CN-122018461-A - Coal chemical industry waste gas data acquisition and monitoring control system

Abstract

The invention relates to the technical field of coal chemical engineering and industrial process automation control, in particular to a coal chemical waste gas data acquisition and monitoring control system which comprises a data acquisition unit, a linkage control unit and a first control instruction and a second control instruction, wherein the data acquisition unit is used for acquiring slurry pH value distribution data or catalyst activity surface area data obtained by a plurality of pH sensors or catalyst activity detectors arranged at different heights in a reaction tower, acquiring monitoring parameters of a waste gas discharge port, the linkage control unit is used for performing feedforward adjustment on reagent feeding when an upstream production load parameter and a waste gas inlet parameter jointly indicate that excessive pollutants enter the reaction tower, and performing real-time adjustment on reagent feeding amount according to the monitoring parameters of the waste gas discharge port.

Inventors

• Lu Gaoxing
• ZHANG CHENGUANG
• CHENG XIANGYANG
• ZHOU PENG
• DONG CHEN

Assignees

• 山西晋煤集团煤层气与煤基技术开发有限责任公司

Dates

Publication Date

20260512

Application Date

20260202

Claims (7)

1. 1. The utility model provides a coal industry waste gas data acquisition and monitor control system, its characterized in that is applied to exhaust treatment system, exhaust treatment system includes waste gas inlet pipeline, reaction tower and the exhaust emission mouth that communicate in proper order, be equipped with the nozzle that is used for spouting the medicament in the reaction tower, the system includes data acquisition unit for: collecting upstream production load parameters from a coal chemical industry production line; collecting exhaust gas inlet parameters of the exhaust gas inlet pipeline; collecting slurry pH value distribution data or catalyst activity surface area data obtained by a plurality of pH sensors or catalyst activity detectors arranged at different heights inside the reaction tower; collecting monitoring parameters of the exhaust gas discharge port; the linkage control unit is connected to the data acquisition unit and the reagent adding mechanism of the reaction tower and is used for: When the upstream production load parameter and the exhaust gas inlet parameter jointly indicate that excessive pollutants enter a reaction tower, generating a first control instruction to the medicament adding mechanism according to slurry pH value distribution data or catalyst active surface area data in the reaction tower so as to perform feedforward adjustment on medicament adding; generating a second control instruction to the medicament adding mechanism according to the monitoring parameters of the exhaust gas discharge port, and adjusting the medicament adding amount in real time; The first control instruction and the second control instruction jointly control the medicament adding mechanism so as to remove pollutants in the waste gas in a chemical absorption or catalytic reaction mode.
2. 2. The coal chemical industry waste gas data acquisition and monitoring control system according to claim 1, wherein the linkage control unit is specifically configured to: judging the pollutant load state in the exhaust gas inlet pipeline according to the change trend of the upstream production load parameter and the real-time value of the exhaust gas inlet parameter; And comparing the pollutant load state with a preset threshold value, and triggering the execution of the first control instruction when the threshold value is exceeded.
3. 3. The coal chemical industry waste gas data acquisition and monitoring control system according to claim 1, wherein the linkage control unit is specifically configured to: Judging the degree distribution of chemical absorption reaction in the reaction tower according to the pH values of the slurry at different heights in the reaction tower; Or judging the real-time effective reaction area of the catalyst according to the data of the active surface area of the catalyst; Determining an amount of medicament administered to be increased in the first control instruction based on the degree distribution or the real-time effective reaction area.
4. 4. The coal chemical industry waste gas data acquisition and monitoring control system according to claim 1, wherein the linkage control unit is specifically configured to: When the pollutant load state indicates that the impact load exceeds a steady-state threshold value and the slurry pH value distribution in the reaction tower indicates that the pH value of a reaction zone is about to be lower than a critical value or the active surface area of a catalyst is lower than an activity threshold value, executing the first control instruction, and starting the medicament adding mechanism to perform pre-adding operation; when the contaminant loading state indicates that the impact load exceeds a steady state threshold, but the slurry pH distribution or catalyst active surface area inside the reaction column indicates that the throughput is adequate, then the current dosage of medicament is maintained.
5. 5. The coal chemical industry waste gas data collection and monitoring control system according to claim 1, further comprising a fault diagnosis unit for: Calculating pollutant removal efficiency according to the exhaust gas inlet parameter and the exhaust gas outlet monitoring parameter; estimating theoretical medicament consumption according to the removal efficiency and a preset theoretical medicament consumption relation; acquiring the actual consumption of the medicament adding mechanism; and comparing the theoretical consumption with the actual consumption, and generating an alarm signal indicating nozzle blockage or instrument fault when the deviation continuously exceeds a preset range.
6. 6. The coal chemical industry waste gas data acquisition and monitoring control system according to claim 1, wherein: the upstream production load parameters comprise the coal feeding amount of the gasification furnace, the synthetic ammonia output index and the temperature of a combustion chamber; the exhaust gas inlet parameters comprise inlet exhaust gas flow, inlet sulfur dioxide concentration and inlet nitrogen oxide concentration; The internal state parameters of the reaction tower comprise slurry density of the desulfurization tower, operating frequency of a circulating pump or pressure difference of a denitration catalyst layer and reaction temperature according to different waste gas treatment processes.
7. 7. The coal chemical industry waste gas data acquisition and monitoring control system according to claim 1, wherein the data acquisition unit is connected to a distributed control system of a coal chemical industry production line and a programmable logic controller of the waste gas treatment system in parallel through an industrial communication interface conforming to an OPC protocol or a Modbus protocol so as to acquire the upstream production load parameter and the waste gas treatment related parameter.

Description

Coal chemical industry waste gas data acquisition and monitoring control system Technical Field The invention relates to the technical field of environmental protection engineering and industrial process automation control in coal chemical industry, in particular to a coal chemical industry waste gas data acquisition and monitoring control system. Background In the coal chemical waste gas treatment scene, waste gas emission is obviously influenced by production load fluctuation of an upstream gasification and synthesis section, complex chemical absorption and catalytic reaction processes are involved in a reaction tower, and the activity of a catalyst and the pH value of slurry dynamically change along with working conditions; The existing control scheme generally adopts a terminal feedback regulation mode, namely reversely regulating the dosage of the medicament only according to the online monitoring data of a discharge port, treating a reaction tower as a black box, lacking effective perception of upstream source load and intermediate state in the tower, and ensuring long-term reliable operation of the system because of the fact that the system cannot respond to instantaneous mutation of upstream pollutant concentration in time due to the inherent large hysteresis characteristic of physical transmission and chemical reaction and extremely easily causes emission instantaneous exceeding standard; Therefore, how to construct a control system integrating source prediction, process buffering and end verification to overcome the hysteresis of the system and improve the response speed and control accuracy of waste gas treatment becomes a technical problem to be solved; Disclosure of Invention In order to solve the technical problems, the invention provides a coal chemical industry waste gas data acquisition and monitoring control system, which specifically comprises the following technical scheme: Be applied to exhaust treatment system, exhaust treatment system includes waste gas inlet pipeline, reaction tower and the exhaust emission mouth that communicate in proper order, is equipped with the nozzle that is used for spouting the medicament in the reaction tower, and the system includes data acquisition unit for: collecting upstream production load parameters from a coal chemical industry production line; collecting exhaust gas inlet parameters of an exhaust gas inlet pipeline; Collecting slurry pH value distribution data or catalyst activity surface area data obtained by a plurality of pH sensors or catalyst activity detectors arranged at different heights inside the reaction tower; collecting monitoring parameters of an exhaust gas discharge port; the linkage control unit is connected to the data acquisition unit and the reagent adding mechanism of the reaction tower and is used for: When the upstream production load parameter and the exhaust gas inlet parameter jointly indicate that excessive pollutants enter the reaction tower, generating a first control instruction to a medicament adding mechanism according to slurry pH value distribution data or catalyst active surface area data in the reaction tower so as to perform feedforward adjustment on medicament adding; generating a second control instruction to the medicament adding mechanism according to the monitoring parameters of the exhaust gas discharge port, and adjusting the medicament adding amount in real time; The first control instruction and the second control instruction jointly control the medicament adding mechanism so as to remove pollutants in the waste gas in a chemical absorption or catalytic reaction mode. Preferably, the linkage control unit is specifically configured to: Judging the pollutant load state in the exhaust gas inlet pipeline according to the change trend of the upstream production load parameter and the real-time value of the exhaust gas inlet parameter; And comparing the pollutant load state with a preset threshold value, and triggering the execution of the first control instruction when the threshold value is exceeded. Preferably, the linkage control unit is specifically configured to: Judging the degree distribution of chemical absorption reaction in the reaction tower according to the pH values of slurry with different heights in the reaction tower; or judging the real-time effective reaction area of the catalyst according to the data of the active surface area of the catalyst; based on the degree distribution or the real-time effective reaction area, the required increased dosage of the medicament in the first control instruction is determined. Preferably, the linkage control unit is specifically configured to: when the pollutant load state indicates that the impact load exceeds a steady-state threshold value and the slurry pH value distribution in the reaction tower indicates that the pH value of a reaction zone is about to be lower than a critical value or the active surface area of a catalyst is lower than an activity t