CN206848240U - 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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- CN206848240U CN206848240U CN201720708426.1U CN201720708426U CN206848240U CN 206848240 U CN206848240 U CN 206848240U CN 201720708426 U CN201720708426 U CN 201720708426U CN 206848240 U CN206848240 U CN 206848240U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model 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
It the utility model is related to the monitoring technical field of pollution sources in flue gas, and in particular to a kind of stationary source VOC exists
Line monitoring 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) in the type organic in air.VOC complicated components, the VOC detected at present have
Kind more than 300, by the difference of its chemical constitution, alkanes, aromatic hydrocarbons, alkenes, halohydrocarbon, esters, aldehydes, ketone can be further divided into
Class and other compounds etc., it is generally existing and the complicated a kind of organic dirt of composition in air, water quality, soil and other deposits
Contaminate thing.Its toxicity, excitant, carcinogenesis affect 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.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of stationary source VOC on-line monitoring systems, is somebody's turn to do
System is applied to real-time monitoring to various industrial pollution source emission organic matters, can be with continuous monitoring methane, NMHC, total
The relevant parameters such as hydrocarbon, flue-gas temperature, pressure, flow velocity, and emission index, total emission volumn etc. are counted, have to the data measured
Effect management.
Technical problem to be solved in the utility model is 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 with 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 among heat traced pipeline is located at, and the VOC analyzers being connected with heat traced pipeline, and divide with VOC
The ECU and Zero gas generator of analyzer connection；
The Gas Parameters monitoring subsystem includes the temperature and pressure stream monitoring case being located in chimney, is provided with 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 be 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 the blowback case being connected with sampling probe, is provided with what is connected with extraneous source of the gas in blowback case
Pressure regulator valve, and the air accumulator being connected with pressure regulator valve, it is gentle that outer back-flushing valve, interior back-flushing valve are provided 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 utility model are：The system set VOC monitoring subsystems, Gas Parameters monitoring subsystems,
Data acquisition and procession subsystem, particle monitoring subsystem and blowback subsystem, applied to various industrial pollution source emissions
The real-time monitoring of organic matter, it can join so that continuous monitoring methane, NMHC, total hydrocarbon, flue-gas temperature, pressure, flow velocity etc. are related
Number, 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, to greatest extent
Reduce maintenance.
Brief description of the drawings
Fig. 1 is system construction drawing of the present utility model；
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and the utility model 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 the pretreatment unit among heat traced pipeline is located at, 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, pop 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 enters VOC analyzers to more than 120 DEG C after carrying out dedusting
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.VOC analyzers preferably use GC-118 chromatographs, using high temperature heat tracing twin columns parallel connection blowback chromatogram
Isolation technics, it 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, analytical cycle is substantially reduced, while for the high temperature heat tracing skill of higher boiling NMHC development
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 the operation can also be carried out in the presence of high concentration NMHC.
VOC monitoring subsystems are at work, main to include sampling, note sample and analysis, the several steps of blowback.Two built in instrument
Kind of sampling configuration, is respectively used to stationary source waste gas and instrument calibration, and both of which carries out determining volume adopting using quantitative loop
Sample, sampling terminate after and atmospheric equilibrium.When measuring stationary source waste gas, it is fixed that instrument rinses using high-temperature pump as sampling power
Amount ring simultaneously carries out determining volume acquisition.Instrument carries out zero gas or gas when calibrating, using malleation gas or zero gas flushing quantitative loop simultaneously
Carry out determining volume sampling.The analysis of instrument total hydrocarbon use void column, and methane utilizes methane and NMHC using 1m chromatographic column
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 signal caused by known standard, the signal is converted into concentration value.
Gas Parameters monitoring subsystem therein includes the temperature and pressure stream monitoring case being located in chimney, is set in 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
The measurement of degree, pressure, flow velocity and humidity.Preferably, 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 monitor with temperature and pressure stream
Case connects, for gathering temperature, pressure, flow velocity and the moisture signal of flue gas.On the platform of line concentrating case installation out of doors, collection is existing
4~20mA signals (signal such as flue-gas temperature/pressure/flow rate/humidity) of field platform device, the processing unit for passing through inside are changed
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, for monitoring and collecting all gas concentration information and work state information, while generate 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.Preferably, it is electrically single
Member uses Digital Signal Processing, and it is big to be divided into laser emitting module, Optical Receivers, central processing module, interface module four
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, there is provided quick, the reliable and accurate flue dust that quantifies is arranged
Put data；Optical unit is mainly 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, through lens L focusing after power P r for Po × K1 × K2 × D × K1 ×
K3.Po：Exploring laser light source power output, (coefficient k) directly proportional 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 of flue dust composition；
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, and after equipment installation, it is corresponding with D can 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 the blowback case being connected with sampling probe, is provided with blowback case and is connected with extraneous source of the gas
Pressure regulator valve, and the air accumulator being connected with pressure regulator valve, be provided between air accumulator and sampling probe 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.
General principle, principal character and advantage of the present utility model has been shown and described above.The technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model also has various change
And improvement, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model requires protection scope
By appended claims and its equivalent thereof.
Claims (9)
- A kind of 1. 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 among heat traced pipeline, and 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 the temperature and pressure stream monitoring case being located in chimney, and temperature is provided with 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 includes the blowback case being connected with sampling probe, and the pressure regulation connected with extraneous source of the gas is provided with blowback case Valve, and the air accumulator being connected with pressure regulator valve, outer back-flushing valve, interior back-flushing valve and pneumatic are provided between air accumulator and sampling probe Valve.
- A kind of 2. stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The pretreatment Unit is dust removal filter.
- A kind of 3. 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.
- A kind of 4. 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.
- A kind of 5. stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The pressure prison Device is surveyed as isolation membrane pressure sensor.
- A kind of 6. 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.
- A kind of 7. stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：The humidity prison Survey device is humidity transmitter.
- A kind of 8. stationary source VOC on-line monitoring systems according to claim 1, it is characterised in that：It is described electrically single Laser emitting module of the member including interaction, Optical Receivers, central processing module, interface module.
- A kind of 9. 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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| Application Number | Priority Date | Filing Date | Title |
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| CN201720708426.1U CN206848240U (en) | 2017-06-16 | 2017-06-16 | A kind of stationary source VOC on-line monitoring systems |
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| CN201720708426.1U CN206848240U (en) | 2017-06-16 | 2017-06-16 | A kind of stationary source VOC on-line monitoring systems |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132318A (en) * | 2017-06-16 | 2017-09-05 | 合肥固泰自动化有限公司 | A kind of stationary source VOC on-line monitoring systems |
| CN114324234A (en) * | 2021-11-23 | 2022-04-12 | 合肥固泰自动化有限公司 | In-situ extraction type laser ammonia escape analysis system |
-
2017
- 2017-06-16 CN CN201720708426.1U patent/CN206848240U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107132318A (en) * | 2017-06-16 | 2017-09-05 | 合肥固泰自动化有限公司 | A kind of stationary source VOC on-line monitoring systems |
| CN114324234A (en) * | 2021-11-23 | 2022-04-12 | 合肥固泰自动化有限公司 | In-situ extraction type laser ammonia escape analysis system |
| CN114324234B (en) * | 2021-11-23 | 2024-01-26 | 合肥固泰自动化有限公司 | In-situ extraction type laser ammonia escape analysis system |
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