CN213580296U - Flue gas multipoint mixing and sampling device of supercritical unit denitration system - Google Patents
Flue gas multipoint mixing and sampling device of supercritical unit denitration system Download PDFInfo
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- CN213580296U CN213580296U CN202021967260.3U CN202021967260U CN213580296U CN 213580296 U CN213580296 U CN 213580296U CN 202021967260 U CN202021967260 U CN 202021967260U CN 213580296 U CN213580296 U CN 213580296U
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Abstract
A multi-point mixed sampling device for flue gas of a denitration system of a supercritical unit comprises a shell, a wing hole, a sampling protection tube, a main purging pipeline, a heating wire, a sampling filter, a protection tube purging pipeline, a sampling filter purging pipeline and a sampling filter, and is characterized in that the overall shape of the shell is similar to the shape of an airplane, the sampling protection tube is arranged in the shell and is concentric with the shell, the upper end of the sampling protection tube is in an open form, the heating wire is uniformly surrounded on the surface of the sampling protection tube, the two main purging pipelines are respectively arranged between the sampling protection tube and the shell, the two main purging pipelines and the sampling protection tube are concentrically arranged, the top of each main purging pipeline is provided with two branches, one branch points to the wing of the shell, the other branch points to the head of the shell, and each main purging pipeline is provided with a plurality of protection tube purging, each protection tube purging pipeline is arranged between the main purging pipeline and the sampling protection tube.
Description
Technical Field
The utility model discloses a supercritical unit deNOx systems flue gas multiple spot mixes sampling device belongs to denitration technical equipment field.
Background
During operation of a denitration system of a coal-fired boiler, inaccurate measurement of a flue gas analyzer (usually shown as large data fluctuation and atypical variation trend) is one of the main reasons for frequent automatic quitting and low automatic input rate of denitration. The automatic denitration cannot be put into use, so that the operation cost is increased without any doubt, and the emission index of the nitrogen oxide cannot be completely qualified.
At present, a denitration flue gas analyzer of each coal-fired boiler mostly adopts single-point sampling, and due to the fact that the cross-sectional area of a flue at the outlet of an SCR reactor is large, ammonia nitrogen in the reactor is not uniformly reacted, the concentration distribution of NOx in flue gas at the corresponding outlet is not uniform, and the representative sample gas obtained by a sampling pipe can not be guaranteed through single-point sampling measurement. And because the change of the coal type is big in the flue, the flying ash in the flue is more, and single-point causes the sampling device to block up easily, can not effective sample to the shortcoming that denitration flue gas analyzer measured data fluctuation is big frequently appears, and the trend of change is atypical seriously appears the environmental protection data condition that exceeds standard.
Due to the fact that the original sampling position and the original sampling method have great defects, sampling is inaccurate, untimely and atypical, so that factors such as singleness, hysteresis, uncertainty and the like exist in a flue gas sample, the related data of denitration has many abnormal conditions, automatic investment cannot be carried out for a long time, and further loss of manpower and material resources is caused. The defects of the sampling position and the sampling mode method are that the denitration sampling point is before the tail flue air preheater and is not subjected to dust removal equipment such as electric dust removal equipment, so that the dust amount is particularly large, important equipment such as a sampling pipeline, a probe and a pipeline is blocked, and related equipment cannot accurately and timely reflect environment-friendly data. Similarly, the entering of much dust can cause the blockage of a filter, the damage of a refrigerator, the non-operation of a sampling pump and other maintenance and replacement work of a large amount of equipment, and particularly, the abnormity of environmental protection data causes relevant adverse effects.
SUMMERY OF THE UTILITY MODEL
In order to solve the defect of flue gas sampling device ubiquitous, the utility model provides a supercritical unit deNOx systems flue gas multiple spot mixes sampling device.
The utility model discloses a solve the technical scheme that technical problem adopted as follows:
a multi-point mixed sampling device for flue gas of a denitration system of a supercritical unit comprises a shell, a wing hole, a sampling protection tube, a main purging pipeline, a heating wire, a sampling filter, a protection tube purging pipeline and a sampling filter purging pipeline, and is characterized in that the overall shape of the shell is similar to the shape of an airplane, the sampling protection tube is arranged in the shell and is concentric with the shell, the upper end of the sampling protection tube is in an open form, the heating wire is uniformly surrounded on the surface of the sampling protection tube, the two main purging pipelines are respectively arranged between the sampling protection tube and the shell, the two main purging pipelines and the sampling protection tube are concentrically arranged, the top of each main purging pipeline is provided with two branches, one branch points to the wing of the shell, the other branch points to the head of the shell, each main purging pipeline is provided with a plurality of protection tube purging pipelines and, each protection tube purging pipeline is arranged between the main purging pipeline and the sampling protection tube, each sampling filter purging pipeline penetrates through a hole in the sampling protection tube to reach the inside of the sampling protection tube, and the purging pipelines of each pair of protection tubes and the sampling filter purging pipelines are different in height, so that each pair of protection tube purging pipeline and each pair of sampling filter purging pipeline can well remove dust of the sampling protection tube and the sampling filter; the sampling filter is arranged in the sampling protection tube and is concentric with the sampling protection tube, the sampling filter is a nickel alloy shell, the surface of the sampling filter is provided with uniform and extremely small holes which are invisible to naked eyes, but the sampling filter can feel by touch, and the holes are smaller than dust in the air so as to filter the dust in smoke; the sampling filter is connected with the sampling pump, and each main purging pipeline is connected with the compressed air pipeline.
The utility model discloses the beneficial effect who reaches is: 1. the measured NOx value by multipoint sampling is more representative, the denitration capability is more accurately grasped, and after comparison, the denitration data change interval is small, and the denitration effect is better; 2. the method can ensure that the flow of the flue gas is stably ensured before each overhaul period, the flow does not fluctuate in a large range, the data measurement is accurate, and the automatic denitration investment is facilitated; 3. the replacement rate of spare parts of equipment is reduced, the personnel maintenance time is reduced, the equipment can be ensured to run for a long period, and the production operation safety is improved.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. a housing; 2. a wing hole; 3. a sampling protection tube; 4. a main purge line; 5. Heating wires; 6. a sampling filter; 7. protecting a tube purging pipeline; 8. the sampling filter purges the pipeline.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
As shown in figure 1, a multi-point mixed sampling device for flue gas of a denitration system of a supercritical unit, which comprises a shell 1, a wing hole 2, a sampling protection tube 3, a main purging pipeline 4, a heating wire 5, a sampling filter 6, a protection tube purging pipeline 7 and a sampling filter purging pipeline 8, and is characterized in that the overall shape of the shell 1 is similar to the shape of an airplane, the sampling protection tube 3 is arranged in the shell 1 and is concentric with the shell, the upper end of the sampling protection tube 3 is in an open form, the heating wire 5 is uniformly surrounded on the surface of the sampling protection tube 3, the two main purging pipelines 4 are respectively arranged between the sampling protection tube 3 and the shell 1, the two main purging pipelines 4 and the sampling protection tube 3 are concentrically arranged, the top of each main purging pipeline 4 is provided with two branches, one branch points to the wing of the shell, the other branch points to the head of the shell, each main purging pipeline 4 is provided with a plurality of protection tube purging 8, each protection tube purging pipeline 7 is arranged between the main purging pipeline 4 and the sampling protection tube 3, 8 pipelines of each sampling filter purging pipeline penetrate through holes in the sampling protection tubes to reach the inside of the sampling protection tubes 3, and the purging pipelines 7 and 8 of each pair of protection tubes are different in height so as to ensure that each pair of the purging pipelines 7 and 8 of the protection tubes and the sampling filters can well remove dust of the sampling protection tubes 3 and the sampling filters 6; the sampling filter 6 is arranged in the sampling protection tube and is concentric with the sampling protection tube, the sampling filter 6 is a nickel alloy shell, the surface of the sampling filter is provided with uniform and extremely small holes which are invisible to naked eyes, but the sampling filter can feel by touch, and the holes are smaller than dust in the air so as to filter the dust in the smoke; the sampling filter 6 is connected with the sampling pump, and each main purging pipeline 4 is connected with the compressed air pipeline.
The working principle is as follows: the flue gas enters from the flying wing hole 2 on the surface of the shell 1, the flying wing hole 2 is a first layer for filtering, part of dust in the flue gas is filtered, the part of dust reaches the sampling filter 6 through the opening of the sampling protection tube 3, the dust in the flue gas can be prevented from entering the sampling filter 6 by the tiny hole on the surface of the sampling filter 6, and finally, the filtered flue gas is subjected to sampling pump operation, so that a large amount of dust is gathered at the hole on the surface of the sampling filter 6; every certain time, the compressed air pipeline blows air to each main blowing pipeline 4, each protection pipe blowing pipeline 7 performs dust removal treatment on the sampling protection pipe 3 and the heating wire 5, each sampling filter blowing pipeline 8 performs dust removal treatment on the sampling filter 6, two branches at the top of each main blowing pipeline 4 perform dust removal treatment on the wing of the shell and the head of the shell respectively, and the heating wire 5 is used for removing water vapor in smoke.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A multi-point mixed sampling device for flue gas of a denitration system of a supercritical unit comprises a shell, a wing hole, a sampling protection tube, a main purging pipeline, a heating wire, a sampling filter, a protection tube purging pipeline and a sampling filter purging pipeline, and is characterized in that the overall shape of the shell is similar to the shape of an airplane, the sampling protection tube is arranged in the shell and is concentric with the shell, the upper end of the sampling protection tube is in an open form, the heating wire is uniformly surrounded on the surface of the sampling protection tube, the two main purging pipelines are respectively arranged between the sampling protection tube and the shell, the two main purging pipelines and the sampling protection tube are concentrically arranged, the top of each main purging pipeline is provided with two branches, one branch points to the wing of the shell, the other branch points to the head of the shell, each main purging pipeline is provided with a plurality of protection tube purging pipelines and, each protection tube purging pipeline is arranged between the main purging pipeline and the sampling protection tube, each sampling filter purging pipeline penetrates through a hole in the sampling protection tube to reach the inside of the sampling protection tube, and the purging pipelines of each pair of protection tubes and the sampling filter purging pipelines are different in height, so that each pair of protection tube purging pipeline and each pair of sampling filter purging pipeline can well remove dust of the sampling protection tube and the sampling filter; the sampling filter is arranged in the sampling protection tube and is concentric with the sampling protection tube, the sampling filter is a nickel alloy shell, the surface of the sampling filter is provided with uniform and extremely small holes which are invisible to naked eyes, but the sampling filter can feel by touch, and the holes are smaller than dust in the air so as to filter the dust in smoke; the sampling filter is connected with the sampling pump, and each main purging pipeline is connected with the compressed air pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021967260.3U CN213580296U (en) | 2020-09-10 | 2020-09-10 | Flue gas multipoint mixing and sampling device of supercritical unit denitration system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021967260.3U CN213580296U (en) | 2020-09-10 | 2020-09-10 | Flue gas multipoint mixing and sampling device of supercritical unit denitration system |
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| CN213580296U true CN213580296U (en) | 2021-06-29 |
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| CN202021967260.3U Active CN213580296U (en) | 2020-09-10 | 2020-09-10 | Flue gas multipoint mixing and sampling device of supercritical unit denitration system |
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Effective date of registration: 20211018 Address after: 130501 Jiutai Zhaoxu Energy Industrial Park, Jiutai City, Changchun City, Jilin Province Patentee after: HUANENG JILIN POWER GENERATION Co.,Ltd. JIUTAI ELECTRIC FACTORY Address before: No.1427, Pingquan Road, Nanguan District, Changchun City, Jilin Province 130000 Patentee before: Zhang Yan |