Coke oven desulfurization and denitrification slaked lime automatic feeding control system and method based on concentration multi-section adjustment
By employing a multi-segment adjustment algorithm using components such as an online analyzer, PLC controller, and variable frequency feeder, the problems of lag and poor stability in the hydrated lime feeding rate in the coke oven desulfurization and denitrification system were solved, achieving real-time response and stable control of hydrated lime feeding and reducing hydrated lime consumption.
Patent Information
- Application Number
- CN202511481971.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-16
- Publication Date
- 2026-01-16
AI Technical Summary
In traditional coke oven desulfurization and denitrification systems, the amount of hydrated lime fed depends on manual adjustment, which results in problems such as slow response, low energy efficiency, and poor stability.
The system employs an online analyzer, PLC controller, variable frequency feeder, and human-machine interface terminal. It automatically controls the feeding of quicklime through a multi-segment adjustment algorithm, adjusts the feeding amount in real time using the concentration signal, and combines PID algorithm and interlocking protection module to achieve precise, stable, and energy-saving feeding control.
It achieves real-time response in slaked lime feeding, improves emission stability, reduces slaked lime consumption, and reduces the frequency of manual intervention.
Smart Images
Figure CN121338499A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial waste gas treatment technology, and particularly to a technology based on... Automatic feeding control system and method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment. Background Technology
[0002] In traditional coke oven desulfurization and denitrification systems, the amount of hydrated lime fed depends on manual adjustment. Manually adjusting the inverter frequency based on concentration readings has the following drawbacks: 1. Response lag: Manual adjustments cannot track in real time. Concentration fluctuations.
[0003] 2. Low energy efficiency: Conservative feeding leads to excessive addition, increasing the consumption of quicklime.
[0004] 3. Poor stability: Variations in human operation lead to fluctuations in emission indicators.
[0005] Therefore, a method based on An automatic feeding control method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment. Summary of the Invention
[0006] In response to the aforementioned technical problems, a method based on... An automatic feeding control system and method for slaked lime in coke oven desulfurization and denitrification processes with multi-stage concentration adjustment. This invention mainly utilizes online... The analyzer, PLC controller, variable frequency feeder, and human-machine interface terminal perform systematic analysis of real-time acquired signals and automatically adjust the on-site feeding rate according to the operator's settings to achieve precision, stability, and energy saving.
[0007] The technical means employed in this invention are as follows: A type based on An automatic lime feeding control system for coke oven desulfurization and denitrification with multi-stage concentration adjustment includes: online... The analyzer, PLC controller, variable frequency feeder, and human-machine interface terminal include: The online Analyzer for real-time detection Concentration signal; The PLC controller has a built-in multi-segment adjustment algorithm program for receiving... Concentration signal and output frequency conversion control command; The variable frequency feeder adjusts the feeding rate of quicklime via a frequency converter. Its mechanical structure includes a feed hopper, a screw conveyor shaft, and an anti-blocking device. The human-computer interaction terminal is used to display real-time... Concentration, feeder frequency, and alarm status.
[0008] Furthermore, the PLC controller includes a signal acquisition module, a concentration-frequency matching module, a PID control module, and an interlocking protection module, wherein: The signal acquisition module will be online. Analyzer Analog Input Channel Acquisition Analyzer data; The concentration-frequency matching module is used to call a preset... Correspondence between concentration zones and inverter output frequencies; The PID control module, according to the outlet Concentration feedback dynamically corrects the feeding frequency; The interlocking protection module is used when When the concentration exceeds the preset value or the equipment malfunctions, an audible and visual alarm is triggered and the system switches to safe mode.
[0009] Furthermore, the aforementioned The correspondence between concentration zones and inverter output frequencies specifically includes: when At that time, in the low concentration zone, the frequency converter operates in a constant frequency and low speed state; when At that time, in the medium concentration range, the frequency converter operates in a linear frequency regulation state; when At that time, in the high concentration zone, the frequency converter is in peak frequency output state and starts auxiliary jetting.
[0010] Furthermore, the frequency converter has an automatic adjustment range of 20-35Hz for the feeding frequency.
[0011] The present invention also provides a method based on The automatic feeding control system for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment is based on An automatic feeding control method for slaked lime in coke oven desulfurization and denitrification processes with multi-stage concentration adjustment includes: via online The analyzer collects data on flue gas in real time. The concentration signal is transmitted to the PLC controller via RS485 communication; the PLC uses a preset concentration-frequency curve to determine the initial feeding frequency, and a PID algorithm is applied to the outlet. The feedback value is fine-tuned; the frequency converter drives the feeder according to the PLC instructions to adjust the amount of hydrated lime added; when the detection... An abnormal jump in concentration value, or When this occurs, the interlock protection is activated, triggering a signal indicating abnormal current or material blockage in the feeder.
[0012] Furthermore, the real-time collection of flue gas... The sampling period for the concentration signal is ≤5s.
[0013] Compared with the prior art, the present invention has the following advantages: The present invention provides a basis based on An automatic feeding control system and method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment, through online... The analyzer, PLC controller, variable frequency feeder, and human-machine interface terminal utilize the PLC to call a preset concentration-frequency curve, determine the initial feeding frequency, and superimpose a PID algorithm to adjust the outlet frequency. The feedback value is fine-tuned; the frequency converter drives the feeder according to the PLC instructions to adjust the amount of hydrated lime added; when the detection... An abnormal jump in concentration value, or When this occurs, the interlock protection is activated, triggering a signal indicating abnormal current or material blockage in the feeder. This invention can reduce the consumption of quicklime and improve efficiency. This improves emission stability and reduces the frequency of human intervention.
[0014] Based on the above reasons, this invention can be widely promoted in fields such as industrial waste gas treatment. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 Based on the present invention Schematic diagram of an automatic lime feeding control system for coke oven desulfurization and denitrification with multi-stage concentration adjustment.
[0017] Figure 2 Based on the embodiments of the present invention Structure diagram of an automatic lime feeding control system for coke oven desulfurization and denitrification with multi-stage concentration adjustment.
[0018] Figure 3 As described in the embodiments of the present invention A schematic diagram showing the correspondence between concentration zones and inverter output frequencies.
[0019] Figure 4 Based on the embodiments of the present invention A schematic diagram of the automatic feeding control method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment.
[0020] Figure 5 Based on the embodiments of the present invention A schematic diagram of the automatic feeding control method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment. Detailed Implementation
[0021] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0025] like Figure 1 As shown, the present invention provides a method based on An automatic lime feeding control system for coke oven desulfurization and denitrification with multi-stage concentration adjustment includes: online... Analyzer, PLC controller, variable frequency feeder, and human-machine interface terminal, including: online Analyzer for real-time detection Concentration signal; PLC controller with built-in multi-segment adjustment algorithm program for receiving The system outputs a concentration signal and frequency conversion control command; a frequency converter feeder adjusts the feeding rate of hydrated lime via a frequency converter; the mechanical structure includes a feed hopper, a screw conveyor shaft, and an anti-blocking device; and a human-machine interface terminal for displaying real-time data. Concentration, feeder frequency, and alarm status.
[0026] In a specific implementation, as a preferred embodiment of the present invention, the PLC controller includes a signal acquisition module, a concentration-frequency matching module, a PID control module, and an interlocking protection module, wherein: the signal acquisition module will connect online... Analyzer Analog Input Channel Acquisition Analyzer data; concentration-frequency matching module, used to call preset... Correspondence between concentration zones and inverter output frequency; PID control module, based on outlet... Concentration feedback dynamically corrects the feed frequency; interlock protection module, used when... When the concentration exceeds the preset value or the equipment malfunctions, an audible and visual alarm is triggered and the system switches to safe mode.
[0027] In specific implementation, as a preferred embodiment of the present invention, the... The correspondence between concentration zones and inverter output frequencies specifically includes: when At that time, in the low concentration zone, the frequency converter operates in a constant frequency, low speed state; when At that time, in the medium concentration range, the frequency converter operates in a linear frequency regulation state; when At that time, in the high concentration zone, the frequency converter is in peak frequency output state and starts auxiliary jetting.
[0028] In a specific implementation, as a preferred embodiment of the present invention, the frequency converter automatically adjusts the feeding frequency within a range of 20-35Hz.
[0029] The present invention also provides a method based on The automatic feeding control system for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment is based on An automatic feeding control method for slaked lime in coke oven desulfurization and denitrification with multi-stage concentration adjustment includes: online... The analyzer collects data on flue gas in real time. The concentration signal is transmitted to the PLC controller via RS485 communication; the PLC uses a preset concentration-frequency curve to determine the initial feeding frequency, and a PID algorithm is applied to the outlet. The feedback value is fine-tuned; the frequency converter drives the feeder according to the PLC instructions to adjust the amount of hydrated lime added; when the detection... An abnormal jump in concentration value, or When this occurs, the interlock protection is activated, triggering a signal indicating abnormal current or material blockage in the feeder.
[0030] In a specific implementation, as a preferred embodiment of the present invention, the real-time collection of flue gas... The sampling period for the concentration signal is ≤5s.
[0031] Example like Figure 1 As shown, the present invention provides a method based on This embodiment describes an automatic feeding control system for slaked lime used in coke oven desulfurization and denitrification, with multi-stage concentration adjustment. The system is applied in practical production and daily life. The feeder automatically sets the feeding parameters, monitors the material level in the desulfurization sodium bicarbonate silo via radar level gauges, and utilizes silo wall vibrators to ensure a complete desulfurization reaction. Figure 2 As shown, the frequency converter drives the feeder according to PLC instructions to adjust the amount of hydrated lime added, utilizing... Adjust the inverter's operating frequency according to the correspondence between concentration zones and inverter output frequency.
[0032] like Figure 3 and Figure 4 As shown, this invention is supported by an algorithm program, which can reduce the consumption of quicklime and improve efficiency. To improve emission stability and reduce the frequency of human intervention.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A method of determining a location of a mobile device based on The coke oven desulfurization and denitrification lime automatic feeding control system based on concentration multi-section regulation is characterized in that, The utility model relates to a kind of variable frequency feeder for slaked lime, including: Online analyzer, a PLC controller, a frequency conversion feeder and a human-computer interaction terminal, wherein: The online analyzer for real-time detection concentration signal; The PLC controller is internally provided with a multi-section regulation algorithm program for receiving a concentration signal and outputting a variable frequency control instruction; The variable frequency feeder adjusts the feeding rate of slaked lime by frequency converter, and the mechanical structure includes feed hopper, screw conveying shaft and anti-blocking device; The human-computer interaction terminal is used for displaying real-time Concentration, feeder frequency and alarm status.
2. The method of claim 1, wherein the method is based on The coke oven desulfurization and denitrification lime automatic feeding control system with concentration multi-stage regulation is characterized in that, The PLC controller includes a signal acquisition module, a concentration-frequency matching module, a PID adjustment module, and an interlock protection module, wherein: The signal collection module will be online The analyzer analog input channel acquires The analyzer data; The concentration-frequency matching module is configured to call a preset The concentration partition corresponds to the output frequency of the frequency converter. The PID adjusting module adjusts the outlet temperature according to the outlet temperature and the outlet temperature set value The concentration feedback dynamically corrects the feeding frequency The interlocking protection module is configured to Trigger an audible alarm and switch to a safe mode when the concentration exceeds a preset value or the device fails.
3. The method of claim 1 based on The coke oven desulfurization and denitrification lime automatic feeding control system with concentration multi-stage regulation is characterized in that, The The concentration partition and the corresponding relationship of the frequency converter output frequency, specifically comprising: When the frequency converter is in a low concentration zone, the frequency converter is in a constant frequency low speed operation state; When the inverter is in the linear frequency modulation operation state in the medium concentration region, When the high concentration zone, the frequency converter is in the peak frequency output state and the auxiliary injection is started.
4. The method of claim 1 based on The coke oven desulfurization and denitrification lime automatic feeding control system with concentration multi-stage regulation is characterized in that, The frequency converter automatically adjusts the feeding frequency in the range of 20-35 Hz.
5. A method according to any one of claims 1 to 4, wherein the method comprises the step of: - determining the concentration of the target analyte in the sample. The coke oven desulfurization and denitrification lime automatic feeding control system based on concentration multi-section regulation realizes the coke oven desulfurization and denitrification lime automatic feeding control method based on concentration multi-section regulation. The coke oven desulfurization and denitrification lime automatic feeding control method based on concentration multi-section regulation, characterized in that, The frequency converter drives the feeder according to the PLC instructions to adjust the dosage of slaked lime. via online The analyzer collects data on flue gas in real time. The concentration signal is transmitted to the PLC controller via RS485 communication. The preset concentration-frequency curve is called by PLC to determine the initial feeding frequency, and the PID algorithm is superimposed on the outlet feedback value for fine tuning; When the detection The concentration appears abnormal jump value, or The interlock protection is started, and the feeding machine current abnormal or blockage signal is triggered.
6. The method of claim 5, wherein the method is based on The method for automatically feeding lime for coke desulfurization and denitrification with concentration multi-stage regulation is characterized in that, The real-time collection of flue gas in The sampling period of the concentration signal is ≤5s.