CN215962976U - Anti-blocking ammonia spraying branch pipe purging device for SCR denitration system - Google Patents
Anti-blocking ammonia spraying branch pipe purging device for SCR denitration system Download PDFInfo
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- CN215962976U CN215962976U CN202121764391.6U CN202121764391U CN215962976U CN 215962976 U CN215962976 U CN 215962976U CN 202121764391 U CN202121764391 U CN 202121764391U CN 215962976 U CN215962976 U CN 215962976U
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Abstract
The utility model relates to an anti-blocking ammonia spraying branch pipe purging device of an SCR (selective catalytic reduction) denitration system, wherein a plurality of groups of rapping components are arranged in an ammonia spraying branch pipe of the device, a rapping motor of the rapping components transmits vibration force to an arc-shaped rapping plate through a vibrating rod, and the plurality of arc-shaped rapping plates are close to the side wall of the ammonia spraying branch pipe, so that the arc-shaped rapping plate can rapidly vibrate and is in contact with the side wall of the ammonia spraying branch pipe to break and loosen ash scale adhered to the side wall of the ammonia spraying branch pipe; the device has solved and has spouted the problem that the ammonia branch pipe content easily glues the ash dirt and causes the jam, has guaranteed the degree of consistency that the ammonia nitrogen mixes, improves denitration efficiency, reduces ammonia escape.
Description
Technical Field
The utility model relates to the technical field of anti-blocking devices, in particular to an anti-blocking ammonia spraying branch pipe blowing device for an SCR (selective catalytic reduction) denitration system.
Background
Selective Catalytic Reduction (SCR) flue gas denitration technology is widely applied to coal-fired power plants as an efficient NOx control technology. The reducing agent mainly comprises urea, liquid ammonia and ammonia water. The working principle is as follows: after the ammonia is prepared by the hydrolysis method and the pyrolysis method, the ammonia and hot air blown by a dilution fan are mixed in an ammonia air mixer and then reach an ammonia air mixing large header, and finally reach an ammonia injection system. At the SCR inlet flue, the ejected ammonia gas and the flue gas from the outlet of the boiler economizer are mixed and then enter an SCR reactor (the reactor is arranged between the boiler economizer and an air preheater), denitration reaction is carried out through a catalyst, and finally the denitration purpose is achieved from the outlet flue to the boiler air preheater.
The ammonia injection branch pipe is used as the only connecting piece of the ammonia-air mixing large header and the ammonia injection grid, the operation state of the ammonia injection branch pipe determines the amount of a reducing agent entering the first layer of catalyst, and the denitration efficiency is directly influenced. In order to obtain a more ideal ammonia mixing effect, the number of the ammonia injection branch pipes is more and the diameter is smaller, when the branch pipe valve is kept to operate at a low opening degree for a long time, the flow rate of the branch pipe is too low, and under the environment with low flue gas temperature, non-pyrolyzed urea crystals or a hydrolysis system in the ammonia injection branch pipes is easy to be adhered to with dust in primary air and dust in flue gas, and finally adsorbed on the inner wall surface of the ammonia injection branch pipe, so that the ammonia injection branch pipe is blocked. After the spray tube is blocked up, the even degree that the ammonia nitrogen mixes has seriously been influenced, and then reduces denitration efficiency, and the increase ammonia escapes.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides an anti-blocking ammonia spraying branch pipe blowing device for an SCR denitration system.
The technical scheme of the utility model is as follows: the utility model provides a SCR deNOx systems prevents stifled type and spouts ammonia branch pipe and sweep device, including installing sweeping the subassembly and shaking the subassembly, characterized by in the circular ammonia branch pipe that spouts:
the vibration component comprises a plurality of arc vibration plates with the same size and a vibration motor, the arc vibration plates are correspondingly sleeved in the ammonia spraying branch pipe, a certain gap is formed between the arc vibration plates and the ammonia spraying branch pipe, the radian of each arc vibration plate is less than 120 degrees, a vibration rod is fixedly connected to the middle of the outer side surface of each arc vibration plate along the radial direction, a plurality of through holes are uniformly distributed on the side wall of the ammonia spraying branch pipe along the circumferential direction, the number of the through holes is the same as that of the arc vibration plates, the plurality of radial vibration rods respectively extend outwards from the plurality of through holes, and the end parts of the extending radial vibration rods are fixedly connected with the vibration motor;
the subassembly that sweeps sweep the shower nozzle including flexible bracing piece, high-pressurepipe, efflux type, flexible bracing piece is coaxial to be set up in spouting the ammonia branch pipe, the efflux type sweeps shower nozzle fixed connection and stretches out and fix at the flexible end of flexible bracing piece, the stiff end of flexible bracing piece stretches out and fixes from the turn of spouting the ammonia branch pipe, high-pressurepipe's one end is stretched out and is spouted ammonia branch pipe and high pressurized air source and be connected, the other end and efflux type sweep the shower nozzle and connect, the position that the efflux type swept the shower nozzle and the position of beating the subassembly corresponds.
Preferably, the rapping assembly is provided with a plurality of rapping assemblies, and the plurality of rapping assemblies are arranged in the ammonia spraying branch pipe at equal intervals.
Preferably, the telescopic supporting rod is an electric telescopic rod or a pneumatic telescopic rod.
Preferably, the vibrating rod is provided with a limiting plate, and the limiting plate is close to the outer side wall of the ammonia spraying branch pipe.
Preferably, a flexible sealing sleeve is arranged at the joint of the vibrating rod and the through hole.
Preferably, the number of the arc-shaped vibrating plates is more than or equal to three.
The beneficial technical effects of the utility model are as follows:
the ammonia spraying branch pipe of the utility model is internally provided with a plurality of groups of rapping components, the rapping motor of the rapping components transmits the vibration force to the arc-shaped rapping plates through the vibrating rods, and the plurality of arc-shaped rapping plates are all close to the side wall of the ammonia spraying branch pipe, so the arc-shaped rapping plates can vibrate rapidly and contact with the side wall of the ammonia spraying branch pipe,
the method comprises the following steps of (1) crushing and loosening ash scales adhered to the side wall of an ammonia spraying branch pipe, setting a plurality of groups of rapping components to operate in a grading manner, wherein the rapping range is wider and the rapping effect is better, a high-pressure air pipe of the rapping component conveys compressed air to an injection type purging nozzle, high-pressure air flow generated by the nozzle purges the crushed and loosened ash scales, and a telescopic vibrating rod extends or shortens along with the grading operation of the plurality of groups of rapping components to ensure that the injection type purging nozzle always operates with the working group of rapping components; the utility model solves the problem that the wall surface of the ammonia injection branch pipe is easy to adhere dust and scale to cause blockage, ensures the uniformity of ammonia nitrogen mixing, improves the denitration efficiency and reduces ammonia escape.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic sectional view taken along line B-B of FIG. 1;
FIG. 3 is a schematic structural view of a flexible sealing sleeve arranged between a vibrating rod and a through hole of an ammonia injection branch pipe;
FIG. 4 is a schematic view showing the connection between an existing ammonia injection branch pipe and an ammonia-air mixing large header.
In the figure, 11 parts of an ammonia spraying branch pipe, 111 parts of a through hole, 121 parts of an arc-shaped vibrating plate, 122 parts of a vibrating motor, 123 parts of a vibrating rod, 124 parts of a limiting plate, 13 parts of a telescopic supporting rod, 131 parts of a jet flow type purging spray head, 132 parts of a flexible sealing sleeve, 14 parts of a high-pressure air pipe and 15 parts of an ammonia air mixing large header.
Detailed Description
First embodiment, referring to the attached figures 1-4 of the specification, an anti-blocking ammonia spraying branch pipe purging device for an SCR denitration system comprises a purging assembly and a rapping assembly which are arranged in a circular ammonia spraying branch pipe,
the rapping assembly comprises a plurality of arc-shaped rapping plates with the same size and a vibrating motor, the arc-shaped rapping plates are correspondingly sleeved in the ammonia spraying branch pipe, a certain gap is formed between the arc-shaped vibrating plate and the ammonia spraying branch pipe, the radian of the arc-shaped rapping plates is smaller than 120 degrees, the influence of overlapping between the arc-shaped rapping plates on rapping effect is avoided, a vibrating rod is fixedly connected in the middle of the outer side surface of each arc-shaped rapping plate along the radial direction, a plurality of through holes are uniformly distributed in the side wall of the ammonia spraying branch pipe along the circumferential direction, the size of each through hole is larger than that of each vibrating rod, the number of the through holes is the same as that of the arc-shaped rapping plates, a plurality of radial vibrating rods respectively extend outwards from the plurality of through holes, the end parts of the extending radial vibrating rods are fixedly connected with the vibrating motor, and the vibrating motor transmits the vibrating force to the arc-shaped rapping plates through the vibrating rods;
the subassembly that sweeps include flexible bracing piece, high-pressurepipe, the efflux type sweeps the shower nozzle, flexible bracing piece is coaxial to be set up in spouting the ammonia branch pipe, the efflux type sweeps the flexible end of shower nozzle fixed connection at flexible bracing piece, the stiff end of flexible bracing piece stretches out and fixes from the turn of spouting the ammonia branch pipe, high-pressurepipe's one end is stretched out and is spouted ammonia branch pipe and high pressurized air source and connect, the other end and efflux type sweep the shower nozzle and connect, the efflux type sweeps the position of shower nozzle and shakes the position correspondence of subassembly and is blown by the efflux type by broken loose bonding dirt, flexible bracing piece also can be established to a hollow metal trachea, this metal trachea is direct to sweep the shower nozzle with the efflux type and is connected.
The rapping assemblies are arranged in a plurality of numbers, and the rapping assemblies are arranged in the ammonia spraying branch pipe at equal intervals. The telescopic supporting rod is an electric telescopic supporting rod or a pneumatic telescopic supporting rod.
The vibrating arm on be equipped with the limiting plate, this limiting plate is close to the lateral wall of spouting the ammonia branch pipe, when this limiting plate avoids the vibrating arm vibration, vibrating motor and the lateral wall contact of spouting the ammonia branch pipe.
The flexible sealing sleeve for sealing the through hole is arranged at the joint of the vibrating rod and the through hole, so that the purging gas is prevented from leaking from the through hole, and the number of the arc-shaped vibrating plates is more than or equal to three
The number of the arc-shaped vibrating plates can be selected according to the field working conditions.
The working process of the utility model is as follows: when the device is started to purge, a rapping motor of the rapping assembly transmits vibration force to the arc rapping plates through the vibrating rods, the arc rapping plates are close to the side walls of the ammonia spraying branch pipes, so that the arc rapping plates can rapidly vibrate to be in contact with the side walls of the ammonia spraying branch pipes, ash scales adhered to the side walls of the ammonia spraying branch pipes are broken and loosened, a plurality of groups of rapping assemblies are arranged to run in a grading manner, the rapping range is wider, the effect is better, a high-pressure air pipe of the rapping assembly conveys compressed air to the jet type purging nozzle, high-pressure air flow generated by the nozzle purges the broken and loosened ash scales, the telescopic supporting rods extend or shorten along with the grading running of the groups of rapping assemblies, and the jet type purging nozzle is guaranteed to always work with the group rapping assembly; the utility model solves the problem that the wall surface of the ammonia injection branch pipe is easy to adhere dust and scale to cause blockage, ensures the uniformity of ammonia nitrogen mixing, improves the denitration efficiency and reduces ammonia escape.
Claims (6)
1. The utility model provides a SCR deNOx systems prevents stifled type and spouts ammonia branch pipe and sweep device, including installing sweeping the subassembly and shaking the subassembly, characterized by in the circular ammonia branch pipe that spouts:
the vibration component comprises a plurality of arc vibration plates with the same size and a vibration motor, the arc vibration plates are correspondingly sleeved in the ammonia spraying branch pipe, a certain gap is formed between the arc vibration plates and the ammonia spraying branch pipe, the radian of each arc vibration plate is less than 120 degrees, a vibration rod is fixedly connected to the middle of the outer side surface of each arc vibration plate along the radial direction, a plurality of through holes are uniformly distributed on the side wall of the ammonia spraying branch pipe along the circumferential direction, the number of the through holes is the same as that of the arc vibration plates, the plurality of radial vibration rods respectively extend outwards from the plurality of through holes, and the end parts of the extending radial vibration rods are fixedly connected with the vibration motor;
the subassembly that sweeps sweep the shower nozzle including flexible bracing piece, high-pressurepipe, efflux type, flexible bracing piece is coaxial to be set up in spouting the ammonia branch pipe, the efflux type sweeps shower nozzle fixed connection and stretches out and fix at the flexible end of flexible bracing piece, the stiff end of flexible bracing piece stretches out and fixes from the turn of spouting the ammonia branch pipe, high-pressurepipe's one end is stretched out and is spouted ammonia branch pipe and high pressurized air source and be connected, the other end and efflux type sweep the shower nozzle and connect, the position that the efflux type swept the shower nozzle and the position of beating the subassembly corresponds.
2. The anti-blocking ammonia spraying branch pipe purging device for the SCR denitration system as claimed in claim 1, wherein: the rapping assemblies are arranged in a plurality of numbers, and the rapping assemblies are arranged in the ammonia spraying branch pipe at equal intervals.
3. The anti-blocking ammonia spraying branch pipe purging device for the SCR denitration system as claimed in claim 2, wherein: the telescopic supporting rod is an electric telescopic rod or a pneumatic telescopic rod.
4. The anti-blocking ammonia spraying branch pipe purging device for the SCR denitration system as claimed in claim 1, wherein: the vibrating rod is provided with a limiting plate, and the limiting plate is close to the outer side wall of the ammonia spraying branch pipe.
5. The anti-blocking ammonia spraying branch pipe purging device for the SCR denitration system as claimed in claim 1, wherein: and a flexible sealing sleeve is arranged at the joint of the vibrating rod and the through hole.
6. The anti-blocking ammonia spraying branch pipe purging device for the SCR denitration system as claimed in claim 1, wherein: the number of the arc-shaped vibrating plates is more than or equal to three.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121764391.6U CN215962976U (en) | 2021-07-30 | 2021-07-30 | Anti-blocking ammonia spraying branch pipe purging device for SCR denitration system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121764391.6U CN215962976U (en) | 2021-07-30 | 2021-07-30 | Anti-blocking ammonia spraying branch pipe purging device for SCR denitration system |
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| CN215962976U true CN215962976U (en) | 2022-03-08 |
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| CN202121764391.6U Active CN215962976U (en) | 2021-07-30 | 2021-07-30 | Anti-blocking ammonia spraying branch pipe purging device for SCR denitration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749433A (en) * | 2022-03-16 | 2022-07-15 | 华能上海石洞口发电有限责任公司 | Automatic device that sweeps of ammonia pipe is spouted in denitration |
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2021
- 2021-07-30 CN CN202121764391.6U patent/CN215962976U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749433A (en) * | 2022-03-16 | 2022-07-15 | 华能上海石洞口发电有限责任公司 | Automatic device that sweeps of ammonia pipe is spouted in denitration |
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