Method for cooperating with multiple types of fans and circulating pumps based on desulfurization and oxidation control

Abstract

The invention relates to the field of desulfurization equipment, in particular to a method for cooperating with multiple types of fans and circulating pumps based on desulfurization and oxidation control. The invention essentially provides a scientific fan and circulating pump configuration method, the oxidation level of the slurry is monitored in real time by detecting the oxidation condition in the desulfurization tower, parameters are taken as reference values, advantages and disadvantages of different types of fans and different powers of different layers of circulating pumps are combined, and the fan and the pump are controlled, so that the efficiency of the desulfurization tower is improved. The configuration scheme of the model and number of the fans and the circulating pumps most suitable for the oxidation method is obtained, the energy utilization efficiency of the method is improved, the operation cost is reduced, meanwhile, safety and stability are improved, and combination and operation of the fans and the circulating pumps are optimized.

Description

[0001] Methodology Area

[0002] The present invention relates to the field of desulfurization equipment, and in particular to a method for coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control.

[0003] Background Methods

[0004] Oxidation concentration and sub-tower monitoring is a technology used in the desulfurization process, mainly used to improve desulfurization efficiency, ensure operation safety, prevent environmental accidents and save fan energy consumption. The core of this technology lies in the centralized control of the desulfurization oxidation wind method and sub-tower adjustment, which realizes real-time monitoring of the oxidation stage, centralized control of oxidation air volume and automatic adjustment of sub-towers. Through the analysis of the existing oxidation wind method in the desulfurization tower, the oxidation situation of the method, the operating status of the fan, pressure data and the start and stop rules of the circulating pump are collected. At the same time, real-time data such as unit load, flue gas SO2 content, and coal sulfur content are collected as the basis for subsequent fan and pump control. According to the required air volume and boost requirements, select the appropriate type of magnetic suspension fan. According to the method stability requirements, select an appropriate number of centrifugal fans for configuration to ensure that the method can still operate normally under low load or fluctuating conditions. According to the real-time monitoring of the slurry oxidation level, determine the number of startup layers and units of the circulating pump to avoid unnecessary energy consumption due to excessive opening.

[0005] However, the existing technology often encounters the following problems during use:

[0006] (1) Currently, most power plants use a single type of oxidation fan in the oxidation desulfurization process. Different fans have different advantages and disadvantages, and their applicability to the units is also different. Although the existing desulfurization oxidation wind method can control the fan input air volume, it is also unable to achieve ideal control effects due to differences in fan adjustability, pressure requirements, fan speed and other issues. If the oxidation method is combined with multiple types of fans, it will produce a 1+1>2 effect. However, there is currently a lack of a method for how to select the appropriate model or number of fans for different oxidation methods in this field.

[0007] (2) The startup of the power plant's circulating pump is based on the unit load or the SO2 content of the inlet flue gas. However, under the current situation, the sulfur content of the unit's coal does not meet the design value and the load fluctuates greatly. Therefore, the circulating pump is started irregularly and is basically fully open. If it needs to be adjusted, it is basically done manually by checking the situation in the absorption tower to see if there are bubbles and then changing the operation mode of the circulating pump. Summary of the invention

[0008] The main purpose of the present invention is to provide a method for coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control, so as to effectively solve the problem mentioned in the background method that there is currently a lack of a method for selecting suitable models or quantities of fans for different oxidation methods in this field.

[0009] To achieve the above object, the method scheme adopted by the present invention is:

[0010] A method for coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control, comprising:

[0011] S1, preliminary investigation and data collection;

[0012] S11. Analyze the existing oxidation air method in the desulfurization tower, collect the oxidation situation of the method, the operating status of the fan, the pressure data and the start and stop rules of the circulation pump;

[0013] S12, collect real-time data such as unit load, flue gas SO2 content, coal sulfur content, etc., as the basis for subsequent fan and pump control;

[0014] S2. Determine the required oxidation air volume according to the desulfurization tower load, flue gas flow, pressure head and SO2 content;

[0015] S3. Configure and select the fan according to the surveyed and collected data, and adjust the operation mode of the circulation pump according to the data of the slurry oxidation analyzer;

[0016] S4, monitor the pressure and air volume in the desulfurization tower in real time, and adjust the operation status of the fan through the wind pressure detection device;

[0017] S5. Real-time monitoring of oxidation air volume, fan pressure, circulating pump working status and other data to ensure coordinated operation of various methods;

[0018] S6. Debug and optimize;

[0019] S7. Conduct method training and write operation manuals.

[0020] The step S3 further includes:

[0021] S31. Selection of magnetic levitation fan: Select the appropriate type of magnetic levitation fan according to the required air volume and boost requirements;

[0022] S32. Selection of centrifugal fans: According to the method stability requirements, select an appropriate number of centrifugal fans for configuration to ensure that the method can still operate normally under low load or fluctuation conditions;

[0023] S33. Selection of circulation pump configuration: Based on the real-time monitoring of the slurry oxidation level, determine the starting layers and number of circulation pumps to avoid unnecessary energy consumption due to excessive startup.

[0024] The step S4 further includes:

[0025] S41. Adjust the magnetic suspension fan and appropriately reduce the fan air volume when the boost requirement is met; for the centrifugal fan, ensure that the air volume and pressure output are stable;

[0026] S42. When the method demand fluctuates, the fan configuration is adjusted according to the real-time data. For example, multiple magnetic suspension fans cooperate with the centrifugal fans;

[0027] S43. According to the data from the slurry oxidation analyzer, dynamically adjust the operating layers of the circulation pump, set the detection cycle, detect once every 30 minutes, the detection time is 30 seconds, collect data in real time and adjust the working status of the pump.

[0028] The step S5 further includes:

[0029] Feedback adjustment: When an abnormality occurs in the method, automatic adjustments are made through the feedback mechanism to ensure the stability and safety of the desulfurization method.

[0030] The step S6 further includes:

[0031] S61, Debugging stage: After the preliminary method is built, debugging is carried out to ensure the control accuracy of the fan and circulation pump, optimize the air volume distribution, and ensure efficient coordination of each link;

[0032] S62. Performance optimization: Through long-term operation data analysis, further optimize the configuration, operation mode and response mechanism of the fan and circulation pump to ensure that the method achieves optimal performance.

[0033] The step S7 further includes:

[0034] S71. Provide training to operators on method operation and maintenance to ensure that they are familiar with the method operation principles, various operation procedures and troubleshooting methods;

[0035] S72. Prepare detailed operation and maintenance manuals to ensure long-term stable operation of the method.

[0036] Compared with the existing methods, the beneficial effects of the present invention are as follows: the present invention essentially provides a scientific fan configuration method, which monitors the oxidation level of the slurry in real time by detecting the oxidation situation in the desulfurization tower, and adjusts the parameters such as the oxidation air volume and fan pressure. Based on the parameters as reference values, combined with the advantages and disadvantages of different types of fans, the fan and pump control is used to obtain the fan model and quantity configuration scheme that is most suitable for the oxidation method, thereby improving the energy utilization efficiency of the method, reducing the operating cost, and at the same time improving the safety and stability, and optimizing the combination and operation of the fan. For example, the magnetic levitation fan is suitable for rapid adjustment of the air volume, and the single centrifugal fan provides stable pressure.

[0037] (2) By directly referring to the data from the slurry oxidation analyzer, the number of layers and units of the circulation pumps can be adjusted as needed to avoid irregular startup that leads to energy waste or inefficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the specific embodiments of the present invention, but do not constitute a limitation of the present invention.

[0039] Figure 1 It is a schematic diagram of the overall steps of the present invention.

[0040] Figure 2 This is a schematic diagram of step S4 of the present invention.

[0041] Figure 3 This is a schematic diagram of step S6 of the present invention.

[0042] Figure 4 This is a schematic diagram of step S7 of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the method scheme in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary method personnel in this field without making creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary method personnel in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] like Figure 1-4 As shown, a method for coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control includes:

[0046] S1, preliminary investigation and data collection;

[0047] S11. Analyze the existing oxidation air method in the desulfurization tower, collect the oxidation situation of the method, the operating status of the fan, the pressure data and the start and stop rules of the circulation pump;

[0048] The purpose is to fully understand the working status of the existing oxidation wind method in the desulfurization tower. The oxidation situation reflects the oxidation effect of the method on sulfur. The fan operation status includes information such as the fan speed and whether it is operating normally. The pressure data helps to judge the dynamic condition of the airflow in the method, and the start and stop rules of the circulation pump are very important for mastering the slurry circulation and the continuity of the entire desulfurization process. These data are the basis for subsequent optimization of method configuration and control.

[0049] S12, collect real-time data such as unit load, flue gas SO2 content, coal sulfur content, etc., as the basis for subsequent fan and pump control;

[0050] The unit load affects the work intensity requirements of the desulfurization method. The SO2 content in the flue gas directly determines the amount of sulfide that needs to be oxidized and removed. The sulfur content of the coal type affects the total amount of sulfur entering the desulfurization tower from the source. The collection of these real-time data allows the method to accurately adjust the operation of the fan and pump according to the actual situation to achieve the purpose of efficient desulfurization.

[0051] S2, determine the required oxidation air volume and pressure head according to the desulfurization tower load, flue gas flow, unit oxidation height and SO2 content;

[0052] The load, flue gas flow and SO2 content of the desulfurization tower are key factors affecting the desulfurization effect. When the load is large, the flue gas flow is high or the SO2 content is high, more oxidation air volume is required to ensure sufficient oxygen to participate in the reaction and oxidize the sulfide into sulfate for removal. The pressure head determines the ability of the oxidation air to effectively reach all parts of the desulfurization tower, ensuring that the oxidation reaction is carried out evenly throughout the desulfurization tower.

[0053] S3, configure and select the fan according to the survey and collected data, and adjust the circulation pump operation mode according to the slurry oxidation analyzer data;

[0054] S31. Selection of magnetic levitation fan: Select the appropriate type of magnetic levitation fan according to the required air volume and boost requirements; magnetic levitation fans have some unique advantages, such as high efficiency, low noise, and low maintenance. Selecting the appropriate type of magnetic levitation fan according to the air volume and boost requirements can ensure that the advantages of magnetic levitation fans are brought into play while meeting the oxidation air volume and pressure head requirements, thereby improving the overall performance of the method.

[0055] S32. Selection of centrifugal fans: According to the method stability requirements, select an appropriate number of centrifugal fans for configuration to ensure that the method can still operate normally under low load or fluctuating conditions; centrifugal fans have good adaptability under different working conditions. When the method is under low load or load fluctuates, relying solely on magnetic suspension fans may not meet the method stability requirements. By selecting an appropriate number of centrifugal fans for configuration, sufficient oxidation air volume and stable pressure output can be guaranteed under various working conditions to maintain the normal operation of the desulfurization method.

[0056] S33. Selection of circulating pump configuration: According to the real-time monitoring of the slurry oxidation level, determine the number of layers and units of the circulating pump to be started to avoid unnecessary energy consumption due to excessive opening. The function of the circulating pump is to circulate the desulfurization slurry in the desulfurization tower to ensure that the slurry and the flue gas are fully in contact for reaction. By real-time monitoring of the slurry oxidation level, the number of layers and units of the circulating pump that need to be started can be accurately determined. If the circulating pump is opened excessively, it will not only cause a waste of energy, but may also have a negative impact on the stability of the method.

[0057] S4, real-time monitoring of the pressure and air volume in the desulfurization tower, and adjustment of the fan operating status through the wind pressure detection device;

[0058] S41. Adjust the magnetic suspension fan. When the pressure requirement is met, appropriately reduce the fan air volume. For centrifugal fans, ensure that the air volume and pressure output are stable. After the magnetic suspension fan reaches the pressure requirement, reducing the air volume can avoid wasting energy and also help maintain the stability of the pressure in the method. Centrifugal fans are mainly used to provide stable air volume and pressure output under various working conditions to ensure the stable desulfurization reaction.

[0059] S42. When the method demand fluctuates, the fan configuration is adjusted according to the real-time data (for example, multiple magnetic levitation fans cooperate with centrifugal fans); when the method demand fluctuates, relying on a single fan may not be able to meet the requirements of oxidation air volume and pressure head. Through the coordination of multiple magnetic levitation fans and centrifugal fans, the combination of fans can be flexibly adjusted according to real-time data to ensure that the method can get enough oxidation air supply under different demands.

[0060] S43. According to the oxidation air volume and the data of the slurry oxidation analyzer, dynamically adjust the number of operating layers of the circulation pump, set the detection cycle (for example, detection once every 30 minutes, the detection time is 30 seconds), collect data in real time and adjust the working state of the pump. The oxidation air volume and the data of the slurry oxidation analyzer reflect the progress of the desulfurization reaction. According to these data, the number of operating layers of the circulation pump is dynamically adjusted to ensure that the circulation effect of the slurry matches the needs of the oxidation reaction. Setting the detection cycle can obtain data regularly so as to adjust the working state of the pump in time and improve the operating efficiency of the method.

[0061] For example, the slurry circulation pump has 5 layers, the higher the number of layers, the greater the power

[0062]

[0063]

[0064] In the above figure, 1 is on and 0 is off.

[0065] Method: The slurry oxidation analyzer data was detected once every 30 minutes. The data detection lasted for 30 seconds and the highest value within 30 seconds was detected.

[0066] S5, real-time monitoring of oxidation air volume, fan pressure, circulation pump working status and other data to ensure coordinated operation of various methods; when abnormalities occur in the method (such as insufficient pressure or insufficient oxidation), automatic adjustments are made through the feedback mechanism to ensure the stability and safety of the desulfurization method.

[0067] For example, if the unit needs to be boosted to 70KP (+-10 fluctuations), the maximum boost of the magnetic levitation fan is 85KP, and the fan is designed to meet the air supply of a single unit under 100% BMCR conditions (the adjustability is only 30%); the single centrifugal fan is designed to meet the air supply of a single unit under 50% BMCR conditions, and six fans are configured, with four fans in use and two in reserve. Take the air supply volume under the condition of 100% BMCR of a single unit and the sulfur content of coal as the design value as an example,

[0068]

[0069]

[0070] Real-time monitoring of these data can fully grasp the operating status of the method. When abnormal conditions such as insufficient pressure or insufficient oxidation occur, the feedback mechanism can automatically adjust the operating parameters of equipment such as fans and circulating pumps according to the problem, such as increasing the fan air volume, adjusting the number of operating layers of the circulating pump, etc., thereby ensuring the stable and safe operation of the desulfurization method.

[0071] S6. Debug and optimize;

[0072] S61. Debugging stage: After the preliminary method is built, debugging is carried out to ensure the control accuracy of the fan and the circulation pump, optimize the air volume and pressure distribution, and ensure the efficient coordination of each link; after the method is built, debugging is an indispensable link. Through debugging, it can be tested whether the control of the fan and the circulation pump is accurate, whether the air volume and pressure distribution is reasonable, and timely discover and solve the problems in the collaborative work between the various links, so as to improve the working efficiency of the entire method.

[0073] S62 Performance Optimization: Through long-term operation data analysis, the configuration, operation mode and response mechanism of the fan and circulating pump are further optimized to ensure the method achieves optimal performance. The long-term operation data contains information about the performance of the method under different working conditions. Analyzing this data can provide a deep understanding of the operating characteristics of the method, and then optimize the configuration, operation mode and response mechanism of the fan and circulating pump to continuously approach the optimal performance state.

[0074] S7. Conduct method training and write operation manuals.

[0075] S71. Provide training on method operation and maintenance for operators to ensure that they are familiar with the operating principle of the method, various operating procedures and troubleshooting methods; it is crucial for operators to correctly operate and maintain the method. Only by being familiar with the operating principle, operating procedures and troubleshooting methods of the method can the normal operation of the method be guaranteed and problems such as failures and inefficiency caused by improper operation can be reduced.

[0076] S72. Write detailed operation manuals and maintenance manuals to ensure long-term stable operation of the method. The operation manual and maintenance manual provide detailed guidance for operators. Even if there is a personnel change, the new operator can quickly master the operation and maintenance points of the method according to the manual, thus ensuring long-term stable operation of the method.

[0077] Although embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control, characterized in that: include: S1, preliminary investigation and data collection; S11. Analyze the existing oxidation air method in the desulfurization tower, collect the oxidation situation of the method, the operating status of the fan, the pressure data and the start and stop rules of the circulation pump; S12, collect real-time data such as unit load, flue gas SO2 content, coal sulfur content, etc., as the basis for subsequent fan and pump control; S2. Determine the required oxidation air volume according to the desulfurization tower load, flue gas flow, pressure head and SO2 content; S3. Configure and select the fan according to the surveyed and collected data, and adjust the operation mode of the circulation pump according to the data of the slurry oxidation analyzer; S4, monitor the pressure and air volume in the desulfurization tower in real time, and adjust the operation status of the fan through the wind pressure detection device; S5. Real-time monitoring of oxidation air volume, fan pressure, circulating pump working status and other data to ensure coordinated operation of various methods; S6. Debug and optimize; S7. Conduct method training and write operation manuals.

2. The method of coordinating multiple types of fans and circulating pumps based on desulfurization and oxidation control according to claim 1 is characterized in that: The step S3 further includes: S31. Selection of magnetic levitation fan: Select the appropriate type of magnetic levitation fan according to the required air volume and boost requirements; S32. Selection of centrifugal fans: According to the method stability requirements, select an appropriate number of centrifugal fans for configuration to ensure that the method can still operate normally under low load or fluctuation conditions; S33. Selection of circulation pump configuration: Based on the real-time monitoring of the slurry oxidation level, determine the starting layers and number of circulation pumps to avoid unnecessary energy consumption due to excessive startup.

3. The method of coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control according to claim 1 is characterized in that: The step S4 further includes: S41. Adjust the magnetic suspension fan and appropriately reduce the fan air volume when the boost requirement is met; for the centrifugal fan, ensure that the air volume and pressure output are stable; S42, when method demand fluctuates, adjust fan configuration based on real-time data; S43. According to the data from the slurry oxidation analyzer, dynamically adjust the operating layers of the circulation pump, set the detection cycle, detect once every 30 minutes, the detection time is 30 seconds, collect data in real time and adjust the working status of the pump.

4. The method of coordinating multiple types of fans and circulating pumps based on desulfurization and oxidation control according to claim 1 is characterized in that: The step S5 further includes: Feedback adjustment: When an abnormality occurs in the method, automatic adjustments are made through the feedback mechanism to ensure the stability and safety of the desulfurization method.

5. The method of coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control according to claim 1 is characterized in that: The step S6 further includes: S61, Debugging stage: After the preliminary method is built, debugging is carried out to ensure the control accuracy of the fan and circulation pump, optimize the air volume distribution, and ensure efficient coordination of each link; S62. Performance optimization: Through long-term operation data analysis, further optimize the configuration, operation mode and response mechanism of the fan and circulation pump to ensure that the method achieves optimal performance.

6. The method of coordinating multiple types of fans and circulating pumps based on desulfurization oxidation control according to claim 1 is characterized in that: The step S7 further includes: S71. Provide training to operators on method operation and maintenance to ensure that they are familiar with the method operation principles, various operation procedures and troubleshooting methods; S72. Prepare detailed operation and maintenance manuals to ensure long-term stable operation of the method.

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