CN220238248U - Unit spouts ammonia monitoring devices - Google Patents
Unit spouts ammonia monitoring devices Download PDFInfo
- Publication number
- CN220238248U CN220238248U CN202321053862.1U CN202321053862U CN220238248U CN 220238248 U CN220238248 U CN 220238248U CN 202321053862 U CN202321053862 U CN 202321053862U CN 220238248 U CN220238248 U CN 220238248U
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- CN
- China
- Prior art keywords
- flue gas
- wall
- gas pipeline
- shunt tubes
- ammonia
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 81
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 34
- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000003546 flue gas Substances 0.000 claims abstract description 76
- 238000005070 sampling Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract description 13
- 238000005507 spraying Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 5
- 230000006978 adaptation Effects 0.000 abstract description 3
- 235000011114 ammonium hydroxide Nutrition 0.000 description 11
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 9
- 239000000779 smoke Substances 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to the technical field of flue gas denitration, in particular to an ammonia spraying monitoring device of a unit. The technical proposal comprises: flue gas pipeline, shunt tubes, spout pipe, collecting pipe and guard plate, the shunt tubes that equidistance was distributed are pegged graft to flue gas pipeline inner wall one side, the shunt tubes runs through flue gas pipeline one side outer wall and peg graft and install the collecting pipe, the sampling tube of equidistance parallel distribution is pegged graft and is installed to shunt tubes one side outer wall, shunt tubes deviate from sampling tube one side outer wall and are provided with the guard plate, flue gas pipeline inner wall one side is provided with the access hole, through setting up shunt tubes, guard plate and flow control valve, has reached the effect that improves denitration quality, guarantees the proportion looks adaptation between aqueous ammonia or ammonia and the flue gas to guarantee the denitration quality of flue gas, reduce the use of aqueous ammonia or ammonia, reduce denitration cost.
Description
Technical Field
The utility model relates to the technical field of flue gas denitration, in particular to an ammonia spraying monitoring device of a unit.
Background
The importance of the process of removing nitrogen oxides from combustion flue gas to prevent environmental pollution has been sharply proposed as a worldwide problem. The main processes in the world are divided into: SCR and SNCR. The two processes are not very different except that the reaction temperature is lower than SNCR because the SCR uses a catalyst, and in the process of SCR denitration, ammonia water or ammonia gas is sprayed to react with the flue gas, so that the purpose of flue gas denitration is achieved.
When the unit operates, the load change is large, the coal variety suddenly changes, and an operator manually adjusts the ammonia vapor flow regulating valve of the reactor according to the concentration of NOx at the outlet of the SCR. The NOx distribution of the denitration inlet is uneven, so that the measured data of the NOx concentration of the SCR inlet and outlet and the ammonia slip of the SCR outlet are not representative, the total ammonia injection amount can only be determined according to the NOx concentration of the denitration inlet and outlet in the traditional ammonia injection mode, the ammonia injection can not be performed in a targeted mode according to the uneven condition of the NOx in the denitration system, the ammonia injection amount is regulated only according to the partial NOx concentration of the SCR outlet, the ammonia injection control hysteresis is serious, the NOx of the chimney inlet is often subjected to instantaneous exceeding, the manual ammonia addition is often oversprayed, and the real-time numerical fluctuation of the NOx of the denitration outlet is large.
Disclosure of Invention
The utility model aims to provide an ammonia spraying monitoring device for a unit, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides an ammonia monitoring devices is spouted to unit, includes flue gas pipeline, shunt tubes, spout pipe, collecting pipe and guard plate, the shunt tubes that the equidistance was distributed are installed in grafting of flue gas pipeline inner wall one side, the shunt tubes runs through flue gas pipeline one side outer wall and installs the collecting pipe in grafting, the sampling tube of equidistance parallel distribution is installed in grafting of shunt tubes one side outer wall, shunt tubes deviate from sampling tube one side outer wall and are provided with the guard plate, flue gas pipeline inner wall one side is provided with the access hole.
When the unit ammonia spraying monitoring device in the technical scheme is used, flue gas flows in a flue gas pipeline, ammonia water or ammonia gas is mixed with the flue gas through a spraying pipe, and the flue gas reacts through a catalyst, so that the flue gas is out of stock, the flue gas after the out of stock is sampled through a sampling pipe, hydroxide and oxygen components are detected through a first detection device, ammonia escape quantity is detected through a second detection device, the concentration distribution condition of the hydroxide can be obtained, and the spraying quantity of the ammonia water or ammonia gas can be controlled by a flow control valve.
Preferably, catalysts distributed in parallel at equal intervals are arranged on one side of the inner wall of the flue gas pipeline, and the number of the catalysts is three-layer. The catalyst can promote the reducing agent to react with nitrogen oxides in the flue gas at a certain temperature.
Preferably, the spraying pipes which are distributed in parallel at equal intervals are inserted and installed on one side of the inner wall of the flue gas pipeline, and the spraying pipes penetrate through the outer wall of one end of the flue gas pipeline to be provided with flow control valves. Ammonia water or ammonia gas is sprayed out through a spraying pipe under the control of a flow control valve and is mixed with smoke in a smoke pipeline.
Preferably, the outer wall of the lower end of the collecting pipe is inserted and installed inside the flue gas pipeline, and the outer walls of the two sides of the collecting pipe are respectively provided with a first detection device and a second detection device. The sampling tube samples the inside flue gas of flue gas pipeline to inside through shunt tubes and collection pipe backward flow to flue gas pipeline, the flue gas is at the flow in-process, is detected by first detection device and second detection device.
Preferably, the connecting rod is installed to guard plate outer wall, pass through connecting rod interconnect between the guard plate. The connecting rod ensures the interconnection between the protection plates.
Preferably, bolts are arranged on two sides of the outer wall of the protection plate, and the protection plate is connected with the inner wall of the flue gas pipeline through the bolts. The bolt has reached the purpose of fixed guard plate, has guaranteed the position stability that the guard plate is located the shunt tubes outside, has guaranteed the guard plate and has divided the protection effect of flow tubes.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, the effect of improving denitration quality is achieved by arranging the shunt tubes, the protection plates and the flow control valves, the flue gas flows in the flue gas pipeline, ammonia water or ammonia gas is mixed with the flue gas through the spray tubes, and the flue gas reacts through the catalyst, so that the flue gas is out of stock, the flue gas after out of stock is sampled through the sampling tube, the hydroxide and oxygen components are detected through the first detection device, the ammonia escape quantity is detected through the second detection device, the concentration distribution condition of the hydroxide can be known, the spray quantity of the ammonia water or ammonia gas can be controlled by matching with the flow control valves, so that the proportion adaptation between the ammonia water or ammonia gas and the flue gas is ensured, the out-stock quality of the flue gas is ensured, the use of the ammonia water or ammonia gas is reduced, and the denitration cost is reduced.
Drawings
FIG. 1 is a schematic cross-sectional view of a flue gas duct structure of the present utility model;
FIG. 2 is an enlarged schematic view of the manifold structure of the present utility model;
fig. 3 is a schematic top view of a shunt tube structure of the present utility model;
fig. 4 is an enlarged view of a portion of the shielding plate structure of fig. 3 according to the present utility model.
In the figure: 1. a flue gas duct; 11. a discharge pipe; 12. a flow control valve; 13. a catalyst; 14. an access opening; 2. a shunt; 21. a manifold; 22. a first detection device; 23. a second detection device; 24. a protection plate; 25. a connecting rod; 26. a bolt; 27. and (5) a sampling tube.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, 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.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 4, two embodiments of the present utility model are provided:
embodiment one: the utility model provides an ammonia monitoring devices is spouted to unit, including flue gas pipeline 1, shunt tubes 2, spout pipe 11, collecting pipe 21 and guard plate 24, flue gas pipeline 1 inner wall one side grafting is installed the shunt tubes 2 that the equidistance was distributed, and shunt tubes 2 run through flue gas pipeline 1 one side outer wall grafting and are installed collecting pipe 21, and the sampling tube 27 of equidistance parallel distribution is installed in the grafting of shunt tubes 2 one side outer wall, and shunt tubes 2 deviate from sampling tube 27 one side outer wall and are provided with guard plate 24, and flue gas pipeline 1 inner wall one side is provided with access hole 14.
The catalyst 13 which is distributed in parallel at equal intervals is arranged on one side of the inner wall of the flue gas pipeline 1, and the number of the catalyst 13 adopts three-layer design. The catalyst 13 is capable of causing the reducing agent to selectively react chemically with nitrogen oxides in the flue gas at a certain temperature.
The flue gas pipeline 1 inner wall one side grafting is installed equidistant parallel distribution's blowout pipe 11, and blowout pipe 11 runs through flue gas pipeline 1 one end outer wall and is provided with flow control valve 12. Ammonia water or ammonia gas is sprayed out through the spraying pipe 11 under the control of the flow control valve 12 and is mixed with the smoke gas in the smoke gas pipeline 1, the smoke gas flows in the smoke gas pipeline 1, the ammonia water or ammonia gas is mixed with the smoke gas through the spraying pipe 11, and the smoke gas reacts through the catalyst 13, so that the smoke gas is de-pinned.
Embodiment two: the utility model provides an ammonia monitoring devices is spouted to unit, including flue gas pipeline 1, shunt tubes 2, spout pipe 11, collecting pipe 21 and guard plate 24, flue gas pipeline 1 inner wall one side grafting is installed the shunt tubes 2 that the equidistance was distributed, shunt tubes 2 run through flue gas pipeline 1 one side outer wall grafting and are installed collecting pipe 21, the sampling tube 27 of equidistance parallel distribution is installed in the grafting of shunt tubes 2 one side outer wall, shunt tubes 2 deviate from sampling tube 27 one side outer wall and are provided with guard plate 24, flue gas pipeline 1 inner wall one side is provided with access hole 14, the staff can dismantle bolt 26 through access hole 14, thereby change guard plate 24, guarantee the protection effect of guard plate 24 to shunt tubes 2.
The flue gas pipeline 1 inner wall one side grafting is installed equidistant parallel distribution's blowout pipe 11, and blowout pipe 11 runs through flue gas pipeline 1 one end outer wall and is provided with flow control valve 12. Ammonia water or ammonia gas is sprayed out through the spraying pipe 11 under the control of the flow control valve 12 and is mixed with the flue gas in the flue gas pipeline 1.
The outer walls of the lower ends of the collecting pipes 21 are inserted and installed inside the flue gas pipeline 1, and the outer walls of the two sides of the collecting pipes 21 are respectively provided with a first detection device 22 and a second detection device 23. The sampling tube 27 samples the flue gas in the flue gas duct 1 and flows back to the flue gas duct 1 through the shunt tube 2 and the collecting tube 21, and the flue gas is detected by the first detecting device 22 and the second detecting device 23 in the flowing process.
The connecting rod 25 is installed to guard plate 24 outer wall, connects through connecting rod 25 between the guard plate 24. The connecting rods 25 ensure the interconnection between the protection plates 24.
Bolts 26 are arranged on two sides of the outer wall of the protection plate 24, and the protection plate 24 is connected with the inner wall of the flue gas pipeline 1 through the bolts 26. The purpose of fixed guard plate 24 has been reached to bolt 26, the position stability that guard plate 24 is located shunt tubes 2 outside has been guaranteed, the protection effect of shunt tubes 2 has been guaranteed to guard plate 24, the flue gas after the pin removal is through sampling tube 27 to the flue gas is detected hydroxide and oxygen composition through first detection device 22, and detect the ammonia escape volume through second detection device 23, can learn the concentration distribution situation of hydroxide, and can cooperate flow control valve 12 control ammonia or the jet-out volume of ammonia, thereby guarantee the proportion looks adaptation between ammonia or ammonia and the flue gas, thereby guarantee the pin removal quality of flue gas, reduce the use of ammonia or ammonia, reduce denitration cost.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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.
Claims (6)
1. The utility model provides a unit spouts ammonia monitoring devices, includes flue gas pipeline (1), shunt tubes (2), blowout pipe (11), collecting pipe (21) and guard plate (24), its characterized in that: the utility model discloses a flue gas pipeline (1) inner wall one side grafting is installed equidistance shunt tubes (2) that distribute, shunt tubes (2) are run through flue gas pipeline (1) one side outer wall grafting and are installed collecting tube (21), shunt tubes (2) one side outer wall grafting is installed equidistance parallel distribution's sampling tube (27), shunt tubes (2) deviate from sampling tube (27) one side outer wall and are provided with guard plate (24), flue gas pipeline (1) inner wall one side is provided with access hole (14).
2. The unit ammonia injection monitoring device of claim 1, wherein: the flue gas pipeline (1) inner wall one side is installed equidistant parallel distribution's catalyst (13), the quantity of catalyst (13) adopts three-layer design.
3. The unit ammonia injection monitoring device of claim 1, wherein: the flue gas pipeline (1) inner wall one side grafting is installed equidistance parallel distribution's blowout pipe (11), blowout pipe (11) are provided with flow control valve (12) through flue gas pipeline (1) one end outer wall.
4. The unit ammonia injection monitoring device of claim 1, wherein: the outer walls of the lower ends of the collecting pipes (21) are inserted and installed inside the flue gas pipeline (1), and the outer walls of the two sides of the collecting pipes (21) are respectively provided with a first detection device (22) and a second detection device (23).
5. The unit ammonia injection monitoring device of claim 1, wherein: connecting rods (25) are arranged on the outer walls of the protection plates (24), and the protection plates (24) are connected with each other through the connecting rods (25).
6. The unit ammonia injection monitoring device of claim 1, wherein: bolts (26) are arranged on two sides of the outer wall of the protection plate (24), and the protection plate (24) is connected with the inner wall of the flue gas pipeline (1) through the bolts (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321053862.1U CN220238248U (en) | 2023-05-05 | 2023-05-05 | Unit spouts ammonia monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321053862.1U CN220238248U (en) | 2023-05-05 | 2023-05-05 | Unit spouts ammonia monitoring devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220238248U true CN220238248U (en) | 2023-12-26 |
Family
ID=89231787
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321053862.1U Active CN220238248U (en) | 2023-05-05 | 2023-05-05 | Unit spouts ammonia monitoring devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220238248U (en) |
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2023
- 2023-05-05 CN CN202321053862.1U patent/CN220238248U/en active Active
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