Ice blockage prevention method and equipment for universal large-diameter anti-regulating valve

Abstract

The invention provides a universal large-caliber anti-regulating valve ice blockage prevention method and equipment. The universal large-caliber anti-regulating valve ice blockage prevention method comprises the following steps: constructing a methanol injection amount big data sample; according to the methanol injection amount big data sample, training to obtain a methanol theoretical injection amount prediction model; and according to the theoretical methanol injection quantity prediction model, the optimal methanol injection quantity is calculated by calculating field parameter data. According to the technical scheme, a methanol injection amount big data sample is constructed; according to the methanol injection amount big data sample, training to obtain a methanol theoretical injection amount prediction model; according to the theoretical methanol injection quantity prediction model, the optimal methanol injection quantity is calculated through field parameter data for calculation; the alcohol injection measures are optimized, the alcohol injection amount is reasonably adjusted, and energy conservation and consumption reduction are achieved while ice blockage events are prevented.

Description

Background Art

[0002] During the initial operation of the newly commissioned transfer branch, due to the problem of excessive water dew point, the regulating valve was easily blocked by ice, and even the pipeline was blocked by ice, resulting in short supply or supply interruption. For the problem of ice blockage of the pressure regulating pry, anti-ice blockage measures such as alcohol injection were adopted, which effectively eliminated the ice blockage phenomenon. However, there has been no theoretical support for the calculation of the amount of alcohol injection, and manual adjustment was made based on field experience, resulting in a certain degree of waste of methanol consumables. Summary of the invention

[0003] The present application provides a method and device for preventing ice blockage of a universal large-diameter anti-regulating valve, which is used to optimize alcohol injection measures, reasonably adjust the alcohol injection amount, and achieve energy saving and consumption reduction while preventing ice blockage events.

[0004] In a first aspect, a general large-caliber anti-icing and anti-blocking method for an anti-regulating valve is provided, comprising the following steps:

[0005] Construct a big data sample of methanol injection volume;

[0006] According to the methanol injection amount big data sample, a methanol theoretical injection amount prediction model is trained;

[0007] According to the methanol theoretical injection amount prediction model, the methanol injection amount is calculated by calculating the field parameter data.

[0008] In the above technical scheme, a big data sample of methanol injection amount is constructed; a methanol theoretical filling amount prediction model is trained based on the big data sample of methanol injection amount; the optimal methanol injection amount is calculated by calculating the field parameter data based on the methanol theoretical filling amount prediction model; the alcohol injection measures are optimized, and the alcohol injection amount is reasonably adjusted to achieve energy saving and consumption reduction while preventing ice blockage incidents.

[0009] In a specific embodiment, it also includes:

[0010] According to the correction field parameter data, the alcohol injection amount is corrected in real time, and the methanol injection amount is automatically adjusted to complete the design of the universal large-diameter anti-regulating valve anti-icing and anti-blocking equipment.

[0011] In a specific embodiment, it also includes:

[0012] Real-time monitoring and early alarm of water dew point.

[0013] In a specific implementation scheme, the steps of real-time monitoring and early warning of water dew point are specifically as follows:

[0014] By comparing the water dew point with the outlet temperature, the water dew point can be monitored in real time and early alarm can be given.

[0015] In a specific implementation scheme, the steps of constructing a big data sample of methanol injection volume are specifically as follows:

[0016] The process of methanol injection in the transfer branch is simulated to construct a big data sample of methanol injection quantity.

[0017] In a specific implementation scheme, the steps of training a methanol theoretical injection amount prediction model based on the methanol injection amount big data sample are as follows:

[0018] According to the methanol injection amount big data sample, a BP artificial neural network is trained according to different parameter data to obtain a methanol theoretical injection amount prediction model.

[0019] In a specific implementation scheme, the step of automatically adjusting the amount of methanol injection is specifically as follows:

[0020] The number of alcohol injection pumps is adjusted, and the amount of methanol injection is automatically adjusted.

[0021] In the second aspect, a general large-caliber anti-icing and anti-blocking device for an anti-regulating valve is provided, comprising: a control system, a regulating system, a metering system and an alcohol injection pipeline, wherein:

[0022] The control system is used to calculate the methanol injection amount and control the methanol injection work;

[0023] The regulating system is used to regulate the amount of methanol injected;

[0024] The metering system is used to measure the amount of methanol injected;

[0025] The alcohol injection pipeline is used to connect to the transfer branch to perform alcohol injection work.

[0026] In a specific implementation scheme, the control system, the regulating system, the metering system and the alcohol injection pipeline are integrated into one.

[0027] In a specific embodiment, it also includes a water dew point monitoring and early warning module, wherein:

[0028] The water dew point monitoring and early warning module is used to perform real-time monitoring and early warning of the water dew point by comparing the water dew point with the exit temperature.

[0029] In the above technical scheme, a big data sample of methanol injection amount is constructed; a methanol theoretical filling amount prediction model is trained based on the big data sample of methanol injection amount; the optimal methanol injection amount is calculated by calculating the field parameter data based on the methanol theoretical filling amount prediction model; the alcohol injection measures are optimized, and the alcohol injection amount is reasonably adjusted to achieve energy saving and consumption reduction while preventing ice blockage incidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A flowchart of a method for preventing ice blockage of a general large-caliber anti-regulating valve provided in an embodiment of the present application;

[0031] Figure 2 A structural schematic diagram of a hysys model of a universal large-caliber anti-icing and anti-blocking method for an anti-regulating valve provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of the correlation of the prediction model provided in the embodiment of the present application;

[0033] Figure 4 A schematic diagram of the prediction model MSE provided in an embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a BP neural network provided in an embodiment of the present application;

[0035] Figure 6 A schematic diagram of the structure of a universal large-caliber anti-icing and anti-blocking device for an anti-regulating valve provided in an embodiment of the present application;

[0036] Figure 7 An electrical block diagram of a general large-caliber anti-icing and anti-blocking device for an anti-regulating valve provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of program blocks of a water dew point monitoring and early warning module provided in an embodiment of the present application;

[0038] Fig. 9 A schematic diagram of the host computer setting interface provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0040] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0041] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0042] To facilitate understanding of the general large-caliber anti-icing and blocking method and equipment for anti-regulating valves provided in the embodiments of the present application, its application scenario is first explained. The general large-caliber anti-icing and blocking method and equipment for anti-regulating valves provided in the embodiments of the present application are used to optimize the alcohol injection measures, reasonably adjust the amount of alcohol injection, and achieve energy saving and consumption reduction while preventing ice blocking incidents. During the initial operation of the newly commissioned transfer branch, due to the problem of excessive water dew point, it is easy to cause ice blockage of the regulating valve or even ice blockage of the pipeline during gas distribution, resulting in short supply or supply interruption. In early 2022, due to the excessive water content of the new gas pipeline transfer gas source, the Ansha Station branch branch experienced a pressure regulating pry ice blockage incident. In response to this emergency, the branch company took anti-icing and blocking measures such as alcohol injection, which effectively eliminated the ice blocking phenomenon. However, there has been no theoretical support for the calculation of the amount of alcohol injection, and manual adjustment based on on-site experience has resulted in a certain degree of waste of methanol consumables. To this end, the embodiment of the present application provides a general large-caliber anti-regulating valve anti-icing blockage method and device to optimize the alcohol injection measures, reasonably adjust the alcohol injection amount, and achieve energy saving and consumption reduction while preventing ice blockage events. The following is a detailed description of the embodiment in conjunction with specific drawings.

[0043] refer to Figures 1 to 9 , Figure 1 A flowchart of a method for preventing ice blockage of a general large-caliber anti-regulating valve provided in an embodiment of the present application; Figure 2 A structural schematic diagram of a hysys model of a universal large-caliber anti-icing and anti-blocking method for an anti-regulating valve provided in an embodiment of the present application; Figure 3 A schematic diagram of the correlation of the prediction model provided in the embodiment of the present application; Figure 4 A schematic diagram of the prediction model MSE provided in an embodiment of the present application; Figure 5 A schematic diagram of the structure of a BP neural network provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a universal large-caliber anti-icing and anti-blocking device for an anti-regulating valve provided in an embodiment of the present application; Figure 7 An electrical block diagram of a general large-caliber anti-icing and anti-blocking device for an anti-regulating valve provided in an embodiment of the present application; Figure 8 A schematic diagram of program blocks of a water dew point monitoring and early warning module provided in an embodiment of the present application; Fig. 9 A schematic diagram of the host computer setting interface provided in an embodiment of the present application.

[0044] exist Figure 1 In the embodiment of the present application, a general large-caliber anti-icing and anti-blocking method for an anti-regulating valve is provided, comprising the following steps:

[0045] Construct a big data sample of methanol injection volume;

[0046] According to the methanol injection amount big data sample, a methanol theoretical injection amount prediction model is trained;

[0047] According to the methanol theoretical injection amount prediction model, the optimal methanol injection amount is calculated by calculating the field parameter data, wherein the parameter data include the distribution pressure, temperature, distribution amount, and water content of natural gas.

[0048] In the above technical scheme, a big data sample of methanol injection amount is constructed; a methanol theoretical filling amount prediction model is trained based on the big data sample of methanol injection amount; the optimal methanol injection amount is calculated by calculating the field parameter data based on the methanol theoretical filling amount prediction model; the alcohol injection measures are optimized, and the alcohol injection amount is reasonably adjusted to achieve energy saving and consumption reduction while preventing ice blockage incidents.

[0049] In a specific embodiment, it also includes:

[0050] According to the correction field parameter data, the optimal alcohol injection amount is corrected in real time, and the methanol injection amount is automatically adjusted to complete the design of the universal large-diameter anti-regulating valve anti-icing and anti-blocking equipment.

[0051] It should be noted that the field parameter data used for calculation refers to the existing historically collected field parameter data, or the historical field parameter data after sampling; the field parameter data used for correction refers to the field parameter data collected in real time, or the field parameter data collected in real time after sampling.

[0052] In a specific embodiment, it also includes:

[0053] Real-time monitoring and early alarm of water dew point.

[0054] In a specific implementation scheme, the steps of real-time monitoring and early warning of water dew point are specifically as follows:

[0055] By comparing the water dew point with the outlet temperature, the water dew point can be monitored in real time and early alarm can be given.

[0056] In a specific implementation scheme, the steps of constructing a big data sample of methanol injection volume are specifically as follows:

[0057] The process of methanol injection in the transfer branch is simulated to construct a big data sample of methanol injection quantity.

[0058] In a specific implementation scheme, the steps of training a methanol theoretical injection amount prediction model based on the methanol injection amount big data sample are as follows:

[0059] According to the methanol injection volume big data sample, the BP artificial neural network is used to perform training, verification and prediction according to different parameter data, and a methanol theoretical injection volume prediction model is obtained through training.

[0060] In a specific implementation scheme, the step of automatically adjusting the amount of methanol injection is specifically as follows:

[0061] The number of alcohol injection pumps is PID-adjusted, and the amount of methanol injection is automatically adjusted.

[0062] Specifically, the general large-caliber anti-icing and anti-blocking method of the regulating valve includes the following steps:

[0063] First, the function of comparing water dew point and outlet temperature is added to the host computer to realize real-time monitoring and early warning of key process parameters;

[0064] Secondly, HYSYS software was used to simulate the process of methanol injection in the transfer branch and construct a large data sample of high-concentration methanol injection volume;

[0065] It should be noted that the concentration of industrial methanol used in Ansha Station is more than 90%, so it is impossible to use the Hammerschmidt and Nielsen semi-empirical formula to calculate the amount of methanol injection. Therefore, by consulting literature and using HYSYS and other software to simulate the process of methanol injection in the transfer branch, a large data sample of high-concentration methanol injection volume was constructed.

[0066] Based on the big data sample of methanol injection volume, the BP artificial neural network was used to conduct systematic training, verification and prediction according to different distribution pressures, temperatures, distribution volumes and natural gas water content, and a methanol theoretical injection volume prediction model was obtained.

[0067] According to the prediction model, the parameters such as the distribution flow, pressure, and temperature are collected through on-site instruments to calculate the optimal alcohol injection amount. The optimal alcohol injection amount is corrected in real time according to the different distribution pressures, temperatures, and distribution volumes on site. The PID adjustment is implemented for the number of alcohol injection pumps to achieve automatic adjustment of the alcohol injection amount, ensuring that there is no ice blockage in the distribution and transfer, while achieving energy conservation and consumption reduction, improving quality and increasing efficiency in the alcohol injection process.

[0068] In a specific implementation scheme, it specifically includes:

[0069] 1. Establish a water dew point early warning system

[0070] According to 3.1.2 of GB50251-2015 Gas Pipeline Engineering Design Code, the water dew point should be 5°C lower than the lowest ambient temperature under transportation conditions. The pressure regulating skid is the main throttling facility in the station, and the rear end temperature is the lowest temperature in the entire station due to the pressure drop effect.

[0071] refer to Figure 8 and Fig. 9 , the host computer of Ansha sub-transmission pigging station adds the function of comparing water dew point with outlet temperature. In order to avoid ice blockage, considering the safety margin, the progress temperature is selected as the water dew point comparison temperature, and the host computer adds a manual adjustment value of ice blockage warning temperature difference to facilitate correction and adjustment.

[0072] 2. Establishing the alcohol injection model

[0073] There has been no theoretical support for the calculation of the amount of methanol injection. Ansha Station only manually adjusted it based on on-site experience, resulting in a certain degree of waste of methanol consumables. It is necessary to optimize the amount of methanol injection to achieve energy saving and consumption reduction while preventing ice blockage events.

[0074] refer to Figure 2 , the voltage regulating skid model of the Ansha Substation transfer branch was established through the hysys software, and based on the field data on January 23, the simulation concluded that the simulated alcohol injection amount was less than the actual alcohol injection amount, proving that there may be room for optimization of the actual alcohol injection amount. Based on this, the subsequent calculations were carried out.

[0075] refer to Figures 3 to 5 ,By recording the key parameters such as inlet and outlet pressure, temperature, water dew point, instantaneous flow rate, and methanol injection amount during the transfer period, 31 groups of valid data were collected as the training group (see Table 1), and the MATLAB BP artificial neural network module was used to establish a theoretical methanol injection amount prediction model for the transfer pipeline.

[0076] The prediction model obtained through training is used to predict the amount of alcohol injection required for the transfer and distribution of Ansha Station in the cleaning operation of Changsha Unicom Project (see Table 2). It can be seen that the required amount of alcohol injection is very small.

[0077]

[0078]

[0079] Table 1 Training data set

[0080] Based on this, during the actual distribution period, no alcohol injection was carried out, and the distribution was only controlled by adjusting the valve opening, and no ice blockage occurred.

[0081]

[0082] Table 2 Prediction results

[0083] refer to Figure 7 The embodiment of the present application provides a general large-caliber anti-icing and anti-blocking device for an anti-regulating valve, including: a control system, a regulating system, a metering system and an alcohol injection pipeline, wherein:

[0084] The control system is used to calculate the methanol injection amount and control the methanol injection work;

[0085] The regulating system is used to regulate the amount of methanol injected;

[0086] The metering system is used to measure the amount of methanol injected;

[0087] The alcohol injection pipeline is used to connect to the transfer branch to perform alcohol injection work.

[0088] In a specific implementation scheme, the control system, the regulating system, the metering system and the alcohol injection pipeline are integrated into one.

[0089] In a specific embodiment, it also includes a water dew point monitoring and early warning module, wherein:

[0090] The water dew point monitoring and early warning module is used to perform real-time monitoring and early warning of the water dew point by comparing the water dew point with the exit temperature.

[0091] In the above technical scheme, a big data sample of methanol injection amount is constructed; a methanol theoretical filling amount prediction model is trained based on the big data sample of methanol injection amount; the optimal methanol injection amount is calculated by calculating the field parameter data based on the methanol theoretical filling amount prediction model; the alcohol injection measures are optimized, and the alcohol injection amount is reasonably adjusted to achieve energy saving and consumption reduction while preventing ice blockage incidents.

[0092] Specifically, in order to achieve automatic adjustment of the alcohol injection amount and flow accumulation, electric regulating valves, gear flow meters, and small PLCs were purchased and a control system was established.

[0093] Serial number Product Name Specifications, models, materials unit quantity 1 Siemens module SR20 Item 1 2 Siemens module AM03 Item 3 3 Switching Power Supply 24V20A Item 1 4 Electric regulating valve ZDLP-160C Item 1 5 Gear flow meter GTGF02F1EM2B1P2 Item 1

[0094] Table 3 Main equipment list

[0095] refer to Figure 6 It adopts a skid-mounted box with steering wheels, integrating the PLC system, air switch, turbine flow meter, working regulating valve, and alcohol injection hose into one, making the equipment easy to install and transport.

[0096] Considering the safety of the process area, an explosion-proof distribution box is used to integrate the live system PLC system and circuit breaker to ensure the explosion-proof nature of the equipment.

[0097] In the above technical solution, the Six Sigma method is adopted:

[0098] Step 1: Aiming at the problem of ice blockage prevention of general large-caliber anti-regulating valves, it was analyzed that the key process parameters could not realize early alarm and the amount of alcohol injection could not be accurately controlled, and it was proposed to optimize the anti-icing and alcohol injection equipment:

[0099] Step 2: Communicate with the station operation and maintenance personnel and university research teams, collect relevant scientific research data, and demonstrate the feasibility of the project plan;

[0100] Step 3: Based on the existing software and hardware conditions of the site, propose a technical route for project implementation, and propose an implementation plan based on the technical route;

[0101] Step 4: According to the implementation plan, the empirical formula for alcohol injection is fitted through numerical simulation software and BP artificial neural network. On the basis of not changing the original alcohol injection equipment, a small PLC is used as the control system, an electric regulating valve as the regulating system, and a gear flow meter as the metering system, and skid-mounted integration is used to achieve precise alcohol injection; the upper computer adds the function of comparing the water dew point with the outlet temperature to achieve early warning of process parameters;

[0102] Step 5: Actually run the equipment to test the functions designed by the platform;

[0103] Step 6: Summarize the project design process, analyze the project implementation rules, and lay a solid foundation for subsequent platform function improvements.

[0104] Furthermore, the main beneficial effects are as follows:

[0105] 1. Equipment integration, easy installation and transportation

[0106] The equipment is installed in an integral skid, with four universal wheels installed at the bottom of the skid, which is convenient for transportation. The equipment is connected to the original alcohol injection skid through a high-pressure hose, which is easy to install.

[0107] 2. High safety performance, high pressure resistance and explosion proof

[0108] Considering the safety of the process area, an explosion-proof distribution box is used to integrate the PLC system and the circuit breaker of the live system to ensure the explosion-proof performance of the equipment. In order to ensure the safety of the pressure regulating skid for alcohol injection, the electric regulating valve and the alcohol injection pipeline are both of class 600 pressure level. While saving the amount of alcohol injection, the methanol content in the natural gas is effectively reduced, protecting the safety and health of downstream users.

[0109] 3. Accurate alcohol injection to achieve quantitative metering control

[0110] The equipment uses a small PLC as the control system to calculate the amount of alcohol injected, an electric regulating valve to control the alcohol injection flow, and a gear flow meter to measure the instantaneous amount and cumulative amount to achieve precise alcohol injection.

[0111] 4. Save energy, safe and environmentally friendly

[0112] Compared with the original manual adjustment of the amount of alcohol injected, this equipment realizes water dew point pre-alarm, accurate calculation of the amount of alcohol injected, and no alcohol injection unless necessary, which effectively reduces the methanol content in natural gas and protects the safety and health of downstream users.

[0113] 5. Combine alarm and early warning to prevent accidents

[0114] The host computer adds the function of comparing water dew point with outlet temperature, which effectively improves the monitoring accuracy of process parameters and reduces the risk of omissions in manual monitoring. The prediction model assists the superior dispatcher and branch companies to effectively judge the risk of ice blockage and carry out emergency material reserves in advance.

[0115] The cost of this equipment is about 20,000 yuan. During the winter supply guarantee period, Ansha Station consumed 139 barrels of 25L industrial-grade methanol. According to a rough estimate, after precise calculation, 30% of the methanol injection can be effectively saved. Industrial-grade methanol costs 2,800 yuan / ton. According to market research, the new production transfer station distribution and gas storage gas production need to continuously inject methanol for 24 hours to prevent equipment from ice blockage. Through this device, the cost of alcohol injection can be effectively reduced.

[0116] Those skilled in the art will appreciate that the present application may be implemented as a system, method or computer program product.

[0117] Therefore, the present disclosure may be specifically implemented in the following forms, namely: it may be completely hardware, it may be completely software (including firmware, resident software, microcode, etc.), or it may be a combination of hardware and software, generally referred to herein as a "circuit", "module" or "system". In addition, in some embodiments, the present application may also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium may contain computer-readable program code.

[0118] Any combination of one or more computer-readable media can be used. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0119] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present application. On this basis, a variety of replacements and improvements can be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A general large-caliber anti-icing and anti-blocking method for regulating valves, characterized in that: The following steps are involved: Construct a big data sample of methanol injection volume; According to the methanol injection amount big data sample, a methanol theoretical injection amount prediction model is trained; According to the methanol theoretical injection amount prediction model, the methanol injection amount is calculated by calculating the field parameter data.

2. The method for preventing ice blockage of a universal large-caliber anti-regulating valve according to claim 1 is characterized in that: Also includes: According to the correction field parameter data, the alcohol injection amount is corrected in real time, and the methanol injection amount is automatically adjusted to complete the design of the universal large-diameter anti-regulating valve anti-icing and anti-blocking equipment.

3. The method for preventing ice blockage of a universal large-diameter anti-regulating valve according to claim 2 is characterized in that: Also includes: Real-time monitoring and early alarm of water dew point.

4. The method for preventing ice blockage of a universal large-caliber anti-regulating valve according to claim 3 is characterized in that: The steps for real-time monitoring and early warning of water dew point are as follows: By comparing the water dew point with the outlet temperature, the water dew point can be monitored in real time and early alarm can be given.

5. The method for preventing ice blockage of a universal large-caliber anti-regulating valve according to claim 4 is characterized in that: The steps to construct a big data sample of methanol injection volume are as follows: The process of methanol injection in the transfer branch is simulated to construct a big data sample of methanol injection quantity.

6. The method for preventing ice blockage of a universal large-caliber anti-regulating valve according to claim 5 is characterized in that: The steps of training a methanol theoretical injection amount prediction model according to the methanol injection amount big data sample are specifically as follows: According to the methanol injection amount big data sample, a BP artificial neural network is trained according to different parameter data to obtain a methanol theoretical injection amount prediction model.

7. The method for preventing ice blockage of a universal large-diameter anti-regulating valve according to claim 6 is characterized in that: The steps for automatically adjusting the methanol injection amount are as follows: The number of alcohol injection pumps is adjusted, and the amount of methanol injection is automatically adjusted.

8. A universal large-caliber anti-icing and anti-blocking device for regulating valves, characterized in that: include: Control system, regulation system, metering system and alcohol injection pipeline, among which, The control system is used to calculate the methanol injection amount and control the methanol injection work; The regulating system is used to regulate the amount of methanol injected; The metering system is used to measure the amount of methanol injected; The alcohol injection pipeline is used to connect to the transfer branch to perform alcohol injection work.

9. The universal large-caliber anti-icing and anti-blocking device for regulating valves according to claim 8, characterized in that: The control system, the regulating system, the metering system and the alcohol injection pipeline are integrated into one.

10. The universal large-caliber anti-icing and anti-blocking device for regulating valves according to claim 9, characterized in that: It also includes a water dew point monitoring and early warning module, in which: The water dew point monitoring and early warning module is used to perform real-time monitoring and early warning of the water dew point by comparing the water dew point with the exit temperature.

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