CN117007460A - Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant - Google Patents
Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant Download PDFInfo
- Publication number
- CN117007460A CN117007460A CN202310740566.7A CN202310740566A CN117007460A CN 117007460 A CN117007460 A CN 117007460A CN 202310740566 A CN202310740566 A CN 202310740566A CN 117007460 A CN117007460 A CN 117007460A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- gas
- detected
- particles
- area
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000003546 flue gas Substances 0.000 title claims abstract description 91
- 238000012544 monitoring process Methods 0.000 title claims abstract description 43
- 239000002245 particle Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007789 gas Substances 0.000 claims abstract description 78
- 238000009833 condensation Methods 0.000 claims abstract description 44
- 230000005494 condensation Effects 0.000 claims abstract description 44
- 239000000779 smoke Substances 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 21
- 230000001105 regulatory effect Effects 0.000 claims description 16
- 239000004065 semiconductor Substances 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 10
- 238000001179 sorption measurement Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000007791 dehumidification Methods 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 4
- 239000012855 volatile organic compound Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- QXTCFDCJXWLNAP-UHFFFAOYSA-N sulfidonitrogen(.) Chemical class S=[N] QXTCFDCJXWLNAP-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003518 caustics Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- -1 contains water Chemical compound 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G17/00—Apparatus for or methods of weighing material of special form or property
- G01G17/04—Apparatus for or methods of weighing material of special form or property for weighing fluids, e.g. gases, pastes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Immunology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to an on-line monitoring system and method for condensable particles in ultralow-emission flue gas of a coal-fired power plant, and belongs to the technical field of monitoring of ultralow-emission flue gas particles of the coal-fired power plant. The monitoring system comprises a flue gas pretreatment area, a monitoring condensation area and a tail gas treatment area; the smoke pretreatment area collects smoke to be detected and pretreats the smoke to be detected; the condensation area is monitored to perform condensation treatment on the pretreated flue gas to be detected, so that condensable particles in the flue gas to be detected are condensed, and the mass of the condensable particles is calculated; the tail gas treatment area purifies the gas exhausted from the monitoring condensation area and then discharges the purified gas into the atmosphere; the system also comprises a control module and an atmospheric temperature and humidity sensor for adjusting and monitoring the temperature and humidity of the condensation area, so that the condensable particles in the flue gas to be detected are coagulated and settled. The invention can monitor the condensable particles in the flue gas on line in real time and provides a certain data reference for environmental protection monitoring.
Description
Technical Field
The invention belongs to the technical field of monitoring of ultralow-emission flue gas particulate matters of coal-fired power plants, and relates to an online monitoring system and method of condensable particulate matters in ultralow-emission flue gas of coal-fired power plants.
Background
The flue gas after ultra-low emission modification of the coal-fired power plant is in a high-temperature high-humidity state, the temperature is 50-60 ℃, the flue gas mainly contains water, filterable particles, volatile Organic Compounds (VOCS) and nitrogen sulfides, part of the nitrogen sulfides, ammonia gas, hydrogen chloride and the VOCS can be coagulated and nucleated to generate condensable particles due to temperature and humidity changes, PM2.5 formed belongs to primary pollutants, the human body and the environment are greatly influenced, no equipment for on-line monitoring of the condensable particles is available at present, and the detection of the condensable particles is basically measured by using an impact condensation method and a dilution condensation method at present. This technique has the following disadvantages: (1) complicated measurement process, belonging to sampling detection; and (2) the detection time is long, and the consumable is more.
Disclosure of Invention
In view of the above, the invention aims to provide a system and a method for monitoring condensable particulate matters in ultralow emission flue gas of a coal-fired power plant, which can monitor the quantity of the condensable particulate matters on line in real time.
In order to achieve the above purpose, the present invention provides the following technical solutions:
according to the scheme I, the on-line monitoring system for the condensable particles in the ultralow-emission flue gas of the coal-fired power plant comprises a flue gas pretreatment area 1, a monitoring condensation area 2 and a tail gas treatment area 3 which are sequentially connected. The smoke pretreatment area 1 collects smoke to be detected and pretreats the smoke to be detected; the condensation area 2 is monitored to perform condensation treatment on the pretreated flue gas to be detected, so that condensable particles in the flue gas to be detected are condensed and settled, and the mass of the condensable particles is calculated; the tail gas treatment area 3 purifies the gas exhausted from the monitoring condensation area 2 and then is discharged into the atmosphere, and meanwhile, the tail gas treatment area 3 also provides gas flow power.
The system also comprises a control module and an atmospheric temperature and humidity sensor, wherein the control module is used for adjusting and monitoring the temperature and humidity of the condensation area 2 according to the atmospheric temperature and humidity collected by the atmospheric temperature and humidity sensor, so that the condensable particles in the flue gas to be detected are condensed and settled.
Optionally, the flue gas pretreatment area comprises a sampling gun 4, a heater 5, a high-efficiency filter 7 and a high-performance dehumidifying film 8 which are sequentially connected; the heater 5 is used for heating the flue gas temperature to be measured to be above the dew point temperature; the high-efficiency filter 7 is used for filtering filterable particles in the flue gas to be tested; the high-performance dehumidifying film 8 is used for absorbing moisture in the flue gas to be tested. Wherein the sampling gun, the heater high-efficiency filter and the high-performance dehumidifying film are all wrapped by adopting a high-temperature-resistant heat tracing pipeline.
Optionally, the monitoring condensation zone 2 comprises a gas mass flow meter I9, a condensation chamber 10, a glass fiber filter membrane and high performance dehumidification membrane 11, a flow regulating valve 12 and a gas mass flow meter ii 13 connected in sequence. The gas mass flowmeter I9 is used for detecting the mass flow and the flow rate of the smoke to be detected; the condensation chamber 10 is used for condensing and settling condensable particles in the flue gas to be detected; the glass fiber filter membrane and the high-performance dehumidifying membrane 11 are used for intercepting coagulated but unsettled particles; the gas mass flowmeter II 13 is used for detecting the mass flow and the flow rate of the flue gas after condensation treatment; the flow regulating valve 12 is used to regulate the flow rate of the flue gas at the gas mass flow meter.
The gas mass flowmeter I9, the flow regulating valve 12 and the gas mass flowmeter II 13 are all connected with the control module.
Optionally, the condensation chamber comprises a semiconductor refrigeration sheet 16, an ultrasonic vibration atomizer 17 and an organic adsorption layer 18. The semiconductor refrigerating sheet and the ultrasonic vibration sprayer are respectively connected with the control module, and the flue gas to be detected in the condensation chamber is condensed under the control of the control module. The organic adsorption layer is used for absorbing condensable particles which are condensed and settled.
Optionally, the tail gas treatment zone 3 comprises a gas purifier 14 and a vacuum pump 15. The gas purifier purifies and monitors the flue gas that the condensation district got rid of, and the vacuum pump provides power for the gas flow.
In a second scheme, the method for online monitoring the condensable particulate matters based on the online monitoring system in the first scheme adopts a high-efficiency filter 7 and a high-performance dehumidifying film 8 to remove the filterable particulate matters and moisture in the flue gas to be tested, and then records the mass flow Q of the flue gas to be tested before condensation through a gas mass flowmeter I9 1 And flow velocity V 1 The method comprises the steps of carrying out a first treatment on the surface of the The flue gas to be detected is condensed and settled in the condensation chamber 10, after the condensed condensable particulate matters are absorbed by the organic adsorption layer 18, the glass fiber filter membrane and the high-performance dehumidifying membrane 11, the residual flue gas flows through the gas mass flow meter II 13, and the mass flow Q of the condensed flue gas is recorded by the gas mass flow meter II 13 2 And flow velocity V 2 。
The method controls the flow of the flue gas through the flow regulating valve 12 simultaneously, so that the flow rates of the flue gas at the gas mass flowmeter I9 and the gas mass flowmeter II 13 are equal, and then the mass of condensable particles in the flue gas to be detected is calculated based on the law of conservation of mass.
The invention has the beneficial effects that: the invention realizes condensation sedimentation of the condensable particles through the semiconductor refrigerating sheet and the ultrasonic vibration sprayer, records the flow and the flow velocity of the flue gas before and after condensation through the two gas mass flowmeters, can calculate the mass of the condensable particles in the flue gas to be detected based on the mass conservation law, has the characteristic of real-time on-line monitoring, can rapidly obtain the information of the condensable particles of the flue gas to be detected, and provides a certain data reference for environmental protection monitoring.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of an online monitoring system for condensable particulates according to the present invention;
FIG. 2 is a view showing the construction of a condensation chamber;
FIG. 3 is a circuit diagram of a control module;
FIG. 4 is a logic diagram of condensable particulate matter monitoring.
Reference numerals: 1-a flue gas pretreatment area; 2-monitoring the condensation zone; 3-a tail gas treatment zone; 4-sampling gun; 5-a heater; 6-a high-temperature resistant heat tracing pipeline; 7-a high efficiency filter; 8-a high performance dehumidification film; 9-a gas mass flowmeter I; 10-a condensing chamber; 11-glass fiber filter membrane and high-performance dehumidifying membrane; 12-a flow regulating valve; 13-a gas mass flowmeter II; 14-a gas purifier; 15-a vacuum pump; 16-semiconductor refrigerating sheets; 17-an ultrasonic vibration sprayer; 18-an organic adsorption layer; 19-a housing.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present invention by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the invention; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present invention, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1, the system comprises a flue gas pretreatment area 1, a monitoring condensation area 2, a tail gas treatment area 3, an atmospheric temperature and humidity sensor and a control module.
The flue gas pretreatment area 1 comprises a sampling gun 4, a heater 5, a high-efficiency filter 7 and a high-performance dehumidifying film 8 which are connected in sequence. The sampling gun 4 is provided with a high-temperature-resistant sampling probe, so that water vapor can be prevented from condensing on the surface of the probe and corrosive substances can be prevented from corroding the probe; the heater 5 has stable temperature control performance, so that the heating temperature of the flue gas is higher than the dew point temperature of the condensable particles; the high-efficiency filter 7 can filter filterable particulate matters and has high-temperature resistance; the high performance dehumidification film 8 can absorb moisture in the flue gas and does not react with other gas components, and needs periodic replacement. The components in the flue gas pretreatment area 1 are all wrapped by a high-temperature resistant heat tracing pipeline 6, so that the temperature is prevented from being reduced below the dew point temperature of condensable particles due to heat loss, and the pipeline is prevented from being blocked.
The monitoring condensation zone 2 comprises a gas mass flowmeter I9, a condensation chamber 10, a glass fiber filter membrane, a high-performance dehumidifying membrane 11, a flow regulating valve 12 and a gas mass flowmeter II 13 which are connected in sequence. Wherein the condensing chamber 10 comprises a semiconductor refrigerating plate 16, an ultrasonic vibration atomizer 17, an organic adsorption layer 18 and a housing 19, as shown in fig. 2. The gas mass flowmeter I9 can display the mass flow and the speed of the gas in the pipe at the moment and transmit a data signal to the control module according to the circuit; the semiconductor refrigerating sheet 16 and the ultrasonic oscillation sprayer 17 are positioned at the top end of the condensing chamber 10, the semiconductor refrigerating sheet 16 is connected to the control module through an electric signal, and the control module is used for realizing that the condensing chamber 10 and the atmosphere keep the same temperature and humidity according to data feedback of an atmospheric temperature and humidity sensor and matching with the ultrasonic oscillation sprayer; the organic adsorption layer 18 is positioned at the bottom end of the condensation chamber 10 and has the function of timely adsorbing moisture and VOCS condensate; the semiconductor refrigerating sheet, the ultrasonic oscillation sprayer and the organic adsorption layer are wrapped by a shell 19 made of a material with good heat conduction performance. The valve of the flow regulating valve 12 is regulated by a control module, and the regulating size of the valve is regulated according to the flow rate of the gas mass flowmeter I, so that the flow rates of the two gas mass flowmeters are equal.
The flue gas inlet end in the condensation chamber 10 is the same diameter as the flue gas outlet end but has a height difference. The glass fiber filter membrane and the high-performance dehumidifying membrane are arranged at the flue gas outlet end, and can prevent suspended matters in the condensing chamber from flowing out of the condensing chamber, wherein the high-performance dehumidifying membrane can absorb moisture and does not react with other gas components, and periodic replacement is needed.
The control module adopts MCU control unit, and gas mass flowmeter I, semiconductor refrigeration piece, ultrasonic wave concussion atomizer, gas mass flowmeter II, atmospheric temperature humidity transducer and flow control valve all are connected with MCU control unit, and MCU control unit receives the data of these components and handles, as shown in figure 3.
The working principle of the online monitoring system of the invention is as follows:
and the smoke to be tested is extracted by the sampling gun 4 under negative pressure and enters the sampling flue. When the flue gas flows to the heater 5, the temperature of the flue gas to be detected can be heated to be higher than the dew point temperature, and the heating temperature is set to be 200 ℃ because the mass concentration of sulfuric acid mist in the ultralow-emission flue gas is lower, so that the flue gas is in a dry flue gas state. The flue gas to be tested passes through the high-efficiency filter 7 in a dry flue gas state, and the high-efficiency filter 7 can filter filterable particulate matters to enable the flue gas to be tested to be in pure gaseous gas. When the flue gas to be measured flows through the high-performance dehumidifying film 8, moisture in the flue gas can be completely absorbed by the dehumidifying film, and the high-performance dehumidifying film 8 cannot react with other gases. The flue gas to be detected enters a monitoring condensation area 2, the flue gas passes through a gas mass flowmeter I9, and the instrument records the gas mass flow Q at the moment 1 And velocity V 1 . The flue gas to be tested enters through the air inlet at the lower end of the condensation chamber 10, at the moment, the control module obtains atmospheric temperature and humidity through the atmospheric temperature humidity sensor, the semiconductor refrigerating sheet 16 is fed back through the circuit, the temperature of the condensation chamber 10 is adjusted to be atmospheric temperature, the ultrasonic vibration sprayer 17 carries out spraying dehumidification according to the atmospheric humidity fed back by the control module, at the moment, the flue gas to be tested starts to be condensed due to temperature dip, and the ultrasonic vibration sprayer 17 releases ultrasonic waves at a specific frequency to promote the settlement of condensed particles. The flue gas is in a wet state at the moment, flows out from a flue gas outlet end above the condensation chamber 10, and is subjected to glass fiber filter membrane and high-performance dehumidifying membrane 11 to intercept non-settled condensed particles, and simultaneously absorbs moisture in the flue gas, so that the flue gas to be detected returns to a pure gaseous state again, flows through a gas mass flowmeter II 13, and the instrument records the gas mass flow Q at the moment 2 Since the gas contains only uncondensed gas, the temperature and humidity of the gas are substantially equal to the atmospheric temperature and humidity, and thus the gas can be regarded as a gaseous contaminant. Recording the flow of flue gas through a gas mass flowmeter I9 and a gas mass flowmeter IIThe time required for 13 is Δt. The flue gas is purified by a gas purifier 14, and a pressure pump 15 provides pumping power.
As shown in fig. 4, the atmospheric temperature and humidity sensor transmits the temperature and humidity to the MCU control unit, and the MCU control unit controls the semiconductor refrigeration sheet and the ultrasonic oscillation sprayer to maintain the same temperature and humidity as the atmosphere; the gas mass flowmeter I9 records the mass flow Q before condensation 1 And velocity V 1 The gas mass flowmeter II 13 records the condensed mass flow Q 2 And velocity V 2 MCU controls flow regulating valve 12 to make V 1 ＝V 2 (±3% error). The velocity and the cross-sectional area of the flue gas flowing through the gas mass flowmeter I9 and the gas mass flowmeter II 13 are the same, and the mass of the condensable particles can be obtained based on the law of conservation of mass and is as follows: m is M Coagulation ＝Δm＝Δt(Q 1 -Q 2 )。
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (7)
1. An on-line monitoring system of condensable particulate matters in ultralow emission flue gas of a coal-fired power plant, which is characterized in that: the system comprises a flue gas pretreatment area (1), a monitoring condensation area (2) and a tail gas treatment area (3) which are connected in sequence; the smoke pretreatment area (1) collects smoke to be detected and pretreats the smoke to be detected; the monitoring condensation area (2) condenses the pretreated flue gas to be detected, so that condensable particles in the flue gas to be detected are condensed, and the mass of the condensable particles is calculated; the tail gas treatment area (3) purifies the gas exhausted from the monitoring condensation area (2) and then discharges the purified gas into the atmosphere;
the system also comprises a control module and an atmospheric temperature and humidity sensor, wherein the control module adjusts the temperature and humidity of the monitoring condensation area (2) according to the atmospheric temperature and humidity collected by the atmospheric temperature and humidity sensor, so that the condensable particles in the flue gas to be detected are condensed and settled.
2. The on-line monitoring system of claim 1, wherein: the flue gas pretreatment area (1) comprises a sampling gun (4), a heater (5), a high-efficiency filter (7) and a high-performance dehumidifying film (8) which are sequentially connected; the heater (5) is used for heating the flue gas temperature to be measured to be above the dew point temperature; the high-efficiency filter (7) is used for filtering filterable particles in the flue gas to be tested; the high-performance dehumidifying film (8) is used for absorbing moisture in the flue gas to be detected.
3. The on-line monitoring system of claim 2, wherein: the sampling gun (4), the high-efficiency filter (7) of the heater (5) and the high-performance dehumidifying film (8) are all wrapped by adopting a high-temperature resistant heat tracing pipeline.
4. The on-line monitoring system of claim 1, wherein: the monitoring condensation area (2) comprises a gas mass flowmeter I (9), a condensation chamber (10), a glass fiber filter membrane, a high-performance dehumidifying membrane (11), a flow regulating valve (12) and a gas mass flowmeter II (13) which are connected in sequence; the gas mass flowmeter I (9) is used for detecting the mass flow and the flow rate of the smoke to be detected; the condensing chamber (10) is used for condensing and settling condensable particles in the flue gas to be detected; the glass fiber filter membrane and the high-performance dehumidifying membrane (11) are used for intercepting coagulated but unsettled particles; the gas mass flowmeter II (13) is used for detecting the mass flow and the flow rate of the flue gas after condensation treatment; the flow regulating valve (12) is used for regulating the flow rate of the flue gas at the gas mass flowmeter;
the gas mass flowmeter I (9), the flow regulating valve (12) and the gas mass flowmeter II (13) are respectively connected with the control module.
5. The on-line monitoring system of claim 4, wherein: the condensing chamber (10) comprises a semiconductor refrigerating sheet (16), an ultrasonic vibration sprayer (17) and an organic adsorption layer (18); the semiconductor refrigerating sheet (16) and the ultrasonic vibration sprayer (17) are respectively connected with the control module, and the flue gas to be detected in the condensing chamber (10) is condensed under the control of the control module; the organic adsorption layer (18) is used for absorbing condensable particles which are condensed and settled.
6. The on-line monitoring system of claim 1, wherein: the tail gas treatment zone (3) comprises a gas purifier (14) and a vacuum pump (15); the gas purifier (14) is used for purifying and treating the flue gas exhausted by the monitoring condensation area (2); the vacuum pump (15) provides power for the flow of gas.
7. An online monitoring method for condensable particulates for an online monitoring system according to any one of claims 1 to 6, characterized by: the method adopts a high-efficiency filter (7) and a high-performance dehumidifying film (8) to remove filterable particles and moisture in the flue gas to be detected, and then records the mass flow Q of the flue gas to be detected before condensation through a gas mass flowmeter I (9) 1 And flow velocity V 1 The method comprises the steps of carrying out a first treatment on the surface of the The flue gas to be detected is condensed and settled in the condensing chamber (10), condensed condensable particles are absorbed by the organic adsorption layer (18), the glass fiber filter membrane and the high-performance dehumidifying membrane (11), and then the residual flue gas flows through the gas mass flowmeter II (13), and the mass flow Q of the condensed flue gas is recorded by the gas mass flowmeter II (13) 2 And flow velocity V 2 ；
The method controls the flow of the flue gas through a flow regulating valve (12) simultaneously, so that the flow rate of the flue gas at a gas mass flowmeter I (9) and a gas mass flowmeter II (13) is equal, and then the mass of condensable particles in the flue gas to be detected is calculated based on a mass conservation law.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740566.7A CN117007460A (en) | 2023-06-21 | 2023-06-21 | Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740566.7A CN117007460A (en) | 2023-06-21 | 2023-06-21 | Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117007460A true CN117007460A (en) | 2023-11-07 |
Family
ID=88575305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310740566.7A Pending CN117007460A (en) | 2023-06-21 | 2023-06-21 | Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117007460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890166A (en) * | 2024-03-14 | 2024-04-16 | 山西泰瑞祥科技有限公司 | Air pollution monitoring device |
-
2023
- 2023-06-21 CN CN202310740566.7A patent/CN117007460A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117890166A (en) * | 2024-03-14 | 2024-04-16 | 山西泰瑞祥科技有限公司 | Air pollution monitoring device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105300744B (en) | System for flue gas NO and mercury of thermal power plant sample simultaneously and detect | |
| CN109959538B (en) | Device and method for testing sulfur trioxide and condensable particles emitted by fixed pollution source | |
| CN101524617A (en) | Method for removing moisture in gases by a Nafion tube | |
| CN117007460A (en) | Online monitoring system and method for condensable particles in ultralow-emission flue gas of coal-fired power plant | |
| CN108507918B (en) | Device and method for on-line monitoring concentration of ultralow-emission flue gas particles | |
| CN209117529U (en) | A kind of VOCs on-line monitoring system | |
| CN206440581U (en) | The dust concentration monitoring device of high-humidity gas fume | |
| CN110631971A (en) | Interference removing device and method for beta-ray particulate matter monitor | |
| CN108144383A (en) | Flue gas pollutant processing system and processing method, chimney | |
| CN110038389A (en) | A kind of processing equipment and processing method of harmful exhaust | |
| CN217211724U (en) | But gas-solid separation's atmosphere pollutant collection system | |
| CN219799374U (en) | Incinerator oxygen content detection device | |
| CN107271236B (en) | Core-shell type aerosol generating system and application thereof in preparation of core-shell type aerosol | |
| CN205192809U (en) | System for flue gas NO and mercury of thermal power plant sample simultaneously and detect | |
| CN104535725B (en) | Monitoring system | |
| CN204422487U (en) | A kind of monitoring system | |
| KR20080096932A (en) | Contamination removal method at vapor condensation gas | |
| CN109364671A (en) | A kind of chemical emission absorption tower | |
| CN106290121A (en) | A kind of experimental provision simulating wet desulphurization chimney inwall dewpoint corrosion | |
| CN111220423A (en) | Flue gas particulate matter collecting pipe and flue gas particulate matter collecting method | |
| CN110763369B (en) | Monitoring method for exhaust gas temperature emission index in colored smoke plume treatment project | |
| CN107376604A (en) | A kind of industrial fermentation waste gas dehumanization method and device | |
| CN209917576U (en) | Experimental device for activated carbon adsorption and steam desorption | |
| CN110245323B (en) | Calculation method for operating efficiency of air compressor system | |
| CN207271022U (en) | A kind of industrial fermentation exhaust gas dehydrating unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |