CN105628453A - Novel smoke sampling device - Google Patents
Novel smoke sampling device Download PDFInfo
- Publication number
- CN105628453A CN105628453A CN201610071508.XA CN201610071508A CN105628453A CN 105628453 A CN105628453 A CN 105628453A CN 201610071508 A CN201610071508 A CN 201610071508A CN 105628453 A CN105628453 A CN 105628453A
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- Prior art keywords
- sampling
- flue gas
- female pipe
- arm
- novel
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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
Abstract
The invention relates to a novel smoke sampling device which comprises two sampling branched pipes phi D1 and a sampling manifold phi D2. The sampling branched pipes phi D1 are connected out from the sampling manifold phi D2 and arranged in the inner wall of a flue, and a row of sampling air suction holes are formed equidistantly in each sampling branched pipe phi D1. The novel smoke sampling device has the advantages that sampling is performed at multiple points, so that representativeness of smoke analysis is improved. The novel smoke sampling device is simple and high in reliability. A sampling mode is reasonable, ash blockage of an analysis device is avoided. The novel smoke sampling device is little in investment expense and free of unfavorable influence on a denitration system.
Description
Technical field
Patent of the present invention relates to sampling apparatus, particularly relates to a kind of Novel flue gas sampling apparatus.
Background technology
At present, the equipment for denitrifying flue gas of domestic Large-sized Coal-fired Power group mainly adopts SCR technique (SCR), SCR reactor is arranged between economizer and air preheater, it is respectively mounted a NOx sampling and analyzing device at SCR inlet flue and exhaust pass, NOx concentration is imported and exported, in order to SCR system normal table runs (see Fig. 1) for monitoring SCR. In specific design, construction and operation, we have found that, the flue gas sampling of denitrating system still suffers from some shortcomings: 1) NOx sampling and analyzing device price is higher, for cost consideration, it is usually, at import and export flue, one NOx sampling and analyzing device is respectively installed, each sampling and analyzing device joins a probe, probe belongs to single-point sampling, it is placed in flue, extract the flue gas NOx concentration near popping one's head in that is only analyzed, can not intactly measuring the NOx concentration of whole flue section, representativeness is comprehensive not; 2) owing to single-point sampling representativeness has limitation, and flow of flue gas is complicated, running is likely to occur because reconnaissance is inaccurate, cause the pollutant levels after smoke eliminator higher than the pollutant levels before purifier, the phenomenon of " reversal of the natural order of things " occurs, the ammonia spraying amount adjustment of unit is caused very big impact; 3) SCR system is arranged in high gray area, and sampling condition is severe, it is easy to causes probe blocking, is also had adverse influence simultaneously the life-span of NOx analysis element.
Summary of the invention
It is an object of the invention to overcome prior art not enough, it is provided that a kind of rational in infrastructure, the Novel flue gas sampling apparatus that reliability is high.
For achieving the above object, present invention employs techniques below scheme:
Novel flue gas sampling apparatus, is two connected from the female pipe �� D2 of sampling including sampling arm �� D1, sampling female pipe �� D2, described sampling arm �� D1 and is located in flue inner wall; Described sampling arm �� D1 is provided with the sampling aspirating hole of an equidistant perforate of row.
As preferably: described sampling aspirating hole is for carry out flow path direction perforate back to air-flow.
As preferably: described sampling arm �� D1 is located at the inlet flue duct place of Benitration reactor, the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater.
As preferably: described sampling arm �� D1 is located at the exhaust pass place of Benitration reactor, the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater.
As preferably: be connected with one section of thicker sampling stage casing �� D3 of caliber in the middle of the female pipe �� D2 of described sampling, sampling stage casing �� D3 connects thermal control smoke gas analysis equipment.
As preferably: described sampling stage casing �� D3 is also associated with blowback lines �� D4, and described blowback lines �� D4 is connected to compressed air line.
The invention has the beneficial effects as follows:
1) multi-point sampling, improves the representativeness of flue gas analysis
Novel flue gas sampling apparatus can effectively make up the defect that tradition single-point sampling arrangement samples data are single, not representative. Can pass through to sample at diverse location simultaneously, improve the representativeness of sampling, eliminate because of the under-represented measuring error caused of sampling, the sampling accuracy of deduction system.
At import and export flue, novel multi-point sampling device is installed and can be effectively prevented from importing and exporting the reversal of the natural order of things of measurement result.
2) device is simple, and sampling apparatus reliability is high
This sampling apparatus adopts female pipe-arm sampling configuration, and the flue gas extracted by each for arm thieff hatch is total at female manifold, delivers to flue gas analysis system. In flue, the layout of sampling tube is installed fixing in combinations with structures such as flue lining bars, it is not necessary to increase extra internal support, it is adaptable to all kinds of flue forms.
3) sample mode is reasonable, it is to avoid the stifled ash of analytical equipment
Thieff hatch adopts and samples back to airflow direction mode, makes full use of physics's principle of inertia, and flue dust moves due to effect of inertia downstream, and air-flow is extracted in reverse direction, significantly reduces the generation of stifled ash situation.
Meanwhile, novel sampling device adopts compression air intermittent backblowing means, and sample lines carries out blowback, and preventing and treating flue dust deposits in pipeline, protects the safe and reliable of sampling instrument. Suitable in all kinds of denitrating systems.
4) investment cost is few, and denitrating system is had no adverse effect
Device is mainly conventional material with material, it is easy to buying, advantageously reduces cost. Original equipment will not causing damage in installation process, in-site installation cost is low.
Accompanying drawing explanation
Fig. 1 is flue cross sectional representation of the present invention;
Fig. 2 is flue Longitudinal cross section schematic of the present invention;
Fig. 3 is overall system view of the present invention;
Description of reference numerals: sampling arm �� D1, the female pipe �� D2 of sampling, sampling stage casing �� D3, blowback lines �� D4, sampling aspirating hole 5, flue inner wall 6.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described further. The explanation of following embodiment is only intended to help and understands the present invention. It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention carries out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
As shown in Figure 1 to Figure 3, the Novel flue gas sampling apparatus of the present embodiment, it is two connected from the female pipe �� D2 of sampling including sampling arm �� D1, sampling female pipe �� D2, described sampling arm �� D1 and is located in flue inner wall 6; Described sampling arm �� D1 is provided with the sampling aspirating hole 5 of an equidistant perforate of row. Described sampling aspirating hole 5 is for carry out flow path direction perforate back to air-flow. Described sampling arm �� D1 is located at the inlet flue duct place of Benitration reactor, and the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater. Described sampling arm �� D1 is located at the exhaust pass place of Benitration reactor, and the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater. It is connected with one section of thicker sampling stage casing �� D3 of caliber in the middle of the female pipe �� D2 of described sampling, sampling stage casing �� D3 connects thermal control smoke gas analysis equipment. Described sampling stage casing �� D3 is also associated with blowback lines �� D4, and described blowback lines �� D4 is connected to compressed air line.
Novel flue gas sampling apparatus is mainly made up of flue gas sampling pipe, valve group, compression Air Reverse blowing apparatus etc., it is possible to be extensively arranged in SCR denitration system. Novel flue gas sampling apparatus is arranged on SCR denitration system and imports and exports between flue and air preheater exhaust pass. Draw little bypass to air preheater exhaust pass from SCR denitration system entry/exit mouth flue, utilize the pressure reduction of SCR denitration system and air preheater so that flue gas is introduced into bypass, it is possible to extracted voluntarily.
Sampling apparatus in flue generally adopts female pipe-Zhi form of tubes, the size according to flue, equidistant perforate on arm �� D1, extracts position flue gas, enters female pipe �� D2 mixing. In order to make the flue gas mix homogeneously of extraction, measuring numerical value and have more representativeness, be provided with sampling stage casing �� D3 one section thicker, to reduce flow velocity increase incorporation time, thermal control analytical equipment connects sampling stage casing. In order to avoid the flue dust blocking to thieff hatch, compression air blowback lines �� D4 is set, regularly sampling apparatus is carried out blowback. Sampling tube is generally adopted and the flue pipe with material, can be fixed on flue lining bar place, it is not necessary to additionally increase backing material.
Novel flue gas sampling apparatus, according to flue gas flow rate situation and flue size, �� D1 generally can adopt the pipe of diameter 89mm, carrys out flow path direction perforate 10mm back to air-flow, and spacing is 1000mm. As much as possible according to flow field simulation result in specific design, rationally carry out distribution design, do not increase smoke flow resistance.
Claims (6)
1. a Novel flue gas sampling apparatus, it is characterised in that: include sampling arm �� D1, sampling female pipe �� D2, described sampling arm �� D1 are two connected from the female pipe �� D2 of sampling and are located in flue inner wall (6); Described sampling arm �� D1 is provided with the sampling aspirating hole (5) of an equidistant perforate of row.
2. Novel flue gas sampling apparatus according to claim 1, it is characterised in that: described sampling aspirating hole (5) is for carry out flow path direction perforate back to air-flow.
3. Novel flue gas sampling apparatus according to claim 1, it is characterised in that: described sampling arm �� D1 is located at the inlet flue duct place of Benitration reactor, and the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater.
4. Novel flue gas sampling apparatus according to claim 1, it is characterised in that: described sampling arm �� D1 is located at the exhaust pass place of Benitration reactor, and the female pipe �� D2 of sampling is located at the exhaust pass of unit air preheater.
5. Novel flue gas sampling apparatus according to claim 1, it is characterised in that: it is connected with one section of thicker sampling stage casing �� D3 of caliber in the middle of the female pipe �� D2 of described sampling, sampling stage casing �� D3 connects thermal control smoke gas analysis equipment.
6. Novel flue gas sampling apparatus according to claim 5, it is characterised in that: described sampling stage casing �� D3 is also associated with blowback lines �� D4, and described blowback lines �� D4 is connected to compressed air line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071508.XA CN105628453A (en) | 2016-02-01 | 2016-02-01 | Novel smoke sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610071508.XA CN105628453A (en) | 2016-02-01 | 2016-02-01 | Novel smoke sampling device |
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| CN105628453A true CN105628453A (en) | 2016-06-01 |
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| CN201610071508.XA Pending CN105628453A (en) | 2016-02-01 | 2016-02-01 | Novel smoke sampling device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478469A (en) * | 2017-07-31 | 2017-12-15 | 南京圆点环境清洁技术有限公司 | A kind of waste gas collecting device |
| CN107941718A (en) * | 2017-11-25 | 2018-04-20 | 宁波亿诺维信息技术有限公司 | flue gas pollutant environment monitoring system |
| CN108187655A (en) * | 2017-12-27 | 2018-06-22 | 龙岩紫荆创新研究院 | A kind of SCR catalyst for denitrating flue gas, preparation method and applications system |
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| CN103364233A (en) * | 2012-04-11 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Smoke sampling device |
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN204882158U (en) * | 2015-07-30 | 2015-12-16 | 焦作煤业（集团）冯营电力有限责任公司 | Reverse osmosis surveys sampling device |
| CN204882168U (en) * | 2015-08-10 | 2015-12-16 | 庞灿 | Large -sized boiler flue net sampling device |
| CN205538369U (en) * | 2016-02-01 | 2016-08-31 | 浙江天地环保科技有限公司 | Novel flue gas sampling device |
-
2016
- 2016-02-01 CN CN201610071508.XA patent/CN105628453A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103364233A (en) * | 2012-04-11 | 2013-10-23 | 攀钢集团攀枝花钢铁研究院有限公司 | Smoke sampling device |
| CN103674631A (en) * | 2014-01-08 | 2014-03-26 | 国家电网公司 | Dual-pump flow-equalizing flue sampling device and sampling method |
| CN204882158U (en) * | 2015-07-30 | 2015-12-16 | 焦作煤业（集团）冯营电力有限责任公司 | Reverse osmosis surveys sampling device |
| CN204882168U (en) * | 2015-08-10 | 2015-12-16 | 庞灿 | Large -sized boiler flue net sampling device |
| CN205538369U (en) * | 2016-02-01 | 2016-08-31 | 浙江天地环保科技有限公司 | Novel flue gas sampling device |
Non-Patent Citations (1)
| Title |
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| 王卫群 等.: "《1 000MW 燃煤机组脱硝装置CEMS 采样方式的改进措施》", 《电力科技与环保》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478469A (en) * | 2017-07-31 | 2017-12-15 | 南京圆点环境清洁技术有限公司 | A kind of waste gas collecting device |
| CN107941718A (en) * | 2017-11-25 | 2018-04-20 | 宁波亿诺维信息技术有限公司 | flue gas pollutant environment monitoring system |
| CN108187655A (en) * | 2017-12-27 | 2018-06-22 | 龙岩紫荆创新研究院 | A kind of SCR catalyst for denitrating flue gas, preparation method and applications system |
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Address after: Hangzhou City, Zhejiang province 310012 Huaxing Road No. 99 (Hangzhou Neusoft business building) Applicant after: Zhejiang Tiandi Environmental Protection Technology Co., Ltd. Address before: 310003 Hangzhou City, Fung Fung Road, No. Guoxin real estate building, building 9, building 108 Applicant before: Zhejiang Tiandi Environmental Protection Engineering Co., Ltd. |
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Application publication date: 20160601 |
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| RJ01 | Rejection of invention patent application after publication |