CN108159869A - Flue gas denitrification system urea measuring and injecting device and method - Google Patents
Flue gas denitrification system urea measuring and injecting device and method Download PDFInfo
- Publication number
- CN108159869A CN108159869A CN201810036169.0A CN201810036169A CN108159869A CN 108159869 A CN108159869 A CN 108159869A CN 201810036169 A CN201810036169 A CN 201810036169A CN 108159869 A CN108159869 A CN 108159869A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- flue gas
- urea
- spray gun
- denitrification system
- 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.)
- Pending
Links
- 239000004202 carbamide Substances 0.000 title claims abstract description 75
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 title claims abstract description 74
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 239000003546 flue gas Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 44
- 239000007921 spray Substances 0.000 claims abstract description 42
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000002700 urine Anatomy 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/79—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention 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.Apparatus of the present invention can realize being precisely controlled for urea liquid to the control of the urea liquid of small flow progress, meet the requirement that urea flow is controlled in flue gas denitrification system by setting surge tank and metering pump between urea liquid feedway and spray gun.Apparatus of the present invention are simple in structure, are easy to that traditional flue gas denitrification system is transformed, and improvement cost is low, and the invention also discloses a kind of flue gas denitrification system urea to measure injection method, and this method is convenient for promoting the use of.
Description
Technical field
The present invention relates to a kind of flue gas denitrification system urea measuring and injecting device and methods, belong to gas denitrifying technology neck
Domain.
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 exists per hour
Less than 50 liters of Small Flow Control controls urea flow by the regulating valve in traditional SNCR flue gas denitrification systems and flowmeter
Mode, can not meet at all control urea flow requirement.
Invention content
The object of the present invention is to provide a kind of flue gas denitrification system urea measuring and injecting device and method, by this hair
Bright device and method can accurately control the flow of urea liquid, meet the requirement of Small Flow Control urea liquid.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：Flue gas denitrification system urea metered injection
Device, including spray gun, the first pipeline, the second pipeline and surge tank, one end of the first pipeline is connect by a hoses with spray gun, separately
One end is connect with compressed air feedway, and one end of the second pipeline is connect by b hoses with spray gun, and the other end is connected to described
Surge tank, surge tank are connect with urea liquid feedway.Spray gun is used to spray urea liquid；Surge tank is molten for keeping in urea
Liquid；Compressed air feedway is used to input compressed air into the first pipeline.Urea liquid feedway is used for surge tank
Middle input urea liquid.A hoses are for connecting the first pipeline and spray gun, and b hoses are for the second pipeline of connection and spray gun.Surge tank
Stable urea liquid source is capable of providing, no surge tank can cause metering pump unstable.
In aforementioned flue gas denitrification system urea measuring and injecting device, metering pump is installed on second pipeline.Metering
Pump can in the range of 0%-100% step-less adjustment urea liquid flow, realize and urea liquid flow be precisely controlled.
In aforementioned flue gas denitrification system urea measuring and injecting device, between the surge tank and urea liquid feedway
It is provided with valving.
In aforementioned flue gas denitrification system urea measuring and injecting device, the valving is for electric switching valve or pneumatically
Switch valve.
In aforementioned flue gas denitrification system urea measuring and injecting device, on-off valve device is provided on first pipeline.
In aforementioned flue gas denitrification system urea measuring and injecting device, the on-off valve device is electric switching valve or gas
Dynamic switch valve.
In aforementioned flue gas denitrification system urea measuring and injecting device, 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.
Flue gas denitrification system urea measures injection method, which is characterized in that the compression from compressed air feedway is empty
Gas is passed through spray gun after the first pipeline, on-off valve device, pressure-regulating valve and pressure gauge；From urea liquid feedway
Urea liquid enters surge tank by valving first, extracts the urea liquid cached in surge tank by metering pump, is taken out
The urea liquid taken is then passed directly into spray gun, is passed through the urea liquid in spray gun and is sprayed together with the compressed air for being passed through spray gun.
Compared with prior art, apparatus of the present invention by between urea liquid feedway and spray gun set 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.Apparatus of the present invention are simple in structure, are easy to that traditional flue gas denitrification system is transformed, transformation
At low cost, the method for the present invention is convenient for promoting the use of.
Description of the drawings
Fig. 1 is a kind of structure diagram of embodiment of the present invention.
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- pressures
Power table, 13-a hoses.
The present invention is further illustrated with reference to the accompanying drawings and detailed description.
Specific embodiment
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
Surge tank 4, one end of the first pipeline 2 are 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
Surge tank 4, one end of the first pipeline 2 are 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.Valve is provided 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 set 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
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
Surge tank 4, one end of the first pipeline 2 are 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.Valve is provided between surge tank 4 and urea liquid feedway 7
Device 9.Valving 9 is pneumatic on-off valve.On-off valve device 10 is provided 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 apparatus of the present invention：Start on-off valve device 10, the pressure-regulating valve 11 on the first pipeline 2, come from
The compressed air of compressed air feedway 6 is passed through spray gun 1, the real time monitoring pressure of pressure gauge 12 by the first pipeline 2 and a hoses 13
The pressure of contracting air,；Start valving 9 simultaneously, the urea liquid from urea liquid feedway 7 passes through valving 9
Into surge tank 4, after the urea liquid pump 8 to be batched being temporarily stored in surge tank 4 is opened, measured pump 8 is pumped into spray gun 1,
It is sprayed together with compressed air in spray gun 1.
Embodiment 4：Flue gas denitrification system urea measures injection method：Compressed air warp from compressed air feedway
Spray gun is passed through after crossing the first pipeline, on-off valve device, pressure-regulating valve and pressure gauge；Urine from urea liquid feedway 7
Plain solution enters surge tank by valving first, extracts the urea liquid cached in surge tank by metering pump, is extracted
Urea liquid be then passed directly into spray gun, be passed through the urea liquid in spray gun and sprayed together with the compressed air for being passed through spray gun.
Claims (8)
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
Road (3) and surge tank (4), one end of first pipeline (2) are 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
(10) are put as electric switching valve or pneumatic on-off valve.
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) mounted on pressure gauge (12) with
On the first pipeline (2) between on-off valve device (10).
8. the flue gas denitrification system urea as described in any one of claim 1~7 claim measures injection method, feature exists
In the compressed air from compressed air feedway is after the first pipeline, on-off valve device, pressure-regulating valve and pressure gauge
It is passed through spray gun；Urea liquid from urea liquid feedway enters surge tank by valving first, passes through metering pump
The urea liquid cached in surge tank is extracted, the urea liquid being extracted then is passed directly into spray gun, and the urea being passed through in spray gun is molten
Liquid sprays together with the compressed air for being passed through spray gun.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036169.0A CN108159869A (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810036169.0A CN108159869A (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108159869A true CN108159869A (en) | 2018-06-15 |
Family
ID=62514457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810036169.0A Pending CN108159869A (en) | 2018-01-15 | 2018-01-15 | Flue gas denitrification system urea measuring and injecting device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108159869A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006122878A (en) * | 2004-11-01 | 2006-05-18 | Babcock Hitachi Kk | Exhaust gas denitrification system and method |
| US20100319322A1 (en) * | 2008-03-12 | 2010-12-23 | Huethwohl Georg | Metering system for injecting a urea solution into the exhaust gas flow of an internal combustion engine |
| CN202700347U (en) * | 2012-06-29 | 2013-01-30 | 邹庆泉 | Smoke selective non-catalytic reduction (SNCR) denitration complete plant |
| CN203737102U (en) * | 2014-04-04 | 2014-07-30 | 大唐科技产业集团有限公司 | Distribution and injection module and system for SNCR (Selective Non Catalytic Reduction) flue gas denitrification system |
| CN204247073U (en) * | 2014-11-24 | 2015-04-08 | 彭峻 | Diesel engine selective-catalytic-reduction-based flue gas denitrifying device |
| CN204911211U (en) * | 2015-06-17 | 2015-12-30 | 上海洁昊环保股份有限公司 | Measurement distribution module |
| CN107314118A (en) * | 2017-07-06 | 2017-11-03 | 江苏华电仪征热电有限公司 | A kind of novel condensation water recycles regulating valve |
| CN207886961U (en) * | 2018-01-15 | 2018-09-21 | 中国华电科工集团有限公司 | Flue gas denitrification system urea measuring and injecting device |
-
2018
- 2018-01-15 CN CN201810036169.0A patent/CN108159869A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006122878A (en) * | 2004-11-01 | 2006-05-18 | Babcock Hitachi Kk | Exhaust gas denitrification system and method |
| US20100319322A1 (en) * | 2008-03-12 | 2010-12-23 | Huethwohl Georg | Metering system for injecting a urea solution into the exhaust gas flow of an internal combustion engine |
| CN202700347U (en) * | 2012-06-29 | 2013-01-30 | 邹庆泉 | Smoke selective non-catalytic reduction (SNCR) denitration complete plant |
| CN203737102U (en) * | 2014-04-04 | 2014-07-30 | 大唐科技产业集团有限公司 | Distribution and injection module and system for SNCR (Selective Non Catalytic Reduction) flue gas denitrification system |
| CN204247073U (en) * | 2014-11-24 | 2015-04-08 | 彭峻 | Diesel engine selective-catalytic-reduction-based flue gas denitrifying device |
| CN204911211U (en) * | 2015-06-17 | 2015-12-30 | 上海洁昊环保股份有限公司 | Measurement distribution module |
| CN107314118A (en) * | 2017-07-06 | 2017-11-03 | 江苏华电仪征热电有限公司 | A kind of novel condensation water recycles regulating valve |
| CN207886961U (en) * | 2018-01-15 | 2018-09-21 | 中国华电科工集团有限公司 | Flue gas denitrification system urea measuring and injecting device |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180615 |
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| WD01 | Invention patent application deemed withdrawn after publication |