Polymerizing kettle cleaning method and system, intelligent terminal and storage medium

Abstract

The invention relates to a polymeric kettle cleaning method and system, an intelligent terminal and a storage medium, and relates to the field of cleaning technologys.The method comprises the steps that a cleaning trigger signal of a polymeric kettle is obtained; controlling a preset cleaning device to move into the polymerization kettle along a preset entering direction according to the cleaning trigger signal; acquiring a position feedback signal of the cleaning device; whether the position feedback signal meets the requirement of a preset sequential cleaning station or not is judged; if not, continuously controlling the cleaning device to move along the entering direction, and continuously acquiring a position feedback signal of the cleaning device for cyclic judgment; and if yes, controlling the cleaning device to clean the polymerization kettle. The cleaning device has the effects of improving the production efficiency of the polymerization kettle and reducing the safety risk during cleaning.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and in particular to a polymerization kettle cleaning method, system, intelligent terminal and storage medium. Background Art

[0002] A polymerization kettle is a device used in the chemical industry for polymerization reactions. During the polymerization process, monomers (i.e. small molecules that can be connected into chain or network structures) combine with each other through chemical reactions to form polymer compounds, which are commonly referred to as plastics, resins and other materials. The design and operation of the polymerization kettle plays an important role in controlling product quality, improving production efficiency and ensuring safe production.

[0003] In the related art, polyvinyl chloride (PVC) is mainly produced by PVC polymerization kettle using water phase suspension process, which mainly mixes vinyl chloride monomer with other additives for promoting monomer polymerization, and carries out polymerization reaction at a certain temperature and pressure. After the PVC polymerization kettle produces one batch of products, the polymer scaling on the inner wall of the liquid phase space in the kettle is relatively small, and the polymer scaling on the inner wall of the gas phase space at the top of the kettle will be more serious. Scaling will reduce the heat transfer performance and cause unstable reaction temperature control. Therefore, the manhole is usually opened for cleaning after producing 100 to 200 batches of products. Before cleaning, blind plates, replacements, and manholes need to be installed according to maintenance requirements, and offline cleaning equipment is used to thoroughly clean the polymerization kettle. This operation is called offline cleaning. Cleaning the polymerization kettle and other ancillary systems generally takes more than 12 hours.

[0004] Regarding the above-mentioned related technologies, the frequency of offline cleaning of polymerization kettles will vary due to differences in technical routes, but it will usually be maintained at 100 to 200 kettle products. In addition, each cleaning step is cumbersome and takes a long time, which reduces the effective production time of the polymerization kettle and reduces the production efficiency of the polymerization kettle. At the same time, offline cleaning has great safety risks and there is room for improvement. Summary of the invention

[0005] In order to improve the production efficiency of a polymerization kettle and reduce safety risks during cleaning, the present application provides a polymerization kettle cleaning method, system, intelligent terminal and storage medium.

[0006] In the first aspect, the present application provides a method for cleaning a polymerization reactor, which adopts the following technical solution: A method for cleaning a polymerization reactor, comprising: Obtaining a cleaning trigger signal for the polymerization kettle; According to the cleaning trigger signal, the preset cleaning device is controlled to move along the preset entry direction into the polymerization kettle; Obtaining a position feedback signal of a cleaning device; Determine whether the position feedback signal meets the requirements of the preset sequential cleaning stations; If it does not meet the requirements, the cleaning device is continuously controlled to move along the entry direction, and the position feedback signal of the cleaning device is continuously obtained for cyclic judgment; If it meets the requirements, the cleaning device is controlled to clean the polymerization kettle.

[0007] By adopting the above technical scheme, after detecting the cleaning trigger signal of the polymerization kettle, the cleaning device is controlled to enter the polymerization kettle. When the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle produces a batch of products, minimizing the scaling on the top of the kettle, thereby extending the frequency of offline cleaning of the kettle, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing the safety risks during cleaning.

[0008] Optionally, the step of controlling the cleaning device to clean the polymerization kettle includes: Obtain the mother liquor depth of the preset mother liquor tank; Analyze the mother liquor depth and the preset usage depth to determine the cleaning water parameters; Control the preset water supply device to start, and control the water supply device to assist the cleaning device to clean the polymerization kettle according to the cleaning water parameters; Obtaining a cleaning completion trigger signal of the cleaning device; Acquiring the number of cleaning stations of the cleaning device based on a cleaning completion trigger signal; Determine whether the number of cleaning stations meets the requirements of the preset total number of stations; If it does not meet the requirement, the cleaning device is continuously controlled to move along the entry direction to clean the polymerization kettle, and the number of cleaning stations of the cleaning device is continuously obtained for cycle judgment; If it meets the requirements, the cleaning device is controlled to reset.

[0009] By adopting the above technical scheme, the mother liquor depth and the usage depth are compared, so that when it is determined that the mother liquor is sufficient, the mother liquor is used preferentially to clean the polymerization kettle, thereby improving the production quality of the polymerization kettle product PVC and the environmental friendliness of the production process; when it is determined that the number of cleaning stations does not meet the requirement of the total number of stations, it means that the cleaning device has not cleaned all the parts of the polymerization kettle that require cleaning, so the cleaning device continues to be controlled to move and clean, thereby improving the cleaning effect of the polymerization kettle.

[0010] Optionally, the step of controlling the water supply device to assist the cleaning device in cleaning the polymerization kettle according to the cleaning water parameter includes: Obtain the station cleaning time relationship and pre-cleaning station of the polymerization kettle; Determine the actual cleaning time based on the station cleaning time relationship and pre-cleaning station; Controlling the water supply device to supply water to the cleaning device according to the cleaning water parameter to clean the polymerization kettle, and obtaining the cleaning time of the cleaning device; Determine whether the cleaning time meets the requirements of the actual cleaning time; If it does not meet the requirements, the water supply device is controlled to supply water to the cleaning device according to the cleaning water parameters to clean the polymerization kettle, and the cleaning time of the cleaning device is obtained to make a cycle judgment; If it meets the requirements, the cleaning completion trigger signal will be output.

[0011] By adopting the above technical scheme, the actual cleaning time of the pre-cleaning station of the polymerization kettle is first determined, and then the cleaning device is controlled to clean the pre-cleaning station according to the actual cleaning time, thereby ensuring that the cleaning device of the polymerization kettle can effectively remove the scale on the polymerization kettle, thereby improving the cleaning effect of the cleaning device.

[0012] Optionally, the step of obtaining the station cleaning time relationship of the polymerization kettle includes: Acquire the cleaning area image of the polymerization reactor; Dividing the cleaning area image according to the preset workstation area to determine the area detection image corresponding to the workstation area; Perform image recognition analysis on the regional detection image to determine the scaling area of ​​the workstation area; Analyze the fouling area to determine the area ratio; The area ratio and the preset total cleaning time are analyzed to determine the cleaning time relationship of the workstations in the workstation area.

[0013] By adopting the above technical scheme, the cleaning area image of the polymerization kettle is collected, and then the cleaning area image is divided according to the workstation area to obtain a regional detection image. After the scaling area in the regional detection image is identified, the total cleaning time is allocated according to the amount of scaling area, thereby obtaining the station cleaning time relationship of each workstation area, thereby improving the rationality and accuracy of the station cleaning time relationship.

[0014] Optionally, the step of controlling the cleaning device to reset includes: When the number of cleaning stations meets the requirement of the total number of stations, the water supply device is controlled according to the preset pure water parameters to supply water to the preset reset device to clean the cleaning device; Controlling the cleaning device to move along a preset reset direction into a preset parking bin, and obtaining a reset feedback position signal of the cleaning device; When the reset feedback position signal meets the requirements of the preset parking position, the cleaning device, the water supply device and the reset device are controlled to stop; The preset isolation device is controlled to isolate the cleaning device in the parking bin.

[0015] By adopting the above technical solution, after the cleaning device completes the cleaning of the polymerization kettle, the cleaning device is controlled to move into the parking bin, and the resetting device is controlled to clean the cleaning device to prevent the residual raw materials in the polymerization kettle from adhering to the cleaning device, and the isolation device is controlled to isolate the cleaning device in the parking bin to prevent the raw materials from leaking from the cleaning device during the production of the polymerization kettle.

[0016] Optionally, the step of obtaining a cleaning trigger signal of the polymerization kettle includes: Obtaining a discharge completion trigger signal of the polymerization kettle; Acquire the detection pressure in the kettle based on the discharge completion trigger signal; Determine whether the detection pressure in the kettle meets the preset cleaning pressure requirements; If it does not meet the requirement, continue to obtain the detection pressure in the kettle for cyclic judgment; If it meets the requirements, the preset isolation device is controlled to open the preset parking bin to output a cleaning trigger signal.

[0017] By adopting the above technical solution, when the discharge completion trigger signal of the polymerization kettle is detected and it is determined that the detection pressure in the kettle drops to the cleaning pressure, the isolation device is controlled to open the parking bin to output the cleaning trigger signal, thereby improving the accuracy of obtaining the cleaning trigger signal.

[0018] Optionally, the step of controlling a preset isolation device to open a preset parking bin to output a cleaning trigger signal includes: Obtaining the opening detection angle of the isolation device; Determine whether the opening detection angle meets the preset opening angle requirement; If it meets the requirements, the cleaning trigger signal will be directly output, and the preset maintenance prompt information will be given; If not, the isolation device is controlled to open the parking compartment according to the preset opening trigger signal, and the opening trigger signal is obtained; A cleaning trigger signal is output based on the turned-on trigger signal.

[0019] By adopting the above technical solution, when it is determined that the opening detection angle meets the opening angle requirement, it indicates that the isolation device is damaged and the parking bin is not isolated. At this time, a cleaning trigger signal is directly output and a maintenance prompt is given; when it does not meet the requirement, the isolation device is controlled to open the parking bin, and a cleaning trigger signal is output after opening, thereby improving the accuracy of obtaining the cleaning trigger signal.

[0020] In the second aspect, the present application provides a polymerization kettle cleaning system, which adopts the following technical solution: A polymerization kettle cleaning system, comprising: An acquisition module, used for acquiring a cleaning trigger signal and a position feedback signal; A memory for storing a program of a polymerization kettle cleaning method as described in any one of the above items; The program in the processor and the memory can be loaded and executed by the processor to implement any one of the above-mentioned methods for cleaning a polymerization kettle.

[0021] By adopting the above technical solution, the control processor loads and executes a program of a polymerization kettle cleaning method stored in the memory, so that the acquisition module obtains a series of data related to the polymerization kettle cleaning, and then after detecting the cleaning trigger signal of the polymerization kettle, the cleaning device is controlled to enter the polymerization kettle. When the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle produces a batch of products, minimizing the scaling on the top of the kettle, thereby extending the frequency of opening the kettle for offline cleaning, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing the safety risks during cleaning.

[0022] In a third aspect, the present application provides a smart terminal, which adopts the following technical solution: An intelligent terminal comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes a polymerization kettle cleaning method as described in any one of the above items.

[0023] By adopting the above technical solution and operating the intelligent terminal, the processor is made to load and execute a computer program of a polymerization kettle cleaning method stored in the memory, so that after detecting the cleaning trigger signal of the polymerization kettle, the cleaning device is controlled to enter the polymerization kettle, and when the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle produces a batch of products, minimizing the scaling on the top of the kettle, thereby extending the frequency of offline cleaning of the kettle, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing the safety risks during cleaning.

[0024] In a fourth aspect, the present application provides a computer storage medium capable of storing a corresponding program, which is convenient for improving the production efficiency of a polymerization reactor, and adopts the following technical solution: A computer-readable storage medium stores a computer program that can be loaded by a processor and execute any one of the above-mentioned polymerization kettle cleaning methods.

[0025] By adopting the above technical scheme, a computer program of a polymerization kettle cleaning method is stored in a computer-readable storage medium, so that the processor loads and executes the computer program in the storage medium, so that after detecting the cleaning trigger signal of the polymerization kettle, the cleaning device is controlled to enter the polymerization kettle, and when the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle produces a batch of products, minimizing the scaling on the top of the kettle, thereby extending the frequency of opening the kettle for offline cleaning, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing the safety risks during cleaning.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. After detecting the cleaning trigger signal of the polymerization kettle, the cleaning device is controlled to enter the polymerization kettle. When the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle has produced a batch of products, minimizing the scaling on the top of the kettle, thereby extending the frequency of offline cleaning of the kettle, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing the safety risks during cleaning; 2. By comparing the mother liquor depth and the use depth, the mother liquor is used to clean the polymerization kettle first when it is determined that the mother liquor is sufficient, thereby improving the production quality of the polymerization kettle product PVC and the environmental protection of the production process; when it is determined that the number of cleaning stations does not meet the requirements of the total number of stations, it means that the cleaning device has not cleaned all the parts of the polymerization kettle that require cleaning, so the cleaning device is continued to be controlled to move and clean, thereby improving the cleaning effect of the polymerization kettle; 3. By collecting the cleaning area image of the polymerization kettle, the cleaning area image is divided according to the workstation area to obtain the regional detection image. After identifying the scaling area in the regional detection image, the total cleaning time is allocated according to the amount of scaling area, so as to obtain the station cleaning time relationship of each station area, thereby improving the rationality and accuracy of the station cleaning time relationship. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a flow chart of a polymerization kettle cleaning method in an embodiment of the present application.

[0028] Figure 2 It is a flow chart of the steps of controlling the cleaning device to clean the polymerization kettle in an embodiment of the present application.

[0029] Figure 3 It is a flow chart of the steps of controlling the water supply device to assist the cleaning device in cleaning the polymerization kettle according to the cleaning water parameters in an embodiment of the present application.

[0030] Figure 4 It is a flow chart of the steps for obtaining the time relationship of the station cleaning of the polymerization kettle in the embodiment of the present application.

[0031] Figure 5 It is a flow chart of the steps of controlling the resetting of the cleaning device in an embodiment of the present application.

[0032] Figure 6 It is a flow chart of the steps of obtaining a cleaning trigger signal of a polymerization kettle in an embodiment of the present application.

[0033] Figure 7 It is a flow chart of the steps of controlling a preset isolation device to open a preset parking bin to output a cleaning trigger signal in an embodiment of the present application.

[0034] Figure 8 It is a schematic diagram of the structure of the polymerization kettle and the cleaning device in the embodiment of the present application. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of this application more clear, the following Figure 1-Figure 8 It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0036] The embodiment of the present application discloses an automatic online closed cleaning method for a polymerization kettle, and specifically discloses a controller and a cleaning device. The controller and the cleaning device are connected by a data wire to realize data interaction and control. After the controller receives the cleaning trigger signal of the polymerization kettle, the controller controls the cleaning device to enter the polymerization kettle along the entry direction, and when it is detected that the position feedback signal of the cleaning device meets the requirements of the sequential cleaning station, the cleaning device is controlled to clean the polymerization kettle, thereby ensuring that the polymerization kettle is cleaned within a short period of time after the polymerization kettle produces a batch of products, minimizing scaling on the top of the kettle, thereby extending the frequency of opening the kettle for offline cleaning, allowing more time to be used for the production of the polymerization kettle, thereby improving the production efficiency of the polymerization kettle and reducing safety risks during cleaning.

[0037] Reference Figure 1 The present application discloses a method for cleaning a polymerization reactor, comprising the following steps: Step S100: obtaining a cleaning trigger signal of the polymerization kettle.

[0038] The cleaning trigger signal refers to the trigger signal for starting the cleaning of the polymerization kettle. The specific acquisition method is as follows: Figure 6 steps.

[0039] Step S101: controlling a preset cleaning device to move into the polymerization vessel along a preset entry direction according to a cleaning trigger signal.

[0040] Among them, after the controller receives the cleaning trigger signal, the controller responds to the cleaning trigger signal, thereby controlling the cleaning device to move along the entry direction into the polymerization kettle, providing basic support for the subsequent cleaning of the polymerization kettle.

[0041] The cleaning device refers to the device used to clean the polymerization kettle, refer to Figure 8 The cleaning device includes a rodless cylinder, a cleaning gun rod and a three-dimensional rotating nozzle. The cleaning gun rod is connected to the piston of the rodless cylinder. The three-dimensional rotating nozzle is installed at the other end of the cleaning gun rod. The rodless cylinder is opened by an air source control solenoid valve to supply air into the cylinder, causing the piston to move downward. This movement is controlled by a five-position three-way valve, which can change the direction of gas flow, thereby controlling the movement direction of the piston. In this application, the cleaning device is installed on the top of the polymerization kettle along the height direction of the polymerization kettle. The entry direction refers to the direction in which the cleaning device enters the polymerization kettle. In the embodiment of this application, the vertical downward direction is the entry direction.

[0042] Step S102: obtaining a position feedback signal of the cleaning device.

[0043] Among them, the position feedback signal refers to the feedback signal of the position of the cleaning device when the cleaning device moves into the polymerization kettle. The position change of the cleaning device is monitored and controlled by a special encoder, and is fed back to the controller in a timely manner.

[0044] Step S103: Determine whether the position feedback signal meets the requirements of the preset sequential cleaning stations.

[0045] Among them, the sequential cleaning station refers to the sequence of stations for cleaning the polymerization kettle, such as the first station, the second station and the third station, etc. The requirements for the sequential cleaning stations refer to the consistency with the stations corresponding to the sequential cleaning stations.

[0046] The controller determines whether the position corresponding to the position feedback signal is consistent with the position corresponding to the sequential cleaning position, thereby determining whether the cleaning device moves to the cleaning position.

[0047] Step S1031: If not, continue to control the cleaning device to move along the entry direction, and continue to obtain the position feedback signal of the cleaning device for cyclic judgment.

[0048] Among them, if the controller determines that the position corresponding to the position feedback signal is inconsistent with the position corresponding to the sequential cleaning station, it indicates that the cleaning device has not moved to the preset cleaning station. Therefore, the cleaning device continues to be controlled to move along the entry direction, and the position feedback signal of the cleaning device continues to be detected, so as to continue to pay attention to the position change of the cleaning device.

[0049] Step S1032: If the conditions are met, the cleaning device is controlled to clean the polymerization kettle.

[0050] If the controller determines that the position corresponding to the position feedback signal is consistent with the position corresponding to the sequential cleaning position, it indicates that the cleaning device has moved to the cleaning position, so the cleaning device is controlled to clean the polymerization kettle. The specific method is as follows Figure 2 The steps are adopted, so that in the intermittent process of PVC production, the polymerization kettle can be cleaned within the time of two production quality inspections, thereby reducing the accumulation of polymerization kettle scale on the top of the polymerization kettle, minimizing the number of times the polymerization kettle is opened for offline cleaning, reducing the number of unplanned shutdowns, and improving production efficiency.

[0051] Reference Figure 2 The step of controlling the cleaning device to clean the polymerization kettle comprises: Step S200: Obtain the mother liquor depth of a preset mother liquor tank.

[0052] The mother liquor tank refers to a container for holding the mother liquor water discharged from the polymerization kettle after sedimentation filtration. The mother liquor depth refers to the depth of the mother liquor in the mother liquor tank, which is detected by the liquid level sensor in the mother liquor tank and sent to the controller.

[0053] Step S201: Analyze the mother liquor depth and the preset usage depth to determine the cleaning water parameters.

[0054] The use depth refers to the depth at which the mother liquor can be used for cleaning, and the specific value is determined by the operator according to the actual situation. The cleaning water parameter refers to the type of cleaning water, which is determined by the controller after comparing and analyzing the mother liquor depth and the use depth. When it is determined that the mother liquor depth is not less than the use depth, the mother liquor water is determined as the cleaning water parameter, otherwise, pure water is determined as the cleaning water parameter.

[0055] Step S202: Control the preset water supply device to start, and control the water supply device to assist the cleaning device to clean the polymerization kettle according to the cleaning water parameters.

[0056] After determining the parameters of the cleaning water, the controller controls the water supply device to start, thereby controlling the water supply device to use the water type corresponding to the cleaning water parameters to assist the cleaning device in cleaning the polymerization kettle. The specific method is as follows Figure 3 steps.

[0057] The water supply device refers to a device used to supply water to the cleaning device. In the embodiment of the present application, a high-pressure plunger pump is used as the power source of the cleaning water, and a low flow rate and a high pressure are guaranteed, which should not be lower than 11 MPa.

[0058] Step S203: obtaining a cleaning completion trigger signal of the cleaning device.

[0059] The cleaning completion trigger signal refers to the trigger signal when the cleaning device completes cleaning at a station. For specific acquisition methods, refer to Figure 3 steps.

[0060] Step S204: obtaining the number of cleaning stations of the cleaning device based on the cleaning completion trigger signal.

[0061] Among them, after the controller receives the cleaning completion trigger signal, the controller responds to the cleaning completion trigger signal, thereby calling the cleaning station number to provide data support for subsequent determination of whether to continue cleaning.

[0062] The number of cleaning station times refers to the number of times the cleaning device cleans the polymerization kettle cleaning station. Each time the cleaning device cleans at the station, the counter counts it.

[0063] Step S205: Determine whether the number of cleaning stations meets the requirement of the preset total number of cleaning stations.

[0064] The total number of workstations refers to the number of times the polymerization kettle is cleaned, which is actually the same as the number of workstations. The requirement for the total number of workstations is equal to the total number of workstations, which is stored in the controller by the operator according to the actual situation.

[0065] The controller determines whether the number of cleaning stations is equal to the total number of stations, thereby determining whether the cleaning device has completed the cleaning of the polymerization kettle.

[0066] Step S2051: If not, continue to control the cleaning device to move along the entry direction to clean the polymerization kettle, and continue to obtain the number of cleaning stations of the cleaning device for cycle judgment.

[0067] Among them, if the controller determines that the number of cleaning stations is not equal to the total number of stations, it means that the cleaning device has not completed the cleaning of the polymerization kettle. Therefore, the cleaning device continues to be controlled to move along the entry direction, so as to continue to clean the next station of the polymerization kettle, and continue to detect the number of cleaning stations of the cleaning device, so as to continue to pay attention to the cleaning situation of the polymerization kettle by the cleaning device.

[0068] Step S2052: If it meets the requirements, the cleaning device is controlled to reset.

[0069] If the controller determines that the number of cleaning stations is equal to the total number of stations, it means that the cleaning device has completed the cleaning of the polymerization kettle, so the cleaning device is controlled to reset. For specific methods, refer to Figure 5 steps.

[0070] Reference Figure 3 The steps of controlling the water supply device to assist the cleaning device to clean the polymerization kettle according to the cleaning water parameters include: Step S300: Obtain the cleaning time relationship of the polymerization kettle stations and the pre-cleaning stations.

[0071] Among them, the station cleaning time relationship refers to the corresponding relationship between different stations and cleaning time. For specific acquisition methods, refer to Figure 4 The pre-cleaning station refers to the station where the polymerization kettle is to be cleaned, which is determined by the controller according to the cleaning times of the cleaning device. For example, if the cleaning times is 0, the pre-cleaning station is the first station, and if the cleaning times is 1, the pre-cleaning station is the second station.

[0072] Step S301: Determine the actual cleaning time according to the station cleaning time relationship and the pre-cleaning station.

[0073] The actual cleaning time refers to the specific cleaning time of the cleaning device for the station to be cleaned, which is obtained by the controller by searching the mapping table corresponding to the cleaning time relationship of the pre-cleaning station.

[0074] Step S302: Control the water supply device to supply water to the cleaning device according to the cleaning water parameter to clean the polymerization kettle, and obtain the cleaning time of the cleaning device.

[0075] Among them, after determining the cleaning water parameters, the water supply device is controlled to supply water to the cleaning device with the water type corresponding to the cleaning water parameters, so that the cleaning device cleans the polymerization kettle, and the cleaning time of the cleaning device is detected to provide data support for the subsequent determination of whether the cleaning is completed.

[0076] The cleaning time refers to the time the cleaning device cleans the current workstation, which is obtained by counting the timer.

[0077] Step S303: Determine whether the cleaning time meets the actual cleaning time requirement.

[0078] The actual cleaning time requirement refers to being equal to the actual cleaning time. The controller determines whether the cleaning time is equal to the actual cleaning time, thereby determining whether the cleaning device has completed cleaning the current station.

[0079] Step S3031: If it does not meet the requirements, the water supply device is controlled to supply water to the cleaning device according to the cleaning water parameters to clean the polymerization kettle, and the cleaning time of the cleaning device is obtained to perform cycle judgment.

[0080] Among them, if the controller determines that the cleaning time is not equal to the actual cleaning time, it means that the cleaning device has not completed the cleaning of the current workstation. Therefore, the water supply device continues to control the water supply device to supply water to the cleaning device with the water type corresponding to the cleaning water parameters, so that the cleaning device cleans the polymerization kettle, and continues to detect the cleaning time of the cleaning device, so as to continue to pay attention to the cleaning situation of the polymerization kettle by the cleaning device.

[0081] Step S3032: If it meets the requirements, a cleaning completion trigger signal is output.

[0082] If the controller determines that the cleaning time is equal to the actual cleaning time, it indicates that the cleaning device has completed cleaning the station, so a cleaning completion trigger signal is output. The cleaning completion trigger signal in this step is consistent with the cleaning completion trigger signal in step S203, and will not be repeated here.

[0083] Reference Figure 4 The steps of obtaining the station cleaning time relationship of the polymerization kettle include: Step S400: Acquire the cleaning area image of the polymerization kettle.

[0084] The cleaning area image refers to the image of the cleaning area on the polymerization kettle, which is captured by a camera installed on the cleaning gun rod.

[0085] Step S401: dividing the cleaning area image according to the preset workstation areas to determine the area detection image corresponding to the workstation areas.

[0086] The workstation area refers to the area corresponding to different workstations, which is determined by the operator according to the actual situation of the workstation and stored in the controller. The area detection image refers to the cleaning image of different workstations, which is determined by the controller after dividing and cutting the cleaning area image according to the workstation area.

[0087] Step S402: performing image recognition analysis on the regional detection image to determine the scaling area of ​​the workstation area.

[0088] The fouling area refers to the polymer fouling area in different workstation areas, which is obtained by performing fouling feature recognition and area recognition on the image corresponding to the regional detection image by a preset fouling area recognition model.

[0089] Step S403: Analyze the scaling area to determine the area ratio.

[0090] The area ratio refers to the scaling area ratio value of different workstation areas, which is obtained by the controller by taking the quotient of the scaling area.

[0091] Step S404: Analyze the area ratio and the preset total cleaning time to determine the cleaning time relationship of the workstations in the workstation area.

[0092] The total cleaning time refers to the total cleaning time of the polymerization kettle, which is usually ten minutes and is stored in the controller by the operator. The station cleaning time relationship in this step is consistent with the station cleaning time relationship in step S300. The controller allocates the total cleaning time according to the area ratio and forms a mapping table by corresponding the allocated time to the station one by one.

[0093] Reference Figure 5 , the steps of controlling the resetting of the cleaning device include: Step S500: When the number of cleaning stations meets the requirement of the total number of stations, the water supply device is controlled according to the preset pure water parameters to supply water to the preset reset device to clean the cleaning device.

[0094] Among them, when the controller determines that the number of cleaning stations is equal to the total number of stations, it indicates that the cleaning device has completed the cleaning of the polymerization kettle. At this time, the water supply device is controlled to supply water to the reset device with the water type corresponding to the pure water parameters, so that the reset device cleans the cleaning device during the resetting process of the cleaning device to remove the polymer that may exist on the cleaning device.

[0095] The pure water parameter means that the cleaning water is pure water, which is stored in the controller by the operator. The reset device refers to a device that removes the polymer adhering to the cleaning device during the reset process of the cleaning device, refer to Figure 8 In the embodiment of the present application, a high-pressure pump and a nozzle cleaning ring tube are used.

[0096] Step S501: Control the cleaning device to move along a preset reset direction into a preset parking bin, and obtain a reset feedback position signal of the cleaning device.

[0097] Among them, after the reset device is turned on, the cleaning device is controlled to move along the reset direction into the parking compartment, and the reset feedback position signal of the cleaning device is detected to provide data support for the subsequent determination of whether the cleaning device has completed the reset.

[0098] The reset direction refers to the direction in which the cleaning device resets, which is opposite to the entry direction and is the vertical upward direction. The parking compartment refers to the space used to park the cleaning device in the non-cleaning state. For specific structure, refer to Figure 8 The reset feedback position signal refers to the feedback signal of the position of the cleaning device during the reset process, which is monitored by a dedicated encoder and sent to the controller.

[0099] Step S502: When the reset feedback position signal meets the requirement of the preset parking position, the cleaning device, the water supply device and the reset device are controlled to stop.

[0100] The parking position refers to the position where the cleaning device completes the reset, and the parking position requirement refers to the consistency with the parking position, which is stored in the controller by the operator. When the controller determines that the position corresponding to the reset feedback position signal is consistent with the parking position, it indicates that the cleaning device has been reset into the parking bin, so the cleaning device, water supply device and reset device are controlled to stop.

[0101] Step S503: controlling the preset isolation device to isolate the cleaning device in the parking compartment.

[0102] Among them, after the cleaning device is reset and enters the parking chamber, the isolation device is controlled to close the parking chamber, thereby isolating the cleaning device in the parking chamber to ensure that no leakage occurs from the cleaning device when the polymerization kettle is in normal use. The isolation device refers to a device used to isolate the cleaning device in the parking chamber, refer to Figure 8 , an isolation ball valve is used in the embodiment of the present application.

[0103] Reference Figure 6 , the step of obtaining the cleaning trigger signal of the polymerization kettle includes: Step S600: obtaining a discharge completion trigger signal of the polymerization kettle.

[0104] The discharge completion trigger signal refers to the trigger signal for the completion of the discharge of a batch of products from the polymerization kettle, which is sent from the distributed detection system to the controller.

[0105] Step S601: acquiring the detection pressure in the kettle based on the discharge completion trigger signal.

[0106] Among them, when the discharge completion trigger signal is detected, it means that the polymerization kettle has discharged the product from the polymerization kettle. At this time, one of the conditions for cleaning the polymerization kettle is met. Therefore, the pressure in the kettle is tested to provide data support for the subsequent determination of whether cleaning can be carried out.

[0107] The detected pressure in the reactor refers to the pressure in the reactor after the polymerization reactor discharges the product, which is detected by the pressure sensor and sent to the controller.

[0108] Step S602: Determine whether the detected pressure in the kettle meets the preset cleaning pressure requirement.

[0109] The cleaning pressure refers to the pressure at which the polymerization kettle can be cleaned. In the embodiment of the present application, 0.3 MPa is taken as an example. The cleaning pressure requirement refers to not being greater than the cleaning pressure, which is stored in the controller by the operator.

[0110] The controller determines whether the detection pressure in the kettle is not greater than the cleaning pressure, thereby determining whether the pressure in the kettle has reached a pressure suitable for cleaning.

[0111] Step S6021: If it does not meet the requirements, continue to obtain the detection pressure in the kettle for cyclic judgment.

[0112] Among them, if the controller determines that the detection pressure in the kettle is greater than the cleaning pressure, it means that the pressure in the polymerization kettle is relatively large and it is not suitable for cleaning at this time. Therefore, the detection pressure in the kettle continues to be detected, so as to continue to pay attention to the changes in the pressure of the polymerization kettle.

[0113] Step S6022: If it is met, the preset isolation device is controlled to open the preset parking bin to output a cleaning trigger signal.

[0114] If the controller determines that the detected pressure in the reactor is not greater than the cleaning pressure, it indicates that the pressure in the polymerization reactor is relatively low and it is suitable for cleaning at this time. Therefore, the isolation device is controlled to open the parking compartment and then output a cleaning trigger signal. For specific methods, refer to Figure 7 steps.

[0115] The isolating device in this step is the same as that in step S503, and will not be described in detail here. The parking bin in this step is the same as that in step S501, and will not be described in detail here.

[0116] Reference Figure 7 The step of controlling the preset isolation device to open the preset parking compartment to output a cleaning trigger signal includes: Step S700: obtaining the opening detection angle of the isolation device.

[0117] The opening detection angle refers to the angle before the isolation device is opened, which is detected by the rotation position sensor and sent to the controller.

[0118] Step S701: Determine whether the opening detection angle meets the preset opening angle requirement.

[0119] The opening angle refers to the angle after the isolation device is opened. The specific value is determined by the operator according to the actual situation of the isolation device. The requirement of the opening angle refers to the consistency with the opening angle. The controller determines whether the opening detection angle is consistent with the opening angle, thereby determining whether the isolation device is closed before opening.

[0120] Step S7011: If it meets the requirements, a cleaning trigger signal is directly output, and a prompt is given according to the preset maintenance prompt information.

[0121] Among them, if the controller determines that the opening detection angle is consistent with the opening angle, it means that the isolation device is already in the open state before opening, so the cleaning trigger signal is directly output. However, the isolation device is already in the open state before opening, indicating that the isolation device is damaged, so the personnel are prompted to repair the isolation device according to the maintenance prompt information.

[0122] Maintenance reminder information refers to reminder information for maintenance of the isolation device, which can be in the form of text or voice.

[0123] Step S7012: If not, the isolation device is controlled to open the parking compartment according to a preset opening trigger signal, and an opening trigger signal is obtained.

[0124] Among them, if the controller determines that the opening detection angle is inconsistent with the opening angle, it means that the isolation device was closed before opening. Therefore, the isolation device is controlled to open the parking compartment according to the opening trigger signal, and the opening trigger signal is obtained to provide data support for the subsequent determination of whether to output the cleaning trigger signal.

[0125] The opening trigger signal is the trigger signal for controlling the opening of the isolation device, which is stored in the controller by the operator. The opened trigger signal is the trigger signal that the isolation device has been opened, which is output when the rotation position sensor detects that the rotation angle is equal to the opening angle.

[0126] Step S702: outputting a cleaning trigger signal based on the turned-on trigger signal.

[0127] When the controller receives the start trigger signal, it indicates that the isolation device has opened the parking bin, and at this time, a cleaning trigger signal is output to control the cleaning device to enter the polymerization kettle from the parking bin for cleaning.

[0128] Based on the same inventive concept, the embodiment of the present application provides a polymerization kettle cleaning system, comprising: An acquisition module is used to acquire a cleaning trigger signal, a position feedback signal, a mother liquor depth, a cleaning completion trigger signal, the number of cleaning stations, the station cleaning time relationship, a pre-cleaning station, a cleaning time, a cleaning area image, a reset feedback position signal, a discharge completion trigger signal, a detection pressure in the kettle, an opening detection angle, and an opening trigger signal; A memory for storing a program of a polymerization kettle cleaning method; The program in the memory can be loaded and executed by the processor to implement a polymerization kettle cleaning method.

[0129] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0130] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed by a polymerization kettle cleaning method.

[0131] Computer storage media include, for example, various media that can store program codes, such as USB flash drives, mobile hard disks, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0132] Based on the same inventive concept, an embodiment of the present application provides an intelligent terminal, including a memory and a processor, wherein the memory stores a computer program that can be loaded by the processor and execute a polymerization kettle cleaning method.

[0133] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. The specific working process of the system, device and unit described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0134] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Any feature disclosed in this specification (including the abstract and drawings), unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for cleaning a polymerization reactor, characterized in that: include: Obtaining a cleaning trigger signal for the polymerization kettle; According to the cleaning trigger signal, the preset cleaning device is controlled to move along the preset entry direction into the polymerization kettle; Obtaining a position feedback signal of a cleaning device; Determine whether the position feedback signal meets the requirements of the preset sequential cleaning stations; If it does not meet the requirements, the cleaning device is continuously controlled to move along the entry direction, and the position feedback signal of the cleaning device is continuously obtained for cyclic judgment; If it meets the requirements, the cleaning device is controlled to clean the polymerization kettle.

2. A method for cleaning a polymerization reactor according to claim 1, characterized in that: The steps of controlling the cleaning device to clean the polymerization kettle include: Obtain the mother liquor depth of the preset mother liquor tank; Analyze the mother liquor depth and the preset usage depth to determine the cleaning water parameters; Control the preset water supply device to start, and control the water supply device to assist the cleaning device to clean the polymerization kettle according to the cleaning water parameters; Obtaining a cleaning completion trigger signal of the cleaning device; Acquiring the number of cleaning stations of the cleaning device based on a cleaning completion trigger signal; Determine whether the number of cleaning stations meets the requirements of the preset total number of stations; If it does not meet the requirement, the cleaning device is continuously controlled to move along the entry direction to clean the polymerization kettle, and the number of cleaning stations of the cleaning device is continuously obtained for cycle judgment; If it meets the requirements, the cleaning device is controlled to reset.

3. A method for cleaning a polymerization reactor according to claim 2, characterized in that: The steps of controlling the water supply device to assist the cleaning device to clean the polymerization kettle according to the cleaning water parameters include: Obtain the station cleaning time relationship and pre-cleaning station of the polymerization kettle; Determine the actual cleaning time based on the station cleaning time relationship and pre-cleaning station; Controlling the water supply device to supply water to the cleaning device according to the cleaning water parameter to clean the polymerization kettle, and obtaining the cleaning time of the cleaning device; Determine whether the cleaning time meets the requirements of the actual cleaning time; If it does not meet the requirements, the water supply device is controlled to supply water to the cleaning device according to the cleaning water parameters to clean the polymerization kettle, and the cleaning time of the cleaning device is obtained to make a cycle judgment; If it meets the requirements, the cleaning completion trigger signal will be output.

4. A method for cleaning a polymerization reactor according to claim 3, characterized in that: The steps of obtaining the station cleaning time relationship of the polymerization kettle include: Acquire the cleaning area image of the polymerization reactor; Dividing the cleaning area image according to the preset workstation area to determine the area detection image corresponding to the workstation area; Perform image recognition analysis on the regional detection image to determine the scaling area of ​​the workstation area; Analyze the fouling area to determine the area ratio; The area ratio and the preset total cleaning time are analyzed to determine the cleaning time relationship of the workstations in the workstation area.

5. A method for cleaning a polymerization reactor according to claim 2, characterized in that: The steps of controlling the resetting of the cleaning device include: When the number of cleaning stations meets the requirement of the total number of stations, the water supply device is controlled according to the preset pure water parameters to supply water to the preset reset device to clean the cleaning device; Controlling the cleaning device to move along a preset reset direction into a preset parking bin, and obtaining a reset feedback position signal of the cleaning device; When the reset feedback position signal meets the requirements of the preset parking position, the cleaning device, the water supply device and the reset device are controlled to stop; The preset isolation device is controlled to isolate the cleaning device in the parking bin.

6. A method for cleaning a polymerization reactor according to claim 1, characterized in that: The steps of obtaining the cleaning trigger signal of the polymerization kettle include: Obtaining a discharge completion trigger signal of the polymerization kettle; Acquire the detection pressure in the kettle based on the discharge completion trigger signal; Determine whether the detection pressure in the kettle meets the preset cleaning pressure requirements; If it does not meet the requirement, continue to obtain the detection pressure in the kettle for cyclic judgment; If it meets the requirements, the preset isolation device is controlled to open the preset parking bin to output a cleaning trigger signal.

7. A method for cleaning a polymerization reactor according to claim 6, characterized in that: The step of controlling the preset isolation device to open the preset parking compartment to output a cleaning trigger signal includes: Obtaining the opening detection angle of the isolation device; Determine whether the opening detection angle meets the preset opening angle requirement; If it meets the requirements, the cleaning trigger signal will be directly output, and the preset maintenance prompt information will be given; If not, the isolation device is controlled to open the parking compartment according to the preset opening trigger signal, and the opening trigger signal is obtained; A cleaning trigger signal is output based on the turned-on trigger signal.

8. A polymerization kettle cleaning system, characterized in that: include: An acquisition module, used for acquiring a cleaning trigger signal and a position feedback signal; A memory for storing a program of a polymerization reactor cleaning method according to any one of claims 1 to 7; The program in the memory can be loaded and executed by the processor to implement a polymerization kettle cleaning method as described in any one of claims 1 to 7.

9. An intelligent terminal, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program which can be loaded by the processor and executes a method for cleaning a polymerization kettle as claimed in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The invention stores a computer program which can be loaded by a processor and executes a polymerization reactor cleaning method according to any one of claims 1 to 7.

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