CN209927816U - Continuous monitoring system for flue gas desulfurization - Google Patents
Continuous monitoring system for flue gas desulfurization Download PDFInfo
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- CN209927816U CN209927816U CN201822180000.0U CN201822180000U CN209927816U CN 209927816 U CN209927816 U CN 209927816U CN 201822180000 U CN201822180000 U CN 201822180000U CN 209927816 U CN209927816 U CN 209927816U
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Abstract
A continuous monitoring system for flue gas desulfurization comprises a flue gas sampling system, a flue gas monitoring system and a data processing system, wherein the flue gas monitoring system comprises a gaseous substance monitoring unit, a smoke dust monitoring unit and a flue gas parameter monitoring unit, and the gaseous substance monitoring unit comprises SO2Monitoring device, NOx monitoring device and O2And (5) monitoring equipment. The gaseous substance monitoring unit is also provided with at least one of free ammonia monitoring equipment, hydrogen chloride monitoring equipment and hydrogen fluoride monitoring equipment. The flue gas parameter monitoring unit comprises flue gas flow rate, static pressure, temperature and humidity monitoring equipment. Data processing systemThe device comprises a data input module, an upper computer workstation, monitoring software, a flue gas flow calculation unit and a pollutant reduced concentration calculation unit. The monitoring system can continuously sample and monitor the flue gas in real time, has real, comprehensive and reliable monitoring data, and can efficiently guide production operation. The flue gas sampling system is provided with a back flushing unit to prevent flue gas from polluting the parts of the analyzer. The sampling and extracting pipe and the converter are designed to be corrosion-resistant, so that the long-period reliable operation of the system is ensured. The system design is stable and reliable, the maintenance cost is low, and the maintenance amount is small.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, concretely relates to continuous monitoring system for flue gas desulfurization.
Background
The flue gas of various combustors, industrial and commercial boilers contains a large amount of substances such as sulfur dioxide, nitrogen oxides, smoke dust and the like, and serious pollution is caused to the atmosphere. On-line monitoring of pollutants in flue gases is an important aspect of environmental protection efforts. The on-line continuous flue gas monitoring system (CEMS) is used for continuously monitoring the concentration and the total emission amount of gaseous pollutants and particulate matters emitted by an air pollution source and finishing information real-time transmission, can transmit emission data to an environment administration department in real time so as to facilitate environmental protection supervision, and can also transmit the emission data to environmental protection facilities, such as a DCS control system of devices for desulfurization, denitration, dust removal and the like, and carries out system adjustment according to real-time inlet and outlet flue gas data so as to maintain the emission index of the pollutants to reach the standard stably.
Continuous monitoring system for flue gas to gaseous Substances (SO)2、NOx、O2) The concentration and the total emission amount of the dust (particulate matters), and the flue gas parameters (flue gas flow rate, flue gas temperature, flue gas pressure, flue gas oxygen content, flue gas humidity and the like) are monitored. The monitoring data is processed by data acquisition and is real-time collected by the communication subsystem, dry basis, wet basis and converted concentration corresponding to each concentration value are generated, the accumulated discharge amount of the day, the month and the year is generated, the compensation of lost data is completed, and the report is real-time transmitted to a governing department and a DCS.
Disclosure of Invention
An object of the utility model is to provide a continuous monitoring system for flue gas desulfurization, a serial communication port, including gaseous state material monitoring system, smoke and dust (particulate matter) monitoring system, flue gas parameter monitoring system and data acquisition and processing subsystem.
The utility modelThe novel technical scheme is that the continuous monitoring system for flue gas desulfurization comprises a flue gas sampling system, a flue gas monitoring system and a data processing system, and is characterized in that the flue gas monitoring system comprises a gaseous substance monitoring unit, a smoke dust (particulate matter) monitoring unit and a flue gas parameter monitoring unit, and the gaseous substance monitoring unit comprises SO2Monitoring device, NOx monitoring device and O2And (5) monitoring equipment.
Further, the gaseous substance monitoring unit further comprises at least 1 of free ammonia monitoring equipment, hydrogen chloride monitoring equipment and hydrogen fluoride monitoring equipment. Determining the analysis frequency of the chlorine and fluorine ions in the absorption liquid according to the detection data of the hydrogen chloride and the hydrogen fluoride, and selecting whether the integrated drying equipment is used or not, the use frequency and the like according to the analysis frequency, wherein the sum of the concentration of the chlorine and fluorine ions in the flue gas is higher than 20mg/Nm3When in use, an absorbent is added into the ammonia desulphurization concentration circulating system to adjust the pH value of the concentrated crystals.
Further, SO2The monitoring equipment comprises formaldehyde absorption-pararosaniline spectrophotometry monitoring equipment and ultraviolet non-spectrophotometry monitoring equipment, and preferably ultraviolet non-spectrophotometry equipment.
Furthermore, the NOx monitoring device adopts an ultraviolet absorption method monitoring device, a chemiluminescence method monitoring device and a non-spectroscopic infrared method monitoring device, and preferably the non-spectroscopic infrared method monitoring device.
Further, the measurement is performed by converting NOx entirely to NO in a high temperature environment by a catalyst using a converter, preferably a carbon molybdenum mixed catalyst.
Further, O2The monitoring equipment adopts electrochemical oxygen monitoring equipment.
Further, the smoke (particulate matter) monitoring unit comprises at least 1 of beta-ray method detection equipment, gravimetric method detection equipment and laser front scattering method detection equipment, and preferably the laser front scattering method detection equipment.
Furthermore, the flue gas parameter monitoring unit comprises flue gas flow rate monitoring equipment, flue gas static pressure monitoring equipment, flue gas temperature monitoring equipment and flue gas humidity monitoring equipment.
Further, the flue gas flow velocity and flue gas pressure monitoring equipment is a differential pressure transmitter, and the flow velocity of the flue gas is obtained by measuring the total pressure and the static pressure in the flue gas flow.
Further, the flue gas temperature detection device is a temperature sensor, preferably a thermocouple, a thermistor and a platinum resistor, and more preferably a platinum resistor temperature sensor.
Furthermore, the flue gas humidity adopts dry-wet oxygen method detection equipment and resistance-capacitance method monitoring equipment, and resistance-capacitance method detection equipment is preferred.
Furthermore, the data processing system comprises a data input module, an upper computer workstation and monitoring software, wherein the upper computer workstation further comprises a flue gas flow calculation unit and a pollutant conversion concentration calculation unit.
Furthermore, the flue gas sampling system is provided with a back flushing unit to prevent flue gas from polluting the parts of the analyzer.
Further, all the sampling and extracting pipes and the converter are made of stainless steel, preferably 316L.
The utility model has the advantages that: the smoke can be sampled and monitored continuously in real time, the monitoring data is real, comprehensive and reliable, and the production operation can be guided efficiently. The flue gas sampling system is provided with a back flushing unit to prevent flue gas from polluting the parts of the analyzer. The sampling and extracting pipe and the converter are designed to be corrosion-resistant, so that the long-period reliable operation of the system is ensured. The system design is stable and reliable, the maintenance cost is low, the maintenance amount is small, the content of the chlorofluoro-ions is monitored in real time, and accordingly, the absorption liquid analysis frequency, the adding amount of the concentrated circulating system absorbent and the operation scheme of the integrated drying equipment are determined.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
FIG. 1 shows a schematic view of a
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The continuous monitoring system for flue gas desulfurization comprises a flue gas sampling system, a flue gas monitoring system and a data processing system, and is characterized in that the flue gas monitoring system comprises a gaseous substance monitoring unit, a smoke dust (particulate matter) monitoring unit and a flue gas parameter monitoring unit, and the gaseous substance monitoring unit comprises SO2Monitoring device, NOx monitoring device and O2And (5) monitoring equipment.
Further, the gaseous substance monitoring unit further comprises at least 1 of free ammonia monitoring equipment, hydrogen chloride monitoring equipment and hydrogen fluoride monitoring equipment.
Further, SO2The monitoring equipment comprises formaldehyde absorption-pararosaniline spectrophotometry monitoring equipment and ultraviolet non-spectrophotometry monitoring equipment, and preferably ultraviolet non-spectrophotometry equipment.
Furthermore, the NOx monitoring device adopts an ultraviolet absorption method monitoring device, a chemiluminescence method monitoring device and a non-spectroscopic infrared method monitoring device, and preferably the non-spectroscopic infrared method monitoring device.
Further, the measurement is performed by converting NOx entirely to NO in a high temperature environment by a catalyst using a converter, preferably a carbon molybdenum mixed catalyst.
Further, O2The monitoring equipment adopts electrochemical oxygen monitoring equipment.
Further, the smoke (particulate matter) monitoring unit comprises at least 1 of beta-ray method detection equipment, gravimetric method detection equipment and laser front scattering method detection equipment, and preferably the laser front scattering method detection equipment.
Furthermore, the flue gas parameter monitoring unit comprises flue gas flow rate monitoring equipment, flue gas static pressure monitoring equipment, flue gas temperature monitoring equipment and flue gas humidity monitoring equipment.
Further, the flue gas flow velocity and flue gas pressure monitoring equipment is a differential pressure transmitter, and the flow velocity of the flue gas is obtained by measuring the total pressure and the static pressure in the flue gas flow.
Further, the flue gas temperature detection device is a temperature sensor, preferably a thermocouple, a thermistor and a platinum resistor, and more preferably a platinum resistor temperature sensor.
Furthermore, the flue gas humidity adopts dry-wet oxygen method detection equipment and resistance-capacitance method monitoring equipment, and resistance-capacitance method detection equipment is preferred.
Furthermore, the data processing system comprises a data input module, an upper computer workstation and monitoring software, wherein the upper computer workstation further comprises a flue gas flow calculation unit and a pollutant conversion concentration calculation unit.
Furthermore, the flue gas sampling system is provided with a back flushing unit to prevent flue gas from polluting the parts of the analyzer.
Further, all the sampling and extracting pipes and the converter are made of stainless steel, preferably 316L.
Examples
A continuous monitoring system for flue gas desulfurization comprises a flue gas sampling system, a flue gas monitoring system and a data processing system. The flue gas monitoring system comprises a gaseous substance monitoring unit, a smoke dust (particulate matter) monitoring unit and a flue gas parameter monitoring unit, wherein the gaseous substance monitoring unit comprises SO2Ultraviolet non-spectroscopic method equipment, NOx non-spectroscopic infrared method monitoring equipment and O2An electrochemical oxygen monitoring device.
The NOx is measured by total conversion to NO in a high temperature environment using a carbon molybdenum mixed catalyst. The gaseous substance monitoring unit further comprises a free ammonia monitoring device, a hydrogen chloride monitoring device and a hydrogen fluoride monitoring device.
The smoke (particulate matter) monitoring unit comprises a laser front scattering method detection device.
The flue gas parameter monitoring unit comprises a differential pressure transmitter, and the pressure and the flow rate of the flue gas are obtained simultaneously by measuring the total pressure and the static pressure in the flow of the flue gas. The device also comprises a platinum resistance temperature sensor flue gas temperature monitoring device and a resistance-capacitance method flue gas humidity monitoring device. The sampling data processing system comprises a data input module, an upper computer workstation and monitoring software, wherein the upper computer workstation further comprises a flue gas flow calculation unit and a pollutant reduced concentration calculation unit.
The flue gas sampling system is provided with a back flushing unit to prevent flue gas from polluting the parts of the analyzer.
All sampling and extracting pipes and converters are made of stainless steel, and preferably 316L.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (3)
1. The continuous monitoring system for flue gas desulfurization is characterized by comprising a flue gas sampling system, a flue gas monitoring system and a data processing system, wherein the flue gas monitoring system comprises a gaseous substance monitoring unit, a smoke dust particulate matter monitoring unit and a flue gas parameter monitoring unit, and the gaseous substance monitoring unit comprises SO2Monitoring device, NOx monitoring device and O2Monitoring equipment;
the gaseous substance monitoring unit is also provided with at least 1 of free ammonia monitoring equipment, hydrogen chloride monitoring equipment and hydrogen fluoride monitoring equipment;
SO2the monitoring equipment comprises formaldehyde absorption-pararosaniline spectrophotometry monitoring equipment or a non-spectrophotometric infrared gas analyzer;
the NOx monitoring equipment adopts ultraviolet absorption method monitoring equipment, chemiluminescence method monitoring equipment or non-spectroscopic infrared monitoring equipment;
a catalytic converter for catalytically converting NOx into NO is arranged; the method comprises the following steps of (1) completely converting NOx into NO by a catalyst in a high-temperature environment by using a catalytic converter, wherein the catalytic converter adopts a carbon-molybdenum mixed catalyst;
the O2 monitoring equipment adopts electrochemical oxygen monitoring equipment;
the smoke dust and particulate matter monitoring unit comprises at least 1 of beta-ray method detection equipment, gravimetric method detection equipment and laser front scattering method detection equipment;
the flue gas parameter monitoring unit comprises flue gas flow velocity monitoring equipment, flue gas static pressure monitoring equipment, flue gas temperature monitoring equipment and flue gas humidity monitoring equipment; the flue gas flow velocity and flue gas pressure monitoring equipment is a differential pressure transmitter, and the flow velocity of the flue gas is obtained by measuring the total pressure and the static pressure in the flow of the flue gas;
the smoke temperature detection equipment is a temperature sensor and comprises a thermocouple, a thermistor and a platinum resistor; the flue gas humidity adopts dry-wet oxygen method detection equipment or resistance-capacitance method monitoring equipment.
2. The monitoring system of claim 1, wherein the data processing system comprises a data input module, an upper computer workstation and monitoring software, and the upper computer workstation comprises a flue gas flow calculation unit and a pollutant reduced concentration calculation unit.
3. The monitoring system of claim 1, wherein the flue gas sampling system is provided with a back-flushing unit to prevent flue gas from contaminating the analytical instrument components.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822180000.0U CN209927816U (en) | 2018-12-25 | 2018-12-25 | Continuous monitoring system for flue gas desulfurization |
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| CN201822180000.0U CN209927816U (en) | 2018-12-25 | 2018-12-25 | Continuous monitoring system for flue gas desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023180610A1 (en) * | 2022-03-22 | 2023-09-28 | Universidade De Santiago De Compostela | Device for real-time automated monitoring of gases |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023180610A1 (en) * | 2022-03-22 | 2023-09-28 | Universidade De Santiago De Compostela | Device for real-time automated monitoring of gases |
| ES2952195A1 (en) * | 2022-03-22 | 2023-10-30 | Univ Santiago Compostela | AUTOMATED AND REAL-TIME GAS MONITORING DEVICE (Machine-translation by Google Translate, not legally binding) |
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