CN201408201Y - Pitot tube device applicable to flow speed measurement of fume in short flue - Google Patents
Pitot tube device applicable to flow speed measurement of fume in short flue Download PDFInfo
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- CN201408201Y CN201408201Y CN2009200419908U CN200920041990U CN201408201Y CN 201408201 Y CN201408201 Y CN 201408201Y CN 2009200419908 U CN2009200419908 U CN 2009200419908U CN 200920041990 U CN200920041990 U CN 200920041990U CN 201408201 Y CN201408201 Y CN 201408201Y
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- tube
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- damper
- dynamic
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Abstract
The utility model discloses a pitot tube device applicable to the flow speed measurement of fume in a short flue, which comprises a plurality of pitot tube probes, a pressure equalization damper, a main dynamic tube and a main static tube. The pressure equalization damper is divided into a dynamic mixing area and a static mixing area; the dynamic tube of each pitot tube probe is respectively connected with each dynamic air inlet in the dynamic mixing area of the pressure equalization damper; the static tube of each pitot tube probe is respectively connected with each static air inlet in the static mixing area of the pressure equalization damper; the main dynamic tube is connected with the dynamic air outlet of the pressure equalization damper; and the main static tube is connected with thestatic air outlet of the pressure equalization damper. The pitot tube device can overcome the problems of stable airflow in the short flue and inaccurate fume measurement caused by non-uniform distribution of flow speed in the flue and improve the accuracy of flow speed measurement of the fume in the short flue by adopting multi-probe and multi-point sampling gas.
Description
Technical field
The utility model relates to a kind of pitot tube that is used for fixing pollution source fume continuous and automatic monitoring system, belongs to the fume emission monitoring technical field, is a kind of pitot tube device that is applicable to short flue gas fluid-velocity survey specifically.
Background technology
Fume continuous and automatic monitoring system (CEMS, Continuous Emission MonitoringSystem) from last century the eighties at first since install and use the Chinese large-sized fuel-burning power plant, especially last year, State Environmental Protection Administration was since promoting state's control major polluting sources installation construction pollution source monitoring system, and integral body has driven the technical development of CEMS industry.CEMS generally requires to measure sulphuric dioxide, oxides of nitrogen, particle concentration and the relevant Gas Parameters parameters such as (temperature, pressure, flow velocity, oxygen level, humidity) thereof of flue gas.The on-line monitoring of fixed-contamination emission sources such as present known flue, chimney, gas outlet, the flow velocity of flue gas is an important parameter must measuring, the common method of measurement of flue gas flow rate has three kinds at present, is respectively S type pitot tube method, heat balance method of and supercritical ultrasonics technology.Pitot tube method and heat balance method of are point measurement, and supercritical ultrasonics technology is measured for the line formula, and the three is the wet basis flow velocity.Wherein S type pitot tube method is modal a kind of flue gas flow rate measuring method.
Pitot tube has two pipes of gathering flue gas, and a root canal orifice facings the wind (being called dynamic pressure tube), a root canal orifice leeward (being called static tube), and the kinetic energy of the flue gas stream of being gathered converts the pressure energy to.When in the flue air current flow being arranged, dynamic pressure tube mouth of pipe windward side is subjected to gas shock, thereby dynamic pressure tube pipe internal pressure is higher, and its pressure is called " total head ", the static tube mouth of pipe is leeward, owing to be not subjected to the air-flow punching press, the pressure in its pipe is static pressure, is called " static pressure ", the difference of total head and static pressure is called differential pressure, its size is relevant with flue gas flow rate (amount) (claiming wind speed again) in the pipe, and flue gas flow rate (amount) is big more, and differential pressure is big more; Wind speed (amount) is little, and differential pressure is also little, therefore, only measures the size of differential pressure, finds out the corresponding relation of differential pressure and wind speed (amount) again, just can correctly measure discharging flue gas flow rate (wind speed) in the pipe.Fig. 1, Fig. 2 pitot tube synoptic diagram for using in the prior art is single sonde configuration, single-point sampling gas.
China stationary pollution source flue gas CEMS installs flue because the desulfurization island arrangement space is limit at present, general flue does not have enough straight lengths, the residing position of wind measuring device, its air-flow instability, flow velocity is skewness in flue, is difficult to satisfy the stable requirement in flow field, at flow velocity during less than 10m/s (when particularly flow velocity is less than 5m/s), pitot tube method is owing to adopt single probe single-point sampling gas mode, and measuring error is bigger.
The utility model content
Problem to be solved in the utility model, be to overcome the defective that prior art exists, a kind of pitot tube device that is applicable to short flue gas fluid-velocity survey is provided, adopts many probes, multi-point sampling gas, can improve the measurement accuracy of short flue gas fluid-velocity survey.
A kind of pitot tube device that is applicable to short flue gas fluid-velocity survey of the utility model is made of some pitot tube probes, equalization of pressure damper and total dynamic pressure tube, total static tube; It is characterized in that:
Described pitot tube probe is made of dynamic pressure tube and static tube;
The equalization of pressure damper is a closed container, is divided into dynamic pressure mixed zone and static pressure mixed zone, and the dynamic pressure mixed zone is provided with some dynamic pressure air intake openings and a dynamic pressure gas outlet; The static pressure mixed zone is provided with some static pressure air intake openings and a static pressure gas outlet;
The dynamic pressure tube of described each pitot tube probe joins with each dynamic pressure air intake opening of equalization of pressure damper dynamic pressure mixed zone respectively, the static tube of described each pitot tube probe joins with each static pressure air intake opening of equalization of pressure damper static pressure mixed zone respectively, total dynamic pressure tube connects the dynamic pressure gas outlet of equalization of pressure damper, total static tube connect the equalization of pressure damper the static pressure gas outlet.
The utility model pitot tube device adopts many probes, multi-point sampling gas, can overcome short flue gas stream instability, and flow velocity skewness in flue makes flue gas measure inaccurate problem, can improve the measurement accuracy of short flue gas fluid-velocity survey.
Description of drawings
Fig. 1 is existing pitot tube structural representation;
Fig. 2 is existing pitot tube structural representation;
Fig. 3 is the pitot tube apparatus structure synoptic diagram that the utility model is applicable to short flue gas fluid-velocity survey.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 3, a kind of pitot tube device that is applicable to short flue gas fluid-velocity survey is made of three pitot tube probes, equalization of pressure damper and total dynamic pressure tubes 5, total static tube 6; It is characterized in that:
Described pitot tube probe is made of dynamic pressure tube 1 and static tube 2;
The equalization of pressure damper is a closed container, is divided into dynamic pressure mixed zone 3 and static pressure mixed zone 4, and the dynamic pressure mixed zone is provided with three dynamic pressure air intake openings and a dynamic pressure gas outlet; The static pressure mixed zone is provided with three static pressure air intake openings and a static pressure gas outlet;
The dynamic pressure tube of described each pitot tube probe joins with each dynamic pressure air intake opening of equalization of pressure damper dynamic pressure mixed zone respectively, the static tube of described each pitot tube probe joins with each static pressure air intake opening of equalization of pressure damper static pressure mixed zone respectively, total dynamic pressure tube connects the dynamic pressure gas outlet of equalization of pressure damper, total static tube connect the equalization of pressure damper the static pressure gas outlet.
During use, three pitot tube probe heads evenly are located in the same cross section of flue.Strict measuring principle of pressing ASMI standard employing uniform cross section multiple spot on the flue cross section, factor is determined measure dot number according to size, the straight length of each measuring channel sectional dimension be long and short etc. again, and many measurement points are organically made up, all dynamic pressure measurement points are linked to each other with equalization of pressure damper dynamic pressure mixed zone, all static pressure measurement points link to each other with equalization of pressure damper static pressure mixed zone, total dynamic pressure tube links to each other with the positive and negative end of differential pressure transmitter respectively with total static tube, thereby record the average positive negative pressure in cross section, calculate wind speed and air quantity then.The employing of equalization of pressure damper can reduce pressure surge, improves the representative and stable of CEMS fluid-velocity survey.
Claims (1)
1, a kind of pitot tube device that is applicable to short flue gas fluid-velocity survey is made of some pitot tube probes, equalization of pressure damper and total dynamic pressure tube (5), total static tube (6); It is characterized in that:
Described pitot tube probe is made of dynamic pressure tube (1) and static tube (2);
The equalization of pressure damper is a closed container, is divided into dynamic pressure mixed zone (3) and static pressure mixed zone (4), and the dynamic pressure mixed zone is provided with some dynamic pressure air intake openings and a dynamic pressure gas outlet; The static pressure mixed zone is provided with some static pressure air intake openings and a static pressure gas outlet;
The dynamic pressure tube of described each pitot tube probe joins with each dynamic pressure air intake opening of equalization of pressure damper dynamic pressure mixed zone respectively, the static tube of described each pitot tube probe joins with each static pressure air intake opening of equalization of pressure damper static pressure mixed zone respectively, total dynamic pressure tube connects the dynamic pressure gas outlet of equalization of pressure damper, total static tube connect the equalization of pressure damper the static pressure gas outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200419908U CN201408201Y (en) | 2009-03-20 | 2009-03-20 | Pitot tube device applicable to flow speed measurement of fume in short flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200419908U CN201408201Y (en) | 2009-03-20 | 2009-03-20 | Pitot tube device applicable to flow speed measurement of fume in short flue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201408201Y true CN201408201Y (en) | 2010-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200419908U Expired - Lifetime CN201408201Y (en) | 2009-03-20 | 2009-03-20 | Pitot tube device applicable to flow speed measurement of fume in short flue |
Country Status (1)
| Country | Link |
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| CN (1) | CN201408201Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121946A (en) * | 2017-04-28 | 2017-09-01 | 皖能马鞍山发电有限公司 | A kind of power-economizing method for power plant desulfurization |
| CN108195638A (en) * | 2018-03-14 | 2018-06-22 | 华北电力科学研究院有限责任公司 | A kind of flue gas sampler for considering flue gas flow rate unevenness |
| CN108414788A (en) * | 2018-02-11 | 2018-08-17 | 河海大学 | A kind of open channel uniform flow horizontal direction multiple spot tachymeter device |
| CN109612529A (en) * | 2018-12-27 | 2019-04-12 | 广州市圣高测控科技有限公司 | A kind of measuring multiple parameters control pick-up wireless transmission integrated multi-functional instrument |
| CN111192800A (en) * | 2020-01-08 | 2020-05-22 | 平高集团有限公司 | Pressure guide pipe for arc extinguishing chamber pressure measurement and arc extinguishing chamber pressure measurement device |
-
2009
- 2009-03-20 CN CN2009200419908U patent/CN201408201Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107121946A (en) * | 2017-04-28 | 2017-09-01 | 皖能马鞍山发电有限公司 | A kind of power-economizing method for power plant desulfurization |
| CN108414788A (en) * | 2018-02-11 | 2018-08-17 | 河海大学 | A kind of open channel uniform flow horizontal direction multiple spot tachymeter device |
| CN108414788B (en) * | 2018-02-11 | 2020-02-18 | 河海大学 | Horizontal direction multipoint velocimeter device for uniform flow of open channel |
| CN108195638A (en) * | 2018-03-14 | 2018-06-22 | 华北电力科学研究院有限责任公司 | A kind of flue gas sampler for considering flue gas flow rate unevenness |
| CN109612529A (en) * | 2018-12-27 | 2019-04-12 | 广州市圣高测控科技有限公司 | A kind of measuring multiple parameters control pick-up wireless transmission integrated multi-functional instrument |
| CN111192800A (en) * | 2020-01-08 | 2020-05-22 | 平高集团有限公司 | Pressure guide pipe for arc extinguishing chamber pressure measurement and arc extinguishing chamber pressure measurement device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 210042, Jiangsu province Nanjing Xuanwu Avenue 699-8 Xu Zhuang Software Park Development Zone 3, 1 Patentee after: Nanjing Assen Environmental Technology Co., Ltd. Address before: 210042, Jiangsu province Nanjing Xuanwu Avenue 699-8 Xu Zhuang Software Park Development Zone 3, 1 Patentee before: Nanjing Assen Environment Technology Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100217 |