CN107132318A - A kind of stationary source VOC on-line monitoring systems - Google Patents
A kind of stationary source VOC on-line monitoring systems Download PDFInfo
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- CN107132318A CN107132318A CN201710457534.0A CN201710457534A CN107132318A CN 107132318 A CN107132318 A CN 107132318A CN 201710457534 A CN201710457534 A CN 201710457534A CN 107132318 A CN107132318 A CN 107132318A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
- G01N33/0032—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array using two or more different physical functioning modes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
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- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
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Abstract
The invention discloses a kind of stationary source VOC on-line monitoring systems, including VOC monitoring subsystems, Gas Parameters monitoring subsystem, data acquisition and procession subsystem, particle monitoring subsystem and blowback subsystem.The system is applied to the real-time monitoring to various industrial pollution source emission organic matters, can be with relevant parameters such as continuous monitoring methane, NMHC, total hydrocarbon, flue-gas temperature, pressure, flow velocitys, and emission index, total emission volumn etc. are counted, the data measured are effectively managed.Meanwhile, possess automatic blowing function, the dust of cartridge surface, prolonging service life of filter elements can be automatically removed；And automatic calibration function, without on duty, maintenance is reduced to greatest extent.
Description
Technical field
The present invention relates to the monitoring technical field of pollution sources in flue gas, and in particular to a kind of stationary source VOC is supervised online
Examining system.
Background technology
VOC (Volatile Organic Compound) scientific name volatile organic matter, according to determining for the World Health Organization
Justice, compound of the boiling point at 50-250 DEG C, at room temperature saturated vapour pressure deposited in vapour form at normal temperatures more than 133.32Pa
It is volatile organic matter (VOC) to be the type organic in air.VOC complicated components, the VOC detected at present has
Kind more than 300, by the difference of its chemical constitution, can be further divided into alkanes, aromatic hydrocarbons, alkenes, halohydrocarbon, esters, aldehydes, ketone
Class and other compounds etc., are generally existing and the complicated organic dirt of a class of composition in air, water quality, soil and other deposits
Contaminate thing.Its toxicity, excitant, carcinogenesis are affected greatly to human health, the nerve that people can be caused damage, pulmonary toxicity,
The infringements such as septicemia, nephrotoxicity, liver and metabolism poisoning.Therefore, the presence of volatile organic matter in research environment,
Source, the regularity of distribution, Transport And Transformation and its influence to health are gradually valued by people, and its exhausting control is compeled
In the eyebrows and eyelashes.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of stationary source VOC on-line monitoring systems, the system
Applied to the real-time monitoring to various industrial pollution source emission organic matters, can with continuous monitoring methane, NMHC, total hydrocarbon,
The relevant parameters such as flue-gas temperature, pressure, flow velocity, and emission index, total emission volumn etc. are counted, the data measured are effectively managed
Reason.
The technical problems to be solved by the invention are realized using following technical scheme：
A kind of stationary source VOC on-line monitoring systems, including VOC monitoring subsystems, Gas Parameters monitoring subsystem, number
According to collection and processing subsystem, particle monitoring subsystem and blowback subsystem,
The VOC monitoring subsystems include the sampling probe being located in chimney, and the heat tracing pipe being connected with sampling probe
Line, and the pretreatment unit in the middle of heat traced pipeline, and the VOC analyzers being connected with heat traced pipeline are located at, and divide with VOC
The ECU and Zero gas generator of analyzer connection；
The Gas Parameters monitoring subsystem includes being provided with the temperature and pressure stream monitoring case being located in chimney, temperature and pressure stream monitoring case
Temperature monitoring, pressure monitor, flow monitor and moisture monitors；
The data acquisition and procession subsystem includes the line concentrating case being arranged on outdoor platform, and is connected with line concentrating case
Industrial computer, and the system monitoring software in industrial computer, the line concentrating case is connected with the temperature and pressure stream monitoring case, uses
In temperature, pressure, flow velocity and the moisture signal of collection flue gas；
The particle monitoring subsystem includes the electric unit and optical unit of interaction；
The blowback subsystem includes being provided with what is connected with extraneous source of the gas in the blowback case being connected with sampling probe, blowback case
Pressure regulator valve, and the air accumulator being connected with pressure regulator valve, it is gentle provided with outer back-flushing valve, interior back-flushing valve between air accumulator and sampling probe
Dynamic valve.
Further improvement is that, the pretreatment unit is dust removal filter.
Further improvement is that, the VOC analyzers are connected with gas tank and zero gas tank.
Further improvement is that, the temperature monitoring is platinum resistance temperature sensor.
Further improvement is that, the pressure monitor is isolation membrane pressure sensor.
Further improvement is that, the flow monitor is differential pressure transmitter.
Further improvement is that, the moisture monitors are humidity transmitter.
Further improvement is that, the electric unit includes the laser emitting module, Optical Receivers, center of interaction
Processing module, interface module.
Further improvement is that, the optical unit is made up of the light source, dust-break eyeglass and lens being arranged in order.
The beneficial effects of the invention are as follows：The system set VOC monitoring subsystems, Gas Parameters monitoring subsystem, data
Collection and processing subsystem, particle monitoring subsystem and blowback subsystem, applied to organic to various industrial pollution source emissions
The real-time monitoring of thing, can with relevant parameters such as continuous monitoring methane, NMHC, total hydrocarbon, flue-gas temperature, pressure, flow velocitys, and
Emission index, total emission volumn etc. are counted, the data measured are effectively managed.Meanwhile, possess automatic blowing function, can be automatic
Remove the dust of cartridge surface, prolonging service life of filter elements；And automatic calibration function, without on duty, dimension is reduced to greatest extent
Shield amount.
Brief description of the drawings
Fig. 1 is system construction drawing of the invention；
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
As shown in figure 1, a kind of stationary source VOC on-line monitoring systems, including VOC monitoring subsystems, Gas Parameters prison
Survey subsystem, data acquisition and procession subsystem, particle monitoring subsystem and blowback subsystem.Make introductions all round below：
VOC monitoring subsystems therein include the sampling probe being located in chimney, and the heat tracing being connected with sampling probe
Pipeline, and it is located at the pretreatment unit in the middle of heat traced pipeline, and the VOC analyzers being connected with heat traced pipeline, and and VOC
The ECU and Zero gas generator of analyzer connection.Sampling probe extracts adopting for overall height temperature in sampling process using complete
Sample loading mode, pops one's head in and the appropriate location of pipeline (or chimney) is arranged on according to national regulation, adopted by the heat traced pipeline of customized lengths
Collect the gas in pipeline (or chimney), heat traced pipeline temperature heat tracing carries out entering VOC analyzers after dedusting to more than 120 DEG C
Middle analysis gas componant.Analysis primary flow path is uninterruptedly sampled by jet pump, it is ensured that sample gas is in the state of real-time update, effectively carries
High system response time.The use GC-118 chromatographs of VOC analyzers preferably, using high temperature heat tracing twin columns blowback chromatogram in parallel
Isolation technics, can be obtained with automatic measurement and the content of analysis methane and total hydrocarbon by the mathematic interpolation of total hydrocarbon and methane content
The content of NMHC, substantially reduces analytical cycle, while the high temperature heat tracing skill developed for higher boiling NMHC
Art drastically reduce the area the chromatogram peak stretching of higher boiling NMHC, it is allowed to which the non-methane that instrument is carried out to high boiling substance is total
Hydrocarbon is accurately measured, or even can also carry out in the presence of high concentration NMHC the operation.
VOC monitoring subsystems are operationally, main to include sampling, note sample and analysis, the several steps of blowback.Two built in instrument
Sampling configuration is planted, stationary source waste gas and instrument calibration is respectively used to, both of which is determined volume using quantitative loop progress and adopted
Sample, sampling terminate after and atmospheric equilibrium.When measuring stationary source waste gas, instrument rinses fixed using high-temperature pump as sampling power
Amount ring simultaneously carries out determining volume acquisition.When instrument carries out zero gas or gas calibration, using malleation gas or zero gas flushing quantitative loop simultaneously
Volume sampling is determined in progress.The analysis of instrument total hydrocarbon uses void column, and methane uses 1m chromatographic column, utilizes methane and NMHC
Boiling point difference is separated.Once detecting methane peak, the direction for flowing through the carrier gas of chromatographic column has been reversed, and sample air circuit is turned
Change to outside carrier gas, return to sampling system.After the carrier gas changed course of chromatographic column, NMHC is gone out outside chromatographic column by blowback,
Without being detected.By the response difference of total hydrocarbon and methane, a signal proportional to all NMHC concentration is produced,
By the way that compared with the signal that known standard is produced, the signal is converted into concentration value.
Gas Parameters monitoring subsystem therein includes setting in the temperature and pressure stream monitoring case being located in chimney, temperature and pressure stream monitoring case
There are temperature monitoring, pressure monitor, flow monitor and moisture monitors.Gas Parameters monitoring subsystem includes flue gas temperature
Degree, pressure, the measurement of flow velocity and humidity.It is preferred that, flue-gas temperature is measured using platinum resistance temperature sensor；The pressure of flue gas is adopted
Measured with using high accuracy isolation membrane pressure sensor；Flue gas flow rate is measured using differential pressure transmitter, by measuring flow of flue gas
In total head and static pressure, obtain the flow velocity of flue gas.Using high-accuracy temperature-humidity transmitter special VOCS, (humidity becomes smoke moisture
Send device) measurement.
Data acquisition and procession subsystem includes the line concentrating case being arranged on outdoor platform, and the work being connected with line concentrating case
Control machine, and the system monitoring software (GC-118 system monitorings software) in industrial computer, line concentrating case are monitored with temperature and pressure stream
Case is connected, temperature, pressure, flow velocity and moisture signal for gathering flue gas.Line concentrating case is installed on platform out of doors, and collection is existing
4~20mA signals (signal such as flue-gas temperature/pressure/flow rate/humidity) of field platform device, pass through internal processing unit and change
Communicated for the RS-485 signals of industry spot with the industrial computer in rack.GC-118 system monitorings software installation and industrial computer
It is interior, all gas concentration information and work state information for monitoring and collecting, while generating form, data storage, record
The function such as historical data and environmental administration's connected network communication.Transmission unit is installed on interior of equipment cabinet, by the Parameter Switch of measurement into 4
~20mA signals give the DCS system of client.
Particle monitoring subsystem therein includes the electric unit and optical unit of interaction.It is preferred that, it is electrically single
Member uses Digital Signal Processing, is divided into laser emitting module, Optical Receivers, central processing module, interface module four big
Part, with advanced microprocessor and Embedded Software Control System, it is adaptive that realization includes luminous power adaptive stabilizing, Larger Dynamic
The mutually function such as amplification, extremely low null offset design, anti-adverse environment should be locked to arrange there is provided quick, the reliable and accurate flue dust that quantifies
Put data；Optical unit is main by light source Po, dust-break eyeglass G, lens L composition.
Exploring laser light source power output is Po, flue dust is irradiated after dust-break window lens decay K1, if flue dust is equivalent
Scattering coefficient is K2 (institutional framework, concentration to flue dust are related), and the power of flue dust reflection is Po × K1 × K2 × D, through window
Power after mouth mirror piece G is Po × K1 × K2 × D × K1, the power P r after being focused on through lens L for Po × K1 × K2 × D × K1 ×
K3.Po：Exploring laser light source power output, is directly proportional (coefficient k) to driving voltage Vt；
D：Air flue soot dust concentration；
K1：Dust-break piece is decayed, and is influenceed by laying dust；
K2：Flue dust reflectance factor, it is relevant with the structure particles that flue dust is constituted；
K3：Lens convergence gain, it is believed that be constant；
The signal voltage that LSS is received：Pr=Po × K1 × K2 × D × K1 × K3.
If Po, K1, K3 are constant, Pr is directly proportional to K2 × D, after equipment is installed, and it is corresponding with D to obtain Pr by demarcation
Relation, you can calculate dust concentration value：
D=A/K2 × Pr.It is assumed that A=1/ (Po × K1 × K1 × K3)
Blowback subsystem therein includes being provided with the blowback case being connected with sampling probe, blowback case to be connected with extraneous source of the gas
Pressure regulator valve, and the air accumulator being connected with pressure regulator valve, between air accumulator and sampling probe provided with outer back-flushing valve, interior back-flushing valve and
Pneumatic operated valve.When Pitot tube in GC-118 system units such as sampling probe, temperature and pressure stream monitoring case and smoke contacts there is provided blowback
Subsystem is to prevent smoke pollution system equipment part.Sampling probe and Pitot tube differential pressure flowmeter use (0.4~0.7) MPa
Compressed air carry out pulsed blowback.The blowing function automatic back blow cycle can set.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the present invention is not limited to the above embodiments, the original for simply illustrating the present invention described in above-described embodiment and specification
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (9)
1. a kind of stationary source VOC on-line monitoring systems, it is characterised in that：Monitored including VOC monitoring subsystems, Gas Parameters
Subsystem, data acquisition and procession subsystem, particle monitoring subsystem and blowback subsystem,
The VOC monitoring subsystems include the sampling probe being located in chimney, and the heat traced pipeline being connected with sampling probe, with
And be located at the pretreatment unit in the middle of heat traced pipeline, and the VOC analyzers being connected with heat traced pipeline, and with VOC analyzers
The ECU and Zero gas generator of connection；
The Gas Parameters monitoring subsystem includes being provided with temperature in the temperature and pressure stream monitoring case being located in chimney, temperature and pressure stream monitoring case
Monitor, pressure monitor, flow monitor and moisture monitors；
The data acquisition and procession subsystem includes the line concentrating case being arranged on outdoor platform, and the work being connected with line concentrating case
Control machine, and the system monitoring software in industrial computer, the line concentrating case is connected with the temperature and pressure stream monitoring case, for adopting
Collect temperature, pressure, flow velocity and the moisture signal of flue gas；
The particle monitoring subsystem includes the electric unit and optical unit of interaction；
The blowback subsystem is included in the blowback case being connected with sampling probe, blowback case provided with the pressure regulation connected with extraneous source of the gas
Valve, and the air accumulator being connected with pressure regulator valve, provided with outer back-flushing valve, interior back-flushing valve and pneumatic between air accumulator and sampling probe
Valve.
2. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The pretreatment
Unit is dust removal filter.
3. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The VOC analyses
Instrument is connected with gas tank and zero gas tank.
4. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The temperature prison
Survey device is platinum resistance temperature sensor.
5. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The pressure prison
It is isolation membrane pressure sensor to survey device.
6. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The flow velocity prison
Survey device is differential pressure transmitter.
7. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The humidity prison
Survey device is humidity transmitter.
8. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The electric list
Laser emitting module of the member including interaction, Optical Receivers, central processing module, interface module.
9. a kind of stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The optics list
Member is made up of the light source, dust-break eyeglass and lens that are arranged in order.
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| CN201710457534.0A CN107132318B (en) | 2017-06-16 | 2017-06-16 | Fixed pollution source VOC on-line monitoring system |
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| CN201710457534.0A CN107132318B (en) | 2017-06-16 | 2017-06-16 | Fixed pollution source VOC on-line monitoring system |
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| CN107132318B CN107132318B (en) | 2023-06-13 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748214A (en) * | 2017-11-20 | 2018-03-02 | 华电智控（北京）技术有限公司 | The pretreatment of volatile organic matter and analysis system |
| CN108213022A (en) * | 2018-01-17 | 2018-06-29 | 南开大学 | Optical window automatic blowout device in a kind of flue gas monitoring pipeline |
| CN108872450A (en) * | 2018-09-21 | 2018-11-23 | 江苏淳业仪表科技有限公司 | A kind of pollution sources VOCs on-Line Monitor Device |
| CN108872434A (en) * | 2018-07-13 | 2018-11-23 | 江西天意环保工程有限公司 | A kind of volatile organic matter on-line monitoring system |
| CN109142639A (en) * | 2018-09-17 | 2019-01-04 | 佛山市中环环保技术研究中心 | VOCs on-line monitoring system and method |
| CN109283277A (en) * | 2018-11-28 | 2019-01-29 | 南京霍普斯科技有限公司 | A kind of RTO device VOCs treatment efficiency on-line monitoring system and method |
| CN109917082A (en) * | 2019-04-22 | 2019-06-21 | 北京金隅红树林环保技术有限责任公司 | Extraction stain gas on-line monitoring system and method during a kind of soil remediation |
| CN110646253A (en) * | 2019-10-12 | 2020-01-03 | 东北大学 | Comprehensive sampler for atmospheric particulate matters and VOCs |
| CN111505188A (en) * | 2020-03-20 | 2020-08-07 | 合肥固泰自动化有限公司 | Volatile organic compounds VOCs multichannel on-line monitoring system |
| CN112033769A (en) * | 2020-08-26 | 2020-12-04 | 福建碧霞环保科技有限公司 | Pollution online monitoring and tracing system based on artificial intelligence and use method thereof |
| CN112485071A (en) * | 2020-11-18 | 2021-03-12 | 浙江哈米尔顿环保科技有限公司 | VOCs volatile organic compounds on-line monitoring system |
| CN112630361A (en) * | 2020-11-16 | 2021-04-09 | 广西微科环保科技有限公司 | Volatile organic compound on-line monitoring system |
| CN112945887A (en) * | 2021-03-11 | 2021-06-11 | 西安交通大学 | Flue gas in-situ monitoring system and method |
| CN113694684A (en) * | 2021-08-09 | 2021-11-26 | 中化(浙江)膜产业发展有限公司 | Contaminated gas treatment system, contaminated gas treatment method, electronic device, and storage medium |
| CN113791133A (en) * | 2021-09-15 | 2021-12-14 | 上海朋环测控技术股份有限公司 | Direct measurement method and detection system for non-methane total hydrocarbons |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748214A (en) * | 2017-11-20 | 2018-03-02 | 华电智控（北京）技术有限公司 | The pretreatment of volatile organic matter and analysis system |
| CN108213022A (en) * | 2018-01-17 | 2018-06-29 | 南开大学 | Optical window automatic blowout device in a kind of flue gas monitoring pipeline |
| CN108872434A (en) * | 2018-07-13 | 2018-11-23 | 江西天意环保工程有限公司 | A kind of volatile organic matter on-line monitoring system |
| CN109142639A (en) * | 2018-09-17 | 2019-01-04 | 佛山市中环环保技术研究中心 | VOCs on-line monitoring system and method |
| CN108872450A (en) * | 2018-09-21 | 2018-11-23 | 江苏淳业仪表科技有限公司 | A kind of pollution sources VOCs on-Line Monitor Device |
| CN109283277A (en) * | 2018-11-28 | 2019-01-29 | 南京霍普斯科技有限公司 | A kind of RTO device VOCs treatment efficiency on-line monitoring system and method |
| CN109917082A (en) * | 2019-04-22 | 2019-06-21 | 北京金隅红树林环保技术有限责任公司 | Extraction stain gas on-line monitoring system and method during a kind of soil remediation |
| CN110646253A (en) * | 2019-10-12 | 2020-01-03 | 东北大学 | Comprehensive sampler for atmospheric particulate matters and VOCs |
| CN111505188A (en) * | 2020-03-20 | 2020-08-07 | 合肥固泰自动化有限公司 | Volatile organic compounds VOCs multichannel on-line monitoring system |
| CN112033769A (en) * | 2020-08-26 | 2020-12-04 | 福建碧霞环保科技有限公司 | Pollution online monitoring and tracing system based on artificial intelligence and use method thereof |
| CN112033769B (en) * | 2020-08-26 | 2022-05-03 | 福建碧霞环保科技有限公司 | Pollution online monitoring and tracing system based on artificial intelligence and use method thereof |
| CN112630361A (en) * | 2020-11-16 | 2021-04-09 | 广西微科环保科技有限公司 | Volatile organic compound on-line monitoring system |
| CN112485071A (en) * | 2020-11-18 | 2021-03-12 | 浙江哈米尔顿环保科技有限公司 | VOCs volatile organic compounds on-line monitoring system |
| CN112945887A (en) * | 2021-03-11 | 2021-06-11 | 西安交通大学 | Flue gas in-situ monitoring system and method |
| CN112945887B (en) * | 2021-03-11 | 2023-12-19 | 西安交通大学 | Flue gas in-situ monitoring system and method |
| CN113694684A (en) * | 2021-08-09 | 2021-11-26 | 中化(浙江)膜产业发展有限公司 | Contaminated gas treatment system, contaminated gas treatment method, electronic device, and storage medium |
| CN113791133A (en) * | 2021-09-15 | 2021-12-14 | 上海朋环测控技术股份有限公司 | Direct measurement method and detection system for non-methane total hydrocarbons |
| CN113791133B (en) * | 2021-09-15 | 2024-03-22 | 上海朋环测控技术股份有限公司 | Direct measurement method and detection system for non-methane total hydrocarbons |
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