CN114894561A - Mixed sampling measurement structure with ash removal function and working method thereof - Google Patents
Mixed sampling measurement structure with ash removal function and working method thereof Download PDFInfo
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- CN114894561A CN114894561A CN202210460815.2A CN202210460815A CN114894561A CN 114894561 A CN114894561 A CN 114894561A CN 202210460815 A CN202210460815 A CN 202210460815A CN 114894561 A CN114894561 A CN 114894561A
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- flue gas
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- centrifugal
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- 238000005070 sampling Methods 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005259 measurement Methods 0.000 title abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 125
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 19
- 239000002956 ash Substances 0.000 claims description 121
- 239000010881 fly ash Substances 0.000 claims description 37
- 238000000605 extraction Methods 0.000 claims description 13
- 238000010926 purge Methods 0.000 claims description 7
- 239000003245 coal Substances 0.000 abstract description 3
- 239000000523 sample Substances 0.000 description 18
- 239000000779 smoke Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- COCAUCFPFHUGAA-MGNBDDOMSA-N n-[3-[(1s,7s)-5-amino-4-thia-6-azabicyclo[5.1.0]oct-5-en-7-yl]-4-fluorophenyl]-5-chloropyridine-2-carboxamide Chemical compound C=1C=C(F)C([C@@]23N=C(SCC[C@@H]2C3)N)=CC=1NC(=O)C1=CC=C(Cl)C=N1 COCAUCFPFHUGAA-MGNBDDOMSA-N 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
Images
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
- G01N1/24—Suction devices
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention provides a mixed sampling measurement structure with a dust removing function and a working method thereof, wherein the mixed sampling measurement structure comprises the following steps: the device comprises a sampling chamber, a centrifugal ash removal chamber, a mixing device and a gas inlet, wherein one end of the sampling chamber is connected with the centrifugal ash removal chamber through a clean gas inlet, the other end of the sampling chamber is connected with the outlet of the mixing device, the centrifugal ash removal chamber is connected with the gas inlet, and the negative pressure of the outlet of the mixing device is greater than the negative pressure of the gas inlet so that the multi-path ash-removed gas can penetrate through the whole sampling chamber; its simple structure, convenient operation can detach the dust in the flue gas at the in-process of measurement, not only makes the flue gas sample measurement of coal fired power plant emission more accurate, has more improved measuring efficiency for the life of this structure has obtained showing the improvement.
Description
Technical Field
The invention relates to the technical field of ash removal sampling measurement of coal-fired power plants, in particular to a mixed sampling measurement structure with an ash removal function and a working method thereof.
Background
With the stricter and stricter emission standards of coal, air preheaters and denitration devices are generally installed in coal-fired power plants in China, and the performance of the denitration devices directly influences the performance and the service life of downstream equipment of boilers, so that the power plants are additionally provided with various instruments for sampling and testing and checking the states and the performances of various devices. Sampling device mainly uses single-point sampling at present, and the flue gas representativeness of getting is not enough, perhaps the flying dust is great causes the instrument to block up easily, causes test data to have the error, and secondly current sampling device part requires that the great instrument in flue space can not install, influences equipment performance.
The existing sampling detection equipment does not have the function of removing fly ash, easily causes the blockage of a sampling probe, influences the measurement precision and the measurement efficiency, increases the difficulty for controlling the power plant equipment, increases the control cost and reduces the service life of downstream equipment. Meanwhile, sampling points of the sampling chamber are fewer, and some instruments cannot be installed, for example, some imported light-focusing ammonia analyzers (requiring a light-focusing distance of more than 750 mm), and instruments which are long in sampling probe and cannot be cut, so that the sampling and measuring precision of the flue gas discharged by a coal-fired power plant is low, and the efficiency of flue gas measurement is low.
Disclosure of Invention
In order to solve the technical problems, the invention provides a mixed sampling and measuring structure with an ash removal function and a working method thereof, the structure is simple, the operation is convenient, dust in flue gas can be removed in the measuring process, the sampling and measuring of the flue gas discharged by a coal-fired power plant are more accurate, the measuring efficiency is improved, and the service life of the structure is obviously prolonged.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a mixed sampling measurement structure with ash removal function comprises: the sampling chamber, sampling chamber one end is connected with centrifugal ash removal chamber through clean flue gas entry, the sampling chamber other end and mixing arrangement exit linkage, be connected with the flue gas entry on the centrifugal ash removal chamber, the negative pressure that the mixing arrangement exported is greater than the negative pressure of flue gas entry link up inside whole sampling chamber with the flue gas that makes behind the multichannel ash removal.
The invention provides a mixed sampling and measuring structure with a dust removing function and a working method thereof, which have the advantages of simple structure and convenient operation, and can remove dust in flue gas in the measuring process, thereby not only enabling the sampling and measuring of the flue gas discharged by a coal-fired power plant to be more accurate, but also improving the measuring efficiency and obviously prolonging the service life of the structure.
As the preferred technical scheme, be equipped with a plurality of ash-collecting pieces along the periphery of clean flue gas entry, centrifugal dusting room lateral wall with the ash-collecting piece is connected, the ash-collecting piece passes through defeated ash pipe and mixing arrangement exit linkage.
As a preferred technical scheme, the sampling chamber comprises a sampling body piece and sampling branch pieces, wherein the sampling branch pieces are oppositely arranged on two sides of the sampling body piece, and one ends of the sampling branch pieces are connected with the sampling body piece.
As a preferred technical scheme, the other end of the sampling branch piece is connected with the light-focusing instrument.
According to a preferable technical scheme, a purge gas inlet is oppositely connected to the sampling branch piece, and the purge gas inlet is connected with a pneumatic valve.
As a preferred technical scheme, a plurality of spare sampling holes are formed in the sampling body piece and are used for being connected with a smoke measurer.
The preferable technical scheme comprises the following steps: the drainage tubes are oppositely arranged on two sides of the sampling body part, one end of each drainage tube is connected with the sampling branch part, and the other end of each drainage tube is connected with the outlet of the mixing device.
The preferable technical scheme comprises the following steps: the extraction type instrument is connected with one end of the centrifugal ash removal chamber, sequentially passes through the centrifugal ash removal chamber and the clean flue gas inlet and stretches the sampling head of the extraction type instrument into the sampling chamber.
The preferable technical scheme comprises the following steps: the ash collecting groove is connected with the other end of the centrifugal ash removing chamber through a sampling branch piece, and the ash collecting groove is arranged along the sampling body piece in a relatively inclined mode.
The invention provides a working method of a mixed sampling and measuring structure with an ash removal function, which comprises the following steps:
when the centrifugal dust remover works, the negative pressure of the outlet of the mixing device is larger than the negative pressure of the flue gas inlet, so that the measured flue gas flows in the whole structure, and a pressure difference is formed between the outlet of the mixing device and the centrifugal dust removing chamber;
the measured flue gas is introduced into the centrifugal ash removal chamber from the flue gas inlet, the flue gas inlet is tightly attached to the side wall of the centrifugal ash removal chamber, the measured flue gas centrifugally rotates and separates fly ash in the measured flue gas in the centrifugal ash removal chamber under the action of centrifugal force to obtain flue gas after fly ash removal, the separated fly ash continuously centrifugally rotates along the side wall of the centrifugal ash removal chamber under the action of centrifugal force to enter an ash collection part, and the fly ash entering the ash collection part is conveyed to the outlet of the mixing device through an ash conveying pipe and is discharged;
after the flue gas without the fly ash enters the sampling chamber through the clean flue gas inlet, the flue gas without the fly ash is divided into multiple paths of flue gas by utilizing the pressure difference between the outlet of the mixing device and the centrifugal ash removal chamber so as to enable the flue gas without the fly ash to penetrate through the inside of the whole structure, the flue gas without the fly ash is sampled and measured by a plurality of measuring instruments, and the measured flue gas is discharged through the outlet of the mixing device.
Drawings
FIG. 1 is a front view of a self-contained ash removal hybrid sampling and measurement architecture provided by the present invention;
FIG. 2 is a rear view of a hybrid sampling and measurement structure with ash removal capability provided by the present invention;
FIG. 3 is a front side view of a hybrid sampling and measurement structure with ash removal capability according to the present invention;
FIG. 4 is a disassembled front view of a hybrid sampling and measurement structure with ash removal capability provided by the present invention;
FIG. 5 is a right side view of the hybrid sampling measurement architecture with ash removal provided therein, shown disassembled;
wherein: 1-a sampling chamber; 2-clean flue gas inlet; 3-centrifugal ash removal chamber; 4-mixing device outlet; 5-a flue gas inlet; 6-ash collecting part; 7-ash conveying pipe; 8-a sampling body member; 9-sampling branch parts; 10-light-focusing instrument; 11-purge gas inlet; 12-a pneumatic valve; 13-spare sampling holes; 14-a drainage tube; 15-removable meter; 16-ash collecting groove; 17-flue gas after fly ash removal; 18-measurement of Smoke.
Detailed Description
It should be noted that the terms "first" and "second" are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms are not used in a special sense if not stated otherwise, and therefore, the scope of the present invention should not be construed as being limited.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It is understood that the invention achieves the objects of the invention by means of some embodiments.
As shown in fig. 1 to 3, the present invention provides a mixed sampling and measuring structure with ash removal function, comprising: sampling chamber 1, sampling chamber 1 one end is connected with centrifugal deashing room 3 through clean flue gas entry 2, the sampling chamber 1 other end is connected with mixing arrangement export 4, be connected with flue gas entry 5 on the centrifugal deashing room 3, the periphery of clean flue gas entry is equipped with two collection ash spare 6 that are relative setting, centrifugal deashing room 3 lateral wall with collection ash spare 6 is connected, collection ash spare 6 is connected with mixing arrangement export 4 through ash conveying pipe 7, sampling chamber 1 includes sampling body spare 8 and sample branch spare 9, sample branch spare 9 is relative setting up in sampling body spare 8 both sides, and sample branch spare 9 one end with sampling body spare 8 is connected, sample branch spare 9 other end is connected with the long optical instrument 10 of focusing on the optical distance, be connected with sweep gas entry 11 on sample branch spare 9 relatively, the sweep gas entry 11 is connected with pneumatic valve 12, opens the sweep gas that pneumatic valve 12 control sweep gas entry 11 lets in order to can be to sweeping the dust in sampling chamber 1, be equipped with a plurality of reserve thief holes 13 on the sample body spare 8, reserve thief hole 13 is used for connecting flue gas caliber (not shown), and a plurality of reserve thief holes 13 set up and have increased the measuring point, have improved the accuracy of measuring the flue gas, flue gas caliber (not shown) is to the short light meter, extraction formula instrument or other caliber of light distance, drainage tube 14 be relative set up in sample body spare 8 both sides, drainage tube 14 one end with sampling branch piece 9 is connected, the drainage tube 14 other end with mixing arrangement export 4 is connected, and the setting up of drainage tube 14 makes the flue gas fully flow mix in sampling chamber 1, improves the accuracy that various instruments measured the flue gas, the extraction instrument 15 is connected with one end of the centrifugal ash removal chamber 3, the extraction instrument 15 sequentially passes through the centrifugal ash removal chamber 3 and the clean flue gas inlet 2, a sampling head of the extraction instrument 15 extends into the sampling chamber 1 to measure the flue gas after ash removal, the ash collecting groove 16 is connected with the other end of the centrifugal ash removing chamber 3 through a sampling branch piece 9, the ash collecting groove 16 is arranged along the sampling body part 8 in a relatively inclined way, the ash collecting groove 16 is arranged so as to collect the fine ash which can not be removed by the centrifugal ash removing chamber 3, and then the collected fine ash falls into the outlet 4 of the mixing device to be discharged, the arrangement of the ash collecting groove 16 further reduces the probability of blockage of a flue gas measurer caused by the fine ash which can not be removed by the centrifugal ash removing chamber 3, further prolongs the service life of the structure, the negative pressure of the mixing device outlet 4 is greater than the negative pressure of the flue gas inlet 5, so that the flue gas subjected to multi-path ash removal penetrates through the whole sampling chamber 1. This structure makes can both install to light formula instrument and extraction formula instrument, and various instrument integration not only increase coal fired power plant's the convenience of maintaining in this structure, has more improved the accuracy of measuring the flue gas.
As shown in fig. 4-5, the mixing sampling measurement structure with ash removal function provided by the present invention has a main flue gas measurement pipe communicated with a flue gas inlet 5, the method comprises the following steps that measurement flue gas in a measurement flue gas main pipe is conveyed to enter a flue gas inlet 5, the flue gas inlet 5 is communicated with a centrifugal ash removal chamber 3, the centrifugal ash removal chamber 3 is of a conical structure, an extraction type instrument 15 is installed on a central opening at one end of the centrifugal ash removal chamber 3, two ash collecting pieces 6 are oppositely communicated at the other end of the centrifugal ash removal chamber 3, ash is convenient to convey, the measurement flue gas inlet 5 is tightly attached to the side wall of the centrifugal ash removal chamber 3, the measurement flue gas is centrifugally rotated in the centrifugal ash removal chamber 3 under the action of centrifugal force to separate fly ash in the measurement flue gas to obtain the flue gas without the fly ash, the separated fly ash is continuously centrifugally rotated along the side wall of the centrifugal ash removal chamber 3 under the action of the centrifugal force to enter the ash collecting pieces 6, and the fly ash entering the ash collecting pieces 6 is conveyed to an outlet 4 of a mixing device through an ash conveying pipe 7 and is discharged; clean flue gas entry 2 adopts the volume of toper cylinder structure in order to increase collection ash spare 6, sample branch 9 be relative set up in sample body spare 8 both sides, just sample branch 9 one end with sample body spare 8 is connected, sample branch 9 other end with to the longer optical instrument 10 that is to the light distance be connected sample branch 9 is last to be connected with the sweep gas entry 11 relatively, the sweep gas entry 11 is connected with pneumatic valve 12, opens pneumatic valve 12, and the sweep gas that the sweep gas entry 11 lets in sweeps the ash removal in to sampling chamber 1, just collection ash groove 16 along the vertical direction of sample body spare 8 is the symmetry slope setting, and the setting of collection ash groove 16 is so that centrifugal ash removal chamber 3 gets rid of after the fine ash collection, and the fine ash after will collecting falls into mixing arrangement export 4 and discharges. The draft tube 14 transmits a part of the smoke from the two ends of the sampling branch 9 to the outlet 4 of the mixing device, so that the smoke sampling measurement is more accurate. The ash conveying pipe 7 is used for communicating the ash collecting part 6 with the outlet 4 of the mixing device, so that the fly ash collected in the ash collecting part 6 can be conveniently conveyed to the outlet 4 of the mixing device. Be around sample body spare 8 and be provided with two pairs of spare thief holes 13 relatively, spare thief hole 13 is used for connecting the flue gas caliber (not shown), and spare thief hole 13 sets up increases the flue gas measuring point, has improved the accuracy of measuring the flue gas.
The invention provides a working method of a mixed sampling and measuring structure with an ash removal function, which comprises the following steps:
when the centrifugal dust removing device works, the negative pressure of the outlet 4 of the mixing device is larger than the negative pressure of the flue gas inlet 5, so that the measured flue gas flows in the whole structure, and a pressure difference is formed between the outlet 4 of the mixing device and the centrifugal dust removing chamber 3;
the measured flue gas is introduced into the centrifugal ash removal chamber 3 from the flue gas inlet 5, the flue gas inlet 5 is tightly attached to the side wall of the centrifugal ash removal chamber 3, the measured flue gas centrifugally rotates and separates fly ash in the measured flue gas in the centrifugal ash removal chamber 3 under the action of centrifugal force to obtain the flue gas after fly ash removal, the separated fly ash continuously centrifugally rotates along the side wall of the centrifugal ash removal chamber 3 under the action of centrifugal force to enter an ash collection part 6, and the fly ash entering the ash collection part 6 is conveyed to an outlet 4 of the mixing device through an ash conveying pipe 7 and is discharged;
after the flue gas without the fly ash enters the sampling chamber 1 through the clean flue gas inlet 2, the flue gas without the fly ash is divided into multiple paths of flue gas by utilizing the pressure difference between the outlet 4 of the mixing device and the centrifugal ash removal chamber 3 so as to enable the flue gas without the fly ash to penetrate through the inside of the whole structure, the flue gas without the fly ash is sampled and measured by a plurality of measuring instruments, and then the measured flue gas is discharged through the outlet of the mixing device.
As shown in fig. 1-3, the mixed sampling measurement structure with ash removal function provided by the present invention is characterized in that before operation, a flue gas inlet 5 is connected with a flue gas main pipe, a centrifugal ash removal chamber 3 is connected with a sampling chamber 1 through a clean flue gas inlet 2, the side wall of the centrifugal ash removal chamber 3 is connected with an ash collection member 6, the ash collection member 6 is connected with a mixing device outlet 4 through an ash conveying pipe 7, all connecting parts are sealed to ensure that the whole structure is airtight, a pneumatic valve 12 is closed, an extraction type instrument 15 is installed on the centrifugal ash removal chamber 3, a sampling head of the extraction type instrument 15 extends into the sampling chamber 1, light type instruments 10 with long light distances are respectively installed on two ends of an upper sampling branch member 9, light type instruments with short light distances or sampling rod extraction type instruments with short light distances are installed on a standby sampling hole 13, and a sampling head of a light type instrument with short light distances or a sampling rod extraction type instrument with short light distances is extended into the sampling chamber 1 to perform sampling measurement on flue gas.
When the centrifugal dust removing device works, the negative pressure of the outlet 4 of the mixing device is larger than the negative pressure of the flue gas inlet 5, so that the measured flue gas flows in the whole structure, and a pressure difference is formed between the outlet 4 of the mixing device and the centrifugal dust removing chamber 3;
the measurement flue gas 18 is introduced into the centrifugal ash removal chamber 3 from the flue gas inlet 5, the flue gas inlet 5 is tightly attached to the side wall of the centrifugal ash removal chamber 3, the measurement flue gas centrifugally rotates and separates fly ash in the measurement flue gas in the centrifugal ash removal chamber 3 under the action of centrifugal force to obtain fly ash-removed flue gas 17, the separated fly ash continuously centrifugally rotates along the side wall of the centrifugal ash removal chamber 3 under the action of centrifugal force to enter the ash collection member 6, and the fly ash entering the ash collection member 6 is conveyed to the outlet 4 of the mixing device through the ash conveying pipe 7 and is discharged;
after the flue gas without the fly ash enters a sampling chamber 1 through a clean flue gas inlet 2, the flue gas without the fly ash is divided into multiple paths of flue gas by utilizing the pressure difference between an outlet 4 of a mixing device and a centrifugal ash removal chamber 3 so as to enable the multiple paths of flue gas to penetrate through the inside of the whole structure, a plurality of measuring instruments sample and measure the flue gas 17 without the fly ash, the measured flue gas is discharged through an outlet 4 of the mixing device, 1 path of the multiple paths of flue gas flows to the outlet 4 of the mixing device along the inside of a sampling body part 8, 2 paths of the multiple paths of flue gas respectively flow to the outlet 4 of the mixing device along the inside of a drainage tube 14, 2 paths of the multiple paths of flue gas respectively flow to the outlet 4 of the mixing device along the inside of an ash collection groove 16, the 5 paths of the multiple paths of flue gas can be enabled to have the flue gas to pass through according to the principle of pressure balance, the flue gas in the whole sampling chamber 1 is ensured to have no dead angle, thereby ensuring the accuracy of the flue gas measurement of various instruments and the convenience of structure maintenance, the pneumatic valve 12 is opened or closed according to the dust content, and the purge gas inlet 11 and the pneumatic valve 12 cooperate with each other to purge dust in the sampling chamber 1.
The invention provides a mixed sampling and measuring structure with a dust removing function and a working method thereof, which have the advantages of simple structure and convenient operation, and can remove dust in flue gas in the measuring process, thereby not only enabling the sampling and measuring of the flue gas discharged by a coal-fired power plant to be more accurate, but also improving the measuring efficiency and obviously prolonging the service life of the structure.
It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all modifications and equivalents falling within the scope of the appended claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. The utility model provides a from taking mixing of ash removal function to take a sample to measure structure which characterized in that includes: the sampling chamber, sampling chamber one end is connected with centrifugal ash removal chamber through clean flue gas entry, the sampling chamber other end and mixing arrangement exit linkage, be connected with the flue gas entry on the centrifugal ash removal chamber, the negative pressure that the mixing arrangement exported is greater than the negative pressure of flue gas entry link up inside whole sampling chamber with the flue gas that makes behind the multichannel ash removal.
2. The structure of claim 1, wherein a plurality of ash collecting members are arranged along the outer circumference of the clean flue gas inlet, the sidewall of the centrifugal ash removing chamber is connected with the ash collecting members, and the ash collecting members are connected with the outlet of the mixing device through ash conveying pipes.
3. The structure of claim 2, wherein the sampling chamber comprises a sampling body member and a sampling branch member, the sampling branch member is oppositely disposed on two sides of the sampling body member, and one end of the sampling branch member is connected to the sampling body member.
4. The structure of claim 3, wherein the other end of the sampling branch is connected to a light-focusing instrument.
5. The structure of claim 3, wherein a purge gas inlet is connected to the sampling branch member in a manner opposite to that of the sampling branch member, and the purge gas inlet is connected to a pneumatic valve.
6. The structure of claim 3, wherein the sampling body member is provided with a plurality of spare sampling holes for connecting to a flue gas measuring device.
7. The structure of claim 1, comprising: the drainage tubes are oppositely arranged on two sides of the sampling body part, one end of each drainage tube is connected with the sampling branch part, and the other end of each drainage tube is connected with the outlet of the mixing device.
8. The structure of claim 3, comprising: and the extraction type instrument is connected with one end of the centrifugal ash removal chamber.
9. The structure of claim 8, comprising: the ash collecting groove is connected with the other end of the centrifugal ash removing chamber through a sampling branch piece, and the ash collecting groove is arranged along the sampling body piece in a relatively inclined mode.
10. A working method of a mixed sampling and measuring structure with an ash removal function is characterized by comprising the following steps:
when the centrifugal dust remover works, the negative pressure of the outlet of the mixing device is larger than the negative pressure of the flue gas inlet, so that the measured flue gas flows in the whole structure, and a pressure difference is formed between the outlet of the mixing device and the centrifugal dust removing chamber;
the measured flue gas is introduced into the centrifugal ash removal chamber from the flue gas inlet, the flue gas inlet is tightly attached to the side wall of the centrifugal ash removal chamber, the measured flue gas centrifugally rotates and separates fly ash in the measured flue gas in the centrifugal ash removal chamber under the action of centrifugal force to obtain flue gas after fly ash removal, the separated fly ash continuously centrifugally rotates along the side wall of the centrifugal ash removal chamber under the action of centrifugal force to enter an ash collection part, and the fly ash entering the ash collection part is conveyed to the outlet of the mixing device through an ash conveying pipe and is discharged;
after the flue gas without the fly ash enters the sampling chamber through the clean flue gas inlet, the flue gas without the fly ash is divided into multiple paths of flue gas by utilizing the pressure difference between the outlet of the mixing device and the centrifugal ash removal chamber so as to enable the flue gas without the fly ash to penetrate through the inside of the whole structure, the flue gas without the fly ash is sampled and measured by a plurality of measuring instruments, and the measured flue gas is discharged through the outlet of the mixing device.
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| CN103575567A (en) * | 2013-10-30 | 2014-02-12 | 广东电网公司电力科学研究院 | Continuous flying ash sampling device based on emission spectrum measuring technology |
| CN204085964U (en) * | 2014-08-25 | 2015-01-07 | 西安西热锅炉环保工程有限公司 | A kind of mobile portable twin-stage is separated constant speed dust sampler |
| CN106908275A (en) * | 2017-02-24 | 2017-06-30 | 中国石油天然气集团公司 | Oil pipeline on-line period apparatus and method |
| CN211927711U (en) * | 2019-12-03 | 2020-11-13 | 华电电力科学研究院有限公司 | Fly ash carbon content on-line measuring device |
| CN211785102U (en) * | 2020-03-13 | 2020-10-27 | 苏州西热节能环保技术有限公司 | Flue gas denitrating ammonia escape measurement and analysis device based on multi-point sampling |
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