A treatment method, system, terminal and medium for preventing blockage of VOCs pipelines

Abstract

The present application relates to a treatment method, system, terminal and medium for preventing blockage of VOCs pipelines. The treatment method includes: receiving the actual negative pressure value sent by a pressure transmitter; judging whether the actual negative pressure value is less than the stable negative pressure value and judging whether the opening degree of the regulating valve changes; if the actual negative pressure value is less than the stable negative pressure value and the opening degree of the regulating valve does not change, then opening the steam valve to supplement steam into the pipeline; the stable negative pressure value is the negative pressure value when the pipeline is clean and the flow rate is stable; during the process of supplementing steam, receiving the actual temperature value sent by a temperature sensor installed on the pipeline; judging whether the actual temperature value reaches the first temperature threshold; if so, closing the steam valve; if not, continuing to supplement steam until the actual temperature value reaches the first temperature threshold. The present application has the beneficial effects of improving the pipeline dredging efficiency and reducing the labor cost when the pipeline is blocked.

Description

Technical Field

[0001] The present application relates to the technical field of VOCs pipeline anti-blocking, and in particular to a treatment method, system, terminal and medium for VOCs pipeline anti-blocking. Background Art

[0002] In a chemical production area such as a tar factory, gases VOCs released from multiple chemical storage tanks are usually collected through pipelines. Since there may be impurities such as tar in the VOCs gas, when the VOCs gas is transported in the pipeline, the tar will condense in the pipeline, resulting in pipeline blockage and thus affecting the transmission of the VOCs gas.

[0003] In the related art, when a pipeline blockage is found, the pipeline is usually directly dredged and cleaned manually; the inventor found that when using this method for pipeline blockage, the dredging efficiency is relatively low, and it often takes a long time to dredge the pipeline, and the labor cost is relatively high. Summary of the Invention

[0004] In order to improve the pipeline dredging efficiency and reduce the labor cost when the pipeline is blocked, the present application provides a treatment method, system, terminal and medium for VOCs pipeline anti-blocking.

[0005] In a first aspect, the present application provides a treatment method for VOCs pipeline anti-blocking, adopting the following technical solution:

[0006] A treatment method for VOCs pipeline anti-blocking includes:

[0007] Receiving the actual negative pressure value sent by a pressure transmitter installed on the pipeline;

[0008] Judging whether the actual negative pressure value is less than the stable negative pressure value, and judging whether the opening degree of a regulating valve installed on the pipeline for regulating the pipeline flow changes;

[0009] If the actual negative pressure value is less than the stable negative pressure value and the opening degree of the regulating valve does not change, then open the steam valve to supplement steam into the pipeline; the stable negative pressure value is the negative pressure value when the pipeline is clean and the flow is stable;

[0010] During the process of supplementing steam, receiving the actual temperature value sent by a temperature sensor installed on the pipeline;

[0011] Judging whether the actual temperature value reaches a first temperature threshold;

[0012] If so, close the steam valve;

[0013] If not, continue to supplement steam until the actual temperature value reaches the first temperature threshold.

[0014] By adopting the above technical solution, since after the tar condenses in the pipeline, when the opening of the regulating valve remains unchanged, the actual negative pressure value inside the pipeline detected by the pressure transmitter will become smaller; therefore, when the actual negative pressure value is less than the stable negative pressure value and the opening of the regulating valve remains unchanged, steam needs to be supplemented to melt the tar so that it can be discharged following the gas; during the process of supplementing steam, the actual temperature value detected by the temperature sensor is received, and it is judged whether the actual temperature value reaches the first temperature value. If it reaches, it indicates that the tar is very likely to be melted, so the steam valve can be closed. Since it is possible to determine whether the tar has condensed by comparing the actual negative pressure value with the stable negative pressure value, steam can be supplemented in a timely manner when the tar is suspected to have condensed, so that the pipeline can be cleaned in a timely manner after being blocked, reducing the impact on gas transportation; since there is no need for manual dredging and cleaning of the pipeline, the pipeline dredging efficiency is improved and the labor cost is reduced.

[0015] Optionally, after the actual temperature value reaches the first temperature threshold and before closing the steam valve, it further includes:

[0016] Judging whether the actual negative pressure value reaches the stable negative pressure value;

[0017] If so, close the steam valve;

[0018] If not, continue to supplement steam until the actual negative pressure value reaches the stable negative pressure value.

[0019] By adopting the above technical solution, by combining two conditions of the actual temperature inside the pipeline and the actual negative pressure value, it is determined whether the pipeline is clean, improving the accuracy of judgment.

[0020] Optionally, the processing method further includes:

[0021] Obtain the ambient temperature outside the pipeline;

[0022] Judge whether the ambient temperature is less than the ambient temperature threshold;

[0023] If so, control the tracing valve to open to heat the pipeline;

[0024] When the pipeline is heated, judge whether the actual temperature value reaches the second temperature threshold;

[0025] If so, control the tracing valve to close.

[0026] By adopting the above technical solution, since impurities in the gas inside the pipeline are prone to crystallization when the external environment is relatively cold, especially in winter, which affects the gas transportation of the pipeline, it is necessary to monitor the environmental temperature outside the pipeline. When the environmental temperature is lower than the environmental temperature threshold, the tracing heat valve is controlled to open to heat the pipeline, so that the actual temperature inside the pipeline is maintained at the second temperature threshold, avoiding the pipeline being clean.

[0027] Optionally, the processing method further includes:

[0028] Obtain the current error value between the actual negative pressure value and the stable negative pressure value;

[0029] From the stored historical processing situation table, screen the historical error value most similar to the current error value;

[0030] Retrieve the historical steam flow rate and historical steam pressure associated with the historical error value;

[0031] Adjust the steam valve opening of the steam valve according to the historical steam flow rate and the historical steam pressure.

[0032] By adopting the above technical solution, the historical processing situation characterizes the historical processing situation of the pipeline, including historical error value data and the historical steam flow rate and historical steam pressure required to eliminate the error associated therewith. After obtaining the current error value, directly screen the historical error value closest to the current error value from the historical processing situation table, and then directly adjust the opening of the steam valve with the historical steam flow rate associated with the historical error value, so that the steam replenished into the pipeline can quickly melt the tar and improve the processing efficiency.

[0033] Optionally, the step of adjusting the steam valve opening of the steam valve according to the historical steam flow rate and the historical steam pressure includes:

[0034] Judge whether the absolute value of the error value is not greater than the error threshold;

[0035] If so, retrieve the first valve opening adjustment model;

[0036] Input the historical steam flow rate, the historical steam pressure and the error value into the first valve opening adjustment model to obtain the first valve opening to be adjusted;

[0037] Open the steam valve according to the first valve opening to be adjusted.

[0038] By adopting the above technical solution, if the error value is not greater than the error threshold, it indicates that the error is small. Therefore, the historical steam flow rate, historical steam pressure, and error value can be input into the pre-constructed first valve opening adjustment model to obtain the first valve opening to be adjusted, and then the steam valve can be opened according to the first valve opening to be adjusted, thereby further improving the processing efficiency.

[0039] Optionally, the processing method further includes:

[0040] If the error value is greater than the error threshold, the second valve opening adjustment model is retrieved;

[0041] The historical steam flow rate, the historical steam pressure, and the error value are input into the second valve opening adjustment model to obtain the second valve opening to be adjusted;

[0042] The steam valve is opened according to the second valve opening to be adjusted.

[0043] By adopting the above technical solution, if the error value is greater than the error threshold, it indicates that the error is large. Therefore, the historical steam flow rate, historical steam pressure, and error value can be input into the pre-constructed second valve opening adjustment model to obtain the second valve opening to be adjusted, and then the steam valve can be opened according to the second valve opening to be adjusted. Different valve opening adjustment models make the opening of the steam valve more suitable for different degrees of pipeline blockage.

[0044] Optionally, the first valve opening adjustment model is ; where Q is the steam flow rate, C is a coefficient related to the characteristics of the steam valve, V is the steam valve opening, P s is the steam pressure, P 实 is the actual negative pressure value, P 稳 is the stable negative pressure value;

[0045] The second valve opening adjustment model is: ; where K is the power exponent, K > 0 and K ≠ 1.

[0046] In a second aspect, the present application provides a processing system for preventing blockage of a VOCs pipeline, adopting the following technical solution:

[0047] A processing system for preventing blockage of a VOCs pipeline includes:

[0048] A data receiving module, configured to receive the actual negative pressure value sent by a pressure transmitter installed on the pipeline;

[0049] A judgment module, configured to judge whether the actual negative pressure value is less than the stable negative pressure value, and judge whether the adjustment valve opening of the adjustment valve installed on the pipeline for adjusting the pipeline flow rate changes;

[0050] A control module, configured to control the steam valve to open to supplement steam into the pipeline when the actual negative pressure value is less than the stable negative pressure value and the opening degree of the regulating valve remains unchanged; the stable negative pressure value is the negative pressure value when the pipeline is clean and the flow rate is stable.

[0051] The data receiving module is further configured to receive the actual temperature value sent by a temperature sensor installed in the pipeline during the process of supplementing steam.

[0052] The judging module is further configured to judge whether the actual temperature value reaches a first temperature threshold; if so, the control module controls the steam valve to close; if not, continue to supplement steam until the actual temperature value reaches the first temperature threshold.

[0053] By adopting the above technical solution, since after the tar condenses in the pipeline and the opening degree of the regulating valve remains unchanged, the actual negative pressure value in the pipeline detected by the pressure transmitter will become smaller; therefore, when the actual negative pressure value is less than the stable negative pressure value and the opening degree of the regulating valve remains unchanged, it is necessary to supplement steam to melt the tar so as to discharge it following the gas; during the process of supplementing steam, receive the actual temperature value detected by the temperature sensor and judge whether the actual temperature value reaches the first temperature value. If it reaches, it indicates that the tar is very likely to be melted, so the steam valve can be closed. Since it is possible to determine whether the tar condenses by comparing the actual negative pressure value with the stable negative pressure value, steam can be supplemented in time when the tar is suspected of condensing, so that the pipeline can be cleaned in time after being blocked, reducing the impact on gas transportation.

[0054] In a third aspect, the present application provides a terminal, adopting the following technical solution:

[0055] A terminal, comprising:

[0056] A memory storing a processing program for preventing blockage of the VOCs pipeline;

[0057] A processor, configured to execute the program stored on the memory to implement the steps of the above-mentioned method for preventing blockage of the VOCs pipeline.

[0058] In a fourth aspect, the present application provides a computer-readable storage medium, adopting the following technical solution:

[0059] A computer-readable storage medium storing a computer program that can be loaded and executed by a processor to implement the above-mentioned method for preventing blockage of the VOCs pipeline.

[0060] In summary, the present application has at least the following beneficial effects:

[0061] 1. The purpose of receiving the actual negative pressure value and determining whether the actual negative pressure value is less than the stable negative pressure value is that when tar condenses in the pipeline and the opening of the regulating valve remains unchanged, the actual negative pressure value detected by the pressure transmitter in the pipeline will become smaller at this time. Therefore, when the actual negative pressure value is less than the stable negative pressure value and the opening of the regulating valve remains unchanged, steam needs to be supplemented to melt the tar so that it can be discharged following the gas. During the process of supplementing steam, the actual temperature value detected by the temperature sensor is received, and it is determined whether the actual temperature value reaches the first temperature value. If it reaches, it indicates that the tar is very likely to be melted, so the steam valve can be closed. By comparing the actual negative pressure value with the stable negative pressure value, it is possible to determine whether the tar has condensed, so that when the tar is suspected of condensing, steam can be supplemented in a timely manner, enabling the pipeline to be cleaned in a timely manner after blockage, reducing the impact on gas transportation; since there is no need for manual dredging of the pipeline, the pipeline dredging efficiency is improved and the labor cost is reduced.

[0062] 2. The purpose of obtaining the ambient temperature outside the pipeline and determining whether the ambient temperature is less than the ambient temperature threshold is that when the external environment is cold, especially in winter, impurities in the gas in the pipeline are likely to crystallize, affecting the pipeline's transportation of gas. Therefore, it is necessary to monitor the ambient temperature outside the pipeline. When the ambient temperature is less than the ambient temperature threshold, the tracing heating valve is controlled to open to heat the pipeline, so that the actual temperature inside the pipeline is maintained at the second temperature threshold to prevent the pipeline from getting blocked.

[0063] 3. The purpose of obtaining the current error value between the actual negative pressure value and the stable negative pressure value is that the historical error value closest to the current error value can be directly screened from the historical processing situation table, and then the opening of the steam valve can be adjusted directly with the historical steam flow rate associated with this historical error value, so that the steam supplemented into the pipeline can quickly melt the tar and improve the processing efficiency. Description of the Drawings

[0064] Figure 1 is a schematic diagram of the pipeline structure of the processing pipeline in this application;

[0065] Figure 2 is a flowchart of the implementation manner of Embodiment 1 of the method in this application;

[0066] Figure 3 is a flowchart of another implementation manner of the method embodiment in this application;

[0067] Figure 4 is a schematic table diagram of part of the data in the historical processing situation table of this application;

[0068] Figure 5 is a flowchart of a specific step of S240;

[0069] Figure 6 It is a structural block diagram of an embodiment of the system of the present application.

[0070] Explanation of reference numerals in the drawings: 101, data receiving module; 102, judgment module; 103, control module; 201, steam valve; 202, air supplement pipeline; 203, pressure transmitter; 204, first temperature sensor; 205, regulating valve. Specific implementation manners

[0071] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will combine the accompanying Figure 1 - accompanying Figure 6 , and clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0072] The present application provides a processing pipeline for preventing blockage of VOCs pipelines. Referring to Figure 1 , the processing pipeline includes a steam valve 201, a regulating valve 205, an air supplement pipeline 202, a pressure transmitter 203, a first temperature sensor 204, a second temperature sensor (not shown in the figure), a tracing valve (not shown in the figure), and a tracing pipeline (not shown in the figure).

[0073] Among them, the pressure transmitter 203 is installed at the inlet of the VOCs pipeline for detecting the negative pressure in the pipeline. The regulating valve 205 is installed at the outlet of the VOCs pipeline for regulating the flow rate of the VOCs pipeline. The first temperature sensor 204 is installed on the VOCs pipeline for detecting the actual temperature in the pipeline and is arranged close to the regulating valve 205. The second temperature sensor is installed outside the pipeline for detecting the ambient temperature outside the pipeline. The tracing pipeline is used to heat the VOCs pipeline. The tracing valve is installed on the tracing pipeline for opening and closing the tracing pipeline. The air supplement pipeline 202 is connected to the inlet of the VOCs pipeline for supplementing steam into the pipeline. The steam valve 201 is installed on the air supplement pipeline 202 for opening and closing the air supplement pipeline 202 and regulating the steam flow rate in the air supplement pipeline 202.

[0074] The pressure transmitter 203, steam valve 201, regulating valve 205, first temperature sensor 204, second temperature sensor, and tracing valve are all communicatively connected to the VOCs pipeline anti-blocking treatment system. When the pressure transmitter 203 detects that the actual negative pressure value is less than the negative pressure value before the pipeline is blocked, and when the opening degree of the regulating valve 205 does not change, the VOCs pipeline anti-blocking treatment system controls the steam valve 201 to open to supplement steam into the pipeline. During the process of supplementing steam, the first temperature sensor 204 detects the actual temperature inside the pipeline. When the actual temperature value reaches the first temperature threshold and the actual negative pressure value reaches the stable negative pressure value, the VOCs pipeline anti-blocking treatment system controls the steam valve 201 to close, and the pipeline blockage treatment is completed.

[0075] In addition, the second temperature sensor detects the ambient temperature outside the pipeline. When the ambient temperature value is less than the ambient temperature threshold, the VOCs pipeline anti-blocking treatment system controls the tracing valve to open, and the tracing pipeline heats the VOCs pipeline. After the actual temperature value inside the pipeline reaches the second temperature threshold, the VOCs pipeline anti-blocking treatment system controls the tracing valve to close.

[0076] The first embodiment of the present application discloses a VOCs pipeline anti-blocking treatment method. Referring to Figure 2 , as an implementation manner of this treatment method, this treatment method may include S110 - S190:

[0077] S110, receiving the actual negative pressure value sent by the pressure transmitter 203 installed on the pipeline;

[0078] S120, judging whether the actual negative pressure value is less than the stable negative pressure value, and judging whether the opening degree of the regulating valve 205 installed on the pipeline for regulating the pipeline flow changes;

[0079] S130, if the actual negative pressure value is less than the stable negative pressure value and the opening degree of the regulating valve 205 does not change, then open the steam valve 201 to supplement steam into the pipeline; the stable negative pressure value is the negative pressure value when the pipeline is clean and the flow is stable;

[0080] S140, during the process of supplementing steam, receiving the actual temperature value sent by the temperature sensor installed on the pipeline;

[0081] S150, judging whether the actual temperature value reaches the first temperature threshold;

[0082] S160, if not, then continue to supplement steam and execute S150;

[0083] S170, if so, then judge whether the actual negative pressure value reaches the stable negative pressure value;

[0084] S180, if so, close the steam valve 201;

[0085] S190, if not, continue to supply steam and execute S170.

[0086] Further, referring to Figure 3 , this processing method may further include S210 - S240:

[0087] S210, obtain the current error value between the actual negative pressure value and the stable negative pressure value;

[0088] S220, from the stored historical processing situation table, filter out the historical error value most similar to the current error value;

[0089] S230, retrieve the historical steam flow rate and historical steam pressure associated with the historical error value;

[0090] S240, adjust the steam valve opening of the steam valve 201 according to the historical steam flow rate and historical steam pressure.

[0091] Specifically, some data in the historical processing situation table at the proximal end of the pipeline can be referred to Figure 4 as shown; the historical processing situation table can be updated according to each pipeline processing. The historical processing situation table includes information such as the processing serial number, stable negative pressure value, actual negative pressure value, error value, steam flow rate, steam pressure, and data status, etc.; the error value is negative. The processing serial number is used to identify the order of each pipeline processing, facilitating recording and querying. The data status indicates whether the data has been verified and is normal.

[0092] After obtaining the current error value, subtract the current error value from the verified historical error values in the historical processing situation table in turn, and take the absolute value. The historical error value with the smallest absolute value is the historical error value most similar to the current error value.

[0093] Referring to Figure 5 , a specific step of S240 is S241 - S247:

[0094] S241, determine whether the absolute value of the current error value is greater than the error threshold;

[0095] S242, if so, retrieve the second valve opening adjustment model;

[0096] S243, input the historical steam flow rate, historical steam pressure, and current error value into the second valve opening adjustment model to obtain the second valve opening to be adjusted;

[0097] S244, open the steam valve 201 according to the second valve opening to be adjusted;

[0098] S245. If not, retrieve the first valve opening adjustment model.

[0099] S246. Input the historical steam flow rate, historical steam pressure, and current error value into the first valve opening adjustment model to obtain the first valve opening to be adjusted.

[0100] S247. Open the steam valve 201 according to the first valve opening to be adjusted.

[0101] Specifically, the first valve opening adjustment model is ; where Q is the steam flow rate, C is a coefficient related to the characteristics of the steam valve 201, V is the steam valve opening, P s is the steam pressure, P 实 is the actual negative pressure value, P 稳 is the stable negative pressure value, and E is the error value.

[0102] The second valve opening adjustment model is: ; where K is the power exponent, K > 0 and K ≠ 1. Both K and C can be calculated based on the historical data in the historical processing table. It should be noted that 0 ≤ V ≤ 1, where 1 represents the steam valve is fully open and 0 represents the steam valve 201 is fully closed. If it is calculated that V > 1, then V is set to 1, that is, the steam valve 201 is fully opened; if it is calculated that V < 0, then V is set to 0, that is, the steam valve 201 is fully closed.

[0103] For example, C is 1.5, K is 1.5, the stable negative pressure value P 稳 is -500 KPa, P 实 the actual negative pressure value is -510 KPa, and the current error value E is -10 KPa; if the absolute value of the current error value is greater than the error threshold, then based on the most similar historical error value, the historical steam flow rate Q is determined to be 10 m 3 / h, the historical steam pressure P s is 600 KPa, and the above data is input into the second valve opening adjustment model , and V ≈ 0.63 is obtained. After rounding up, V = 0.7, and then it is converted into a rotation angle to control the opening degree of the steam valve 201.

[0104] In addition, if the absolute value of the current error value is not greater than the error threshold, then the above data is input into the first valve opening adjustment model , and V ≈ 0.7 is obtained. After rounding up, V = 0.8, and then it is converted into a rotation angle to control the opening degree of the steam valve 201.

[0105] The implementation principle of this embodiment is:

[0106] Receive the actual negative pressure value, and determine whether the actual negative pressure value is less than the stable negative pressure value, and determine whether the opening of the regulating valve 205 has changed. If the actual negative pressure value is less than the stable negative pressure value and the opening of the regulating valve 205 has not changed, then open the steam valve 201 to supplement steam into the pipeline. During the process of supplementing steam, receive the actual temperature value, and determine whether the actual temperature value reaches the first temperature threshold. If so, continue to determine whether the actual negative pressure value reaches the stable negative pressure value. If so, close the steam valve 201;

[0107] In addition, before opening the steam valve 201, obtain the current error value between the actual negative pressure value and the stable negative pressure value, screen the historical error value most similar to the current error value from the historical processing situation table, and retrieve the associated historical steam flow and historical steam pressure. Then determine whether the absolute value of the current error is greater than the error threshold. If so, retrieve the second valve opening adjustment model, and input the historical steam flow, historical steam pressure, and the current error value into the second valve opening adjustment model to obtain the valve opening of the steam valve 201, and thus open the steam valve 201 according to this valve opening.

[0108] Based on the above method embodiments, the second embodiment of the present application discloses a treatment system for preventing blockage of VOCs pipelines. Refer to Figure 6 , the treatment system may include:

[0109] A data receiving module 101, configured to receive the actual negative pressure value sent by the pressure transmitter 203 installed on the pipeline;

[0110] A judgment module 102, configured to judge whether the actual negative pressure value is less than the stable negative pressure value, and judge whether the opening of the regulating valve 205 of the regulating valve installed on the pipeline for regulating the pipeline flow has changed;

[0111] A control module 103, configured to control the steam valve 201 to open to supplement steam into the pipeline when the actual negative pressure value is less than the stable negative pressure value and the opening of the regulating valve has not changed; the stable negative pressure value is the negative pressure value when the pipeline is clean and the flow is stable;

[0112] The data receiving module 101 is further configured to receive the actual temperature value sent by the temperature sensor installed in the pipeline during the process of supplementing steam;

[0113] The judgment module 102 is further configured to judge whether the actual temperature value reaches the first temperature threshold; if so, the control module 103 controls the steam valve 201 to close; if not, continue to supplement steam until the actual temperature value reaches the first temperature threshold.

[0114] The modules of the VOCs pipeline anti-blocking processing system correspond one by one to the VOCs pipeline anti-blocking processing method, and will not be elaborated here.

[0115] The third embodiment of the present application provides a terminal. As an implementation manner of the terminal, the terminal may include: a memory and a processor; wherein,

[0116] The memory is used to store the above-mentioned VOCs pipeline anti-blocking processing program;

[0117] The processor is used to execute the program stored on the memory to implement the steps of the above-mentioned VOCs pipeline anti-blocking processing method.

[0118] Among them, the memory can be communicatively connected to the processor through a communication bus, and the communication bus can be an address bus, a data bus, a control bus, etc.

[0119] In addition, the memory may include a random access memory (RAM), and may also include a non-volatile memory (NVM), such as at least one disk memory.

[0120] And the processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0121] The fourth embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded and executed by a processor to implement the above-mentioned VOCs pipeline anti-blocking processing method.

[0122] The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or a data center that integrates one or more available media. Among them, the available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid-state drive), etc.

[0123] The above are all the preferred embodiments of the present application, which do not limit the protection scope of the present application in turn. Any feature disclosed in this specification (including the abstract and drawings), unless specifically described, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically described, each feature is only an example of a series of equivalent or similar features.

Claims

1. A method for preventing VOCs pipeline blockage, characterized in that: include: Receiving an actual negative pressure value sent by a pressure transmitter (203) installed on the pipeline; Determining whether the actual negative pressure value is less than the stable negative pressure value, and determining whether the opening of a regulating valve (205) installed on the pipeline for regulating the pipeline flow has changed; If the actual negative pressure value is less than the stable negative pressure value, and the opening of the regulating valve (205) does not change, the steam valve (201) is opened to add steam into the pipeline; the stable negative pressure value is the negative pressure when the pipeline is clean and the flow is stable; During the process of adding steam, the actual temperature value sent by the temperature sensor installed on the pipeline is received; Determining whether the actual temperature value reaches a first temperature threshold; If yes, determining whether the actual negative pressure value reaches a stable negative pressure value; If the actual negative pressure value reaches the stable negative pressure value, closing the steam valve (201); If the actual negative pressure value does not reach the stable negative pressure value, continue to add steam until the actual negative pressure value reaches the stable negative pressure value; If not, continue to add steam until the actual temperature value reaches the first temperature threshold; The processing method also includes: Obtaining a current error value between the actual negative pressure value and the stable negative pressure value; Filtering the historical error value most similar to the current error value from the stored historical processing status table; Retrieving a historical steam flow rate and a historical steam pressure associated with the historical error value; Determine whether the absolute value of the error value is not greater than the error threshold; If yes, then the first valve opening adjustment model is retrieved; Inputting the historical steam flow, the historical steam pressure and the error value into the first valve opening adjustment model to obtain the first valve opening to be adjusted; Opening the steam valve (201) according to the first adjustable valve opening; If not, then call up the second valve opening adjustment model; Inputting the historical steam flow, the historical steam pressure and the error value into the second valve opening adjustment model to obtain the second valve opening to be adjusted; The steam valve (201) is opened according to the second adjustable valve opening.

2. A VOCs pipeline anti-blocking treatment method according to claim 1, characterized in that: The processing method also includes: Get the ambient temperature outside the pipeline; Determining whether the ambient temperature is less than an ambient temperature threshold; If yes, the heating valve is controlled to open to heat the pipeline; When the pipeline is heated, determining whether the actual temperature reaches a second temperature threshold; If so, the heating valve is controlled to close.

3. A VOCs pipeline anti-blocking treatment method according to claim 1, characterized in that: The first valve opening model is: ; Where Q is the steam flow, C is the coefficient related to the steam valve characteristics, V is the steam valve opening, is the steam pressure, is the actual negative pressure value, To stabilize the negative pressure value; the second valve opening model is: ; Wherein, K is the power exponent, K>0 and K≠1.

4. A VOCs pipeline anti-blocking treatment system, characterized in that: The VOCs pipeline anti-blocking treatment method according to any one of claims 1 to 3 is implemented, and the VOCs pipeline anti-blocking treatment system comprises: A data receiving module (101) is used to receive an actual negative pressure value sent by a pressure transmitter (203) installed on the pipeline; A judgment module (102) is used to judge whether the actual negative pressure value is less than the stable negative pressure value, and to judge whether the opening of a regulating valve (205) installed on the pipeline for regulating the flow of the pipeline has changed; The control module (103) is used to control the steam valve (201) to open when the actual negative pressure value is less than the stable negative pressure value and the opening of the regulating valve (205) does not change, so as to replenish steam into the pipeline; the stable negative pressure value is the negative pressure when the pipeline is clean and the flow rate is stable; The data receiving module (101) is also used to receive an actual temperature value sent by a temperature sensor installed in the pipeline during the process of adding steam; The judgment module (102) is further used to judge whether the actual temperature value reaches a first temperature threshold; if so, the control module (103) controls the steam valve (201) to close; if not, steam is continuously added until the actual temperature value reaches the first temperature threshold.

5. A terminal, characterized in that: include: A memory storing a processing program for preventing VOCs pipeline blockage; A processor is used to execute the program stored in the memory to implement the steps of the VOCs pipeline anti-blocking treatment method as described in any one of claims 1-3.

6. A computer-readable storage medium, characterized in that: A computer program is stored which can be loaded by a processor and execute a method for preventing VOCs pipeline blockage as described in any one of claims 1 to 3.

Images