CN104422602B - Isokinetic sampling's method that stationary source is unpowered - Google Patents

Isokinetic sampling's method that stationary source is unpowered Download PDF

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Publication number
CN104422602B
CN104422602B CN201310365936.XA CN201310365936A CN104422602B CN 104422602 B CN104422602 B CN 104422602B CN 201310365936 A CN201310365936 A CN 201310365936A CN 104422602 B CN104422602 B CN 104422602B
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return
flow
wen
stationary source
dust
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CN104422602A (en
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郭强
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Shanghai Baosteel Industry Technological Service Co Ltd
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Shanghai Baosteel Industry Technological Service Co Ltd
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Abstract

The invention discloses a kind of unpowered isokinetic sampling's methods of stationary source, i.e. this method utilizes the front and back air-flow differential in Concentration in Fixed Pollutants Source pipeline, return is set in exhaust pipe peripheral hardware, the first coaxial valve is successively installed to outflow end from inflow end on return, Wen's intelligent flow meter, dust catching pipe, second coaxial valve, the simulation of computer fluid emulation is carried out to return in advance, differential pressure and the flow speed value of loop conduit system are obtained to determine the throat diameter of gas flow range and Wen's intelligent flow meter, the adjusting of automated intelligent flow is carried out to gas in return using Wen's intelligent flow meter, the isokinetic sampling of stationary source is realized by the Dust Capacity that the filter cylinder in dust catching pipe adsorbs.This method is not necessarily to provide the acquisition that power realizes stationary source dust, overcomes the defect of conventional monitoring methods, easy to operate, easy to maintain, avoids security risk, effectively increases monitoring accuracy.

Description

Isokinetic sampling's method that stationary source is unpowered
Technical field
The present invention relates to a kind of unpowered isokinetic sampling's methods of stationary source.
Background technique
Currently, the dust content measurement in stationary source mostly uses monitor and monitor on-line two kinds of methods by hand greatly, Gu Pollution sources dust on-line monitoring is determined because measuring using optical principle, to using object to have harsh requirement, by uncertain factor Interference is big, working service is at high cost, calibration difficulty is big, therefore is not suitable with and is widely applied utilization in production scene;Prison by hand It surveys and is then measured using predicted velocity method, pressure balance method, be the most common measuring method of stationary source dust content, but the survey Determine method there is sampling time it is long, cumbersome, high to operator's technical requirements the defects of, especially high-altitude work It is more due to carrying test equipment when industry, security risk is easily brought, and two methods of monitoring and on-line monitoring require to lead to by hand Electricity just can be carried out detection.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of unpowered isokinetic sampling's method of stationary source, this method The acquisition for realizing stationary source dust without providing power, overcomes the defect of conventional monitoring methods, easy to operate, maintenance It is convenient, security risk is avoided, monitoring accuracy is effectively increased.
In order to solve the above technical problems, the unpowered isokinetic sampling's method of stationary source of the present invention, utilizes stationary source Front and back air-flow differential in exhaust pipe sets return in exhaust pipe peripheral hardware, and return uses sealing reflux type simultaneously The airflow direction being parallel in exhaust pipe, on return from flow into end successively installed to outflow end the first coaxial valve, Wen's intelligent flow meter, dust catching pipe, the second coaxial valve carry out the simulation of computer fluid emulation to return in advance, Differential pressure and the flow speed value of loop conduit system are obtained to determine the throat diameter of gas flow range and Wen's intelligent flow meter, is adopted Automated intelligent flow adjusting is carried out to gas in return with Wen's intelligent flow meter, is inhaled by the filter cylinder in dust catching pipe Attached Dust Capacity realizes the isokinetic sampling of stationary source.
Further, above-mentioned computer fluid emulation be modeled as measuring in advance on return average dynamic pressure on section, Above-mentioned data are inputted computer fluid emulation system, select simulated conditions for loop pipe by static pressure, total pressure, temperature and flow speed value Road internal diameter and segment length parallel with exhaust pipe carry out fluid emulation simulation, obtain return speed cloud atlas, speed vector figure And return determines Wen's intelligent flow meter throat diameter and flow according to this analogue data into and out of end flow velocity and pressure value Range, to realize unpowered isokinetic sampling.
Further, the first coaxial valve and the second coaxial valve are closed, the filter cylinder in dust catching pipe is replaced, realizes and fixes Operation is varied in pollution source sampling.
Since the unpowered isokinetic sampling's method of stationary source of the present invention uses above-mentioned technical proposal, i.e. this method utilizes Front and back air-flow differential in Concentration in Fixed Pollutants Source pipeline sets return in exhaust pipe peripheral hardware, flows automatically on return Enter end and the first coaxial valve, Wen's intelligent flow meter, dust catching pipe, the second coaxial valve are successively installed to outflow end, in advance The simulation of computer fluid emulation is carried out to return, obtains differential pressure and the flow speed value of loop conduit system to determine gas flow The throat diameter of range and Wen's intelligent flow meter carries out automated intelligent to gas in return using Wen's intelligent flow meter Flow is adjusted, and the isokinetic sampling of stationary source is realized by the Dust Capacity that the filter cylinder in dust catching pipe adsorbs.This method without The acquisition that power realizes stationary source dust need to be provided, the defect of conventional monitoring methods, easy to operate, maintenance side are overcome Just, security risk is avoided, monitoring accuracy is effectively increased.
Detailed description of the invention
The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:
Fig. 1 is the schematic diagram of return in the unpowered isokinetic sampling's method of stationary source of the present invention.
Specific embodiment
As shown in Figure 1, the unpowered isokinetic sampling's method of stationary source of the present invention, utilizes Concentration in Fixed Pollutants Source pipeline 1 Interior front and back air-flow differential sets return 2 in 1 peripheral hardware of exhaust pipe, and return 2 is using sealing reflux type and is parallel to Airflow direction in exhaust pipe 1 successively installs the first coaxial valve 3, Wen to outflow end from inflow end on return 2 Intelligent flow meter 4, dust catching pipe 5, the second coaxial valve 6 carry out the simulation of computer fluid emulation to return 2 in advance, Differential pressure and the flow speed value of 2 system of return are obtained to determine the throat diameter of gas flow range and Wen's intelligent flow meter 4, The adjusting of automated intelligent flow is carried out to gas in return 2 using Wen's intelligent flow meter 4, by dust catching pipe 5 The Dust Capacity of filter cylinder absorption realizes the isokinetic sampling of stationary source.
Further, above-mentioned computer fluid emulation be modeled as measuring in advance on return 2 average dynamic pressure on section, Above-mentioned data are inputted computer fluid emulation system, select simulated conditions for loop pipe by static pressure, total pressure, temperature and flow speed value 2 internal diameter of road and segment length parallel with exhaust pipe 1 carry out fluid emulation simulation, obtain 2 speed cloud atlas of return, velocity vector Figure and return 2 into and out of end flow velocity and pressure value, according to this analogue data determine 4 throat diameter of Wen's intelligent flow meter and Range of flow, to realize unpowered isokinetic sampling.
Further, the first coaxial valve 3 and the second coaxial valve 6 are closed, the filter cylinder in dust catching pipe 5 is replaced, is realized Operation is varied in fixed-contamination source sampling.
This method establishes the unpowered isokinetic sampling of stationary source, is quickly surveyed to realize to pipeline dust concentration It is fixed, solve that conventional monitoring methods deposit it is cumbersome time-consuming, effective low, at high cost the problems such as, and it is the precision of this method, accurate Degree, operability all have clear improvement compared with conventional monitoring methods, change previous stationary source dust detection and need power The problem of device, improves monitoring efficiency and precision, avoids security risk.

Claims (2)

1. a kind of unpowered isokinetic sampling's method of stationary source, it is characterised in that:Using in Concentration in Fixed Pollutants Source pipeline Front and back air-flow differential sets return in exhaust pipe peripheral hardware, and return is using sealing reflux type and is parallel to exhaust pipe Airflow direction in road successively installs the first coaxial valve, Wen's intelligent flow to outflow end from inflow end on return Meter, dust catching pipe, the second coaxial valve carry out the simulation of computer fluid emulation to return in advance, obtain return The differential pressure of system and flow speed value are to determine the throat diameter of gas flow range and Wen's intelligent flow meter, using Wen's intelligence flow Meter carries out the adjusting of automated intelligent flow to gas in return, and the Dust Capacity adsorbed by the filter cylinder in dust catching pipe is real The isokinetic sampling of existing stationary source, the computer fluid emulation are modeled as measuring in advance on return flat on section Above-mentioned data are inputted computer fluid emulation system by equal dynamic pressure, static pressure, total pressure, temperature and flow speed value, select simulated conditions for Return internal diameter and segment length parallel with exhaust pipe carry out fluid emulation simulation, obtain return speed cloud atlas, speed Polar plot and return determine Wen's intelligent flow meter throat diameter according to this analogue data into and out of end flow velocity and pressure value And range of flow, to realize unpowered isokinetic sampling.
2. the unpowered isokinetic sampling's method of stationary source according to claim 1, it is characterised in that:It is coaxial to close first Valve and the second coaxial valve replace the filter cylinder in dust catching pipe, and that realizes fixed-contamination source sampling varies operation.
CN201310365936.XA 2013-08-21 2013-08-21 Isokinetic sampling's method that stationary source is unpowered Active CN104422602B (en)

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CN104422602B true CN104422602B (en) 2018-11-23

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CN107285038A (en) * 2017-06-30 2017-10-24 中铁九局集团工程检测试验有限公司 Blending station filler bin sampler
CN108760830A (en) * 2018-03-20 2018-11-06 安徽航途智能科技有限公司 A kind of active air admission type bus inflammable gas detection device and working method

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1945233A (en) * 2006-09-30 2007-04-11 浙江麦姆龙仪表有限公司 Measuring method and its device for external screw sampling of pipeline gas flow
CN101038296A (en) * 2007-04-03 2007-09-19 高明逊 Non-blocking primary air speed measuring device
CN100548439C (en) * 2003-10-03 2009-10-14 沙特阿拉伯石油公司 The method and apparatus that is used for the element sulphur of gas in the measurement gas pipeline

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326342B2 (en) * 1982-01-30 1991-04-10 Nikkiso Co Ltd
JPH0868734A (en) * 1994-08-31 1996-03-12 Ngk Insulators Ltd Probe tube for sampling gas

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100548439C (en) * 2003-10-03 2009-10-14 沙特阿拉伯石油公司 The method and apparatus that is used for the element sulphur of gas in the measurement gas pipeline
CN1945233A (en) * 2006-09-30 2007-04-11 浙江麦姆龙仪表有限公司 Measuring method and its device for external screw sampling of pipeline gas flow
CN101038296A (en) * 2007-04-03 2007-09-19 高明逊 Non-blocking primary air speed measuring device

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Patentee after: Baowu equipment Intelligent Technology Co., Ltd

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Patentee before: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd.