CN211013707U - Grid method gas sampling device - Google Patents
Grid method gas sampling device Download PDFInfo
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- CN211013707U CN211013707U CN201921994061.9U CN201921994061U CN211013707U CN 211013707 U CN211013707 U CN 211013707U CN 201921994061 U CN201921994061 U CN 201921994061U CN 211013707 U CN211013707 U CN 211013707U
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Abstract
A grid method gas sampling device relates to the technical field of flue gas desulfurization and denitration of thermal power plants. This gaseous sampling device of net method includes a plurality of sampling pipes, a plurality of sampling branch pipes and the female pipe of sampling, and a plurality of sampling pipes correspond respectively and locate in a plurality of regions of flue and all have the sampling mouth, and the one end of a plurality of sampling branch pipes is connected with a plurality of sampling pipes respectively, the other end all with the female union coupling of sampling, the female pipe of sampling is used for connecting gaseous check out test set, still is equipped with the sampling valve on the sampling mouth, the sampling valve is used for controlling opening and closing of sampling mouth. The grid method gas sampling device can be used for sampling NH in smoke in any area under the condition of not influencing the sampling of the whole flue3NOx composition measurement to improve ammonia injection regulationAnd (4) contraindication.
Description
Technical Field
The utility model relates to a flue gas desulfurization of thermal power plant, denitration technical field particularly, relate to net method gas sampling device.
Background
In order to control the emission of nitrogen oxides (NOx) which are air pollutants of coal-fired power plants, denitration treatment is required. Wherein, the selective catalysis isThe reduction process (SCR) is the most common denitration method, and a reducing agent (such as NH) is sprayed into flue gas under the action of a catalyst3) Catalytic reduction of NOx in flue gas to N2And H2And O. The NOx content of the denitrated flue gas is continuously analyzed and measured through an automatic flue gas monitoring system after sampling, so that the denitration system can be automatically controlled and monitored in an environment-friendly mode.
At present, denitration export flue gas sampling mainly adopts two kinds of forms, single-point sampling and multiple spot sampling, and in order to make the flue gas sample of getting representative, the multiple spot sampling has gradually replaced traditional single-point sampling. However, the existing multipoint sampling can only adjust the ammonia spraying through the content of NH3 and NOX of the whole cross section of the flue, but for the flue with large length-width ratio, the flue gas data of the multipoint sampling can only represent NH of the whole flue3、NOXAnd the situation that whether the catalytic effect of a certain area reaches the optimal state cannot be known.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a net method gas sampling device, this net method gas sampling device can be under the condition that does not influence the sampling of whole flue, to the NH in arbitrary regional flue gas3NOx, to improve the specificity of ammonia injection regulation.
The embodiment of the utility model is realized like this:
the utility model provides a gaseous sampling device of net method, this gaseous sampling device of net method include a plurality of sampling pipes, a plurality of sampling branch pipes and the female pipe of sampling, and is a plurality of the sampling pipe corresponds respectively in a plurality of regions of locating the flue and all has the sampling mouth, and is a plurality of the one end of sampling branch pipe respectively with a plurality of sampling union coupling, the other end all with the female union coupling of sampling, the female pipe of sampling is used for connecting gas detection equipment, still be equipped with the sampling valve on the sampling mouth, the sampling valve is used for control opening and closing of sampling mouth. The grid method gas sampling device can be used for sampling NH in smoke in any area under the condition of not influencing the sampling of the whole flue3NOx, to improve the specificity of ammonia injection regulation.
Optionally, each sampling tube is provided with at least two sampling nozzles.
Optionally, each sampling pipe is provided with two sampling nozzles, the two sampling nozzles are respectively arranged at two ends of the sampling pipe, and the sampling branch pipes are connected to the pipe body between the two ends of the sampling pipe.
Optionally, the female pipe of sampling includes female pipe body and female pipe branch pipe, female pipe body with a plurality of sampling branch union coupling, female pipe branch pipe connect in female pipe body is kept away from on the lateral wall of sampling branch pipe one end, female pipe body with female pipe branch pipe is linked together, female pipe body is kept away from the one end of sampling branch pipe is closed setting, female pipe branch pipe is used for connecting gaseous check out test set.
Optionally, one end of the main pipe body, which is far away from the sampling branch pipe, is closed through a detachably connected blind flange.
Optionally, an on-off valve is arranged on the main pipe branch pipe and used for controlling the output of the gas of the main pipe branch pipe.
Optionally, the sampling main pipe and the plurality of sampling branch pipes are arranged on the same plane, and the gas source pipe of the sampling valve is arranged on one surface of the plane.
Optionally, the gas source tube is welded to one face of the plane of the grid-method gas sampling apparatus.
Optionally, the gas sampling device further comprises a filter arranged in the gas flow direction in the grid method gas sampling device, and the filter is used for filtering gas.
Optionally, the filter includes a first filter and a second filter, the first filter is disposed at the gas inlet of the sampling pipe, and the second filter is disposed at the gas outlet of the sampling main pipe.
The beneficial effects of the utility model include:
the utility model provides a grid method gas sampling device, because it still is provided with the sampling valve on the sampling mouth on the basis of multiple spot sampling, consequently, can be through opening and closing of control sampling valve to control in the single regionAnd (5) switching on and off the sampling tube. That is to say, the grid method gas sampling device of this application both can carry out the representative sampling to whole flue, can be to the NH in the flue gas in any region again3NOx, to improve the specificity of ammonia injection regulation. Therefore, adopt the gaseous sampling device of grid method of this application can let the operator know the catalytic effect of catalyst on line, adjust denitration entry in real time and spout ammonia volume, reduce pollutant discharge.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a grid method gas sampling device provided by an embodiment of the present invention.
Icon: 100-grid method gas sampling device; 10-a sampling tube; 20-sampling branch pipes; 30-sampling a main pipe; 31-a main pipe body; 311-blind flange; 32-main pipe branch pipe; 321-on-off valve; 40-a sampling valve; 41-air source pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.
Referring to fig. 1, the present embodiment provides a grid method gas sampling apparatus 100, where the grid method gas sampling apparatus 100 includes a plurality of sampling pipes 10, a plurality of sampling branch pipes 20, and a sampling main pipe 30, the sampling pipes 10 are respectively disposed in a plurality of regions of a flue and all have sampling nozzles, one ends of the sampling branch pipes 20 are respectively connected to the sampling pipes 10, and the other ends of the sampling branch pipes are all connected to the sampling main pipe 30, the sampling main pipe 30 is used to connect a gas detection device, the sampling nozzles are further provided with sampling valves 40, and the sampling valves 40 are used to control the sampling nozzles to be opened and closed.
It should be noted that, firstly, the grid method gas sampling apparatus 100 is used for sampling the denitration outlet flue gas of the coal-fired power plant. The grid method gas sampling device 100 is used for sampling NH in smoke in any area on the basis of multipoint sampling3NOx, to improve the specificity of ammonia injection regulation. It should be understood that a plurality of sampling tubes 10 are respectively arranged in the flue, and the plurality of sampling tubes 10 should correspond to a plurality of areas of the cross section of the flue in a one-to-one manner. In this embodiment, the flue cross-section should be equally divided into a plurality of zones.
Secondly, each sampling pipe 10 all corresponds and is connected with the sampling mouth, and the sampling mouth is used for the sampling flue gas, and simultaneously, in this embodiment, all be equipped with sampling valve 40 on each sampling mouth, so, can control opening and closing of every sampling mouth through sampling valve 40. When the sampling nozzle is in a normal state (namely, when the whole flue is sampled), the sampling nozzle is in a normally open state; when the sampling is performed in a subarea (namely, when a certain area is subjected to targeted sampling), only the sampling nozzle of the corresponding area is opened, and other sampling nozzles are closed. Therefore, the method and the device can realize representative sampling of the whole flue and specific sampling of a certain specific area.
Thirdly, one ends of the plurality of sampling branch pipes 20 are respectively connected with the plurality of sampling pipes 10, and the other ends thereof are respectively connected with the sampling main pipe 30. It should be understood that the sampling tube 10, the sampling branch tube 20 and the sampling mother tube 30 should be communicated in sequence. Therefore, the flue gas can sequentially pass through the sampling pipe 10, the sampling branch pipe 20 and the sampling mother pipe 30, and then enters the gas detection equipment, so that the flue gas component detection is realized.
Fourth, in this embodiment, the sampling main pipe 30 is connected to one end of the sampling branch pipes 20, and meanwhile, the sampling main pipe 30 is located in the same plane as the sampling branch pipes 20, so that the space utilization rate of the grid method gas sampling apparatus 100 is higher.
Fifth, in the present embodiment, the sampling main tube 30 and the plurality of sampling branch tubes 20 are disposed on the same plane, and the gas source tube 41 of the sampling valve 40 is disposed on one side of the plane. In this way, the pipelines of the grid gas sampling apparatus 100 can be neater, and the gas source pipe 41 and the pipelines (such as the sampling pipe 10, the sampling branch pipe 20, and the sampling mother pipe 30) do not interfere with each other. For example, the gas source tube 41 may be connected to one surface of the grid gas sampling apparatus 100 by welding.
For example, the opening directions of the sampling nozzles may be arranged in the same direction and perpendicular to the plane where the sampling branch pipes 20 are located, and the gas source pipe 41 of the sampling valve 40 may be correspondingly arranged on the surface of the grid method gas sampling apparatus 100 away from the openings of the sampling nozzles. It should be understood that the opening directions of the sampling nozzles are arranged in the same direction and perpendicular to the plane where the sampling branch pipes 20 are located, which is only one arrangement manner provided in this embodiment, in other embodiments, the opening directions of the sampling nozzles may also be in different directions, or may not be perpendicular to the plane where the sampling branch pipes 20 are located, as long as the normal sampling of the sampling nozzles is not affected, and the air source pipe 41 may be arranged on one surface of the plane where the sampling branch pipes 20 are located.
Sixthly, the sampling valve 40 is composed of a valve plate, a piston rod, a piston, a cylinder, a spring and an end cover, wherein the valve plate is connected with the piston rod, the piston rod is connected with the piston, the piston reciprocates in the cylinder, and the spring is connected with the piston to reset the piston under the condition of no air source. The opening and closing of the sampling tube 10 is controlled by a valve plate. Therefore, compressed air is sent to the sampling valve 40 through the air source pipe 41, and the compressed air enters the cylinder of the sampling valve 40 and then drives the piston to move, so that the valve plate is driven to displace, and the purpose of switching on and off the sampling nozzle is achieved.
In summary, the grid method gas provided by the present applicationThe body sampling device 100, which is based on multi-point sampling, is further provided with a sampling valve 40 on the sampling nozzle, so that the opening and closing of the sampling valve 40 can be controlled, and the on and off of the sampling tube 10 in a single area can be controlled. That is to say, the grid method gas sampling device 100 of the present application can not only perform representative sampling on the whole flue, but also perform NH in the flue gas in any area3NOx, to improve the specificity of ammonia injection regulation. Therefore, the grid method gas sampling device 100 can enable an operator to know the catalytic effect of the catalyst on line, adjust the ammonia spraying amount of the denitration inlet in real time and reduce pollutant emission.
Further, in the present embodiment, at least two sampling nozzles are provided on each sampling tube 10. Illustratively, there may be two sampling nozzles, three sampling nozzles, or four sampling nozzles, etc. When two sampling nozzles are arranged on the sampling tube 10, the two sampling nozzles can be respectively arranged at two ends of the sampling tube 10, and the sampling branch tube 20 is connected to the tube body between two ends of the sampling tube 10. Thus, equidistant sampling can be realized, and the sampled data is better.
In order to prevent the condensation of the pipe wall caused by low temperature, the accumulated water can be quickly discharged. In this embodiment, female pipe 30 of sampling includes female pipe body 31 and female pipe branch 32, and female pipe body 31 is connected with a plurality of sampling branch pipes 20, and female pipe branch 32 is connected on the lateral wall of female pipe body 31 keeping away from sampling branch pipe 20 one end, and female pipe body 31 is linked together with female pipe branch 32, and female pipe body 31 keeps away from the one end of sampling branch pipe 20 and is the closed setting, and female pipe branch 32 is used for connecting gaseous check out test set. Like this, female pipe body 31 is similar Y type with female pipe branch 32 just wholly, in the use, with the pipeline slope, ponding just can flow out fast through the pipe section that inclines to prevent to a certain extent that water and pollutant from taking place chemical reaction and influencing the measurement parameter value.
It should be understood that the end of the main body 31 away from the sampling branch pipe 20 is closed only to prevent the gas from flowing out of the end of the main body 31 away from the sampling branch pipe 20, which may cause contamination, etc. The closing relation can be a non-detachable closed state directly or can be covered by a foreign object. In this embodiment, a foreign object is used for detachable closure.
Illustratively, the end of the parent tube body 31 remote from the sampling branch tube 20 is closed by a removably attached blind flange 311. The arrangement is that in order to facilitate the dust cleaning treatment of the sampling main pipe 30, when the dust is cleaned, the blind flange 311 is opened by disassembling four sets of bolts on the blind flange 311, and a special dust cleaning tool is used for cleaning the inside of the sampling main pipe 30.
In order to facilitate the effective control of the gas output from the sampling main pipe 30, in this embodiment, the main pipe branch pipe 32 is provided with an on-off valve 321, and the on-off valve 321 is used for controlling the gas output from the main pipe branch pipe 32.
In this embodiment, in order to prevent the grid method gas sampling apparatus 100 from being blocked by the dust in the flue gas, the grid method gas sampling apparatus 100 of the present application further includes a filter disposed in the grid method gas sampling apparatus 100 in the gas flowing direction, and the filter is used for filtering the gas. The filter can further keep the inside cleanness of the sampling device, and prevents the smoke from entering the upstream device of the comprehensive grid method gas sampling device 100 when the smoke enters the sampling device and the smoke is brought into the upstream device.
Specifically, the filter includes a first filter and a second filter, the first filter is disposed at the air inlet of the sampling pipe 10, and the second filter is disposed at the air outlet of the sampling main pipe 30. It should be understood that the first filter and the second filter are respectively disposed at the air inlet and the air outlet in the present application for the purpose of keeping track of the air inlet and the air outlet, that is, the filters can only be disposed here, and in other embodiments, the arrangement positions can be adjusted appropriately.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (10)
1. The utility model provides a gaseous sampling device of net method, its characterized in that, includes the female pipe of a plurality of sampling pipes, a plurality of sampling branch pipes and sampling, and is a plurality of the sampling pipe corresponds respectively and locates in a plurality of regions of flue and all has the sampling mouth, and is a plurality of the one end of sampling branch pipe respectively with a plurality of sampling union coupling, the other end all with the female union coupling of sampling, the female pipe of sampling is used for connecting gaseous check out test set, still be equipped with the sampling valve on the sampling mouth, the sampling valve is used for control opening and closing of sampling mouth.
2. The grid method gas sampling device according to claim 1, wherein each sampling tube is provided with at least two sampling nozzles.
3. The grid method gas sampling device according to claim 2, wherein each sampling tube is provided with two sampling nozzles, the two sampling nozzles are respectively arranged at two ends of the sampling tube, and the sampling branch tube is connected to the tube body between the two ends of the sampling tube.
4. The grid method gas sampling device according to claim 1, wherein the sampling main pipe comprises a main pipe body and a main pipe branch pipe, the main pipe body is connected with a plurality of sampling branch pipes, the main pipe branch pipe is connected to a side wall of the main pipe body, which is far away from one end of each sampling branch pipe, the main pipe body is communicated with the main pipe branch pipe, one end of the main pipe body, which is far away from the sampling branch pipe, is in a closed arrangement, and the main pipe branch pipe is used for connecting the gas detection equipment.
5. The grid method gas sampling device according to claim 4, wherein an end of the main pipe body away from the sampling branch pipe is closed by a detachably connected blind flange.
6. The grid method gas sampling device according to claim 4, wherein the main pipe branch pipe is provided with an on-off valve for controlling the output of the gas of the main pipe branch pipe.
7. The grid method gas sampling device according to claim 1, wherein the sampling main pipe and the plurality of sampling branch pipes are arranged on the same plane, and the gas source pipe of the sampling valve is arranged on one surface of the plane.
8. The grid gas sampling device according to claim 7, wherein the gas source tube is welded to one face of the planar face of the grid gas sampling device.
9. The grid method gas sampling device according to claim 1, further comprising a filter disposed in a gas flow direction within the grid method gas sampling device, the filter for filtering gas.
10. The grid method gas sampling device according to claim 9, wherein the filter comprises a first filter and a second filter, the first filter is arranged at the gas inlet of the sampling pipe, and the second filter is arranged at the gas outlet of the sampling main pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921994061.9U CN211013707U (en) | 2019-11-18 | 2019-11-18 | Grid method gas sampling device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921994061.9U CN211013707U (en) | 2019-11-18 | 2019-11-18 | Grid method gas sampling device |
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| CN211013707U true CN211013707U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544274A (en) * | 2022-02-25 | 2022-05-27 | 北京建筑材料科学研究总院有限公司 | Nitrogen oxide collecting device for cement production |
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2019
- 2019-11-18 CN CN201921994061.9U patent/CN211013707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544274A (en) * | 2022-02-25 | 2022-05-27 | 北京建筑材料科学研究总院有限公司 | Nitrogen oxide collecting device for cement production |
| CN114544274B (en) * | 2022-02-25 | 2023-10-31 | 北京建筑材料科学研究总院有限公司 | Nitrogen oxide collecting device for cement production |
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