank does not need to be too high, 120 degrees Celsius is sufficient, and the remaining water and ethanol in the oleamide solution after the first distillation are evaporated to ensure the purity of oleamide.

[0012] Optionally, also include: The normal temperature tank is arranged between the distillation tank and the cooling tank to cool the oleamide liquid at normal temperature.

[0013] By adopting the above technical solution, the normal temperature tank provides a normal temperature cooling method during the cooling process of the high-temperature oleic acid amide after the secondary distillation, thereby avoiding the large temperature difference of the oleic acid amide cooling and the excessive temperature drop rate affecting the distribution structure of the oleic acid amide particle crystals, thereby affecting the physical properties; No external cooling force is applied in the normal temperature tank, that is, when the high-temperature oleamide liquid is in the normal temperature tank, it is cooled naturally, or normal temperature water is applied to cool it by heat exchange.

[0014] Optionally, the distillation tank is connected to the heating structure of the solvent tank.

[0015] By adopting the above technical solution, the heating structure is connected to the distillation tank, and the temperature of the hot air in the distillation tank is used to improve the utilization rate of thermal energy. The temperature of the hot air in the distillation tank is lower than the temperature in the distillation tower and the reactor. The temperature inside the solvent tank can be controlled within a rough range by controlling the flow rate ratio of the hot air in the distillation tower, the distillation tank and the reactor.

[0016] On the other hand, the control system of an automated oleamide preparation production line provided by the present invention adopts the following technical solution: A control system for an automated oleamide production line, characterized in that it includes a system calculation module, a parameter metering module, a front-end control module, and a data display module; The parameter metering module is integrated in the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank, and measures the temperature value, pressure value, flow value, and liquid residual value of the oleamide solution in the solvent tank, the distillation tower, the cooling tank, and the distillation tank, and sends the measured values ​​to the system calculation module; The system calculation module stores calculation files and instruction files, receives the measured values ​​of the parameter metering module in real time, retrieves and runs relevant calculation files, calculates data results, and sends data signals to the data display module; the system calculation module runs relevant instruction files according to the calculation results, generates instruction signals, and sends them to the front-end control module; The front-end control module receives the control signal of the system computing module, and specifically executes to control the mixing tank, the solvent tank, the distillation tower, the cooling tank, the heating structure of the distillation tank, and the conveying power parts; The data display module is connected to the parameter metering module and the system calculation module, and displays the measured values ​​of the parameter metering module, the calculation results of the system calculation module and the instruction signal.

[0017] By adopting the above technical solution, the system calculation module, the parameter metering module, and the front-end control module constitute the front-end module of the control system in the above solution, wherein the parameter metering module is used for collecting the data and status information of the operation of the active parts inside each device on the automated oleamide production line. The collected data and status information must be related to the preparation of oleamide, and the parameter metering module belongs to the front-end detection end; The parameter metering module sends the acquired information to the system calculation module. The system calculation module calculates and analyzes the temperature and pressure in the mixing tank, solvent tank, distillation tower, cooling tank and reactor. The system calculation module sets the normal range values ​​of oleamide temperature and pressure corresponding to the above reactors, mixing tanks, solvent tanks, distillation towers, cooling tanks and distillation tanks. The calculation result of the information acquired by the parameter metering module by the system calculation module exceeds the normal range value, that is, the production step of this part of oleamide is abnormal, then the system calculation module retrieves and runs the relevant instruction file, generates a control signal, and sends it to Optionally, the parameter metering module includes a temperature metering unit, a pressure metering unit, a flow metering unit, a power metering unit, and a residual metering unit; The temperature metering unit is used to measure the temperature of the oleamide solution inside the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank; The pressure metering unit is used to measure the gas pressure inside the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank; The flow metering unit is used to measure the flow rate of the oleamide solution delivered between the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank; The power metering unit is used to measure the operating power of the oleamide solution delivery drive member; The residual metering unit is used to measure the residual amount of oleamide solution inside the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank.

[0018] By adopting the above technical solution, the functions of the parameter metering module are specifically refined into multiple units, and the data collection and monitoring are grouped according to the units. The temperature metering unit is used to measure the temperature of oleamide in each device; the flow metering unit monitors the delivery flow of oleamide between each device in real time; the power metering unit is used to measure the operating power of the active parts in each device, such as the operating power of the delivery pump; the residual metering unit is used to measure the remaining amount of oleamide in each device.

[0019] Optionally, the front-end control module includes a temperature control unit, a pressure control unit, and a transport control unit; The temperature control unit is used to control the operation of the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the heating structure inside the distillation tank to change the temperature of the oleamide solution; The pressure control unit is used to control the gas pressure inside the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank; The transport control unit is used to control the transport conditions of the oleamide solution between the mixing tank, the solvent tank, the distillation tower, the cooling tank, and the distillation tank, including the conductance and flow rate of the transport pipeline.

[0020] By adopting the above technical solution, the front-end control module is also divided into units according to specific control functions, and each of the divided units is used to receive relevant control signals; The temperature control unit receives the temperature control signal to adjust the ambient temperature inside the reactor, mixing tank, solvent tank, distillation tower, cooling pipe and distillation tank; the pressure control unit is used to adjust the ambient pressure inside the reactor, mixing tank, solvent tank, distillation tower, cooling pipe and distillation tank; the transport control unit is used to control the transport of oleamide between the reactor, mixing tank, solvent tank, distillation tower, cooling pipe and distillation tank. Specifically, when the residual metering unit detects that the residual amount inside the reactor, mixing tank, distillation tower, cooling pipe and distillation tank is insufficient, the transport control unit is used to specifically control the transport at the front end, and timely replenish the amount of oleamide solution in the device to ensure the output efficiency of the production line.

[0021] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting up a mixing tank connected to the reactor, the uniform mixing of the oleamide solution is ensured, which significantly improves the consistency and stability of product quality; the heating structure in the solvent tank can heat the solvent, effectively improve the efficiency of subsequent reactions and reduce energy consumption, significantly improving the purity and yield of the final product; 2. The synergistic effect of the distillation tower and the cooling tank can efficiently and accurately separate impurities and excess solvents in the oleamide solution, greatly improving the purity and yield of the product; 3. The parameter metering module integrates a variety of metering units, which can comprehensively and accurately measure the temperature, pressure, flow, power and margin of the oleamide solution, ensuring that the key parameters of the production process are monitored with high precision, significantly improving production efficiency and product quality; the system calculation module receives the measurement values ​​of the parameter metering module in real time and calls the calculation file, realizing high-precision monitoring and dynamic adjustment of the oleamide preparation process, and improving the stability and reliability of the production process; the front-end control module accurately controls the heating structure and the conveying power parts according to the command signal of the system calculation module, realizing rapid response and high-precision control, and effectively solving the problems of slow response speed and low control accuracy of the existing system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0023] Figure 2 It is a structural schematic diagram made in the embodiment of the present application to highlight the internal structure of the solvent tank.

[0024] Figure 3 It is a structural schematic diagram made to highlight the internal structure of the normal temperature tank in the embodiment of the present application.

[0025] Figure 4 This is a logic block diagram of the control system in the embodiment of the present application. Explanation of the accompanying drawings: 1. Reactor; 11. Solvent tank; 111. Holding tank; 12. Mixing tank; 13. Distillation tower; 14. Distillation tank; 15. Normal temperature tank; 16. Cooling tank; 2. System calculation module; 3. Data display module; 4. Front-end control module; 41. Transport control unit; 42. Pressure control unit; 43. Temperature control unit; 5. Parameter metering module; 51. Remaining metering unit; 52. Power metering unit; 53. Flow metering unit; 54. Pressure metering unit; 55. Temperature metering unit. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-4 This application is described in further detail.

[0027] On the one hand, the present application embodiment discloses an automated production line for preparing oleic acid amide. Figure 1 An automated oleic acid amide preparation production line includes a reactor 1, a mixing tank 12, a solvent tank 11, a distillation tower 13, a distillation tank 14, a normal temperature tank 15, and a cooling tank 16; wherein the reactor 1, the mixing tank 12, the distillation tower 13, the distillation tank 14, the normal temperature tank 15, and the cooling tank 16 are sequentially connected, which is the specific conveying line of oleic acid amide in this embodiment.

[0028] Reference Figure 1 , Reactor 1 is the starting point for the preparation of automated oleic acid amide in this embodiment, and an acylation reaction is carried out in reactor 1. Oleic acid and anhydrous ammonia are used to carry out an acylation reaction under specific conditions to generate oleic acid ammonium salt, which is dehydrated at high temperature to generate oleic acid amide and water. Oleic acid ammonium salt needs to be dehydrated to improve the purity of oleic acid ammonium salt to ensure the purity of oleic acid amide in reactor 1, so the reaction condition in reactor 1 is high temperature; in actual application, the temperature in reactor 1 is generally stably maintained at 220°C, pressurized to 20 times the normal pressure, that is, 2MPa, and a single reaction time of 2-4 hours. In practical applications, the purity of oleic acid amide generated in reactor 1 can reach more than 95%, but considering that oleic acid amide is easily mixed with a small amount of oleic acid and a trace of anhydrous ammonia, the cooling and recrystallization method in the traditional scheme will cause oleic acid molecules and other trace impurities in reactor 1 to be doped in the solid crystal of oleic acid amide, reducing the purity of oleic acid amide. In order to further improve the purity of oleic acid amide, the dissolution and distillation method is adopted in this embodiment to further purify the oleic acid amide liquid.

[0029] Reference Figure 1 and Figure 2 The oleic acid amide output from the reactor 1 is transported to the mixing tank 12 and mixed with the solvent in the mixing tank 12. In this embodiment, the solvent tank 11 stores a solvent for dissolving oleic acid amide, preferably a 50% ethanol solution; in order to improve the dissolution effect, the ethanol solution should be heated appropriately, and in this embodiment, the ethanol solution is heated to 70° C. The solvent tank 11 is provided with a heating structure for the ethanol solution in the solvent tank 11.

[0030] Reference Figure 1 The mixing tank 12 is connected to the solvent tank 11 and the reactor 1, and receives the ethanol solution for dissolving oleamide transported from the solvent tank 11. The ethanol solution is mixed with the oleamide liquid product transported from the reactor 1 in the mixing tank 12. At this time, in addition to the mixed oleamide, other impurities are also mixed in the ethanol solution. The impurities with the highest proportion are the raw materials of oleamide that have not completely participated in the reaction, namely oleic acid and anhydrous ammonia. Anhydrous ammonia is very volatile at high temperature, so most of the impurities are oleic acid, and the amount of anhydrous ammonia can be ignored. Therefore, the mixed oleamide and ethanol solution are stored in the mixing tank 12.

[0031] Reference Figure 1 The distillation tower 13 is connected to the mixing tank 12. The mixing tank 12 periodically delivers an oleamide solution doped with impurities to the distillation tower 13. The impurities in the oleamide solution are distilled by distillation. A discharge pipe for the outflow of gasified impurities is provided at the top of the distillation tower 13. The discharge pipe is connected to a high-temperature air pump. The high-temperature air pump operates periodically with the distillation process to slowly extract the gas inside the distillation tower 13.

[0032] Reference Figure 1 , the distillation tank 14 is connected to the distillation tower 13, and the oleamide product distilled by the distillation tower 13 is subjected to a secondary distillation process in the distillation tank 14. Since the distillation process in the distillation tower 13 is sufficient to remove the impurities in the oleamide product, the secondary distillation process is mainly used to reduce the moisture content in the oleamide product. The ambient temperature in the distillation tank 14 is set to 120°C-150°C, preferably 120°C, and does not need to be too high to reduce costs. Similarly, the distillation tank 14 is similar to the distillation tower 13, and its top should also be provided with an impurity discharge channel for water vapor discharge, and connected to a high-temperature air pump (not shown in the figure) through a pipeline.

[0033] Reference Figure 1 and Figure 2 Considering that the preset temperature value of ethanol is relatively low, in order to further improve the utilization rate of thermal energy, the high-temperature hot air in the reactor 1, the distillation tower 13, and the distillation tank 14 can be connected to the heating component in the solvent tank 11, and the high-temperature hot air inside the reactor 1, the distillation tower 13, and the distillation tank 14 can be reasonably utilized; specifically, the solvent tank 11 is arranged in a double-layer tank body, wherein the inner tank body is a holding tank 111, and the pipeline for transporting oleic acid amide is specifically connected to the holding tank 111, and the space between the outer wall of the holding tank 111 and the inner wall of the solvent tank 11 is used to receive the hot air in the above-mentioned reactor 1, the distillation tower 13, and the distillation tank 14, and the ethanol solution inside the holding tank 111 is heated by heat exchange; in specific applications, since the temperatures of the hot air in the reactor 1, the distillation tower 13, and the distillation tank 14 are different, the ambient temperature inside the solvent tank 11 can be controlled by controlling the proportion of the hot air source.

[0034] Reference Figure 1 and Figure 3, the normal temperature tank 15 is connected to the distillation tank 14 through a pipeline for conveying oleic acid amide, the inlet end of which is arranged at the bottom of the normal temperature tank 15, and the outlet end is arranged at the top of the opposite side of the normal temperature tank 15. The pipeline for conveying oleic acid amide liquid is bent into multiple sections in an S shape in the normal temperature tank 15 to increase the conveying time of the liquid oleic acid amide in the normal temperature tank 15; normal temperature cooling is provided in the normal temperature tank 15, that is, normal temperature water, preferably 20-30°C water, is added to the normal temperature tank 15, and the temperature is reduced by heat exchange when the liquid oleic acid amide passes through. The setting of the normal temperature tank 15 provides a temperature drop ladder before the subsequent cooling tank 16 cools and crystallizes, so as to avoid excessive single temperature drop of oleic acid amide, which affects the molecular crystal structure inside oleic acid amide. In practical applications, the conveying rate of oleic acid amide in the normal temperature tank 15 can be controlled, and the degree of temperature drop of oleic acid amide can be controlled; the melting point of oleic acid amide is 70°C, therefore, it is necessary to control the output temperature of oleic acid amide in the normal temperature tank 15 to be above 70°C, preferably 100°C.

[0035] Reference Figure 1 The cooling tank 16 is connected to the output end of the normal temperature tank 15 to cool the liquid oleamide output from the normal temperature tank 15. In actual application, the temperature in the cooling tank 16 is 0-10°C. After the oleamide liquid in the normal temperature tank 15 is completely cooled, the technician can take it out.

[0036] The reaction kettle 1, the mixing tank 12, the solvent tank 11, the distillation tower 13, the distillation tank 14, and the cooling tank 16 in this embodiment are all existing technologies and are not described in detail.

[0037] Reference Figure 1 In this embodiment, the mixing tank 12, the solvent tank 11, the distillation tank 14, the cooling tank 16, and the mixing tank 12 are transported through the oleamide pipeline, and valves are provided between the adjacent tanks in the pipeline as flow control parts; wherein, in this embodiment, a high-temperature air pump is provided between the reactor 1 and the solvent tank 11, a high-temperature air pump is provided between the distillation tank 14 and the solvent tank 11, and a high-temperature air pump is provided between the distillation tower 13 and the solvent tank 11, and the three groups of high-temperature air pumps are used as the power for the distillation tank 14, the distillation tower 13, and the reactor 1 to transport hot gas to the solvent tank 11. A high-temperature liquid pump is provided at the top of the distillation tank 14 as the active power part for transporting oleamide.

[0038] The implementation principle of an automated oleamide preparation production line in the present application embodiment is as follows: The oleic acid amide generated by the acylation reaction in the reactor 1 is transported to the mixing tank 12, and the ethanol solution contained in the solvent tank 11 is transported to the cavity inside the solvent tank 11 through the high-temperature hot air in the reactor 1, the distillation tower 13, and the distillation tank 14, and the temperature of the ethanol in the holding tank 111 is heated to above 70° C. The ethanol solution is transported to the mixing tank 12 and mixed with the oleic acid amide liquid. The ethanol solution is used as the solvent of the oleic acid amide solute, and the two are mixed and transported to the distillation tower 13.

[0039] The distillation tower 13 and the distillation tank 14 perform two distillations respectively, and utilize the high boiling point of oleic acid amide to remove impurities in the oleic acid amide liquid.

[0040] After cooling in the constant temperature tank 15 and the cooling tank 16, oleic acid amide is crystallized.

[0041] On the other hand, the present application embodiment discloses a control system for a production line for preparing oleic acid amide. Figure 4 A control system for an automated oleic acid amide preparation production line includes a system calculation module 2, a data display module 3, a parameter metering module 5, and a front-end control module 4; wherein the parameter metering module 5 is integrated in a mixing tank 12, a solvent tank 11, a distillation tower 13, a cooling tank 16, and a distillation tank 14, and measures the temperature value, pressure value, flow value, and liquid residual value of the oleic acid amide solution in the solvent tank 11, the distillation tower 13, the cooling tank 16, and the distillation tank 14, and sends the measured values ​​to the system calculation module 2; the system calculation module 2 internally stores calculation files and instruction files, and receives the measurement data of the parameter metering module 5 in real time. value, retrieve and run the relevant calculation files, calculate the data results, and send the data signal to the data display module 3; the system calculation module 2 runs the relevant instruction files according to the calculation results, generates instruction signals, and sends them to the front-end control module 4; the front-end control module 4 receives the control signal of the system calculation module 2, and specifically executes and controls the heating structure and conveying power parts of the mixing tank 12, the solvent tank 11, the distillation tower 13, the cooling tank 16, and the distillation tank 14; the data display module 3 is connected to the parameter metering module 5 and the system calculation module 2, and displays the measured values ​​of the parameter metering module 5, the calculation results and instruction signals of the system calculation module 2.

[0042] Reference Figure 4Specifically, the parameter metering module 5 includes a temperature metering unit 55, a pressure metering unit 54, a flow metering unit 53, a power metering unit 52, and a residual metering unit 51. The temperature metering unit 55 is used to measure the temperature of the oleic acid amide fluid inside the reactor 1, the mixing tank 12, the solvent tank 11, the distillation tower 13, the cooling tank 16, and the distillation tank 14. In practical applications, the temperature metering unit 55 can be in the form of a high-temperature sensor. A temperature sensor is set in each of the above-mentioned reactor 1, the mixing tank 12, the solvent tank 11, the distillation tower 13, and the cooling tank 16, and a wireless transmission module is integrated to wirelessly transmit the data collected by the temperature sensor; The pressure metering unit 54 can adopt an air pressure sensor, preferably a high-temperature pressure sensor, to collect the internal air pressure; the residual metering unit 51 adopts a liquid level sensor, preferably a photoelectric sensor, and the sensor is set at a preset liquid level height insufficient inside the reactor 1, mixing tank 12, solvent tank 11, distillation tower 13, distillation tank 14, and cooling tank 16. The liquid level contact sensor sends an alarm signal to the system calculation module 2 when it detects that the liquid level height is insufficient; the above-mentioned residual calculation unit, pressure metering unit 54, and temperature metering unit 55 are internal measurement components of the above-mentioned reactor 1, mixing tank 12, solvent tank 11, distillation tank 14, and cooling tank 16. The power metering unit 52 and the flow metering unit 53 are used to measure the flow rate transmission between the above-mentioned tanks; the power metering unit 52 is integrated in the control circuit board of the high-temperature liquid pump and the high-temperature air pump, and collects the current, voltage, power, operation efficiency, etc. of the high-temperature liquid pump and the high-temperature air pump in real time in the form of an ammeter and a voltmeter; the flow metering unit 53 is arranged in the pipeline between the reactor 1, the mixing tank 12, the solvent tank 11, the distillation tank 14, and the cooling tank 16 in the form of a flow sensor to collect the flow value of liquid oleamide in real time.

[0043] Reference Figure 4 When the system calculation module 2 is actually used, an engineering computer with data processing and instruction sending can be used. The preparation production line of oleic acid amide is set up in the workshop. The data display module 3 is connected to the engineering computer by wire control, and the calculation information of the system calculation module 2 is displayed through the data transmission line.

[0044] Reference Figure 4 The front-end control module 4 includes a temperature control unit 43, a pressure control unit 42, and a transport control unit 41; the temperature control unit 43 and the pressure control unit 42 specifically include control circuits of temperature electronic control components in the reactor 1, the mixing tank 12, the solvent tank 11, the distillation tank 14, and the cooling tank 16, as well as a control circuit of a high-temperature air pump used for heat exchange in the solvent tank 11; the transport control unit 41 specifically includes a control circuit of a high-temperature liquid pump.

[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automated oleamide production line, comprising a reaction kettle (1) for carrying out a oleamide preparation reaction, characterized in that: Also includes: A mixing tank (12), connected to the reaction kettle (1), for mixing the oleamide solution; A solvent tank (11) is used to store the solvent of the oleic acid amide solution, the solvent tank (11) is connected to the mixing tank (12) to transport the solvent to the mixing tank (12); a heating structure is provided in the solvent tank (11) to heat the solvent; A distillation tower (13), connected to the mixing tank (12), for distilling the oleamide solution; The cooling tank (16) is connected to the distillation tower (13) and is used for cooling and crystallizing the oleamide liquid.

2. The automated oleamide production line according to claim 1, characterized in that: The heating structure of the solvent tank (11) is connected to the top of the distillation tower (13) and the top of the reaction kettle (1).

3. An automated oleamide production line according to claim 1, characterized in that: Also includes: The distillation tank (14) is disposed between the distillation tower (13) and the cooling tank (16), is connected to the distillation tower (13) and the cooling tank (16), and is used for secondary distillation of the oleamide solution.

4. An automated oleamide production line according to claim 3, characterized in that: Also includes: The normal temperature tank (15) is arranged between the distillation tank (14) and the cooling tank (16) to cool the oleamide liquid at normal temperature.

5. The automated oleamide production line according to claim 3, characterized in that: The distillation tank (14) is connected to the heating structure of the solvent tank (11).

6. A control system applied to an automated oleamide production line as claimed in claim 5, characterized in that: It includes a system calculation module (2), a parameter measurement module (5), a front-end control module (4), and a data display module (3); The parameter metering module (5) is integrated in the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14), and measures the temperature value, pressure value, flow value, and liquid residual value of the oleamide solution in the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14), and sends the measured values ​​to the system calculation module (2); The system calculation module (2) internally stores calculation files and instruction files, receives the measured values ​​of the parameter measurement module (5) in real time, retrieves and runs relevant calculation files, calculates data results, and sends data signals to the data display module (3); The system calculation module (2) runs the relevant instruction file according to the calculation result, generates an instruction signal, and sends it to the inside of the front-end control module (4); The front-end control module (4) receives the control signal of the system calculation module (2), and specifically controls the heating structure and the conveying power parts of the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14); The data display module (3) is connected to the parameter measurement module (5) and the system calculation module (2) to display the measured values ​​of the parameter measurement module (5), the calculation results of the system calculation module (2) and the instruction signal.

7. The control system of the automated oleamide production line according to claim 6, characterized in that: The parameter metering module (5) comprises a temperature metering unit (55), a pressure metering unit (54), a flow metering unit (53), a power metering unit (52), and a residual metering unit (51); The temperature metering unit (55) is used to measure the temperature of the oleic acid amide solution inside the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14); The pressure metering unit (54) is used to measure the gas pressure inside the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14); The flow metering unit (53) is used to measure the flow rate of the oleamide solution transported between the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14); The power metering unit (52) is used to measure the operating power of the oleamide solution delivery drive component; The residual metering unit (51) is used to measure the residual amount of the oleamide solution inside the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14).

8. The control system of the automated oleamide production line according to claim 6, characterized in that: The front-end control module (4) comprises a temperature control unit (43), a pressure control unit (42), and a transport control unit (41); The temperature control unit (43) is used to control the operation of the heating structures inside the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14), so as to change the temperature of the oleamide solution; The pressure control unit (42) is used to control the gas pressure inside the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14); The transport control unit (41) is used to control the transport conditions of the oleamide solution between the mixing tank (12), the solvent tank (11), the distillation tower (13), the cooling tank (16), and the distillation tank (14), including the conductance and flow rate of the transport pipeline.

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