CN114577548A - Full-section multipoint flue gas constant-speed sampling system - Google Patents
Full-section multipoint flue gas constant-speed sampling system Download PDFInfo
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- CN114577548A CN114577548A CN202210271328.1A CN202210271328A CN114577548A CN 114577548 A CN114577548 A CN 114577548A CN 202210271328 A CN202210271328 A CN 202210271328A CN 114577548 A CN114577548 A CN 114577548A
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- sampling
- flue gas
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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
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- 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 is suitable for the technical field of flue gas measurement, and provides a full-section multipoint flue gas constant-speed sampling system; the method comprises the following steps: the multipoint flue gas collecting component is arranged in the flue and is connected with the analyzing component, and the analyzing component is used for analyzing the collected flue gas; the multipoint flue gas collecting component comprises a plurality of sampling guns arranged in a flue, wherein a plurality of sampling gun probe rods arranged on the same section in the flue are respectively arranged on the sampling guns, and a plurality of constant-speed sampling holes are arranged on the sampling gun probe rods in an array manner; the multi-point acquisition component further comprises a plurality of sampling guns which are respectively communicated with the input end of the pipeline component, and the output end of the pipeline component is communicated with the input end of the analysis component. The measurement system has stronger representativeness and can truly reflect the average concentration change of pollutants on the section of the flue; the usability of the measurement system is improved, and the measurement of the smoke pollutants is ensured to be uninterrupted and free of blind areas; is beneficial to effectively controlling the emission of the smoke pollutants.
Description
Technical Field
The invention relates to the technical field of flue gas measurement, in particular to a full-section multipoint flue gas constant-speed sampling system.
Background
The smoke component analysis instrument must work under clean environment and clean sample gas condition, the existing smoke continuous measurement system extracts smoke to a far end through sampling, removes impurities and purifies the smoke to form qualified sample gas through sample gas pretreatment, and then sends the qualified sample gas into the instrument for analysis, and the sampling of the common smoke continuous measurement system is realized through a sampling gun, namely through sampling at a point in a flue.
The size of the flue is usually very large, the flue has a very wide cross section, the flow speed and the concentration in the flue are not uniformly distributed, and the average value of pollutants in the whole cross section is difficult to truly reflect by adopting single-point sampling. The average concentration of the whole flue section must be measured to obtain the real pollutant emission condition, and the average concentration can be obtained by section multipoint constant-speed sampling.
Meanwhile, the continuous flue gas measurement system needs frequent purging to prevent the sampling gun from being blocked, and the instrument is in a position-keeping state and does not perform measurement in the purging stage of the system, so that a dead zone exists in the measurement system for a period of time, and a long-time control dead zone exists in the control system. The multi-point time-sharing purging can effectively avoid the situation.
Disclosure of Invention
The invention aims to provide a full-section multipoint flue gas constant-speed sampling system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a full-section multipoint constant velocity flue gas sampling system comprising: the multipoint flue gas collecting component is arranged in the flue and is connected with the analyzing component, and the analyzing component is used for analyzing the collected flue gas;
the multipoint flue gas collecting component comprises a plurality of sampling guns arranged in a flue, wherein a plurality of sampling gun probe rods arranged on the same section in the flue are respectively arranged on the sampling guns, and a plurality of constant-speed sampling holes are arranged on the sampling gun probe rods in an array manner; the multipoint acquisition component further comprises a plurality of sampling guns which are respectively communicated with the input end of the pipeline component, and the output end of the pipeline component is communicated with the input end of the analysis component.
As a further scheme of the invention: the sampling gun also includes a purge valve.
As a still further scheme of the invention: each of the tubing assemblies includes a tubing and a sampling pump mounted on the tubing.
As a still further scheme of the invention: the output end of each pipeline is connected to the analysis component, and the output end of each pipeline is communicated with the input end of the sewage draining outlet through a flow regulating valve.
As a still further scheme of the invention: the flow regulating valve is arranged at the output end of the sampling pump.
As a still further scheme of the invention: the pipeline is also provided with a dehydrator.
As a still further scheme of the invention: and the pipeline is also provided with a sampling valve.
As a still further scheme of the invention: the analysis part comprises a sample gas mixer, a dehydrator and an analyzer, wherein the output end of the sample gas mixer is communicated with the input end of the analyzer through the dehydrator, the output end of the pipeline assembly is communicated with the input end of the sample gas mixer, and the output end of the sample gas mixer is communicated with the input end of the sewage draining outlet through a flow regulating valve.
Compared with the prior art, the invention has the beneficial effects that:
1. the measurement system has stronger representativeness and can truly reflect the average concentration change of pollutants on the section of the flue;
2. the usability of the measurement system is improved, and the measurement of the smoke pollutants is ensured to be uninterrupted and free of blind areas;
3. is beneficial to effectively controlling the emission of the smoke pollutants.
Drawings
Fig. 1 is a schematic structural diagram of a full-section multipoint flue gas constant-speed sampling system.
In the figure: 1-a sampling gun, 101-a sampling gun probe rod, 102-a constant-speed sampling hole, 103-a purge valve, 2-a sampling valve, 3-a dehydrator, 4-a sampling pump, 5-a flow regulating valve, 6-a sample gas mixer, 7-a sewage draining outlet and 8-an analyzer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, in embodiment 1 of the present invention, a structure diagram of a full-section multipoint constant-velocity flue gas sampling system provided in the embodiment of the present invention includes: the multipoint flue gas collecting component is arranged in the flue and is connected with the analyzing component, and the analyzing component is used for analyzing the collected flue gas;
the multipoint flue gas collecting component comprises a plurality of sampling guns 1 arranged in a flue, sampling gun probe rods 101 arranged on the same section in the flue are respectively arranged on the sampling guns 1, and a plurality of constant-speed sampling holes 102 are arranged on the sampling gun probe rods 101 in an array manner; a plurality of the multiple spot collection part still includes a plurality ofly correspond in a plurality of sampling guns 1 and pipeline assembly's input intercommunication respectively, pipeline assembly's output all communicates with analysis part's input.
Specifically, a section is selected in the flue, the sampling guns 1 are inserted into the depth direction of the section, multiple points of constant-speed sampling holes 102 are arranged at equal intervals on 102 of each sampling gun 1, multiple points in the depth direction are formed, and for example, 3 holes are arranged in one constant-speed sampling hole 102. A plurality of sampling guns 1 such as 3 are arranged at equal intervals in the width direction of the section, so that 9-point sampling can be formed on the section, and the number of points can be increased according to the size of a flue. The sampling gun 1 is inserted in a flexible arrangement mode and is convenient to maintain.
The invention effectively solves the problem of the locality of the measurement of the large-size flue gas pollutants, improves the representativeness of the measurement of the flue gas pollutants, can realize the uninterrupted and continuous measurement of the pollutants without being influenced by instrument blowing, provides reliable pollutant concentration data for a control system and avoids the dead zone of the system.
The constant-speed sampling is divided into constant speed of each hole of each sampling gun 1 and constant speed of each sampling gun 1. The opening size of each sampling gun 1 is designed according to the rated sampling flow rate and the insertion depth and the constant speed principle, and holes with different sizes are opened from deep to shallow.
Example 2
Referring to fig. 1, the main difference between the present embodiment 2 and the embodiment 1 is that each of the pipeline assemblies includes a pipeline and a sampling pump 4 installed on the pipeline, and the sampling pump 4 provides power for collecting gas. The sampling pump 4 is a quantitative air pump.
As a preferred embodiment of the present invention, the output end of each of the pipelines is connected to the analysis component, and the output end of the pipeline is further communicated with the input end of the sewage discharge outlet 7 through the flow regulating valve 5, so that each of the air pumping pipelines is provided with the bypass exhaust and flow regulating valves, thereby ensuring the rated flow required by the operation of the sampling pump 4 and accurately adjusting the static deviation of each pump.
In a preferred embodiment of the present invention, the flow regulating valve 5 is disposed at the output end of the sampling pump 4.
In a preferred embodiment of the present invention, the pipeline is further provided with a dehydrator 3 for removing wastewater of collected gas.
As a preferred embodiment of the present invention, a sampling valve 2 is further provided on the pipe.
Sampling rifle 1 still includes purge valve 103, all sets up purge valve 103 on the sampling rifle 1, will close this way sampling valve 2 and sampling pump 4 when need sweeping all the way, will sample the rifle and keep apart, then opens purge valve 103 and sweep this way sampling rifle 1 with compressed air, and the sampling rifle 1 that does not sweep normally samples and the analysis, adopts the mode that the timesharing is gone round and is patrolled only to carry out the work of sweeping of a sampling rifle 1 at every turn.
As a preferred embodiment of the present invention, the analyzing component includes a sample gas mixer 6, a dehydrator 3 and an analyzer 8, an output end of the sample gas mixer 6 is communicated with an input end of the analyzer 8 through the dehydrator 3, output ends of the plurality of pipe assemblies are all communicated with an input end of the sample gas mixer 6, and an output end of the sample gas mixer 6 is further communicated with an input end of a sewage outlet 7 through a flow regulating valve 5.
Specifically, the output ends of the pipelines are communicated with the input end of the sample gas mixer 6.
Sample gas of each branch is mixed by a sample gas mixer 6 and then is sent to an analyzer, the mixer 6 is provided with an emptying flow regulating valve 5, the sample gas sent to the analyzer 8 is quantitatively controlled by regulating the exhaust volume, in order to ensure gas replacement and the flow of the sample gas of the instrument, the sample gas volume which is converged into the mixer 6 is more than 2 times of the demand of the sample gas of the analyzer, and redundant sample gas is emptied by the flow regulating valve 5; the single sampling gun 1 has enough gas volume when on line, so the design flow of each sampling pump 4 is 3 times of the required gas volume of the analyzer.
The working principle of the invention is as follows:
a sampling gun probe rod 101 of each sampling gun 1, which is inserted into a flue, is provided with a plurality of constant-speed sampling holes 102, and smoke at different positions along the sampling gun probe rod 101 is extracted through the constant-speed sampling holes 102 at the same flow rate; the extracted flue gas is mixed and filtered, then flows to a sampling valve 2 through a sampling pipeline, passes through a primary filter 3 and is extracted by a quantitative sampling pump 4; one path of the outlet of the sampling pump 4 is emptied through a flow regulating valve 5, and the other path of the outlet enters a sample gas mixer 6 to be mixed with other two paths of incoming gas to form qualified sample gas for analysis; one path of the outlet of the mixer 6 passes through the second-stage filter 3 to the analyzer 8 to complete measurement, the other path of the outlet is emptied through the flow regulating valve 5, and the flow regulating valve 5 controls the flow of the sample gas entering the instrument.
The design flow of each sampling pump 4 is 3 times of the sample gas flow of the analyzer 8, the minimum air inflow of the mixer 6 is 2 times of the sample gas flow of the analyzer 8, and redundant sample gas is exhausted through the flow regulating valve 5.
When one path needs purging, the sampling valve 2 and the sampling pump 4 are closed, the sampling gun is isolated, and then the purging valve 103 is opened to purge the sampling gun by compressed air.
In the description of the present invention, it is to be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, in the description of the present invention, "a plurality" means two or more unless otherwise specified. A feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. A full-section multipoint flue gas constant-velocity sampling system, comprising: the multipoint flue gas collecting component is arranged in the flue and is connected with the analyzing component, and the analyzing component is used for analyzing the collected flue gas;
the multipoint flue gas collecting component comprises a plurality of sampling guns arranged in a flue, wherein a plurality of sampling gun probe rods arranged on the same section in the flue are respectively arranged on the sampling guns, and a plurality of constant-speed sampling holes are arranged on the sampling gun probe rods in an array manner; the multi-point acquisition component further comprises a plurality of sampling guns which are respectively communicated with the input end of the pipeline component, and the output end of the pipeline component is communicated with the input end of the analysis component.
2. A full-section multipoint flue gas constant velocity sampling system according to claim 1 wherein said sampling gun further comprises a purge valve.
3. A full-section multipoint flue gas constant velocity sampling system according to claim 2 wherein each of said duct assemblies includes a duct and a sampling pump mounted on the duct.
4. A full-section multipoint flue gas constant velocity sampling system according to claim 3 wherein the output end of each of said pipes is connected to an analysis unit and said output end of said pipe is further in communication with the input end of a waste drain through a flow control valve.
5. The full-section multipoint flue gas constant velocity sampling system according to claim 4, wherein said flow regulating valve is disposed at the output of the sampling pump.
6. A full-section multipoint flue gas constant velocity sampling system according to claim 5 wherein said pipeline is further provided with a water trap.
7. The full-section multipoint flue gas constant velocity sampling system according to claim 6, wherein a sampling valve is further provided on said pipe.
8. The full-section multipoint flue gas constant-speed sampling system according to claim 1, wherein the analysis component comprises a sample gas mixer, a dehydrator and an analyzer, the output end of the sample gas mixer is communicated with the input end of the analyzer through the dehydrator, the output ends of the plurality of pipeline assemblies are communicated with the input end of the sample gas mixer, and the output end of the sample gas mixer is further communicated with the input end of a sewage draining outlet through a flow regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210271328.1A CN114577548A (en) | 2022-03-18 | 2022-03-18 | Full-section multipoint flue gas constant-speed sampling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210271328.1A CN114577548A (en) | 2022-03-18 | 2022-03-18 | Full-section multipoint flue gas constant-speed sampling system |
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| Publication Number | Publication Date |
|---|---|
| CN114577548A true CN114577548A (en) | 2022-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210271328.1A Withdrawn CN114577548A (en) | 2022-03-18 | 2022-03-18 | Full-section multipoint flue gas constant-speed sampling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115144230A (en) * | 2022-06-20 | 2022-10-04 | 北京杜克泰克科技有限公司 | Multi-inlet multi-outlet gas closed-loop multi-point sampling control device and control method |
-
2022
- 2022-03-18 CN CN202210271328.1A patent/CN114577548A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115144230A (en) * | 2022-06-20 | 2022-10-04 | 北京杜克泰克科技有限公司 | Multi-inlet multi-outlet gas closed-loop multi-point sampling control device and control method |
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Application publication date: 20220603 |