Desulfurization oxidation air system abnormity early warning method and system

Abstract

The invention discloses a desulfurization oxidation air system abnormity early warning method and system, and relates to the technical field of oxidation air detection.The method comprises the steps that an oxidation air blower sends oxidation air into an absorption tower, and gas data of the oxidation air blower and slurry data in the absorption tower are collected in real time; calculating the gas flow of the oxidation fan and the pressure of an outlet header pipe according to the collected gas data and slurry data; and judging whether the oxidation machine breaks down based on the slurry data, the gas flow and the outlet header pipe pressure. Relevant parameters of the oxidation fan are collected in real time, whether the oxidation fan breaks down or not is comprehensively judged by combining the slurry liquid level height and the slurry density in the absorption tower, fault judgment is more accurate, and early warning is more real-time.

Description

Technical Field

[0001] The present invention relates to the technical field of oxidation air detection, and in particular to an abnormality early warning method and system for a desulfurization oxidation air system. Background Art

[0002] In wet flue gas desulfurization (FGD) at thermal power plants, the oxidizing air system oxidizes sulfites into sulfates, playing a crucial role. In actual operation, the oxidizing air enters the absorber in a slurry pool. Because the pipe network distributes the oxidizing air to the absorber through fine pores, small pores and branch pipes are prone to clogging during operation. Minor blockages are difficult to detect, and by the time a severe blockage is discovered, it's already impossible to address and must be treated after the unit is shut down.

[0003] Currently, there is no early warning system in operation, relying entirely on monitoring the oxidation fan and the oxidation air system outlet pressure. Excessive pressure can cause fan surge. Operators can only detect abnormally high or low oxidation air system outlet pressures, and are unable to identify the specific influencing factors for minor anomalies.

[0004] The present invention proposes an early warning diagnosis method, which reminds the operating personnel to deal with it in time when a slight blockage occurs, so as to avoid large-scale failure of the oxidation air system. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the problem to be solved by the present invention is that there is no relevant early warning system in operation, and the system relies entirely on monitoring the oxidation fan and the oxidation air system outlet pressure. When a slight abnormality occurs, the operator cannot determine the specific influencing factors.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a desulfurization oxidation air system abnormality warning method, which includes: an oxidation fan sends oxidation air into an absorption tower, and collects gas data of the oxidation fan and slurry data in the absorption tower in real time; calculates the gas flow rate and outlet main pipe pressure of the oxidation fan based on the collected gas data and slurry data; and judges whether the oxidizer has a fault based on the slurry data, gas flow rate and outlet main pipe pressure.

[0008] As a preferred solution of the abnormal warning method for a desulfurization oxidation air system described in the present invention, the real-time collection of gas data of the oxidation blower includes using a pressure sensor to collect the gas pressure at the inlet and outlet of the oxidation blower; and using a temperature sensor to collect the gas temperature data at the inlet and outlet of the oxidation blower.

[0009] As a preferred solution of the abnormal warning method for a desulfurization oxidation air system described in the present invention, the slurry data includes slurry density and slurry liquid level height.

[0010] As a preferred solution of the abnormal warning method of the desulfurization oxidation air system of the present invention, the calculation formula of the gas flow of the oxidation blower is expressed as follows:

[0011]

[0012] Among them, Q represents the gas flow of the oxidation fan, k represents the adjustment parameter, P represents the differential pressure value, P1 represents the inlet pressure of the oxidation fan, P 排 Expressed as the oxidation fan outlet pressure, T 进 Expressed as the oxidation fan inlet temperature, T 排 Expressed as the oxidation fan exhaust temperature.

[0013] As a preferred solution of the abnormal warning method of the desulfurization oxidation air system of the present invention, the calculation formula of the outlet main pipe pressure is expressed as follows:

[0014] P 总 =K1P 排 +K2H+k3ρ+Kp

[0015] Among them, P 总 Expressed as outlet main pressure, K1 is expressed as P 排 K2 is the influencing factor of the slurry level height, H is the slurry level height, k3 is the influencing factor of the slurry density, ρ is the slurry density, and Kp is the abnormal influencing factor of the oxidizing wind.

[0016] As a preferred solution of the abnormal warning method for a desulfurization oxidation air system described in the present invention, the method for obtaining k1, k2, and k3 includes: when the oxidation blower is operating normally, while the slurry liquid level and slurry density remain unchanged, increasing the flow rate to obtain the K1 parameter; when the oxidation blower is operating normally, while other parameters remain unchanged, increasing H to obtain the K2 parameter; when the oxidation blower is operating normally, while other parameters remain unchanged, increasing ρ to obtain the k3 parameter.

[0017] As a preferred solution of the abnormal warning method for a desulfurization oxidation air system described in the present invention, the method of judging whether the oxidizer has a fault includes detecting whether the gas flow, slurry liquid level and slurry density of the oxidation fan have changed when the outlet main pipe pressure changes. If none of them have changed, it is judged that the oxidizer has a fault. If all of them have changed or any one parameter has changed, it is judged whether the change range of the outlet main pipe pressure meets the preset change threshold. If so, the system is operating normally. If not, it is judged that the oxidizer has a fault.

[0018] Another object of the present invention is to provide a desulfurization oxidation air system abnormality warning system, which can collect relevant parameters of the oxidation blower in real time and determine whether a fault occurs.

[0019] In order to solve the above technical problems, the present invention provides the following technical solutions: a system for abnormal warning method of desulfurization oxidation air system, comprising: a data acquisition module, a mathematical calculation module and a fault judgment module;

[0020] The data acquisition module collects gas data of the oxidation blower and slurry data in the absorption tower in real time; the mathematical calculation module calculates the gas flow rate and outlet main pipe pressure of the oxidation blower based on the collected gas data and slurry data; the fault judgment module judges whether the oxidizer has a fault based on the slurry data, gas flow rate and outlet main pipe pressure.

[0021] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the above-mentioned desulfurization oxidation air system abnormality early warning method are implemented.

[0022] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned desulfurization oxidation air system abnormality warning method.

[0023] The beneficial effects of the present invention are as follows: there is no relevant early warning system in operation now, and it relies entirely on monitoring the oxidation fan and the oxidation air system outlet pressure. When a slight abnormality occurs, the operator cannot determine the specific influencing factors. The present invention collects the relevant parameters of the oxidation fan in real time, and combines the slurry liquid level height and slurry density in the absorption tower to comprehensively judge whether the oxidation fan has a fault, making the fault judgment more accurate and the warning more real-time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0025] Figure 1 This is a general flow chart of an abnormal warning method for a desulfurization oxidation air system in Example 1.

[0026] Figure 2 This is a flow chart of the judgment of an abnormal warning method for a desulfurization oxidation air system in Example 1.

[0027] Figure 3 This is a module structure diagram of an abnormal warning system for a desulfurization oxidation air system in Example 2. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Example 1, with reference to Figure 1 and Figure 2 , which is the first embodiment of the present invention, provides a desulfurization oxidation air system abnormality warning method including: Figure 1 As shown:

[0031] S1. The oxidation blower sends oxidation air into the absorption tower, and the gas data of the oxidation blower and the slurry data in the absorption tower are collected in real time.

[0032] The gas pressure at the inlet and outlet of the oxidation blower is collected using a pressure sensor, and the gas temperature data at the inlet and outlet of the oxidation blower is collected using a temperature sensor.

[0033] The slurry data includes the slurry density and slurry level height in the absorption tower.

[0034] S2. Calculate the gas flow rate and outlet main pipe pressure of the oxidation blower based on the collected gas data and slurry data.

[0035] The calculation formula of the gas flow of the oxidation blower is expressed as follows:

[0036]

[0037] Among them, Q represents the gas flow of the oxidation fan, k represents the adjustment parameter, P represents the differential pressure value, P1 represents the inlet pressure of the oxidation fan, P 排 Expressed as the oxidation fan outlet pressure, T 进 Expressed as the oxidation fan inlet temperature, T 排 Expressed as the oxidation fan exhaust temperature.

[0038] During the operation of the oxidation blower, according to the flow measurement principle, P 排 There is a certain relationship with Q.

[0039] Therefore, the calculation formula of the outlet main pipe pressure is expressed as:

[0040] P 总 =K1P 排+K2H+k3ρ+Kp

[0041] Among them, P 总 Expressed as outlet main pressure, K1 is expressed as P 排 K2 is the influencing factor of the slurry level height, H is the slurry level height, k3 is the influencing factor of the slurry density, ρ is the slurry density, and Kp is the abnormal influencing factor of the oxidizing wind.

[0042] The specific method for obtaining k1, k2, and k3 includes: when the oxidation blower operates normally, while the slurry level height and slurry density remain unchanged, increasing the flow rate to obtain the K1 parameter.

[0043] When the oxidation blower is operating normally and other parameters remain unchanged, increase H to obtain the K2 parameter.

[0044] When the oxidation blower operates normally and other parameters remain unchanged, increase ρ to obtain the k3 parameter.

[0045] S3. Determine whether the oxidizer is faulty based on the slurry data, gas flow rate, and outlet main pressure.

[0046] The specific process is as follows Figure 2 As shown, when the outlet main pipe pressure changes, the gas flow rate, slurry level height and slurry density of the oxidation fan are detected to see if they change. If none of them change, it is determined that the oxidizer has a fault. If all of them change or any one of the parameters changes, it is determined whether the change range of the outlet main pipe pressure meets the preset change threshold. If so, the system is operating normally. If not, it is determined that the oxidizer has a fault.

[0047] Among them, in this embodiment, the method for setting the change threshold can be to monitor the operating parameters of the oxidation wind system, such as the oxidation fan flow rate, the oxidation fan outlet pressure, the slurry density, the slurry liquid level, and the abnormal influencing factor parameters of the oxidation wind, and examine the changing relationship between the oxidation wind outlet main pipe pressure and the oxidation fan flow rate, the oxidation fan outlet pressure, the slurry density, the slurry liquid level, and the abnormal influencing factor operating parameters of the oxidation wind, and then use SPSS software to perform multiple regression analysis, establish a multiple regression model reflecting the relationship between them, and propose a method for judging the normal model and abnormal parameters.

[0048] Example 2, reference Figure 3, which is the second embodiment of the present invention, and is different from the first embodiment in that: a system for an abnormal warning method for a desulfurization oxidation air system includes a data acquisition module 100, a mathematical calculation module 200 and a fault judgment module 300; the data acquisition module 100 collects gas data of the oxidation fan and slurry data in the absorption tower in real time; the mathematical calculation module 200 calculates the gas flow rate and outlet main pipe pressure of the oxidation fan based on the collected gas data and slurry data; the fault judgment module 300 judges whether the oxidizer has a fault based on the slurry data, gas flow rate and outlet main pipe pressure.

[0049] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0050] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0051] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0052] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A desulfurization oxidation air system abnormality early warning method, characterized by: include, The oxidation blower sends oxidation air into the absorption tower, and the gas data of the oxidation blower and the slurry data in the absorption tower are collected in real time; Calculate the gas flow rate and outlet main pipe pressure of the oxidation blower based on the collected gas data and slurry data; Determine whether the oxidizer is faulty based on slurry data, gas flow rate and outlet main pressure.

2. The abnormality warning method for a desulfurization oxidation air system according to claim 1, characterized in that: The real-time collection of gas data of the oxidation blower includes collecting the gas pressure at the inlet and outlet of the oxidation blower using a pressure sensor; Temperature sensors are used to collect gas temperature data at the inlet and outlet of the oxidation blower.

3. The abnormality warning method for a desulfurization oxidation air system according to claim 2, characterized in that: The slurry data includes slurry density and slurry level height.

4. The abnormality warning method for a desulfurization oxidation air system according to claim 3, characterized in that: The calculation formula of the gas flow of the oxidation blower is expressed as follows: Among them, Q represents the gas flow of the oxidation fan, k represents the adjustment parameter, P represents the differential pressure value, P1 represents the inlet pressure of the oxidation fan, P 排 Expressed as the oxidation fan outlet pressure, T 进 Expressed as the oxidation fan inlet temperature, T 排 Expressed as the oxidation fan exhaust temperature.

5. The abnormality warning method for a desulfurization oxidation air system according to claim 4, characterized in that: The calculation formula of the outlet main pipe pressure is expressed as, P 总 =K1P 排 +K2H+k3ρ+Kp Among them, P 总 Expressed as outlet main pressure, K1 is expressed as P 排 K2 is the influencing factor of the slurry level height, H is the slurry level height, k3 is the influencing factor of the slurry density, ρ is the slurry density, and Kp is the abnormal influencing factor of the oxidizing wind.

6. The abnormality warning method for a desulfurization oxidation air system according to claim 5, characterized in that: The acquisition methods of k1, K2, and k3 include: When the oxidation blower is operating normally, with the slurry level and density unchanged, increase the flow rate and obtain the K1 parameter; When the oxidation fan is operating normally and other parameters remain unchanged, increase H to obtain the K2 parameter; When the oxidation blower operates normally and other parameters remain unchanged, increase ρ to obtain the k3 parameter.

7. The abnormality warning method for a desulfurization oxidation air system according to claim 6, characterized in that: The method for determining whether the oxidizer has a fault includes detecting whether the gas flow rate, slurry liquid level and slurry density of the oxidation fan have changed when the outlet main pipe pressure changes. If none of them have changed, the oxidizer is determined to have a fault. If all of them have changed or any one of the parameters has changed, whether the range of change of the outlet main pipe pressure meets a preset change threshold is determined. If so, the system is operating normally. If not, the oxidizer is determined to have a fault.

8. A system using the abnormality early warning method for a desulfurization oxidation air system according to any one of claims 1 to 7, characterized in that: It includes a data acquisition module (100), a mathematical calculation module (200) and a fault judgment module (300); The data acquisition module (100) collects gas data from the oxidation blower and slurry data in the absorption tower in real time; The mathematical calculation module (200) calculates the gas flow rate and outlet main pipe pressure of the oxidation blower based on the collected gas data and slurry data; The fault judgment module (300) judges whether the oxidizer has a fault based on slurry data, gas flow rate and outlet main pipe pressure.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the abnormal warning method for a desulfurization oxidation air system according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the abnormal warning method for a desulfurization oxidation air system according to any one of claims 1 to 7 are implemented.

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