Intelligent denitration system for flue gas treatment

Abstract

The utility model discloses an intelligent denitration system for flue gas treatment, which belongs to the technical field of denitration systems, and comprises an ammonia water spot spraying system, a nitric oxide real-time detection system, a precise ammonia spraying control system and a denitration module, the nitric oxide real-time detection system is used for detecting the numerical value of nitric oxide at the outlet of each catalyst module in a denitration tower; the nitrogen oxide real-time detection system calculates and corrects the ammonia water supply amount in real time through a PI D algorithm, the ammonia water spot spraying system is used for receiving ammonia water supply amount data and controlling the ammonia supply amount, the denitration module is composed of a denitration tower, and the nitrogen oxide concentration of a single denitration catalyst module is detected in real time; after monitoring data is intelligently calculated by the precise ammonia spraying control system, precise supply of ammonia water is realized, the utilization rate of the ammonia water is improved to the maximum extent, the ammonia escape phenomenon is effectively reduced, and meanwhile, the working intensity of monitoring personnel is remarkably reduced through automatic control of an upper computer PLC (Programmable Logic Controller) system.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of flue gas treatment intelligent denitration system, belong to denitration system technical field. BACKGROUND

[0002] With the acceleration of global industrialization, the massive use of fossil fuels such as coal and oil has led to serious air pollution problems, among which nitrogen oxides (NOx) are one of the main air pollutants. NOx not only causes environmental problems such as acid rain and photochemical smog, but also has adverse effects on human health. Therefore, how to effectively reduce NOx emissions has become a key research topic in the field of environmental protection. In order to cope with the increasingly severe environmental problems, governments around the world have introduced strict emission standards and laws and regulations, requiring industrial enterprises to take effective measures to reduce NOx emissions during production. For example, China's "Air Pollutant Discharge Standard for Thermal Power Plants" (GB13223-2011) has put forward more stringent requirements for NOx emissions, promoting the rapid development of flue gas denitration technology. With the increasing strictness of environmental regulations and the continuous improvement of air quality requirements, traditional flue gas denitration technology has been difficult to meet the needs of high efficiency, economy and intelligence. The intelligent denitration system integrates advanced sensing technology, big data analysis, artificial intelligence algorithms and automatic control technology to achieve precise control and optimized management of the flue gas denitration process, significantly improving denitration efficiency, reducing operating costs and reducing ammonia escape. SUMMARY

[0003] The purpose of the utility model is to provide a kind of flue gas treatment intelligent denitration system to solve the above problems, through the real-time detection of nitrogen oxides value control of single denitration catalyst module, after monitoring data is calculated by accurate ammonia injection control system, accurate ammonia supply, realize ammonia water utilization maximization, reduce ammonia escape.

[0004] The utility model realizes the above-mentioned purpose through the following technical scheme, a kind of flue gas treatment intelligent denitration system, including ammonia water point injection system, nitrogen oxides real-time detection system, accurate ammonia injection control system and denitration module, the nitrogen oxides real-time detection system is used to detect the nitrogen oxides value of each catalyst module outlet in denitration tower, the nitrogen oxides real-time detection system is calculated by PID algorithm in real time, and the ammonia water supply is corrected, the ammonia water point injection system is used to receive ammonia water supply amount data, control ammonia supply amount, and the denitration module is composed of denitration tower.

[0005] Preferably, the ammonia water point injection system includes an ammonia water pressure stabilizing tank, a point injection electromagnetic valve, a point injection flowmeter and an ammonia water point injection lance.

[0006] Preferably, the ammonia water pressure stabilizing tank is connected to the point injection electromagnetic valve, the ammonia water point injection flowmeter and the ammonia water point injection lance through a pipeline.

[0007] Preferably, the point injection electromagnetic valve is used to receive the point injection signal sent by the precise ammonia injection control system.

[0008] Preferably, the point injection flow meter is used to count the real-time flow of ammonia water.

[0009] Preferably, the ammonia water point injection lance is arranged at the upper part of the denitration module and is connected to the wall of the denitration tower through a flange.

[0010] Preferably, the nitrogen oxide real-time detection system is composed of a flue gas sampling lance and a nitrogen oxide analyzer, the flue gas sampling lance is arranged at the lower part of the denitration module, one side of the flue gas sampling lance is connected to the wall of the denitration tower through a flange, and the other side is connected to the nitrogen oxide analyzer through a metal hose.

[0011] Preferably, the nitrogen oxide analyzer is connected to the precise ammonia injection control system, the real-time data of the measured flue gas nitrogen oxide is transmitted to the upper computer PLC of the precise ammonia injection control system, and the ammonia water point injection signal calculated by the upper computer PLC system is sent to the ammonia water point injection system.

[0012] The utility model discloses a kind of denitration systems, comprising ammonia water point injection system, nitrogen oxide real-time detection system and precise ammonia injection control system. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model.

[0014] Figure 2 It is the signal logic control schematic diagram of the utility model.

[0015] Figure 3 It is the circuit diagram of the data conversion module of the utility model.

[0016] Figure 4 It is the circuit diagram of the data conversion module of the utility model.

[0017] In the drawing: 1, ammonia water point injection system;101, ammonia water pressure stabilizing tank;102, point injection electromagnetic valve;103, point injection flow meter;104, ammonia water point injection lance;2, nitrogen oxide real-time detection system;201, flue gas sampling lance;202, nitrogen oxide analyzer;3, precise ammonia injection control system;4, denitration module. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0019] Please refer to Figure 1 The application discloses a flue gas treatment intelligent denitration system, which comprises an ammonia water point spraying system 1, a nitrogen oxide real-time detection system 2, a precise ammonia spraying control system 3 and a denitration module 4. The nitrogen oxide real-time detection system 2 is used for detecting the nitrogen oxide value at the outlet of each catalyst module in the denitration tower. The nitrogen oxide real-time detection system 2 calculates and corrects the ammonia water supply amount in real time through a PID algorithm. The ammonia water point spraying system 1 is used for receiving the ammonia water supply amount data and controlling the ammonia supply amount. The denitration module 4 is composed of a denitration tower, so that the precise control of the ammonia water supply is facilitated. The denitration module 4 is connected with the ammonia water point spraying gun 104 through a pipeline, so that the point spraying control and the atomized spraying of the denitration ammonia water are realized, and the denitration efficiency is improved.

[0020] The ammonia water point spraying system 1 comprises an ammonia water pressure stabilizing tank 101, a point spraying electromagnetic valve 102, a point spraying flowmeter 103 and an ammonia water point spraying gun 104. The ammonia water pressure stabilizing tank 101 is connected with the point spraying electromagnetic valve 102, the ammonia water point spraying flowmeter 103 and the ammonia water point spraying gun 104 through a pipeline. The ammonia water pressure stabilizing tank 101 is used for stabilizing the pressure of the ammonia water and ensuring the stability of the subsequent ammonia supply. The point spraying electromagnetic valve 102 is used for receiving the point spraying signal sent by the precise ammonia spraying control system 3 and timely opening or closing according to the signal instruction, so as to accurately control the ammonia water supply time. The point spraying flowmeter 103 is used for counting the real-time flow of the ammonia water, counting the flow of the ammonia water and feeding back the data to the system, so as to accurately monitor the ammonia supply amount. The ammonia water point spraying gun 104 is fixedly connected with the denitration tower wall through flange connection and is arranged on the upper portion of the denitration module 4. The ammonia water point spraying gun 104 is used for uniformly and accurately spraying the ammonia water into the denitration tower, fully contacting with the flue gas and promoting the denitration reaction.

[0021] The real-time nitrogen oxide detection system 2 consists of a flue gas sampling gun 201 and a nitrogen oxide analyzer 202. The flue gas sampling gun 201 is connected to the wall of the denitrification tower via a flange and is located at the lower part of the denitrification module 4. It is connected to the nitrogen oxide analyzer 202 via a metal hose. The flue gas sampling gun 201 is installed on the wall of the denitrification tower via a flange and is located at the lower part of the denitrification module 4. It can extract representative flue gas samples from the denitrification tower. The extracted flue gas samples are transmitted to the nitrogen oxide analyzer 202 through the metal hose. The nitrogen oxide analyzer 202 performs precise analysis on the nitrogen oxide content in the sample and then transmits the measured flue gas nitrogen oxide data in real time to the host computer PLC of the precision ammonia injection control system 3, providing a data basis for subsequent precision control.

[0022] The nitrogen oxide analyzer 202 is connected to the precision ammonia injection control system 3, transmitting the real-time data of the measured flue gas nitrogen oxides to the host computer PLC of the precision spray gun control system. The ammonia water injection signal calculated by the host computer PLC system is sent to the ammonia water injection system 1. The host computer PLC system uses the PID algorithm to comprehensively calculate key data such as flue gas volume, inlet nitrogen oxide content, and outlet nitrogen oxide content of a single catalyst module. Based on the calculation results, an ammonia water injection control signal is issued to control the opening and closing of the injection solenoid valve 102, thereby achieving precise control of ammonia supply to a single catalyst module. At the same time, the system can also detect the denitrification efficiency of the catalyst module by combining real-time data, providing a basis for the stable operation and optimization adjustment of the entire system.

[0023] like Figure 2 and 4 As shown, the nitrogen and oxygen data monitoring module, i.e., the nitrogen and oxygen monitoring sensor, uploads the detected data to the 5081 data conversion module during data monitoring. Figure 3 The circuit diagram shows the data conversion module. The 5081 data conversion module converts sensor data into Modbus addresses and transmits the signals to the host PLC for real-time monitoring via the upper-level device. At the same time, the host PLC system runs its internal logic control program based on the real-time monitoring data. The instructions issued by the host computer are sent to each solenoid valve control device through the 5081 data conversion module.

[0024] When the intelligent denitrification control system for flue gas treatment is working, it uses the PID algorithm of the host computer PLC system to calculate data such as flue gas volume, inlet nitrogen oxide content, and outlet nitrogen oxide content of a single catalyst module. It then sends an ammonia water injection control signal to control the opening and closing of the injection solenoid valve 102, thereby achieving ammonia supply to the single catalyst module and real-time data detection. This allows for more precise supply of ammonia water to the system and simultaneous detection of the denitrification efficiency of the catalyst module. This denitrification system can achieve unattended intelligent operation through the host computer PLC control system.

[0025] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments should, therefore, be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims concerned.

[0026] Furthermore, it should be understood that although the present specification describes exemplary embodiments, the application is not limited to only one independent technical solution in each embodiment, and the specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A flue gas treatment intelligent denitration system, characterized in that: Including ammonia water point spray system (1), nitrogen oxide real-time detection system (2), accurate ammonia injection control system (3) and denitration module (4), the nitrogen oxide real-time detection system (2) is used to detect the nitrogen oxide value of each catalyst module outlet in the denitration tower, the nitrogen oxide real-time detection system (2) is calculated and corrected by PID algorithm Real-time ammonia water supply, the ammonia water point spray system (1) is used to receive ammonia water supply data, control ammonia supply, and the denitration module (4) is composed of a denitration tower.

2. The intelligent denitration system for flue gas treatment according to claim 1, characterized in that: The ammonia water point spray system (1) comprises an ammonia water pressure stabilizing tank (101), a point spray electromagnetic valve (102), a point spray flowmeter (103) and an ammonia water point spray gun (104).

3. The intelligent denitration system for flue gas treatment according to claim 2, characterized in that: The ammonia water pressure stabilizing tank (101) is connected with the point spray electromagnetic valve (102), the ammonia water point spray flowmeter (103) and the ammonia water point spray gun (104) through pipelines.

4. The intelligent flue gas treatment and denitration system according to claim 2, characterized in that: The point spray electromagnetic valve (102) is used to receive the point spray signal sent by the accurate ammonia injection control system (3).

5. The intelligent denitration system for flue gas treatment according to claim 2, characterized in that: The point spray flowmeter (103) is used to count the real-time flow of ammonia water.

6. The intelligent flue gas treatment and denitration system according to claim 2, characterized in that: The ammonia water point spray gun (104) is arranged on the upper portion of the denitration module (4) and is connected to the denitration tower wall through a flange.

7. The intelligent denitration system for flue gas treatment according to claim 1, characterized in that: The nitrogen oxide real-time detection system (2) is composed of a flue gas sampling gun (201) and a nitrogen oxide analyzer (202), the flue gas sampling gun (201) is arranged on the lower portion of the denitration module (4), one side of the flue gas sampling gun (201) is connected with the denitration tower wall through a flange, and the other side is connected with the nitrogen oxide analyzer (202) through a metal hose.

Images