CN207886961U - Flue gas denitrification system urea measuring and injecting device - Google Patents
Flue gas denitrification system urea measuring and injecting device Download PDFInfo
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- CN207886961U CN207886961U CN201820064025.1U CN201820064025U CN207886961U CN 207886961 U CN207886961 U CN 207886961U CN 201820064025 U CN201820064025 U CN 201820064025U CN 207886961 U CN207886961 U CN 207886961U
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- pipeline
- flue gas
- denitrification system
- gas denitrification
- surge tank
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Abstract
The utility model discloses flue gas denitrification system urea measuring and injecting devices, including spray gun, the first pipeline, the second pipeline and surge tank, one end of first pipeline is connect by a hoses with spray gun, the other end is connect with compressed air feedway, one end of second pipeline is connect by b hoses with spray gun, the other end is connected to the surge tank, and surge tank is connect with urea liquid feedway.For the utility model by the way that surge tank and metering pump are arranged between urea liquid feedway and spray gun, the control that can be carried out to the urea liquid of small flow realizes being precisely controlled for urea liquid, meets the requirement that urea flow is controlled in flue gas denitrification system.The utility model is simple in structure, is easy to that traditional flue gas denitrification system is transformed, and improvement cost is low, convenient for promoting the use of.
Description
Technical field
The utility model is related to flue gas denitrification system urea measuring and injecting devices, belong to gas denitrifying technology field.
Background technology
The principle of SNCR technologies is to spray into ammonia reducing agent in burner hearth, and the nitrogen oxides in flue gas is reduced to N2.Tradition
The distribution spout parts of SNCR flue gas denitrification systems urea flow cannot be precisely controlled, especially flow per hour
In 50 liters of Small Flow Controls below, flow of urea is controlled by regulating valve in traditional SNCR flue gas denitrification systems and flowmeter
The mode of amount cannot be satisfied the requirement of control urea flow at all.
Utility model content
The purpose of the utility model is to provide a kind of flue gas denitrification system urea measuring and injecting devices, use the device
The flow that urea liquid can accurately be controlled, meets the requirement of Small Flow Control urea liquid.
In order to solve the above technical problems, the utility model adopts the following technical scheme：Flue gas denitrification system urea measures
One end of injection apparatus, including spray gun, the first pipeline, the second pipeline and surge tank, the first pipeline is connected by a hoses and spray gun
It connects, the other end is connect with compressed air feedway, and one end of the second pipeline is connect by b hoses with spray gun, other end connection
In the surge tank, surge tank is connect with urea liquid feedway.Spray gun is for spraying urea liquid；Surge tank is for keeping in
Urea liquid；Compressed air feedway into the first pipeline for inputting compressed air.Urea liquid feedway be used for
Urea liquid is inputted in surge tank.A hoses are for connecting the first pipeline and spray gun, and b hoses are for connecting the second pipeline and spray gun.
In flue gas denitrification system urea measuring and injecting device above-mentioned, metering pump is installed on second pipeline.Metering
Pump can within the scope of 0%-100% step-less adjustment urea liquid flow, realization urea liquid flow is precisely controlled.
In flue gas denitrification system urea measuring and injecting device above-mentioned, between the surge tank and urea liquid feedway
It is provided with valving.Surge tank is capable of providing stable urea liquid source, and no surge tank can cause metering pump unstable.
In flue gas denitrification system urea measuring and injecting device above-mentioned, the valving is for electric switching valve or pneumatically
Switch valve.
In flue gas denitrification system urea measuring and injecting device above-mentioned, on-off valve device is provided on first pipeline.
In flue gas denitrification system urea measuring and injecting device above-mentioned, the on-off valve device is electric switching valve or gas
Dynamic switch valve.
In flue gas denitrification system urea measuring and injecting device above-mentioned, pressure-regulating valve is additionally provided on first pipeline
And pressure gauge, the pressure-regulating valve are mounted on the first pipeline between pressure gauge and on-off valve device.
Compared with prior art, the utility model by between urea liquid feedway and spray gun be arranged surge tank and
Metering pump, the control that can be carried out to the urea liquid of small flow, realizes being precisely controlled for urea liquid, meets in flue gas
The requirement of urea flow is controlled in denitrating system.The utility model is simple in structure, is easy to that traditional flue gas denitrification system is transformed, transformation
It is at low cost, convenient for promoting the use of.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of embodiment of the utility model.
Reference numeral：1- spray guns, the first pipelines of 2-, the second pipelines of 3-, 4- surge tanks, 5-b hoses, the supply of 6- compressed airs
Device, 7- urea liquid feedways, 8- metering pumps, 9- valvings, 10- on-off valve devices, 11- pressure-regulating valves, 12-
Pressure gauge, 13-a hoses.
The utility model is further described with reference to the accompanying drawings and detailed description.
Specific implementation mode
Embodiment 1：Flue gas denitrification system urea measuring and injecting device, including spray gun 1, the first pipeline 2,3 and of the second pipeline
One end of surge tank 4, the first pipeline 2 is connect by a hoses 13 with spray gun 1, and the other end is connect with compressed air feedway 6,
One end of second pipeline 3 is connect by b hoses 5 with spray gun 1, and the other end is connected to surge tank 4, and surge tank 4 is supplied with urea liquid
It is connected to device 7.
Embodiment 2：Flue gas denitrification system urea measuring and injecting device, including spray gun 1, the first pipeline 2,3 and of the second pipeline
One end of surge tank 4, the first pipeline 2 is connect by a hoses 13 with spray gun 1, and the other end is connect with compressed air feedway 6,
One end of second pipeline 3 is connect by b hoses 5 with spray gun 1, and the other end is connected to surge tank 4, and surge tank 4 is supplied with urea liquid
It is connected to device 7.Metering pump 8 is installed on second pipeline 3.It is provided with valve between surge tank 4 and urea liquid feedway 7
Device 9.In order to ensure the input speed of urea liquid, using electric switching valve as valving 9.It is arranged on first pipeline 2
There is on-off valve device 10.On-off valve device 10 is electric switching valve.Pressure-regulating valve 11 and pressure are additionally provided on first pipeline 2
Power table 12, pressure-regulating valve 11 are mounted on the first pipeline 2 between pressure gauge 12 and on-off valve device 10.
Embodiment 3：Flue gas denitrification system urea measuring and injecting device, including spray gun 1, the first pipeline 2,3 and of the second pipeline
One end of surge tank 4, the first pipeline 2 is connect by a hoses 13 with spray gun 1, and the other end is connect with compressed air feedway 6,
One end of second pipeline 3 is connect by b hoses 5 with spray gun 1, and the other end is connected to surge tank 4, and surge tank 4 is supplied with urea liquid
It is connected to device 7.Metering pump 8 is installed on second pipeline 3.It is provided with valve between surge tank 4 and urea liquid feedway 7
Device 9.Valving 9 is pneumatic on-off valve.It is provided with on-off valve device 10 on first pipeline 2.On-off valve device 10 is pneumatic
Switch valve.Be additionally provided with pressure-regulating valve 11 and pressure gauge 12 on first pipeline 2, pressure-regulating valve 11 be mounted on pressure gauge 12 with
On the first pipeline 2 between on-off valve device 10.
The operation principle of utility model device：Start on-off valve device 10, the pressure-regulating valve 11 on the first pipeline 2,
Compressed air from compressed air feedway 6 is passed through spray gun 1 by the first pipeline 2 and a hoses 13, and pressure gauge 12 is supervised in real time
The pressure of compressed air is controlled, while starting valving 9, the urea liquid from urea liquid feedway 7 is filled by valve
It sets 9 and enters surge tank 4, after the urea liquid being temporarily stored in surge tank 4 pump 8 to be batched is opened, measured pump 8 is pumped into spray gun 1
In, it is sprayed together with compressed air in spray gun 1.
Claims (7)
1. flue gas denitrification system urea measuring and injecting device, which is characterized in that including spray gun (1), the first pipeline (2), the second pipe
One end of road (3) and surge tank (4), first pipeline (2) is connect by a hoses (13) with spray gun (1), the other end and compression
Air feeder (6) connects, and one end of second pipeline (3) is connect by b hoses (5) with spray gun (1), other end connection
In the surge tank (4), the surge tank (4) connect with urea liquid feedway (7).
2. flue gas denitrification system urea measuring and injecting device according to claim 1, which is characterized in that second pipeline
(3) metering pump (8) is installed on.
3. flue gas denitrification system urea measuring and injecting device according to claim 1, which is characterized in that the surge tank
(4) valving (9) is provided between urea liquid feedway (7).
4. flue gas denitrification system urea measuring and injecting device according to claim 3, which is characterized in that the valving
(9) it is electric switching valve or pneumatic on-off valve.
5. flue gas denitrification system urea measuring and injecting device according to claim 1, which is characterized in that first pipeline
(2) on-off valve device (10) is provided on.
6. flue gas denitrification system urea measuring and injecting device according to claim 5, which is characterized in that the switch valve dress
It is electric switching valve or pneumatic on-off valve to set (10).
7. flue gas denitrification system urea measuring and injecting device according to claim 6, which is characterized in that first pipeline
(2) be additionally provided with pressure-regulating valve (11) and pressure gauge (12) on, the pressure-regulating valve (11) be mounted on pressure gauge (12) with
On the first pipeline (2) between on-off valve device (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064025.1U CN207886961U (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820064025.1U CN207886961U (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device |
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| Publication Number | Publication Date |
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| CN207886961U true CN207886961U (en) | 2018-09-21 |
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| CN201820064025.1U Active CN207886961U (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159869A (en) * | 2018-01-15 | 2018-06-15 | 中国华电科工集团有限公司 | Flue gas denitrification system urea measuring and injecting device and method |
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2018
- 2018-01-15 CN CN201820064025.1U patent/CN207886961U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108159869A (en) * | 2018-01-15 | 2018-06-15 | 中国华电科工集团有限公司 | Flue gas denitrification system urea measuring and injecting device and method |
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