CN105675356A - Flue gas asymmetric sampling device - Google Patents
Flue gas asymmetric sampling device Download PDFInfo
- Publication number
- CN105675356A CN105675356A CN201610161989.3A CN201610161989A CN105675356A CN 105675356 A CN105675356 A CN 105675356A CN 201610161989 A CN201610161989 A CN 201610161989A CN 105675356 A CN105675356 A CN 105675356A
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- CN
- China
- Prior art keywords
- sampling
- flue gas
- flue
- asymmetric
- charge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- G01N1/24—Suction devices
Abstract
The invention discloses a flue gas asymmetric sampling device and relates to the technical field of boilers. Gas asymmetric sampling key technology is adopted, the flue gas asymmetric sampling device is composed of a flue, a sampling manifold, sampling branched pipes and sampling holes, the sampling manifold is fixedly connected with the sampling branched pipes, the sampling holes are formed in the sampling branched pipes, and the sampling branched pipes are inserted into the flue and fixedly connected with a flue wall. The flue gas asymmetric sampling device is used for flue gas sampling and is simple and ingenious in structure, stable and reliable in effect, easy to manufacture and low in cost.
Description
Technical field
The asymmetric sampler of flue gas of the present invention, relates to boiler technology field; It is specifically related to the asymmetric sampler technical field of boiler back end ductwork flue gas.
Background technology
Along with the progress of society, the requirement of environmental protection is increasingly strict. The technical monitoring that thermal power plant is discharged flue gas requires also strict all the more. Gas Parameters monitoring system is mainly used to measure flue gas flow rate, flue-gas temperature, flue gas pressures, flue gas oxygen content, smoke moisture etc., for the conversion of the calculating of total emission volumn and related concentrations. Tobacco damping-off is developed into plug-in type scattered infrared light backward or laser dust gauge and front scattering, sidescattering, electricity dust gauge etc. by across flue opacity dust gauge, beta-ray dust measuring instrument. Difference according to sampling mode, CEMS can be divided mainly into direct measurement, extraction-type is measured and 3 kinds of technology of remote sensing survey. Wherein with removable most widely used, and extraction-type is generally divided into single-point sampling method, multiple spot (3 points) sampling method. Specific to thermal power plant, due to thermal power plant arrange according to respective in-plant equipment, site condition carries out desulphurization denitration design, causes that desulphurization denitration flue is various informative, flow field is complicated; It is difficult to the data with the sampling of any or multiple spot (3 points) obtains and represents the flue gas characteristic in whole flow field. So, many deficiencies, defect and drawback that the existing known technology of flue gas sampling and present situation also exist are apparent from. Professional knowledge and working experience and the unremitting pursuit to cause based on inventor, on conscientiously investigation, analysis, understanding, summary, the existing known technology of research and present situation basis, spy takes " the asymmetric sampling of flue gas " key technology, has succeeded in developing " the asymmetric sampler of flue gas " new equipment. The present invention utilizes computer simulation flow field condition, sets up sampling sites mathematical model of flow field. Then according to simulation result of calculation, arranging probe tube in sampling cross section according to velocity flow profile gradient, probe tube has thief hole, the perforate density of thief hole changes according to current gradient change, the region more thief hole of layout that flow velocity is fast, less thief hole is arranged in the slow region of flow velocity. Each flow field characteristic arda sampling amount is allowed to be directly proportional to flow field characteristic flow velocity. After sampling, by the gross sample flue gas that house steward collects, being sufficiently mixed in blender, CEMS samples in blender and is analyzed. Rich sampling flue gas sends flue back to again by flue pressure reduction or sampling pump, stops direct discharge. This technology can according to flow field characteristic, and the multiple spot of residual quantity extracts the flue gas of same cross section different parts, enables the flue gas extracted truly comprehensively to react the ingredient properties of flue gas in this flow field. Adopt the thermal power generation station-service outlet NO of SCR denitration technologyXConcentration adjusts reducing agent quantity delivered.Therefore NO is measured reallyXConcentration, directly influences the quantity delivered of reducing agent. The quantity delivered of reducing agent due to the denitration in current most of thermal power plants, it is dependent on that DCS automatically sets feeding coal, DCS system is set according to outlet pollutant levels conversion and adjusts, therefore, measure outlet pollutant levels truly, timely to be just particularly important. Conventional CEMS sampling probe is in order to reduce system delay, and the change of reflection pollutant levels, is often arranged in reactor outlet in time. But if this position flue is complex-shaped, elbow and concentric reducer more, then very easily form turbulent flow in flue, single-point or the sampling of multiple spot (3 points) method all can not meet reflection flue gas pollutant characteristic comprehensively. The technology of the present invention adopts computer modeling technique, first sets up flow field model according to flue situation; Again according to Modeling Calculation result, arrange dozens of sampling probe targetedly; After the flue gas extracted is sufficiently mixed in blender, transfer to CEMS instrument to measure again, effectively raise accuracy and the representativeness of analysis. The present invention succeeds in developing, and effectively solves deficiency, defect and drawback that existing known technology exists with present situation.
Summary of the invention
The present invention takes " the asymmetric sampling of flue gas " key technology, by flue, sampling house steward, sampling is in charge of, thief hole is constituted, its sampling house steward is in charge of fixing connection with sampling, and it samples to be in charge of and is provided with thief hole, and its sampling is in charge of to be inserted in flue and fix with walling of flue and is connected.
The purpose reached by the present invention is: 1., the present invention take " the asymmetric sampling of flue gas " key technology, it is provided that " the asymmetric sampler of flue gas " new equipment. 2., the present invention takes " the asymmetric sampling of flue gas " key technology, arrange dozens of sampling probe targetedly, after the flue gas extracted is sufficiently mixed in blender, transfer to CEMS instrument to measure again, effectively raise accuracy and the representativeness of analysis. 3., the present invention adopt computer modeling technique, first set up flow field model according to flue situation, there is science, advance, accuracy, representativeness, practicality. 4., the present invention scientific and reasonable for structure and simply ingenious, convenient uses and effect stability be reliable, easy to make with use and cost of manufacture and operation cost all low. 5., the invention solves deficiency, defect and drawback that existing known technology exists with present situation. 6., the succeeding in developing of the present invention, effectively brought up to the technical merit of the industry, can wide popularization and application.
For achieving the above object, technical scheme provided by the invention is:
A kind of asymmetric sampler of flue gas, by flue, sampling house steward, sampling is in charge of, thief hole is constituted;
The asymmetric sampler of described flue gas, its sampling house steward is in charge of fixing connection with sampling, and it samples to be in charge of and is provided with thief hole, and its sampling is in charge of to be inserted in flue and fix with walling of flue and is connected.
The asymmetric sampler of described flue gas, described flue, sampling house steward, sampling are in charge of and are tubular structure, and described thief hole is circular port.
The asymmetric sampler of described flue gas, it is four that described sampling is in charge of minimum.
The asymmetric sampler of described flue gas, described sampling is in charge of for unsymmetrical arrangement, and described thief hole is unsymmetrical arrangement.
The asymmetric sampler of described flue gas, described thief hole is the one that circular port selects to replace with in slotted eye, polygonal hole.
Operation principle and the work process of the present invention be: as shown in Figure of description, the operation principle of the present invention and work process are extremely simple clear, the present invention has given full play to the effect of " the asymmetric sampling of flue gas " key technology, its sampling house steward is in charge of fixing connection with sampling, sampling to be in charge of and be provided with thief hole, sampling is in charge of to be inserted in flue and fix with walling of flue and is connected. Have science, advance, accuracy, representativeness, practicality flue gas be removed after, by sample house steward collect and deliver to blender mixing after carry out again detecting just can, namely extract in blender necessary amount flue gas hand over CEMS be analyzed. Flue gas unnecessary in blender sends back to flue again by flue pressure reduction or sampling pump, stops direct discharge. It is extremely easy to use. The design science of the present invention is rationally, simple and ingenious structure, to be prone to cost of manufacture low, and result of use is reliable and stable, long service life, solves deficiency, defect and drawback that existing known technology exists with present situation, has effectively brought up to the technical merit of the industry.
Owing to have employed technical scheme provided by the present invention; Owing to this invention takes " the asymmetric sampling of flue gas " key technology; Described in the operation principle of the present invention and work process; Due to the present invention by flue, sampling house steward, sampling is in charge of, thief hole is constituted, its sampling house steward is in charge of fixing connection with sampling, and it samples to be in charge of and is provided with thief hole, and it samples to be in charge of to be inserted in flue and fix with walling of flue and is connected. Make the present invention with existing known technology compared with present situation, it is thus achieved that to provide the benefit that:
1, this invention takes " the asymmetric sampling of flue gas " key technology, thus providing " the asymmetric sampler of flue gas " new equipment.
2, the present invention takes " the asymmetric sampling of flue gas " key technology, arrange dozens of sampling probe targetedly, after the flue gas extracted is sufficiently mixed in blender, transfer to CEMS instrument to measure again, effectively raise accuracy and the representativeness of analysis.
3, the present invention adopts computer modeling technique, first sets up flow field model according to flue situation, has science, advance, accuracy, representativeness, practicality.
4, the present invention scientific and reasonable for structure and simply ingenious, convenient uses and effect stability be reliable, easy to make with use and cost of manufacture and operation cost all low.
5, the invention solves deficiency, defect and drawback that existing known technology exists with present situation.
6, the succeeding in developing of the present invention, has effectively brought up to the technical merit of the industry, can wide popularization and application.
Accompanying drawing explanation
Figure of description is the schematic diagram of the specific embodiment of the invention. What the flue 1 in figure represented is flue cross section.
Label in figure: 1, flue, 2, sampling house steward, 3, sampling be in charge of, 4, thief hole.
Detailed description of the invention
Below in conjunction with Figure of description, the present invention is described in detail. Shown in Figure of description:
A kind of asymmetric sampler of flue gas, is in charge of 3, thief hole 4 is constituted by flue 1, sampling house steward 2, sampling;
The asymmetric sampler of described flue gas, its sampling house steward 2 is in charge of 3 and fixing is connected with sampling, and its sampling is in charge of on 3 and is provided with thief hole 4, and it samples is in charge of 3 and is inserted in flue 1 and fixes with walling of flue and be connected.
The asymmetric sampler of described flue gas, described flue 1, sampling house steward 2, sampling are in charge of 3 and are tubular structure, and described thief hole 4 is circular port.
The asymmetric sampler of described flue gas, described sampling be in charge of 3 minimum be four.
The asymmetric sampler of described flue gas, described sampling is in charge of 3 for unsymmetrical arrangement, and described thief hole 4 is unsymmetrical arrangement.
The asymmetric sampler of described flue gas, described thief hole 4 selects the one replacing with in slotted eye, polygonal hole for circular port.
In above-mentioned specific implementation process: described sampling is in charge of 3 and is carried out with four, five, six, seven, eight, nine respectively; Described thief hole 4 is carried out with circular port, slotted eye, polygonal hole respectively; All obtain intended good result.
The foregoing is only presently preferred embodiments of the present invention, not the present invention is done any pro forma restriction; The those of ordinary skill of all industry, all can shown in by specification accompanying drawing and the above and implement the present invention swimmingly; But make the equivalent variations of differentiation without departing from technical solution of the present invention, be the Equivalent embodiments of the present invention, all still fall within the technical scheme of present invention protection.
Claims (5)
1. the asymmetric sampler of flue gas, it is characterised in that: by flue (1), sampling house steward (2), (3) are in charge of in sampling, thief hole (4) is constituted;
The asymmetric sampler of described flue gas, its sampling house steward (2) is in charge of with sampling that (3) are fixing to be connected, and its sampling is in charge of on (3) and is provided with thief hole (4), and its sampling is in charge of (3) and is inserted in flue (1) and fixes with walling of flue and be connected.
2. the asymmetric sampler of flue gas according to claim 1, it is characterised in that: described flue (1), sampling house steward (2), sampling are in charge of (3) and are tubular structure, and described thief hole (4) is circular port.
3. the asymmetric sampler of flue gas according to claim 1, it is characterised in that: it is four that described sampling is in charge of (3) minimum.
4. the asymmetric sampler of flue gas according to claim 1, it is characterised in that: described sampling is in charge of (3) for unsymmetrical arrangement, and described thief hole (4) is unsymmetrical arrangement.
5. the asymmetric sampler of flue gas according to claim 2, it is characterised in that: described thief hole (4) selects the one replacing with in slotted eye, polygonal hole for circular port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610161989.3A CN105675356A (en) | 2016-03-22 | 2016-03-22 | Flue gas asymmetric sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610161989.3A CN105675356A (en) | 2016-03-22 | 2016-03-22 | Flue gas asymmetric sampling device |
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| Publication Number | Publication Date |
|---|---|
| CN105675356A true CN105675356A (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610161989.3A Pending CN105675356A (en) | 2016-03-22 | 2016-03-22 | Flue gas asymmetric sampling device |
Country Status (1)
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| CN (1) | CN105675356A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141943A (en) * | 1984-08-03 | 1986-02-28 | Ube Kagaku Kogyo Kk | Gas sampling device for dust or gas containing much dust and vapor |
| CN204882168U (en) * | 2015-08-10 | 2015-12-16 | 庞灿 | Large -sized boiler flue net sampling device |
| CN205426597U (en) * | 2016-03-22 | 2016-08-03 | 湖南大唐节能科技有限公司 | Asymmetric sampling device of flue flue gas |
-
2016
- 2016-03-22 CN CN201610161989.3A patent/CN105675356A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6141943A (en) * | 1984-08-03 | 1986-02-28 | Ube Kagaku Kogyo Kk | Gas sampling device for dust or gas containing much dust and vapor |
| CN204882168U (en) * | 2015-08-10 | 2015-12-16 | 庞灿 | Large -sized boiler flue net sampling device |
| CN205426597U (en) * | 2016-03-22 | 2016-08-03 | 湖南大唐节能科技有限公司 | Asymmetric sampling device of flue flue gas |
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Application publication date: 20160615 |
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