CN107941718B - Flue gas pollutant environment monitoring system - Google Patents
Flue gas pollutant environment monitoring system Download PDFInfo
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- CN107941718B CN107941718B CN201711195952.3A CN201711195952A CN107941718B CN 107941718 B CN107941718 B CN 107941718B CN 201711195952 A CN201711195952 A CN 201711195952A CN 107941718 B CN107941718 B CN 107941718B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/3103—Atomic absorption analysis
- G01N2021/3107—Cold vapor, e.g. determination of Hg
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Abstract
A kind of flue gas pollutant continuous monitor system, for monitoring elemental mercury in flue gas, ionic mercury and the content of total mercury, wherein influence of the absorption particle of particulate filter in channel for testing result can be reduced by the setting of sampling channel and detection system.Flue gas pollutant continuous monitor system of the invention; it can be used in chemical plant; the accurate continuous monitoring of the stationary sources mercury emissions such as coal fired thermal power plant, destructor plant provides real-time reliable data to realize the emission control for pollution sources for environmental monitoring and environmental protection.
Description
Technical field
The present invention relates to a kind of automatic monitoring systems, more particularly, to a kind of flue gas pollutant automatic monitoring system.
Background technique
Mercury is the highly unwanted element of a kind of pair of human body, it has volatility and accumulation property.A huge sum of money as priority control
One of belong to, excessive mercury emissions can not only pollute air, but also can by the exchange of various environmental interfaces, Xiang Shui, soil mobility,
Harm is generated to ecological environment and human health.The mercury of high concentration is contacted the nervous system and growth and development generation shadow to human body
It rings, sucking is a certain amount of so that human limb is deformed, and disability is until dead.
Mercury pollution has been acknowledged as the another big pollution after coal-fired sulphur ammonia pollution and Particulate Pollution in recent years and has asked
Topic.Causing the source of atmosphere mercury pollution mainly has two parts: artificially releasing mercury source and releases mercury naturally.Artificially release mercury source include it is coal-fired,
Waste incineration, chlor-alkali production etc., wherein coal fired thermal power plant is the largest one of artificial source of release；Naturally releasing mercury includes crust materials
Spontaneous release, natural water discharge, geothermal activity etc., mainly based on gaseous elemental mercury.
China is world's first coal power, and the ratio of coal is up to 75% in energy resource structure, and due to China's coal combustion technology
Generally fall behind, the mercury of fire coal release is even more serious to the pollution of Environment-Ecosystem.Coal fired thermal power plant, chemical plant etc. are fixed at present
The emission control of pollution sources mercury is more and more concerned, and to the accurate on-line continuous monitoring of mercury in flue gas is one of demercuration control
Important prerequisite.
Ontario chemical method is American Society Testing and Materials (American Society for Testing and
Materials, ASTM) promulgate in flue gas emission elemental mercury, ionic mercury, particle mercury standard detecting method.
The sample for extracting filtering is passed through a series of chemical reagent bottle by it, carries out the absorption of gaseous mercury, wherein 3 are equipped with KCl solution
Absorption bottle absorb ionic mercury, 1 be equipped with HN03/ H202Absorb the elemental mercury of part, behind using 3 contain potassium permanganate
The absorption bottle of sulfuric acid solution fully absorbs elemental mercury, and moisture removal is discharged clean flue gas using silica gel by last 1, then
The liquid of absorption bottle reuses SnCl by saving after a series of constant volume after chemical treatments2Member is converted by all ionic mercuries
Plain state mercury is absorbed using cold vapor atoms fluorescence or cold vapor atoms and carries out quantitative analysis.
Ontario chemical method needs a large amount of chemical reagent, and structure is complicated, is easy to happen leakage, and can only grasp by hand
Make, it cannot on-line automaticization continuously monitoring.To solve the above-mentioned problems, 201310094764.7 patent of invention proposes one kind
Flue gas form mercury emissions continuous monitor system, wherein can using only less Klorvess Liquid and bivalent mercury reducing solution
Realize the continuous monitoring for gas mercury.But there is still a need for use chemical reagent, while its sampling probe needs in the invention
Filter is set, and the particle adsorbed on filter when flue gas passes through filter can aoxidize the element mercury in flue gas, and measurement is caused to be tied
The content of element mercury is less than normal in fruit.In the prior art, it can be avoided the absorption of particulate filter by inertial separation filter
Oxidation of the grain for element mercury, but it is not so good as particulate filter for the filter effect of molecule, and it is unfiltered small
Particle may damage the instrument in subsequent circuit.
Summary of the invention
Improvement of the present invention as the prior art provides a kind of flue gas pollutant automatic monitoring system, can reduce chemistry
The use of reagent, while influence of the particle for testing result in particulate filter can be reduced.
As one aspect of the present invention, a kind of flue gas pollutant continuous monitor system is provided, comprising: sampled subsystem,
First condenser heats reduction reactor, total mercury measuring device, the second condenser, heater, element mercury measuring device and control
Device processed；The sampled subsystem includesThe sampling channel of shape, the first sampling pump, solenoid valve and the second sampling pump；It is described to adopt
Sample channel vertical direction lower end is connected with the first sampling pump, and horizontal direction right end is connect by solenoid valve with the second sampling pump；
Particulate filter is arranged in the sampling channel vertical pipeline, and the height of the particulate filter is lower than the level of the sampling channel
Pipeline；The working condition of first sampling pump is continuous sampling, is adopted by the second sampling pump of solenoid valve control with specific period
Sample；First condenser is connect with first sampling pump, and the flue gas for exporting vertical pipeline condenses；It is described to add
Thermal reduction reaction device is connect with the condenser, for bivalent mercury in sample gas to be reduced to element mercury；The heating reduction
The output gas of reactor enters total mercury measuring device, measures the total mercury in flue gas by total mercury measuring device；Described second is cold
Condenser is connect with second sampling pump, and the flue gas for exporting horizontal pipeline condenses；The heater and described the
Two condensers connection, for will be heated by the sample gas after second condenser；Sample gas after heating into
Enter element mercury measuring device, the element mercury content in flue gas is measured by the element mercury measuring device；The controller control
By the sampling period of the second sampling pump described in the solenoid valve control, while receiving total mercury measuring device and element mercury measurement
The detection data of device provides the testing result of monitoring system.
Preferably, the sampling period is less than the 1/2 of idling cycle.
Preferably, the controller provides the real-time content of total mercury in flue gas according to the detection data of total mercury measuring device
ρAlways；The controller provides flue gas and adopts at this according to the detection data and sampling period data of the element mercury measuring device
The real-time content ρ of sample period interior element mercury0。
Preferably, the controller is according to the detection data of total mercury measuring device, the detection data of element mercury measuring device
And sampling period data, provide flue gas mercuric content ρ within the sampling period2=ρAlways- ρ0。
Preferably, the diameter of the vertical pipeline is at least 2 times of horizontal pipeline diameter.
Preferably, further include accelerating flow blocking element, be located at horizontal pipeline and vertical pipeline at the top of the acceleration flow blocking element
Junction top, extend to its bottom and horizontal pipeline and vertical pipeline junction towards the axis direction of vertical pipeline
Lower end is in same horizontal line.
Preferably, the angle of the acceleration flow blocking element and the vertical pipeline tube wall is 30 to 60 degree.
Preferably, heating temperature is 800 degree or more in the heating reduction reactor.
It optionally, is catalytic reduction reactor in the heating reduction reactor.
Preferably, the total mercury measuring device and element mercury measuring device measure mercury by Atomic Absorption Spectrometer and contain
Amount.
Preferably, temperature sensor is arranged in the inlet of the sampling channel, and the controller is according to the temperature sensing
The temperature setting of the heater is temperature identical with sampling channel inlet by the testing result of device.
Detailed description of the invention
Fig. 1 is the system structure diagram of the flue gas pollutant continuous monitor system of the embodiment of the present invention.
Fig. 2 is the sampling channel schematic diagram of the flue gas pollutant continuous monitor system of the preferred embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.Moreover, answering
Work as understanding, the feature not mutual exclusion of various embodiments described herein, and can be combined and transformation mistake various
Exist in journey.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
The flue gas pollutant continuous monitor system of the embodiment of the present invention, referring to Fig. 1, including sampled subsystem, the first condensation
Device 20, heat reduction reactor 30, total mercury measuring device 40, the second condenser 50, heater 60, element mercury measuring device 70 with
And controller 80.
Sampled subsystem is used to extract the flue gas for monitoring from flue by probe, can be made using iron or stainless steel
For the material of probe, other metal materials can also be used, such as are also sprayed with other metal materials of special coating, such as coat stone
The nickel-base alloy of English.
Sampled subsystem includesThe sampling channel 11 of shape, the first sampling pump 12, solenoid valve 13 and the second sampling pump 14.
The lower end of 11 vertical pipeline 15 of sampling channel is connected with the first sampling pump 12, and 16 right end of horizontal pipeline passes through solenoid valve 13 and the
The connection of two sampling pumps 14.
The diameter of vertical pipeline 15 is at least 2 times of 16 diameter of horizontal pipeline, and particulate filter 17 is arranged in vertical pipeline,
The height of grain filter 17 is lower than the horizontal pipeline of sampling channel 11.To, two filtration channels are formed in sampling channel 11,
Flue gas is moved downward with particle in sampling channel 11 with higher rate, and 16 interval of horizontal pipeline is taken out with lower rate
Gas, since without being extracted by horizontal pipeline 16, horizontal pipeline extracts the larger movement that keeps down of granular mass in flue gas
Be the sample gas with less particulate matter；When the flue gas moved downward passes through particulate filter 17, particle quilt therein
Grain filter 17 filters, and the sample gas for passing through particulate filter 17 in vertical pipeline 15 is the sample gas of not particulate matter.
The working condition of first sampling pump 12 be continuous sampling, control 80 by solenoid valve 13 control the second sampling pump 14 with
Specific period sampling.It can be set to 1/2 of such as sampling period less than idling cycle.First condenser 20 and the first sampling pump
12 connections, the flue gas for exporting vertical pipeline 15 condense, the influence for avoiding vapor therein from monitoring mercury.Add
Thermal reduction reaction device 30 is connect with the first condenser 20, and wherein heating temperature is 800 degree or more, is used for divalent in sample gas
Mercury is reduced to element mercury.Optionally, heat is catalytic reduction reactor in reduction reactor.Heat the output of reduction reactor 30
Gas enters total mercury measuring device 40, measures the total mercury in flue gas by total mercury measuring device 40.Total mercury measuring device 40 can be with
It is Atomic Absorption Spectrometer, by Atomic Absorption Spectrometry secondary element mercury content, total mercury content is determined by measurement result.
In above-mentioned total mercury Measurement channel, although the particle adsorbed on particulate filter 17 in vertical pipeline 15 can be by flue gas
In elemental mercury be bivalent mercury, but it will not have an impact the measurement of total mercury, therefore can obtain accurate total
Mercury measurement result.
Second condenser 50 is connect with the second sampling pump 14, and the flue gas for exporting horizontal pipeline 16 carries out condensation and avoids
The influence that vapor therein monitors mercury.Heater 60 is connect with the second condenser 50, for that will pass through the second condenser
Sample gas after 50 is heated.Temperature sensor can be set in the inlet of sampling channel 11, controller 80 is according to temperature
The testing result for spending sensor, sets temperature identical with 11 inlet of sampling channel for the heating temperature of heater 60.
Sample gas after heating enters element mercury measuring device 70, is measured in flue gas by element mercury measuring device 70
Element mercury content.Element mercury measuring device 70 can be Atomic Absorption Spectrometer, pass through Atomic Absorption Spectrometry secondary element mercury
Content.
In above-mentioned element mercury Measurement channel, due to being not provided with particulate filter, particulate filter flying dust not will receive
Influence of the grain for elemental mercury, to make the result of the element mercury measured will not be less than normal；Meanwhile passing through the sampling period
Setting reduces damage of the particulate matter for instrument in sample gas.
The control of controller 80 controls the sampling period of the second sampling pump 14 by solenoid valve 13, while receiving total mercury measurement dress
The detection data for setting 40 and element mercury measuring device 70 provides the testing result of monitoring system.Specifically, 80 basis of controller
The detection data of total mercury measuring device 40 provides the real-time content ρ of total mercury in flue gasAlways；According to the inspection of element mercury measuring device 70
Measured data and sampling period data provide flue gas in the real-time content ρ of the sampling period interior element mercury0.80 basis of controller
The detection data of total mercury measuring device 40, the detection data of element mercury measuring device 70 and sampling period data, provide flue gas
Mercuric content ρ within the sampling period2=ρAlways- ρ0。
Preferably, referring to fig. 2, it can be arranged in sampling channel 11 and accelerate flow blocking element 18, top is located at horizontal tube
The top on road 16 and the junction of vertical pipeline 15, extends to its bottom and horizontal pipeline towards the axis direction of vertical pipeline 15
Same horizontal line is in the lower end of vertical pipeline junction.To make to accelerate flow blocking element 18 backwards to horizontal pipeline 16 and erect
One lateral line of the junction on straight tube road 15 forms the accelerated passage of sampling flue gas, and the particle in flue gas is further in the channels
Accelerate, and accelerate flow blocking element 18 towards a lateral line of horizontal pipeline 16 and the junction of vertical pipeline 15 formed particulate matter compared with
Few region, to make to further decrease the molecule in the sampling flue gas of horizontal pipeline 16.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (5)
1. a kind of flue gas pollutant continuous monitor system, comprising: sampled subsystem, the first condenser heat reduction reactor, always
Mercury measurement device, the second condenser, heater, element mercury measuring device and controller；The sampled subsystem includesShape
Sampling channel, the first sampling pump, solenoid valve and the second sampling pump；Sampling channel vertical direction lower end and the first sampling
Pump is connected, and horizontal direction right end is connect by solenoid valve with the second sampling pump；Particle is arranged in the sampling channel vertical pipeline
Filter, the height of the particulate filter are lower than the horizontal pipeline of the sampling channel；The diameter of the vertical pipeline is at least
It is 2 times of horizontal pipeline diameter；The working condition of first sampling pump is continuous sampling, is sampled by solenoid valve control second
Pump is sampled with specific period；First condenser is connect with first sampling pump, the flue gas for exporting vertical pipeline
It is condensed；The heating reduction reactor is connect with first condenser, for bivalent mercury in sample gas to be reduced to
Element mercury；The output gas of the heating reduction reactor enters total mercury measuring device, measures flue gas by total mercury measuring device
In total mercury；Second condenser is connect with second sampling pump, and the flue gas for exporting horizontal pipeline condenses；
The heater is connect with second sampling pump, for will be heated by the sample gas after second condenser；
Sample gas after heating enters element mercury measuring device, measures the element mercury in flue gas by the element mercury measuring device and contains
Amount；The controller controls the sampling period by the second sampling pump described in the solenoid valve control, while receiving total mercury measurement
The detection data of device and element mercury measuring device provides the testing result of monitoring system.
2. flue gas pollutant continuous monitor system according to claim 1, it is characterised in that: the controller is according to total mercury
The detection data of measuring device provides the real-time content ρ of total mercury in flue gasAlways；The controller is filled according to the element mercury measurement
The detection data and sampling period data set provide flue gas in the real-time content ρ of the sampling period interior element mercury0。
3. flue gas pollutant continuous monitor system according to claim 2, it is characterised in that: the controller is according to total mercury
The detection data of measuring device, the detection data of element mercury measuring device and sampling period data, provide flue gas in the sampling
Mercuric content ρ in period2=ρAlways- ρ0。
4. the flue gas pollutant continuous monitor system according to one of claim 2-3, it is characterised in that: the heating reduction
Heating temperature is 800 degree or more in reactor.
5. flue gas pollutant continuous monitor system according to claim 4, it is characterised in that: the total mercury measuring device with
And element mercury measuring device measures mercury content by Atomic Absorption Spectrometer.
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| CN109253995B (en) * | 2018-10-31 | 2021-06-01 | 中国石油天然气股份有限公司 | Mercury isotope testing method and device for natural gas |
| CN111458458A (en) * | 2020-04-16 | 2020-07-28 | 南京理工大学 | Coal-fired flue gas multivalent mercury total concentration measuring device |
| CN111487370A (en) * | 2020-04-16 | 2020-08-04 | 南京理工大学 | Device and method for converting oxidized mercury and measuring total mercury content of flue gas |
| CN112630397B (en) * | 2020-12-14 | 2022-10-25 | 中国兵器工业第五九研究所 | Rainwater monitoring device |
| CN115728253B (en) * | 2022-10-28 | 2023-11-10 | 华能重庆珞璜发电有限责任公司 | Mercury detection device and method |
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| CN102564986B (en) * | 2011-12-30 | 2014-08-27 | 北京雪迪龙科技股份有限公司 | Smoke mercury emission monitoring system and method |
| CN102590153A (en) * | 2012-01-16 | 2012-07-18 | 青岛佳明测控仪器有限公司 | Device and method for quantitatively analyzing total mercury of atmosphere/smoke based on low-temperature plasma |
| CN202676520U (en) * | 2012-04-12 | 2013-01-16 | 中国科学院城市环境研究所 | Device for collecting different species of mercury in atmosphere |
| CN102998268A (en) * | 2012-11-22 | 2013-03-27 | 中科天融(北京)科技有限公司 | Smoke mercury online monitoring instrument |
| CN103293326B (en) * | 2013-03-22 | 2014-02-05 | 杭州超距科技有限公司 | Mercury-containing fumes emission continuous monitoring system and monitoring method thereof |
| CN103822934A (en) * | 2014-02-19 | 2014-05-28 | 中南大学 | On-line detection device and method for heavy metal content in flue gas |
| CN204514857U (en) * | 2015-03-27 | 2015-07-29 | 云南中烟工业有限责任公司 | The device of heavy metal in a kind of on-line analysis electronic cigarette smog |
| CN204656312U (en) * | 2015-05-29 | 2015-09-23 | 山西大学 | Synchronously realize the system of on-line monitoring gas mercury content and demercuration |
| CN204679482U (en) * | 2015-06-11 | 2015-09-30 | 中国神华能源股份有限公司 | Flue gas on-Line Monitor Device |
| CN105372191A (en) * | 2015-10-22 | 2016-03-02 | 燕山大学 | Gaseous elemental mercury spectrum monitoring method and monitoring device thereof |
| CN105334147B (en) * | 2015-12-04 | 2018-05-08 | 深圳睿境环保科技有限公司 | Particulate matter on-line monitoring system and method based on β ray methods and light scattering method |
| CN105628453A (en) * | 2016-02-01 | 2016-06-01 | 浙江天地环保工程有限公司 | Novel smoke sampling device |
| CN106040110B (en) * | 2016-05-25 | 2018-10-09 | 北京雪迪龙科技股份有限公司 | Mercury chloride restores heating chamber and mercury vapour generating means and method with the heating chamber |
| CN106918682A (en) * | 2017-05-08 | 2017-07-04 | 秦皇岛海涛万福环保设备股份有限公司 | A kind of flue gas real time on-line monitoring system in the smoke eliminator for Cremation Machine |
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