CN108535154A - A kind of detection device and method of smoke secondary pollutant - Google Patents

A kind of detection device and method of smoke secondary pollutant Download PDF

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Publication number
CN108535154A
CN108535154A CN201810078136.2A CN201810078136A CN108535154A CN 108535154 A CN108535154 A CN 108535154A CN 201810078136 A CN201810078136 A CN 201810078136A CN 108535154 A CN108535154 A CN 108535154A
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concentration
flue gas
heating
detection
detecting
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CN108535154B (en
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孙中强
谭智友
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Shenyang Dongda Shan Hui Environment Technology Co Ltd
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Shenyang Dongda Shan Hui Environment Technology Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N2015/0042Investigating dispersion of solids
    • G01N2015/0046Investigating dispersion of solids in gas, e.g. smoke
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/06Investigating concentration of particle suspensions
    • G01N2015/0693Investigating concentration of particle suspensions by optical means, e.g. by integrated nephelometry

Abstract

The present invention provides a kind of detection device and method of smoke secondary pollutant, and detection device includes:Heating system is used to detect the particle concentration in flue gas with two Commercial pellet concentration detection systems and two flue gas detecting systems in the heating system entrance and exit, the Commercial pellet concentration detection system is arranged;The flue gas detecting system is for detecting various gas concentrations in flue gas.Detection method includes:The flue gas of drop containing dissolved matter will be carried and introduce heating system, while detecting heating system entrance flue gas Central Plains particle concentration and gas concentration, and obtain the concentration value under these substance standard states;Heating system is opened, makes to dry completely into the droplet in the flue gas of heating system, while detecting the total concentration and gas concentration of the secondary aerosol species and former particulate matter in heating system exit, and obtains the concentration value under these substance standard states;The concentration of the total concentration of exit particulate matter under standard state and entrance original particulate matter is subtracted each other up to secondary aerosol species value.

Description

A kind of detection device and method of smoke secondary pollutant
Technical field
The invention belongs to environmental protection technical fields, and in particular to a kind of detection device of smoke secondary pollutant and side Method.
Background technology
Flue gas carries after drop containing dissolved matter enters air and generates the atmosphere pollution that secondary aerosol species have been our identifications Major reason, and generate the arch-criminal of haze.But secondary aerosol species are into generating after air, and by temperature, The several factors such as humidity, wind direction, diffusion conditions influence, and generated time and generation position are uncertain, therefore are difficult detection.It adds The data of present detecting instrument detection are all just for gaseous pollutant and particle analyte detection, for the drop containing dissolved matter It can not detect, therefore it is out of control to cause droplet containing dissolved matter to monitor.For example wet method calcium method sulfur removal technology is to the detection data of sulphur There are deviation, present equipment can only detect gaseous sulphur, and current wet desulfurizing process, and flue gas vapor out is full With state, as long as there is temperature drop that droplet will be precipitated, these droplets and gaseous state SO2It is infinitely great to contact specific surface area, SO2Be easy to by The water separated out is dissolved to absorption, and detection device can not detect this part SO2, have a large amount of bisulfite in doctor solution Calcium, if calcium sulfite and SO can be resolved by escaping into after dehydration in air2, this part sulphur is also that can't detect, to lead Cause prohibited data detection.Have again has many dissolving salts and alkali by the doctor solution the inside that flue gas carries, since solution itself is transparent , current detection device is only able to detect solid particulate matter, and liquid solute is undetectable, and exactly these substances into Enter the secondary ultra-fine dust generated after air and is only the superfine particulate matter for leading to haze, i.e. PM2.5.Therefore, it is monitored to administrative law enforcement Bring larger difficulty.
Invention content
In view of the problems of the existing technology, the present invention provides a kind of detection device and method of smoke secondary pollutant. The technical scheme is that:
The first aspect, the present invention provide a kind of detection device of smoke secondary pollutant, including:Heating system and setting It is described in the two Commercial pellet concentration detection systems and two flue gas detecting systems of the heating system entrance and exit Commercial pellet concentration detection system is used to detect the particle concentration in flue gas, and the Commercial pellet concentration detection system is using sharp Light diffusing scattering refocusing principle;The flue gas detecting system is for detecting various gas concentrations in flue gas, the flue gas inspection system System uses spectroscopic methodology and electrochemical process;The Commercial pellet concentration detection system and the flue gas detecting system are equipped with temperature biography Sensor and pressure sensor.
Further, the heating system is specially to be equipped with the non-close socket of heating equipment.
The second aspect, the present invention provide a kind of detection method of smoke secondary pollutant, include the following steps:
(1) flue gas of drop containing dissolved matter will be carried and heating system is entered by pump gas power traction, while passing through Commercial pellet concentration Detecting system and flue gas detecting system detection heating system entrance flue gas Central Plains particle concentration and SO2、SO3, NO and NO2 Concentration, and obtain the concentration value under these substance standard states;
(2) heating system is opened, makes to dry completely into the droplet in the flue gas of heating system, while passing through Commercial pellet The total concentration of the secondary aerosol species and former particulate matter in concentration detection system and flue gas detecting system detection heating system exit with And SO2、SO3, NO and NO2Concentration, and obtain the concentration value under these substance standard states;
(3) total concentration of heating system exit particulate matter under standard state and the concentration of entrance original particulate matter are subtracted each other, two The concentration value difference of person is exactly secondary aerosol species value;And by heating system exit SO under standard state2、SO3, NO and NO2Concentration with into SO at mouthful2、SO3, NO and NO2Concentration is subtracted each other, and the concentration value difference of the two is exactly the sour gas of water mist dissolving and the pollution that salt decomposes Object value.
The size of secondary aerosol species value has just reflected can after the amount of flue gas carrying dissolved matter, that is, flue gas enter air To generate the ability of secondary aerosol species.It is exactly this discharge value for controlling flue gas to administer haze emphasis.Entrance and exit SO2、SO3、NO、NO2Difference be exactly the sour gas of water mist dissolving and the pollutant that salt decomposes, that is, false removing pollutant, Because these pollutants can also be released as droplet enters after air, detection method originally can not detect, because This causes actual discharge to be more than detection data.This is why our flue gases discharge by ultra-clean, it can also be to chimney corruption The very serious reason of erosion.
Due to that, containing free water droplet, can there is diluting effect, national regulation free water to pollutant after gasification in wet flue gas Discharge standard be 75 milligrams/cubic metre of <, many flue gas emissions can be in 200~300 milligrams/cubic metre or so, air at present Density in 1100000 milligrams/cubic metre, that is, this part dissociate it is water after accounting less than one thousandth, this is very Within the error of more detecting instruments, the count value of pollutant is influenced less, therefore is ignored, only in equipment calibration one And consider.
Beneficial effects of the present invention:The detecting system of the present invention is dried flue gas introducing heating system completely, at this time Droplet in H2SO3、H2SO4SO can be released because of dehydration2、SO3, and Ca (HSO3)2Resolve into SO2、H2O and CaSO3, He is precipitated in solute meeting dehydration, becomes solid particulate matter, and some substances can contain different crystallizations with temperature and humidity difference Water, and be increased to certain altitude with temperature and all lose the crystallization water.SO can be thoroughly solved in this way in detection process2、SO3、 NO、NO2Detection when escape, by heat temperature raising, reduce their true colours, keep its discharge value more accurate;Pass through Heat temperature raising makes the doctor solution class dissolved matter of escape be precipitated before detection, enters the particulate matter that could be generated after air originally, Into air previous existence at, therefore convenient for detection, but the size distribution detected at this time can be biased to grain size increase because air generate When the particulate matter that generates, therefore actually generate after diffusion can be more tiny, temperature when atmospheric temperature can be than detection It is low, therefore more multi-crystallization water can be contained, the particulate matter actually generated can be more than detection data, but they are directly proportional, so Detection data can reflect flue gas cleaning degree.Taxation and enforcement request can be met.The equipment has exposed a main mist Haze source, digitization demonstrate the haze origin cause of formation, provide theoretical foundation for haze improvement, allow science to control haze and become a reality.It avoids It blindly controls haze to injure to caused by society, allows people early to take leave of haze, injures early far from haze.Plug supervision leakage Hole is avoided and is lost to caused by country due to prohibited data detection, the perfect monitoring means to ultra-fine grain control.
This equipment can also be used for flue gas on-line monitoring, can cancel the Commercial pellet concentration inspection of entrance when doing on-line checking Examining system and flue gas detecting system.
Description of the drawings
Fig. 1 is the structural schematic diagram of the secondary aerosol species detection device of the present invention, wherein 1- pump gas machine, 2- flue gas inspections system System, 3- Commercial pellet concentration detection systems, 4- heating systems.
Specific embodiment mode
Commercial pellet concentration detection system model CCZ1000 used by the embodiment of the present invention.
The model ZYF-CEMS of flue gas detecting system used by the embodiment of the present invention.
The present invention is described in further details with specific embodiment below in conjunction with the accompanying drawings, described is the solution to the present invention It releases rather than limits.
The specific embodiment of the invention provides a kind of detection device of smoke secondary pollutant, as shown in Figure 1, including:Heating System and the two Commercial pellet concentration detection systems and two flue gases that are arranged in the heating system entrance and exit are examined Examining system;The heating system is specially to be equipped with the non-close socket of heating equipment;The Commercial pellet concentration detection system For detecting the particle concentration in flue gas, the Commercial pellet concentration detection system uses laser diffusing scattering refocusing principle; The flue gas detecting system uses spectroscopic methodology and electrochemistry for detecting various gas concentrations in flue gas, the flue gas detecting system Method;The Commercial pellet concentration detection system and the flue gas detecting system are equipped with temperature sensor and pressure sensor.
Embodiment 1
By above equipment, the present embodiment provides a kind of detection methods of smoke secondary pollutant, in Shenyang chemical plant 75 tons of boiler smoke Dual alkali equipment on done test experience, specifically include following steps:
(1) flue gas of drop containing dissolved matter will be carried and heating system is entered by pump gas power traction, while passing through Commercial pellet concentration Detecting system and flue gas detecting system detection heating system entrance flue gas Central Plains particle concentration and SO2、SO3、NO、NO2With O2Concentration, testing result are:Former particulate matter, 19 milligrams/cubic metre;SO2, 33 milligrams/cubic metre;SO3, 3 milligrams/cubic metre; NO, 44 milligrams/cubic metre;NO2, 4 milligrams/cubic metre;
(2) heating system is opened, so that the flue gas into heating system is dried completely, while passing through Commercial pellet Concentration Testing The total concentration and SO of the secondary aerosol species and former particulate matter in system and flue gas detecting system detection heating system exit2、SO3、 NO、NO2And O2Concentration, testing result are:Total particulate, 35 milligrams/cubic metre;SO2, 39 milligrams/cubic metre;SO3, 5 milligrams/ Cubic meter;NO, 44 milligrams/cubic metre;NO2, 4 milligrams/cubic metre;
Can be seen that secondary aerosol species by detection data above is 16 milligrams/cubic metre, SO2、SO3、NO2All increased Add, NO does not change.Also illustrate that original online detection instrument has been not suitable with current wet desulfurizing process simultaneously.
Embodiment 2
By above equipment, the present embodiment provides a kind of detection methods of smoke secondary pollutant, heat in Shenyang public Detection contrast experiment has been on 40 tons of boiler oxidation magnesium wet desulphurization equipments of department.Specifically include following steps:
(1) flue gas of drop containing dissolved matter will be carried and heating system is entered by pump gas power traction, while passing through Commercial pellet concentration Detecting system and flue gas detecting system detection heating system entrance flue gas Central Plains particle concentration and SO2、SO3、NO、NO2With O2Concentration, testing result are:Former particulate matter, 45 milligrams/cubic metre;SO2, 98 milligrams/cubic metre;SO3, 5 milligrams/cubic metre; NO, 215 milligrams/cubic metre;NO2, 11 milligrams/cubic metre;
(2) heating system is opened, so that the flue gas into heating system is dried completely, while passing through Commercial pellet Concentration Testing The total concentration and SO of the secondary aerosol species and former particulate matter in system and flue gas detecting system detection heating system exit2、SO3、 NO、NO2And O2Concentration, testing result are:Total particulate, 56 milligrams/cubic metre;SO2, 105 milligrams/cubic metre;SO3, 7 milligrams/ Cubic meter;NO, 215 milligrams/cubic metre;NO2, 13 milligrams/cubic metre;
Can be seen that secondary aerosol species by detection data above is 11 milligrams/cubic metre, SO2、SO3、NO2All increased Add.
Embodiment 3
By above equipment, the present embodiment provides a kind of detection methods of smoke secondary pollutant, heat in Shenyang public It is tested on 120 tons of heating boiler desulfurization by lime gypsum method flue gases of department, specifically includes following steps:
(1) flue gas of drop containing dissolved matter will be carried and heating system is entered by pump gas power traction, while passing through Commercial pellet concentration Detecting system and flue gas detecting system detection heating system entrance flue gas Central Plains particle concentration and SO2、SO3、NO、NO2With O2Concentration, testing result are:Former particulate matter, 36 milligrams/cubic metre;SO2, 74 milligrams/cubic metre;SO3, 4 milligrams/cubic metre; NO, 244 milligrams/cubic metre;NO2, 12 milligrams/cubic metre;
(2) heating system is opened, so that the flue gas into heating system is dried completely, while passing through Commercial pellet Concentration Testing The total concentration and SO of the secondary aerosol species and former particulate matter in system and flue gas detecting system detection heating system exit2、SO3、 NO、NO2And O2Concentration, testing result are:Total particulate, 42 milligrams/cubic metre;SO2, 85 milligrams/cubic metre;SO3, 3 milligrams/ Cubic meter;NO, 244 milligrams/cubic metre;NO2, 14 milligrams/cubic metre;
By this experiment it can be seen that the original unsuitable present sulfur removal technology of detection device.Secondary aerosol species 6 milligrams/cubic metre are increased, gaseous pollutant also all increased.
By above several embodiments as a result, it can be found that flue gas generally has secondary dirt to generate after heat temperature raising, And the secondary dirt of Dual alkali and magnesium oxide method is higher than limestone-gypsum method, SO2、SO3、NO2Three kinds of pollutants almost heat temperature raising It all increased afterwards, the SO of limestone-gypsum method2Increase more, the NO of several sulfur removal technologies has almost no change.
It can prove that wet desulphurization tail gas is the manufacture source of superfine particulate matter by above several embodiments, be the crime of haze Stalwart chief culprit.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, changes, replaces and deforms.

Claims (3)

1. a kind of detection device of smoke secondary pollutant, which is characterized in that including:Heating system and setting are in the heating The two Commercial pellet concentration detection systems and two flue gas detecting systems for the entrance and exit of uniting, the Commercial pellet concentration Detecting system is used to detect the particle concentration in flue gas, and the Commercial pellet concentration detection system is gathered again using laser diffusing scattering Burnt principle;The flue gas detecting system uses spectroscopic methodology for detecting various gas concentrations in flue gas, the flue gas detecting system And electrochemical process;The Commercial pellet concentration detection system and the flue gas detecting system are equipped with temperature sensor and pressure passes Sensor.
2. a kind of detection device of smoke secondary pollutant according to claim 1, which is characterized in that the heating system The non-close socket of heating equipment is specially installed.
3. a kind of detection method of smoke secondary pollutant is to use detection device described in claim 1, which is characterized in that Include the following steps:
(1) flue gas of drop containing dissolved matter will be carried and heating system is entered by pump gas power traction, while passing through Commercial pellet Concentration Testing System and flue gas detecting system detection heating system entrance flue gas Central Plains particle concentration and SO2、SO3, NO and NO2Concentration, And obtain the concentration value under these substance standard states;
(2) heating system is opened, makes to dry completely into the droplet in the flue gas of heating system, while passing through Commercial pellet concentration The total concentration of the secondary aerosol species and former particulate matter in detecting system and flue gas detecting system detection heating system exit and SO2、SO3, NO and NO2Concentration, and obtain the concentration value under these substance standard states;
(3) total concentration of heating system exit particulate matter under standard state and the concentration of entrance original particulate matter are subtracted each other, the two Concentration value difference is exactly secondary aerosol species value;And by heating system exit SO under standard state2、SO3, NO and NO2Concentration and entrance SO2、SO3, NO and NO2Concentration is subtracted each other, and the concentration value difference of the two is exactly the sour gas of water mist dissolving and the pollutant that salt decomposes Value.
CN201810078136.2A 2018-01-26 2018-01-26 Equipment and method for detecting secondary pollutants in flue gas Active CN108535154B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110779843A (en) * 2019-09-30 2020-02-11 成都市环境保护科学研究院 Typing analytic system of atmosphere secondary particle pollution process
CN112986086A (en) * 2021-04-16 2021-06-18 北京英视睿达科技有限公司 Primary emission monitoring method and device for fine particles, storage medium and equipment

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* Cited by examiner, † Cited by third party
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CN112986086A (en) * 2021-04-16 2021-06-18 北京英视睿达科技有限公司 Primary emission monitoring method and device for fine particles, storage medium and equipment

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